Skip to content

Instantly share code, notes, and snippets.

@wez

wez/README.md

Last active November 22, 2018 18:17
Show Gist options
  • Save wez/a8749dbd0f3db7bbe207ff4cb7679d2e to your computer and use it in GitHub Desktop.
Save wez/a8749dbd0f3db7bbe207ff4cb7679d2e to your computer and use it in GitHub Desktop.
Download ZIP
GPIO/I2C kernel support for UP2 board, taken from https://aur.archlinux.org/packages/linux-up/ and applied to ubuntu bionic
Raw
README.md

How to build and use it

I'm mostly blindly following information from this guide: https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel

Enable kernel source fetching

sudo vim /etc/apt/sources.list and uncomment these lines:

deb-src http://us.archive.ubuntu.com/ubuntu/ bionic main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ bionic-updates main restricted

$ sudo apt update
$ sudo apt-get build-dep linux-image-$(uname -r)

Deps for building the kernel

$ sudo apt-get install libncurses-dev libssl-dev libelf-dev gawk

Fetch sources from git and apply this patch

$ git clone git://kernel.ubuntu.com/ubuntu/ubuntu-bionic.git
$ cd ubuntu-bionic
$ patch -p1 < ~/Downloads/ubuntu-up-board.patch

Note: you may need to edit the first line of debian.master/changelog; it looks like this at the time of writing this gist:

linux (4.15.0-40.42+upboard) bionic; urgency=medium

The +upboard part is important and shows up in your uname -a output when the kernel is running and disambiguates your kernel from the official ubuntu packages, however, when I build the kernel it generates an linux-image-unsigned-4.15.0-40-generic_4.15.0-40.42+upboard_amd64.deb package. The official ubuntu packages are signed and the package name is linux-image instead, so if you have the same version number (aside from the +upboard) as your currently installed kernel, your linux-image-unsigned package will conflict with the official linux-image package. For that reason, I suggest bumping the actual version number as I have done in this gist.

Build it

This takes a couple of hours on the UP board itself. You may want to run this on a faster system and then copy the packages over to your UP board.

Run these steps in your ubuntu-bionic git repo:

$ fakeroot debian/rules clean
$ fakeroot debian/rules binary-headers binary-generic

Once done the parent directory of ubuntu-bionic will have a few packages:

$ ls ../*.deb -1
../linux-cloud-tools-4.15.0-40-generic_4.15.0-40.42+upboard_amd64.deb
../linux-headers-4.15.0-40-generic_4.15.0-40.42+upboard_amd64.deb
../linux-headers-4.15.0-40_4.15.0-40.42+upboard_all.deb
../linux-image-unsigned-4.15.0-40-generic_4.15.0-40.42+upboard_amd64.deb
../linux-modules-4.15.0-40-generic_4.15.0-40.42+upboard_amd64.deb
../linux-modules-extra-4.15.0-40-generic_4.15.0-40.42+upboard_amd64.deb
../linux-tools-4.15.0-40-generic_4.15.0-40.42+upboard_amd64.deb

You only strictly need to install the core kernel and modules:

$ cd ..
$ sudo dpkg -i linux-image-unsigned-4.15.0-40-generic_4.15.0-40.42+upboard_amd64.deb \
   linux-modules-4.15.0-40-generic_4.15.0-40.42+upboard_amd64.deb \
   linux-modules-extra-4.15.0-40-generic_4.15.0-40.42+upboard_amd64.deb

Then reboot and your should be running your new kernel:

$ uname -a
Linux up2 4.15.0-40-generic #42+upboard SMP Wed Nov 21 23:34:11 PST 2018 x86_64 x86_64 x86_64 GNU/Linux
Raw
ubuntu-up-board.patch
diff --git a/debian.master/changelog b/debian.master/changelog
index b77f448b1..bd6e70b62 100644
--- a/debian.master/changelog
+++ b/debian.master/changelog
@@ -1,4 +1,4 @@
-linux (4.15.0-39.42) bionic; urgency=medium
+linux (4.15.0-40.42+upboard) bionic; urgency=medium
* linux: 4.15.0-39.42 -proposed tracker (LP: #1799411)
diff --git a/debian.master/config/amd64/config.flavour.generic b/debian.master/config/amd64/config.flavour.generic
index d1662374e..23f232a10 100644
--- a/debian.master/config/amd64/config.flavour.generic
+++ b/debian.master/config/amd64/config.flavour.generic
@@ -8,3 +8,4 @@ CONFIG_HZ_250=y
# CONFIG_LATENCYTOP is not set
# CONFIG_PREEMPT is not set
CONFIG_PREEMPT_VOLUNTARY=y
+CONFIG_UP_BOARD=y
diff --git a/debian.master/config/amd64/config.flavour.lowlatency b/debian.master/config/amd64/config.flavour.lowlatency
index 814348dc9..2f2d143be 100644
--- a/debian.master/config/amd64/config.flavour.lowlatency
+++ b/debian.master/config/amd64/config.flavour.lowlatency
@@ -8,3 +8,4 @@ CONFIG_IRQ_FORCED_THREADING_DEFAULT=y
CONFIG_LATENCYTOP=y
CONFIG_PREEMPT=y
# CONFIG_PREEMPT_VOLUNTARY is not set
+# CONFIG_UP_BOARD is not set
diff --git a/debian.master/config/i386/config.common.i386 b/debian.master/config/i386/config.common.i386
index 6029c21a8..e2bec6b39 100644
--- a/debian.master/config/i386/config.common.i386
+++ b/debian.master/config/i386/config.common.i386
@@ -490,6 +490,7 @@ CONFIG_UIO_PRUSS=m
CONFIG_UIO_SERCOS3=m
CONFIG_ULTRIX_PARTITION=y
CONFIG_UNIXWARE_DISKLABEL=y
+# CONFIG_UP_BOARD is not set
CONFIG_USB_DWC2_PCI=m
CONFIG_USB_EHCI_HCD_PLATFORM=y
CONFIG_USB_GADGET=m
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index da435a741..294a8b99f 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -1148,6 +1148,18 @@ config INTEL_TELEMETRY
directly via debugfs files. Various tools may use
this interface for SoC state monitoring.
+config UP_BOARD
+ bool "UP Board Platform I/O Driver"
+ depends on ACPI && PINCTRL_CHERRYVIEW
+ select GPIOLIB_IRQCHIP
+ select LEDS_CLASS
+ select NEW_LEDS
+ ---help---
+ This driver provides support for the platform functions on the UP
+ board. It includes platform, pinctrl and gpio drivers for the CPLD
+ that manages the external pin header, as well as a driver for the
+ built-in LEDs.
+
config MLX_PLATFORM
tristate "Mellanox Technologies platform support"
depends on X86_64
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index 8cb9fb7cb..5a476a091 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -86,6 +86,11 @@ obj-$(CONFIG_INTEL_TELEMETRY) += intel_telemetry_core.o \
intel_telemetry_pltdrv.o \
intel_telemetry_debugfs.o
obj-$(CONFIG_INTEL_PMC_CORE) += intel_pmc_core.o
+obj-$(CONFIG_UP_BOARD) += up_board.o \
+ up_board_cpld.o \
+ up_board_pinctrl.o \
+ up_board_gpio.o \
+ up_board_leds.o
obj-$(CONFIG_PMC_ATOM) += pmc_atom.o
obj-$(CONFIG_MLX_PLATFORM) += mlx-platform.o
obj-$(CONFIG_MLX_CPLD_PLATFORM) += mlxcpld-hotplug.o
diff --git a/drivers/platform/x86/up_board.c b/drivers/platform/x86/up_board.c
new file mode 100644
index 000000000..dbaa496d8
--- /dev/null
+++ b/drivers/platform/x86/up_board.c
@@ -0,0 +1,159 @@
+/*
+ * UP Board platform driver.
+ *
+ * Copyright (c) 2016, Emutex Ltd. All rights reserved.
+ *
+ * Author: Dan O'Donovan <[email protected]>
+ * Modifications: Sean Greenslade <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/module.h>
+#include <linux/dmi.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/machine.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/regulator/fixed.h>
+#include <linux/regulator/machine.h>
+
+/* Internal context information for this driver */
+struct up_board_info {
+ struct platform_device *cpld_pdev;
+ struct pinctrl_map *pinmux_maps;
+ unsigned int num_pinmux_maps;
+};
+
+/*
+ * On the UP board, if the ODEn bit is set on the pad configuration
+ * it seems to impair some functions on the I/O header such as UART, SPI
+ * and I2C. So we disable it for all header pins by default.
+ */
+static unsigned long oden_disable_conf[] = {
+ PIN_CONF_PACKED(PIN_CONFIG_DRIVE_PUSH_PULL, 0),
+};
+
+#define UP_PIN_MAP_MUX_GROUP(d, p, f) \
+ PIN_MAP_MUX_GROUP_DEFAULT(d, p, f "_grp", f)
+
+#define UP_PIN_MAP_CONF_ODEN(d, p, f) \
+ PIN_MAP_CONFIGS_GROUP_DEFAULT(d, p, f "_grp", oden_disable_conf)
+
+/* Maps pin functions on UP Board I/O pin header to specific CHT SoC devices */
+static struct pinctrl_map up_pinmux_maps[] __initdata = {
+ UP_PIN_MAP_MUX_GROUP("8086228A:00", "up-board-pinctrl", "uart1"),
+ UP_PIN_MAP_MUX_GROUP("808622C1:00", "up-board-pinctrl", "i2c0"),
+ UP_PIN_MAP_MUX_GROUP("808622C1:01", "up-board-pinctrl", "i2c1"),
+ UP_PIN_MAP_MUX_GROUP("80862288:00", "up-board-pinctrl", "pwm0"),
+ UP_PIN_MAP_MUX_GROUP("80862288:01", "up-board-pinctrl", "pwm1"),
+ UP_PIN_MAP_MUX_GROUP("8086228E:01", "up-board-pinctrl", "spi2"),
+ UP_PIN_MAP_MUX_GROUP("808622A8:00", "up-board-pinctrl", "i2s2"),
+ UP_PIN_MAP_MUX_GROUP("i2c-ADC081C:00", "up-board-pinctrl", "adc0"),
+
+ UP_PIN_MAP_MUX_GROUP("8086228A:00", "INT33FF:00", "uart1"),
+ UP_PIN_MAP_MUX_GROUP("808622C1:00", "INT33FF:00", "i2c0"),
+ UP_PIN_MAP_MUX_GROUP("808622C1:01", "INT33FF:00", "i2c1"),
+ UP_PIN_MAP_MUX_GROUP("808622C1:02", "INT33FF:00", "i2c2"),
+ UP_PIN_MAP_MUX_GROUP("80862288:00", "INT33FF:03", "pwm0"),
+ UP_PIN_MAP_MUX_GROUP("80862288:01", "INT33FF:03", "pwm1"),
+ UP_PIN_MAP_MUX_GROUP("8086228E:01", "INT33FF:03", "spi2"),
+ UP_PIN_MAP_MUX_GROUP("808622A8:00", "INT33FF:00", "lpe"),
+
+ UP_PIN_MAP_CONF_ODEN("8086228A:00", "INT33FF:00", "uart1"),
+ UP_PIN_MAP_CONF_ODEN("808622C1:00", "INT33FF:00", "i2c0"),
+ UP_PIN_MAP_CONF_ODEN("808622C1:01", "INT33FF:00", "i2c1"),
+ UP_PIN_MAP_CONF_ODEN("80862288:00", "INT33FF:03", "pwm0"),
+ UP_PIN_MAP_CONF_ODEN("80862288:01", "INT33FF:03", "pwm1"),
+ UP_PIN_MAP_CONF_ODEN("8086228E:01", "INT33FF:03", "spi2"),
+ UP_PIN_MAP_CONF_ODEN("808622A8:00", "INT33FF:00", "lpe"),
+};
+
+static struct up_board_info up_board_info = {
+ .pinmux_maps = up_pinmux_maps,
+ .num_pinmux_maps = ARRAY_SIZE(up_pinmux_maps),
+};
+
+static const struct dmi_system_id up_board_id_table[] __initconst = {
+ {
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "AAEON"),
+ DMI_MATCH(DMI_BOARD_NAME, "UP-CHT01"),
+ DMI_MATCH(DMI_BOARD_VERSION, "V0.4"),
+ },
+ .driver_data = &up_board_info,
+ },
+ { }
+};
+
+static struct regulator_consumer_supply vref3v3_consumers[] = {
+ REGULATOR_SUPPLY("vref", "i2c-ADC081C:00"),
+};
+
+static struct up_board_info *up_board;
+
+static int __init
+up_board_init_devices(void)
+{
+ const struct dmi_system_id *system_id;
+ int ret;
+
+ system_id = dmi_first_match(up_board_id_table);
+ if (!system_id)
+ return -ENXIO;
+
+ up_board = system_id->driver_data;
+
+ /* Register pin control mappings specific to board version */
+ if (up_board->pinmux_maps) {
+ ret = pinctrl_register_mappings(up_board->pinmux_maps,
+ up_board->num_pinmux_maps);
+ if (ret) {
+ pr_err("Failed to register UP Board pinctrl mapping");
+ return ret;
+ }
+ }
+
+ /* Create a platform device to manage the UP Board I/O header CPLD */
+ up_board->cpld_pdev =
+ platform_device_register_simple("up-board-cpld",
+ PLATFORM_DEVID_NONE,
+ NULL, 0);
+ if (IS_ERR(up_board->cpld_pdev)) {
+ pr_err("Failed to register UP Board I/O CPLD platform device");
+ return PTR_ERR(up_board->cpld_pdev);
+ }
+
+ regulator_register_always_on(0, "fixed-3.3V",
+ vref3v3_consumers,
+ ARRAY_SIZE(vref3v3_consumers),
+ 3300000);
+
+ return 0;
+}
+
+static void __exit
+up_board_exit(void)
+{
+ platform_device_unregister(up_board->cpld_pdev);
+}
+
+/*
+ * Using arch_initcall to ensure that pinmux maps are registered
+ * before the relevant devices are initialised
+ */
+arch_initcall(up_board_init_devices);
+module_exit(up_board_exit);
+
+MODULE_AUTHOR("Dan O'Donovan <[email protected]>");
+MODULE_DESCRIPTION("Platform driver for UP Board");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("dmi:*:svnAAEON*:rnUP-CHT01:*");
diff --git a/drivers/platform/x86/up_board_cpld.c b/drivers/platform/x86/up_board_cpld.c
new file mode 100644
index 000000000..dc36d6a78
--- /dev/null
+++ b/drivers/platform/x86/up_board_cpld.c
@@ -0,0 +1,560 @@
+/*
+ * UP Board I/O Header CPLD driver.
+ *
+ * Copyright (c) 2016, Emutex Ltd. All rights reserved.
+ *
+ * Author: Dan O'Donovan <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/gpio.h>
+
+#include "up_board_cpld.h"
+#include "up_board_pinctrl.h"
+#include "up_board_gpio.h"
+#include "up_board_leds.h"
+
+/*
+ * The UP Board features an external 40-pin header for I/O functions including
+ * GPIO, I2C, UART, SPI, PWM and I2S, similar in layout to the Raspberry Pi 2.
+ * At the heart of the UP Board is an Intel X5-Z8350 "Cherry Trail" SoC, which
+ * provides the I/O functions for these pins at 1.8V logic levels.
+ *
+ * Additional buffers and mux switches are used between the SoC and the I/O pin
+ * header to convert between the 1.8V SoC I/O and the 3.3V levels required at
+ * the pin header, with sufficient current source/sink capability for LV-TTL
+ * compatibility. These buffers and mux switches require run-time configuration
+ * based on the pin function or GPIO direction selected by the user.
+ *
+ * The purpose of this driver is to manage the complexity of the buffer
+ * configuration so that application code can transparently access the I/O
+ * functions on the external pins through standard kernel interfaces. It
+ * instantiates a gpio and pinctrl device, and effectively acts as a "shim"
+ * between application code and the underlying Cherry Trail GPIO driver.
+ */
+
+/* The Cherry Trail SoC has 4 independent GPIO pin controllers */
+#define SOC_GC_SW "INT33FF:00"
+#define SOC_GC_N "INT33FF:01"
+#define SOC_GC_E "INT33FF:02"
+#define SOC_GC_SE "INT33FF:03"
+
+#define SOC_GPIO(n, o, f) \
+ { \
+ .soc_gc_name = (n), \
+ .soc_gc_offset = (o), \
+ .soc_gpio_flags = (f), \
+ }
+#define SOC_GPIO_INPUT(c, o) SOC_GPIO(c, o, GPIOF_IN)
+#define SOC_GPIO_OUTPUT(c, o) SOC_GPIO(c, o, GPIOF_OUT_INIT_LOW)
+
+#define GPIO_PIN_INFO(d, m, f) \
+ { \
+ .dir_ctrl_offset = (d), \
+ .mux_ctrl_offset = (m), \
+ .func_dir = (f), \
+ .func_enabled = false, \
+ }
+
+#define GPIO_PIN_INFO_NO_MUX(d, f) \
+ GPIO_PIN_INFO(d, UP_BOARD_UNASSIGNED, f)
+
+#define PIN_GROUP(n, p) \
+ { \
+ .name = (n), \
+ .pins = (p), \
+ .npin = ARRAY_SIZE((p)), \
+ }
+
+#define FUNCTION(n, g) \
+ { \
+ .name = (n), \
+ .groups = (g), \
+ .ngroup = ARRAY_SIZE((g)), \
+ }
+
+/* Initial configuration assumes all pins as GPIO inputs */
+#define CPLD_DIR_REG_INIT (0x00FFFFFFFULL)
+
+/* Internal context information for this driver */
+struct up_board_cpld {
+ struct device *dev;
+ struct platform_device *pinctrl_pdev;
+ struct platform_device *gpio_pdev;
+ struct platform_device *leds_pdev;
+ struct up_board_gpio_info strobe_gpio;
+ struct up_board_gpio_info reset_gpio;
+ struct up_board_gpio_info data_in_gpio;
+ struct up_board_gpio_info data_out_gpio;
+ struct up_board_gpio_info oe_gpio;
+ u64 dir_reg;
+ unsigned int dir_reg_size;
+ /* Lock to prevent concurrent access to CPLD */
+ spinlock_t lock;
+};
+
+static int up_board_cpld_reg_set_bit(struct up_board_cpld *cpld,
+ unsigned int offset, int value);
+
+static struct up_board_cpld up_board_cpld = {
+ .strobe_gpio = SOC_GPIO_OUTPUT(SOC_GC_N, 21),
+ .reset_gpio = SOC_GPIO_OUTPUT(SOC_GC_E, 15),
+ .data_in_gpio = SOC_GPIO_OUTPUT(SOC_GC_E, 13),
+ .data_out_gpio = SOC_GPIO_INPUT(SOC_GC_E, 23),
+ .oe_gpio = SOC_GPIO_OUTPUT(SOC_GC_SW, 43),
+ .dir_reg = CPLD_DIR_REG_INIT,
+ .dir_reg_size = 34,
+};
+
+/* Pin control information for the 28 GPIO pins on the UP Board I/O header */
+static struct up_board_pin_info up_board_pins[] = {
+ GPIO_PIN_INFO(9, 28, UP_BOARD_PDIR_OUT), /* 0 */
+ GPIO_PIN_INFO(23, 28, UP_BOARD_PDIR_OUT), /* 1 */
+ GPIO_PIN_INFO(0, 29, UP_BOARD_PDIR_OUT), /* 2 */
+ GPIO_PIN_INFO(1, 29, UP_BOARD_PDIR_OUT), /* 3 */
+ GPIO_PIN_INFO(2, 30, UP_BOARD_PDIR_IN), /* 4 */
+ GPIO_PIN_INFO_NO_MUX(10, UP_BOARD_PDIR_NONE), /* 5 */
+ GPIO_PIN_INFO_NO_MUX(11, UP_BOARD_PDIR_NONE), /* 6 */
+ GPIO_PIN_INFO_NO_MUX(22, UP_BOARD_PDIR_NONE), /* 7 */
+ GPIO_PIN_INFO_NO_MUX(21, UP_BOARD_PDIR_OUT), /* 8 */
+ GPIO_PIN_INFO_NO_MUX(7, UP_BOARD_PDIR_IN), /* 9 */
+ GPIO_PIN_INFO_NO_MUX(6, UP_BOARD_PDIR_OUT), /* 10 */
+ GPIO_PIN_INFO_NO_MUX(8, UP_BOARD_PDIR_OUT), /* 11 */
+ GPIO_PIN_INFO_NO_MUX(24, UP_BOARD_PDIR_OUT), /* 12 */
+ GPIO_PIN_INFO_NO_MUX(12, UP_BOARD_PDIR_OUT), /* 13 */
+ GPIO_PIN_INFO_NO_MUX(15, UP_BOARD_PDIR_OUT), /* 14 */
+ GPIO_PIN_INFO_NO_MUX(16, UP_BOARD_PDIR_IN), /* 15 */
+ GPIO_PIN_INFO_NO_MUX(25, UP_BOARD_PDIR_IN), /* 16 */
+ GPIO_PIN_INFO_NO_MUX(3, UP_BOARD_PDIR_OUT), /* 17 */
+ GPIO_PIN_INFO_NO_MUX(17, UP_BOARD_PDIR_OUT), /* 18 */
+ GPIO_PIN_INFO_NO_MUX(13, UP_BOARD_PDIR_OUT), /* 19 */
+ GPIO_PIN_INFO_NO_MUX(26, UP_BOARD_PDIR_IN), /* 20 */
+ GPIO_PIN_INFO_NO_MUX(27, UP_BOARD_PDIR_OUT), /* 21 */
+ GPIO_PIN_INFO_NO_MUX(5, UP_BOARD_PDIR_OUT), /* 22 */
+ GPIO_PIN_INFO_NO_MUX(18, UP_BOARD_PDIR_OUT), /* 23 */
+ GPIO_PIN_INFO_NO_MUX(19, UP_BOARD_PDIR_OUT), /* 24 */
+ GPIO_PIN_INFO_NO_MUX(20, UP_BOARD_PDIR_OUT), /* 25 */
+ GPIO_PIN_INFO_NO_MUX(14, UP_BOARD_PDIR_OUT), /* 26 */
+ GPIO_PIN_INFO_NO_MUX(4, UP_BOARD_PDIR_OUT), /* 27 */
+};
+
+/* SoC GPIO mapping for the 28 GPIO pins on the UP Board I/O header */
+static struct up_board_gpio_info up_board_gpios[] = {
+ SOC_GPIO(SOC_GC_SW, 33, 0), /* 0 */
+ SOC_GPIO(SOC_GC_SW, 37, 0), /* 1 */
+ SOC_GPIO(SOC_GC_SW, 32, 0), /* 2 */
+ SOC_GPIO(SOC_GC_SW, 35, 0), /* 3 */
+ SOC_GPIO(SOC_GC_E, 18, 0), /* 4 */
+ SOC_GPIO(SOC_GC_E, 21, 0), /* 5 */
+ SOC_GPIO(SOC_GC_E, 12, 0), /* 6 */
+ SOC_GPIO(SOC_GC_SE, 48, 0), /* 7 */
+ SOC_GPIO(SOC_GC_SE, 7, 0), /* 8 */
+ SOC_GPIO(SOC_GC_SE, 3, 0), /* 9 */
+ SOC_GPIO(SOC_GC_SE, 6, 0), /* 10 */
+ SOC_GPIO(SOC_GC_SE, 4, 0), /* 11 */
+ SOC_GPIO(SOC_GC_SE, 5, 0), /* 12 */
+ SOC_GPIO(SOC_GC_SE, 1, 0), /* 13 */
+ SOC_GPIO(SOC_GC_SW, 13, 0), /* 14 */
+ SOC_GPIO(SOC_GC_SW, 9, 0), /* 15 */
+ SOC_GPIO(SOC_GC_SW, 11, 0), /* 16 */
+ SOC_GPIO(SOC_GC_SW, 8, 0), /* 17 */
+ SOC_GPIO(SOC_GC_SW, 50, 0), /* 18 */
+ SOC_GPIO(SOC_GC_SW, 54, 0), /* 19 */
+ SOC_GPIO(SOC_GC_SW, 52, 0), /* 20 */
+ SOC_GPIO(SOC_GC_SW, 55, 0), /* 21 */
+ SOC_GPIO(SOC_GC_SE, 12, 0), /* 22 */
+ SOC_GPIO(SOC_GC_SE, 15, 0), /* 23 */
+ SOC_GPIO(SOC_GC_SE, 18, 0), /* 24 */
+ SOC_GPIO(SOC_GC_SE, 11, 0), /* 25 */
+ SOC_GPIO(SOC_GC_SE, 14, 0), /* 26 */
+ SOC_GPIO(SOC_GC_SE, 8, 0), /* 27 */
+};
+
+/* pinctrl descriptors for the 28 GPIO pins on the UP Board I/O header */
+static const struct pinctrl_pin_desc up_board_pinctrl_descs[] = {
+ PINCTRL_PIN(0, "I2C0_SDA"),
+ PINCTRL_PIN(1, "I2C0_SCL"),
+ PINCTRL_PIN(2, "I2C1_SDA"),
+ PINCTRL_PIN(3, "I2C1_SCL"),
+ PINCTRL_PIN(4, "ADC"),
+ PINCTRL_PIN(5, "GPIO5"),
+ PINCTRL_PIN(6, "GPIO6"),
+ PINCTRL_PIN(7, "SPI_CS1"),
+ PINCTRL_PIN(8, "SPI_CS0"),
+ PINCTRL_PIN(9, "SPI_MISO"),
+ PINCTRL_PIN(10, "SPI_MOSI"),
+ PINCTRL_PIN(11, "SPI_CLK"),
+ PINCTRL_PIN(12, "PWM0"),
+ PINCTRL_PIN(13, "PWM1"),
+ PINCTRL_PIN(14, "UART1_TX"),
+ PINCTRL_PIN(15, "UART1_RX"),
+ PINCTRL_PIN(16, "UART1_CTS"),
+ PINCTRL_PIN(17, "UART1_RTS"),
+ PINCTRL_PIN(18, "I2S_CLK"),
+ PINCTRL_PIN(19, "I2S_FRM"),
+ PINCTRL_PIN(20, "I2S_DIN"),
+ PINCTRL_PIN(21, "I2S_DOUT"),
+ PINCTRL_PIN(22, "GPIO22"),
+ PINCTRL_PIN(23, "GPIO23"),
+ PINCTRL_PIN(24, "GPIO24"),
+ PINCTRL_PIN(25, "GPIO25"),
+ PINCTRL_PIN(26, "GPIO26"),
+ PINCTRL_PIN(27, "GPIO27"),
+};
+
+static const unsigned int uart1_pins[] = { 14, 15, 16, 17 };
+static const unsigned int uart2_pins[] = { 25, 27 };
+static const unsigned int i2c0_pins[] = { 0, 1 };
+static const unsigned int i2c1_pins[] = { 2, 3 };
+static const unsigned int spi2_pins[] = { 8, 9, 10, 11 };
+static const unsigned int i2s2_pins[] = { 18, 19, 20, 21 };
+static const unsigned int pwm0_pins[] = { 12 };
+static const unsigned int pwm1_pins[] = { 13 };
+static const unsigned int adc0_pins[] = { 4 };
+
+static const struct up_board_pinctrl_group up_board_pinctrl_groups[] = {
+ PIN_GROUP("uart1_grp", uart1_pins),
+ PIN_GROUP("uart2_grp", uart2_pins),
+ PIN_GROUP("i2c0_grp", i2c0_pins),
+ PIN_GROUP("i2c1_grp", i2c1_pins),
+ PIN_GROUP("spi2_grp", spi2_pins),
+ PIN_GROUP("i2s2_grp", i2s2_pins),
+ PIN_GROUP("pwm0_grp", pwm0_pins),
+ PIN_GROUP("pwm1_grp", pwm1_pins),
+ PIN_GROUP("adc0_grp", adc0_pins),
+};
+
+static const char * const uart1_groups[] = { "uart1_grp" };
+static const char * const uart2_groups[] = { "uart2_grp" };
+static const char * const i2c0_groups[] = { "i2c0_grp" };
+static const char * const i2c1_groups[] = { "i2c1_grp" };
+static const char * const spi2_groups[] = { "spi2_grp" };
+static const char * const i2s2_groups[] = { "i2s2_grp" };
+static const char * const pwm0_groups[] = { "pwm0_grp" };
+static const char * const pwm1_groups[] = { "pwm1_grp" };
+static const char * const adc0_groups[] = { "adc0_grp" };
+
+static const struct up_board_pinctrl_function up_board_pinctrl_functions[] = {
+ FUNCTION("uart1", uart1_groups),
+ FUNCTION("uart2", uart2_groups),
+ FUNCTION("i2c0", i2c0_groups),
+ FUNCTION("i2c1", i2c1_groups),
+ FUNCTION("spi2", spi2_groups),
+ FUNCTION("i2s2", i2s2_groups),
+ FUNCTION("pwm0", pwm0_groups),
+ FUNCTION("pwm1", pwm1_groups),
+ FUNCTION("adc0", adc0_groups),
+};
+
+/* The CPLD controls the following 3 LEDs on the UP board */
+static struct up_board_led_info up_board_leds[] = {
+ { .cpld_offset = 31, .name = "upboard:yellow:", },
+ { .cpld_offset = 32, .name = "upboard:green:", },
+ { .cpld_offset = 33, .name = "upboard:red:", },
+};
+
+static struct up_board_pinctrl_pdata up_board_pinctrl_pdata = {
+ .cpld_info.cpld = &up_board_cpld,
+ .cpld_info.reg_set_bit = up_board_cpld_reg_set_bit,
+ .pins = up_board_pins,
+ .npin = ARRAY_SIZE(up_board_pins),
+ .descs = up_board_pinctrl_descs,
+ .ndesc = ARRAY_SIZE(up_board_pinctrl_descs),
+ .groups = up_board_pinctrl_groups,
+ .ngroup = ARRAY_SIZE(up_board_pinctrl_groups),
+ .functions = up_board_pinctrl_functions,
+ .nfunction = ARRAY_SIZE(up_board_pinctrl_functions),
+};
+
+static struct up_board_gpio_pdata up_board_gpio_pdata = {
+ .gpios = up_board_gpios,
+ .ngpio = ARRAY_SIZE(up_board_gpios),
+};
+
+static struct up_board_leds_pdata up_board_leds_pdata = {
+ .cpld_info.cpld = &up_board_cpld,
+ .cpld_info.reg_set_bit = up_board_cpld_reg_set_bit,
+ .leds = up_board_leds,
+ .nled = ARRAY_SIZE(up_board_leds),
+};
+
+/*
+ * On the UP board, the header pin level shifting and mux switching is
+ * controlled by a dedicated CPLD with proprietary firmware.
+ *
+ * The CPLD is responsible for connecting and translating 1.8V GPIO signals from
+ * the SoC to the 28 GPIO header pins at 3.3V, and for this it needs to be
+ * configured with direction (input/output) for each GPIO. In addition, it
+ * manages 3 mux switches (2 for I2C bus pins, 1 for ADC pin) which need to be
+ * configured on/off, and 3 LEDs. A register value is loaded into the CPLD to
+ * dynamically configure each of these.
+ */
+static int cpld_reg_update(struct up_board_cpld *cpld)
+{
+ u64 dir_reg_verify = 0;
+ int i;
+
+ /* Reset the CPLD internal counters */
+ gpiod_set_value(cpld->reset_gpio.soc_gpiod, 0);
+ gpiod_set_value(cpld->reset_gpio.soc_gpiod, 1);
+
+ /*
+ * Update the CPLD dir register
+ * data_in will be sampled on each rising edge of the strobe signal
+ */
+ for (i = cpld->dir_reg_size - 1; i >= 0; i--) {
+ gpiod_set_value(cpld->strobe_gpio.soc_gpiod, 0);
+ gpiod_set_value(cpld->data_in_gpio.soc_gpiod,
+ (cpld->dir_reg >> i) & 0x1);
+ gpiod_set_value(cpld->strobe_gpio.soc_gpiod, 1);
+ }
+
+ /*
+ * Read back and verify the value
+ * data_out will be set on each rising edge of the strobe signal
+ */
+ for (i = cpld->dir_reg_size - 1; i >= 0; i--) {
+ int data_out;
+
+ gpiod_set_value(cpld->strobe_gpio.soc_gpiod, 0);
+ gpiod_set_value(cpld->strobe_gpio.soc_gpiod, 1);
+ data_out = gpiod_get_value(cpld->data_out_gpio.soc_gpiod);
+ dir_reg_verify |= (u64)data_out << i;
+ }
+
+ if (dir_reg_verify != cpld->dir_reg) {
+ pr_err("CPLD verify error (expected: %llX, actual: %llX)\n",
+ cpld->dir_reg, dir_reg_verify);
+ return -EIO;
+ }
+
+ /* Issue a dummy STB cycle to latch the dir register updates */
+ gpiod_set_value(cpld->strobe_gpio.soc_gpiod, 0);
+ gpiod_set_value(cpld->strobe_gpio.soc_gpiod, 1);
+
+ return 0;
+}
+
+/**
+ * up_board_cpld_reg_set_bit() - update CPLD configuration
+ * @cpld: CPLD internal context info reference
+ * @offset: bit offset in CPLD register to set
+ * @value: boolean value to set in CPLD register bit selected by offset
+ *
+ * Return: Returns 0 if successful, or negative error value otherwise
+ */
+static int up_board_cpld_reg_set_bit(struct up_board_cpld *cpld,
+ unsigned int offset, int value)
+{
+ u64 old_regval;
+ int ret = 0;
+
+ spin_lock(&cpld->lock);
+
+ old_regval = cpld->dir_reg;
+
+ if (value)
+ cpld->dir_reg |= 1ULL << offset;
+ else
+ cpld->dir_reg &= ~(1ULL << offset);
+
+ /* Only update the CPLD register if it has changed */
+ if (cpld->dir_reg != old_regval)
+ ret = cpld_reg_update(cpld);
+
+ spin_unlock(&cpld->lock);
+
+ return ret;
+}
+
+static int up_gpiochip_match(struct gpio_chip *chip, void *data)
+{
+ return !strcmp(chip->label, data);
+}
+
+static int up_board_soc_gpio_setup(struct up_board_cpld *cpld,
+ struct up_board_gpio_info *gpio)
+{
+ gpio->soc_gc = gpiochip_find(gpio->soc_gc_name, up_gpiochip_match);
+ if (!gpio->soc_gc)
+ return -EPROBE_DEFER;
+
+ gpio->soc_gpio = gpio->soc_gc->base + gpio->soc_gc_offset;
+ gpio->soc_gpiod = gpio_to_desc(gpio->soc_gpio);
+ if (!gpio->soc_gpiod) {
+ dev_err(cpld->dev, "Failed to get descriptor for gpio %d\n",
+ gpio->soc_gpio);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int up_board_cpld_setup(struct up_board_cpld *cpld)
+{
+ struct up_board_gpio_info *cpld_gpios[] = {
+ &cpld->strobe_gpio,
+ &cpld->reset_gpio,
+ &cpld->data_in_gpio,
+ &cpld->data_out_gpio,
+ &cpld->oe_gpio,
+ };
+ int i, ret;
+
+ spin_lock_init(&cpld->lock);
+
+ /* Initialise the CPLD config input GPIOs as outputs, initially low */
+ for (i = 0; i < ARRAY_SIZE(cpld_gpios); i++) {
+ struct up_board_gpio_info *gpio = cpld_gpios[i];
+
+ ret = up_board_soc_gpio_setup(cpld, gpio);
+ if (ret)
+ return ret;
+
+ ret = devm_gpio_request_one(cpld->dev, gpio->soc_gpio,
+ gpio->soc_gpio_flags,
+ dev_name(cpld->dev));
+ if (ret)
+ return ret;
+ }
+
+ /* Load initial CPLD configuration (all pins set for GPIO input) */
+ ret = cpld_reg_update(cpld);
+ if (ret) {
+ dev_err(cpld->dev, "CPLD initialisation failed\n");
+ return ret;
+ }
+
+ /* Enable the CPLD outputs after a valid configuration has been set */
+ gpiod_set_value(cpld->oe_gpio.soc_gpiod, 1);
+
+ return 0;
+}
+
+static int up_board_setup(struct up_board_cpld *cpld,
+ struct up_board_gpio_pdata *gpio_pdata)
+{
+ size_t i;
+ int ret;
+
+ /* Ensure the GPIO pins are configured as inputs initially */
+ for (i = 0; i < gpio_pdata->ngpio; i++) {
+ struct up_board_gpio_info *gpio = &gpio_pdata->gpios[i];
+
+ ret = up_board_soc_gpio_setup(cpld, gpio);
+ if (ret)
+ return ret;
+
+ ret = gpiod_direction_input(gpio->soc_gpiod);
+ if (ret) {
+ dev_err(cpld->dev, "GPIO direction init failed\n");
+ return ret;
+ }
+ }
+
+ return up_board_cpld_setup(cpld);
+}
+
+static int up_board_cpld_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct up_board_cpld *cpld = &up_board_cpld;
+ int ret;
+
+ cpld->dev = dev;
+ ret = up_board_setup(cpld, &up_board_gpio_pdata);
+ if (ret)
+ return ret;
+
+ cpld->pinctrl_pdev =
+ platform_device_register_data(dev, "up-board-pinctrl",
+ PLATFORM_DEVID_NONE,
+ &up_board_pinctrl_pdata,
+ sizeof(up_board_pinctrl_pdata));
+ if (IS_ERR(cpld->pinctrl_pdev)) {
+ ret = PTR_ERR(cpld->pinctrl_pdev);
+ goto fail_register_pinctrl_pdev;
+ }
+
+ cpld->gpio_pdev =
+ platform_device_register_data(dev, "up-board-gpio",
+ PLATFORM_DEVID_NONE,
+ &up_board_gpio_pdata,
+ sizeof(up_board_gpio_pdata));
+ if (IS_ERR(cpld->gpio_pdev)) {
+ ret = PTR_ERR(cpld->gpio_pdev);
+ goto fail_register_gpio_pdev;
+ }
+
+ cpld->leds_pdev =
+ platform_device_register_data(dev, "up-board-leds",
+ PLATFORM_DEVID_NONE,
+ &up_board_leds_pdata,
+ sizeof(up_board_leds_pdata));
+ if (IS_ERR(cpld->leds_pdev)) {
+ ret = PTR_ERR(cpld->leds_pdev);
+ goto fail_register_leds_pdev;
+ }
+
+ return 0;
+
+fail_register_leds_pdev:
+ platform_device_unregister(cpld->gpio_pdev);
+fail_register_gpio_pdev:
+ platform_device_unregister(cpld->pinctrl_pdev);
+fail_register_pinctrl_pdev:
+
+ return ret;
+}
+
+static int up_board_cpld_remove(struct platform_device *pdev)
+{
+ struct up_board_cpld *cpld = &up_board_cpld;
+
+ platform_device_unregister(cpld->leds_pdev);
+ platform_device_unregister(cpld->gpio_pdev);
+ platform_device_unregister(cpld->pinctrl_pdev);
+
+ /* Disable the CPLD outputs */
+ gpiod_set_value(cpld->oe_gpio.soc_gpiod, 0);
+
+ return 0;
+}
+
+static struct platform_driver up_board_cpld_driver = {
+ .driver.name = "up-board-cpld",
+ .driver.owner = THIS_MODULE,
+ .probe = up_board_cpld_probe,
+ .remove = up_board_cpld_remove,
+};
+
+static int __init up_board_cpld_init(void)
+{
+ return platform_driver_register(&up_board_cpld_driver);
+}
+subsys_initcall(up_board_cpld_init);
+
+static void __exit up_board_cpld_exit(void)
+{
+ platform_driver_unregister(&up_board_cpld_driver);
+}
+module_exit(up_board_cpld_exit);
+
+MODULE_AUTHOR("Dan O'Donovan <[email protected]>");
+MODULE_DESCRIPTION("UP Board I/O Header CPLD driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:up-board-cpld");
diff --git a/drivers/platform/x86/up_board_cpld.h b/drivers/platform/x86/up_board_cpld.h
new file mode 100644
index 000000000..f635435d3
--- /dev/null
+++ b/drivers/platform/x86/up_board_cpld.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2016, Emutex Ltd. All rights reserved.
+ *
+ * Author: Dan O'Donovan <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _UP_BOARD_CPLD_H_
+#define _UP_BOARD_CPLD_H_
+
+/* Forward declaration to internal CPLD info structure */
+struct up_board_cpld;
+
+/**
+ * struct up_board_cpld_info - abstract interface for CPLD configuration
+ * @cpld: Opaque reference to internal CPLD info structure
+ * @reg_set_bit: Callback to update internal CPLD register bits
+ *
+ * Information passed to UP Board CPLD users to provide a method for updating
+ * the CPLD configuration register
+ */
+struct up_board_cpld_info {
+ struct up_board_cpld *cpld;
+ int (*reg_set_bit)(struct up_board_cpld *cpld,
+ unsigned int offset, int value);
+};
+
+#endif /* _UP_BOARD_CPLD_H_ */
diff --git a/drivers/platform/x86/up_board_gpio.c b/drivers/platform/x86/up_board_gpio.c
new file mode 100644
index 000000000..d49f41fff
--- /dev/null
+++ b/drivers/platform/x86/up_board_gpio.c
@@ -0,0 +1,254 @@
+/*
+ * UP Board I/O Header CPLD GPIO driver.
+ *
+ * Copyright (c) 2016, Emutex Ltd. All rights reserved.
+ *
+ * Author: Dan O'Donovan <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/gpio.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+
+#include "up_board_gpio.h"
+
+/* Internal context information for this driver */
+struct up_board_gpio {
+ struct up_board_gpio_pdata *pdata;
+ struct gpio_chip chip;
+};
+
+static irqreturn_t up_gpio_irq_handler(int irq, void *data)
+{
+ struct up_board_gpio_info *gpio = data;
+
+ generic_handle_irq(gpio->irq);
+ return IRQ_HANDLED;
+}
+
+static unsigned int up_gpio_irq_startup(struct irq_data *data)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
+ struct up_board_gpio *up_gpio = gpiochip_get_data(gc);
+ unsigned int offset = irqd_to_hwirq(data);
+ struct up_board_gpio_info *gpio = &up_gpio->pdata->gpios[offset];
+
+ return request_irq(gpio->soc_gpio_irq, up_gpio_irq_handler,
+ IRQF_ONESHOT, gc->label, gpio);
+}
+
+static void up_gpio_irq_shutdown(struct irq_data *data)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
+ struct up_board_gpio *up_gpio = gpiochip_get_data(gc);
+ unsigned int offset = irqd_to_hwirq(data);
+ struct up_board_gpio_info *gpio = &up_gpio->pdata->gpios[offset];
+
+ free_irq(gpio->soc_gpio_irq, gpio);
+}
+
+static struct irq_chip up_gpio_irqchip = {
+ .irq_startup = up_gpio_irq_startup,
+ .irq_shutdown = up_gpio_irq_shutdown,
+ .irq_enable = irq_chip_enable_parent,
+ .irq_disable = irq_chip_disable_parent,
+ .irq_mask = irq_chip_mask_parent,
+ .irq_unmask = irq_chip_unmask_parent,
+ .irq_ack = irq_chip_ack_parent,
+ .irq_set_type = irq_chip_set_type_parent,
+};
+
+static int up_gpio_dir_in(struct gpio_chip *gc, unsigned int offset)
+{
+ struct up_board_gpio *up_gpio = gpiochip_get_data(gc);
+ struct up_board_gpio_info *gpio = &up_gpio->pdata->gpios[offset];
+ int ret;
+
+ ret = gpiod_direction_input(gpio->soc_gpiod);
+ if (ret)
+ return ret;
+
+ return pinctrl_gpio_direction_input(gc->base + offset);
+}
+
+static int up_gpio_dir_out(struct gpio_chip *gc, unsigned int offset, int value)
+{
+ struct up_board_gpio *up_gpio = gpiochip_get_data(gc);
+ struct up_board_gpio_info *gpio = &up_gpio->pdata->gpios[offset];
+ int ret;
+
+ ret = pinctrl_gpio_direction_output(gc->base + offset);
+ if (ret)
+ return ret;
+
+ return gpiod_direction_output(gpio->soc_gpiod, value);
+}
+
+static int up_gpio_get_dir(struct gpio_chip *gc, unsigned int offset)
+{
+ struct up_board_gpio *up_gpio = gpiochip_get_data(gc);
+ struct up_board_gpio_info *gpio = &up_gpio->pdata->gpios[offset];
+
+ return gpiod_get_direction(gpio->soc_gpiod);
+}
+
+static int up_gpio_request(struct gpio_chip *gc, unsigned int offset)
+{
+ struct up_board_gpio *up_gpio = gpiochip_get_data(gc);
+ struct up_board_gpio_info *gpio = &up_gpio->pdata->gpios[offset];
+ int ret;
+
+ ret = pinctrl_gpio_request(gc->base + offset);
+ if (ret)
+ return ret;
+
+ if (gpiod_get_direction(gpio->soc_gpiod))
+ ret = pinctrl_gpio_direction_input(gc->base + offset);
+ else
+ ret = pinctrl_gpio_direction_output(gc->base + offset);
+ if (ret)
+ return ret;
+
+ return gpio_request(gpio->soc_gpio, gc->label);
+}
+
+static void up_gpio_free(struct gpio_chip *gc, unsigned int offset)
+{
+ struct up_board_gpio *up_gpio = gpiochip_get_data(gc);
+ struct up_board_gpio_info *gpio = &up_gpio->pdata->gpios[offset];
+
+ pinctrl_gpio_free(gc->base + offset);
+ gpio_free(gpio->soc_gpio);
+}
+
+static int up_gpio_get(struct gpio_chip *gc, unsigned int offset)
+{
+ struct up_board_gpio *up_gpio = gpiochip_get_data(gc);
+ struct up_board_gpio_info *gpio = &up_gpio->pdata->gpios[offset];
+
+ return gpiod_get_value(gpio->soc_gpiod);
+}
+
+static void up_gpio_set(struct gpio_chip *gc, unsigned int offset, int value)
+{
+ struct up_board_gpio *up_gpio = gpiochip_get_data(gc);
+ struct up_board_gpio_info *gpio = &up_gpio->pdata->gpios[offset];
+
+ gpiod_set_value(gpio->soc_gpiod, value);
+}
+
+static struct gpio_chip up_gpio_chip = {
+ .owner = THIS_MODULE,
+ .request = up_gpio_request,
+ .free = up_gpio_free,
+ .get_direction = up_gpio_get_dir,
+ .direction_input = up_gpio_dir_in,
+ .direction_output = up_gpio_dir_out,
+ .get = up_gpio_get,
+ .set = up_gpio_set,
+};
+
+static int up_board_gpio_setup(struct up_board_gpio *up_gpio)
+{
+ struct up_board_gpio_pdata *pdata = up_gpio->pdata;
+ size_t i;
+
+ for (i = 0; i < pdata->ngpio; i++) {
+ struct up_board_gpio_info *gpio = &pdata->gpios[i];
+ struct irq_data *irq_data;
+
+ /*
+ * Create parent linkage with SoC GPIO IRQs to simplify
+ * IRQ handling by enabling use of irq_chip_*_parent()
+ * functions
+ */
+ gpio->soc_gpio_irq = gpiod_to_irq(gpio->soc_gpiod);
+ gpio->irq = irq_find_mapping(up_gpio->chip.irq.domain, i);
+ irq_set_parent(gpio->irq, gpio->soc_gpio_irq);
+ irq_data = irq_get_irq_data(gpio->irq);
+ irq_data->parent_data = irq_get_irq_data(gpio->soc_gpio_irq);
+ }
+
+ return 0;
+}
+
+static int up_board_gpio_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct up_board_gpio_pdata *pdata = dev_get_platdata(dev);
+ struct up_board_gpio *up_gpio;
+ int ret;
+
+ if (!pdata)
+ return -EINVAL;
+
+ up_gpio = devm_kzalloc(dev, sizeof(*up_gpio), GFP_KERNEL);
+ if (!up_gpio)
+ return -ENOMEM;
+
+ up_gpio->pdata = pdata;
+ up_gpio->chip = up_gpio_chip;
+ up_gpio->chip.parent = dev;
+ up_gpio->chip.ngpio = pdata->ngpio;
+ up_gpio->chip.label = dev_name(dev);
+
+ ret = devm_gpiochip_add_data(dev, &up_gpio->chip, up_gpio);
+ if (ret) {
+ dev_err(dev, "failed to add gpio chip: %d\n", ret);
+ return ret;
+ }
+
+ ret = gpiochip_add_pin_range(&up_gpio->chip, "up-board-pinctrl", 0, 0,
+ pdata->ngpio);
+ if (ret) {
+ dev_err(dev, "failed to add GPIO pin range\n");
+ return ret;
+ }
+
+ up_gpio_irqchip.name = up_gpio->chip.label;
+ ret = gpiochip_irqchip_add(&up_gpio->chip, &up_gpio_irqchip, 0,
+ handle_simple_irq, IRQ_TYPE_NONE);
+ if (ret) {
+ dev_err(dev, "failed to add IRQ chip\n");
+ goto fail_irqchip_add;
+ }
+
+ ret = up_board_gpio_setup(up_gpio);
+ if (ret)
+ goto fail_gpio_setup;
+
+ return 0;
+
+fail_gpio_setup:
+fail_irqchip_add:
+ gpiochip_remove_pin_ranges(&up_gpio->chip);
+
+ return ret;
+}
+
+static struct platform_driver up_board_gpio_driver = {
+ .driver.name = "up-board-gpio",
+ .driver.owner = THIS_MODULE,
+ .probe = up_board_gpio_probe,
+};
+
+module_platform_driver(up_board_gpio_driver);
+
+MODULE_AUTHOR("Dan O'Donovan <[email protected]>");
+MODULE_DESCRIPTION("UP Board I/O Header CPLD GPIO driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:up-board-gpio");
diff --git a/drivers/platform/x86/up_board_gpio.h b/drivers/platform/x86/up_board_gpio.h
new file mode 100644
index 000000000..ada7d2e5a
--- /dev/null
+++ b/drivers/platform/x86/up_board_gpio.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2016, Emutex Ltd. All rights reserved.
+ *
+ * Author: Dan O'Donovan <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _UP_BOARD_GPIO_H_
+#define _UP_BOARD_GPIO_H_
+
+/**
+ * struct up_board_gpio_info - information for an UP Board GPIO pin
+ * @soc_gc_name: Device name for corresponding SoC GPIO chip
+ * @soc_gc_offset: GPIO chip offset of corresponding SoC GPIO pin
+ * @soc_gc: SoC GPIO chip reference
+ * @soc_gpiod: SoC GPIO descriptor reference
+ * @soc_gpio: SoC GPIO assigned pin number
+ * @soc_gpio_irq: SoC GPIO assigned IRQ number
+ * @soc_gpio_flags: Optional GPIO flags to apply to SoC GPIO
+ * @irq: Assigned IRQ number for this GPIO pin
+ *
+ * Information for a single GPIO pin on the UP Board I/O header, including
+ * details of the corresponding SoC GPIO mapped to this I/O header GPIO.
+ */
+struct up_board_gpio_info {
+ char *soc_gc_name;
+ unsigned int soc_gc_offset;
+ struct gpio_chip *soc_gc;
+ struct gpio_desc *soc_gpiod;
+ int soc_gpio;
+ int soc_gpio_irq;
+ int soc_gpio_flags;
+ int irq;
+};
+
+/**
+ * struct up_board_gpio_pdata - platform driver data
+ * @gpios: Array of GPIO information structures.
+ * @ngpio: Number of entries in gpios array.
+ *
+ * Platform data provided to UP Board CPLD GPIO platform device driver.
+ * Provides information for each GPIO pin on the UP Board I/O header.
+ */
+struct up_board_gpio_pdata {
+ struct up_board_gpio_info *gpios;
+ size_t ngpio;
+};
+
+#endif /* _UP_BOARD_GPIO_H_ */
diff --git a/drivers/platform/x86/up_board_leds.c b/drivers/platform/x86/up_board_leds.c
new file mode 100644
index 000000000..41864754b
--- /dev/null
+++ b/drivers/platform/x86/up_board_leds.c
@@ -0,0 +1,85 @@
+/*
+ * UP Board CPLD LEDs driver.
+ *
+ * Copyright (c) 2016, Emutex Ltd. All rights reserved.
+ *
+ * Author: Javier Arteaga <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/leds.h>
+#include <linux/platform_device.h>
+
+#include "up_board_leds.h"
+
+/* Internal context information for this driver */
+struct up_board_led {
+ struct up_board_leds_pdata *pdata;
+ unsigned int offset;
+ const char *name;
+ struct led_classdev cdev;
+};
+
+static void up_led_brightness_set(struct led_classdev *cdev,
+ enum led_brightness value)
+{
+ struct up_board_led *led = container_of(cdev,
+ struct up_board_led,
+ cdev);
+ struct up_board_cpld_info *cpld_info = &led->pdata->cpld_info;
+
+ cpld_info->reg_set_bit(cpld_info->cpld, led->offset, value != LED_OFF);
+}
+
+static int up_board_leds_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct up_board_leds_pdata *pdata = dev_get_platdata(dev);
+ struct up_board_led *up_led;
+ int ret = 0;
+ size_t i;
+
+ for (i = 0; i < pdata->nled; i++) {
+ struct up_board_led_info *led_info = &pdata->leds[i];
+
+ up_led = devm_kzalloc(dev, sizeof(*up_led), GFP_KERNEL);
+ if (!up_led)
+ return -ENOMEM;
+
+ up_led->pdata = pdata;
+ up_led->offset = led_info->cpld_offset;
+ up_led->cdev.brightness_set = up_led_brightness_set;
+ up_led->cdev.name = led_info->name;
+
+ ret = devm_led_classdev_register(dev, &up_led->cdev);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct platform_driver up_board_leds_driver = {
+ .driver.name = "up-board-leds",
+ .driver.owner = THIS_MODULE,
+ .probe = up_board_leds_probe,
+};
+
+module_platform_driver(up_board_leds_driver);
+
+MODULE_AUTHOR("Javier Arteaga <[email protected]>");
+MODULE_DESCRIPTION("UP Board LEDs driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:up-board-leds");
diff --git a/drivers/platform/x86/up_board_leds.h b/drivers/platform/x86/up_board_leds.h
new file mode 100644
index 000000000..473b1ad74
--- /dev/null
+++ b/drivers/platform/x86/up_board_leds.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2016, Emutex Ltd. All rights reserved.
+ *
+ * Author: Dan O'Donovan <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _UP_BOARD_LED_H_
+#define _UP_BOARD_LED_H_
+
+#include "up_board_cpld.h"
+
+/**
+ * struct up_board_led_info - information for an UP Board LED
+ * @name: LED name
+ * @cpld_offset: CPLD register bit offset for LED control
+ *
+ * Information for a single CPLD-controlled LED on the UP Board.
+ */
+struct up_board_led_info {
+ const char *name;
+ unsigned int cpld_offset;
+};
+
+/**
+ * struct up_board_leds_pdata - platform driver data
+ * @cpld_info: CPLD configuration interface information
+ * @leds: Array of LED information structures
+ * @nled: Number of entries in leds array
+ *
+ * Platform data provided to UP Board CPLD LEDs platform device driver.
+ * Provides information for each CPLD-controlled LED on the UP Board.
+ */
+struct up_board_leds_pdata {
+ struct up_board_cpld_info cpld_info;
+ struct up_board_led_info *leds;
+ size_t nled;
+};
+
+#endif /* _UP_BOARD_LED_H_ */
diff --git a/drivers/platform/x86/up_board_pinctrl.c b/drivers/platform/x86/up_board_pinctrl.c
new file mode 100644
index 000000000..be958377d
--- /dev/null
+++ b/drivers/platform/x86/up_board_pinctrl.c
@@ -0,0 +1,285 @@
+/*
+ * UP Board I/O Header CPLD Pin Control driver.
+ *
+ * Copyright (c) 2016, Emutex Ltd. All rights reserved.
+ *
+ * Author: Dan O'Donovan <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/platform_device.h>
+
+#include "up_board_pinctrl.h"
+
+/* Internal context information for this driver */
+struct up_board_pinctrl {
+ struct up_board_pinctrl_pdata *pdata;
+ struct pinctrl_desc pctldesc;
+ struct pinctrl_dev *pctldev;
+};
+
+static int up_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct up_board_pinctrl *up_pinctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ return up_pinctrl->pdata->ngroup;
+}
+
+static const char *up_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned int group)
+{
+ struct up_board_pinctrl *up_pinctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ return up_pinctrl->pdata->groups[group].name;
+}
+
+static int up_get_group_pins(struct pinctrl_dev *pctldev, unsigned int group,
+ const unsigned int **pins, unsigned int *npins)
+{
+ struct up_board_pinctrl *up_pinctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ *pins = up_pinctrl->pdata->groups[group].pins;
+ *npins = up_pinctrl->pdata->groups[group].npin;
+
+ return 0;
+}
+
+static const struct pinctrl_ops up_pinctrl_ops = {
+ .get_groups_count = up_get_groups_count,
+ .get_group_name = up_get_group_name,
+ .get_group_pins = up_get_group_pins,
+};
+
+static int up_get_functions_count(struct pinctrl_dev *pctldev)
+{
+ struct up_board_pinctrl *up_pinctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ return up_pinctrl->pdata->nfunction;
+}
+
+static const char *up_get_function_name(struct pinctrl_dev *pctldev,
+ unsigned int function)
+{
+ struct up_board_pinctrl *up_pinctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ return up_pinctrl->pdata->functions[function].name;
+}
+
+static int up_get_function_groups(struct pinctrl_dev *pctldev,
+ unsigned int function,
+ const char * const **groups,
+ unsigned int * const ngroups)
+{
+ struct up_board_pinctrl *up_pinctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = up_pinctrl->pdata->functions[function].groups;
+ *ngroups = up_pinctrl->pdata->functions[function].ngroup;
+
+ return 0;
+}
+
+static int up_pinmux_set_mux(struct pinctrl_dev *pctldev, unsigned int function,
+ unsigned int group)
+{
+ struct up_board_pinctrl *up_pinctrl = pinctrl_dev_get_drvdata(pctldev);
+ struct up_board_pinctrl_pdata *pdata = up_pinctrl->pdata;
+ struct up_board_cpld_info *cpld_info = &up_pinctrl->pdata->cpld_info;
+ const struct up_board_pinctrl_group *grp = &pdata->groups[group];
+ int i, ret;
+
+ for (i = 0; i < grp->npin; i++) {
+ int offset = grp->pins[i];
+ struct up_board_pin_info *pin = &pdata->pins[offset];
+
+ if (pin->func_dir != UP_BOARD_PDIR_NONE) {
+ ret = cpld_info->reg_set_bit(cpld_info->cpld,
+ pin->dir_ctrl_offset,
+ pin->func_dir);
+ if (ret)
+ return ret;
+ }
+ if (pin->mux_ctrl_offset != UP_BOARD_UNASSIGNED) {
+ ret = cpld_info->reg_set_bit(cpld_info->cpld,
+ pin->mux_ctrl_offset,
+ UP_BOARD_PMUX_FUNC);
+ if (ret)
+ return ret;
+ }
+ pin->func_enabled = true;
+ }
+
+ return 0;
+}
+
+static int up_gpio_set_direction(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int offset, bool input)
+{
+ struct up_board_pinctrl *up_pinctrl = pinctrl_dev_get_drvdata(pctldev);
+ struct up_board_pinctrl_pdata *pdata = up_pinctrl->pdata;
+ struct up_board_cpld_info *cpld_info = &up_pinctrl->pdata->cpld_info;
+ struct up_board_pin_info *pin = &pdata->pins[offset];
+ int dir = input ? UP_BOARD_PDIR_IN : UP_BOARD_PDIR_OUT;
+
+ return cpld_info->reg_set_bit(cpld_info->cpld,
+ pin->dir_ctrl_offset,
+ dir);
+}
+
+static int up_gpio_request_enable(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int offset)
+{
+ struct up_board_pinctrl *up_pinctrl = pinctrl_dev_get_drvdata(pctldev);
+ struct up_board_pinctrl_pdata *pdata = up_pinctrl->pdata;
+ struct up_board_cpld_info *cpld_info = &up_pinctrl->pdata->cpld_info;
+ struct up_board_pin_info *pin = &pdata->pins[offset];
+ int ret;
+
+ if (pin->mux_ctrl_offset != UP_BOARD_UNASSIGNED) {
+ ret = cpld_info->reg_set_bit(cpld_info->cpld,
+ pin->mux_ctrl_offset,
+ UP_BOARD_PMUX_GPIO);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static void up_gpio_disable_free(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int offset)
+{
+ struct up_board_pinctrl *up_pinctrl = pinctrl_dev_get_drvdata(pctldev);
+ struct up_board_pinctrl_pdata *pdata = up_pinctrl->pdata;
+ struct up_board_cpld_info *cpld_info = &up_pinctrl->pdata->cpld_info;
+ struct up_board_pin_info *pin = &pdata->pins[offset];
+
+ if (pin->func_enabled) {
+ if (pin->func_dir != UP_BOARD_PDIR_NONE) {
+ cpld_info->reg_set_bit(cpld_info->cpld,
+ pin->dir_ctrl_offset,
+ pin->func_dir);
+ }
+ if (pin->mux_ctrl_offset != UP_BOARD_UNASSIGNED) {
+ cpld_info->reg_set_bit(cpld_info->cpld,
+ pin->mux_ctrl_offset,
+ UP_BOARD_PMUX_FUNC);
+ }
+ }
+}
+
+static const struct pinmux_ops up_pinmux_ops = {
+ .get_functions_count = up_get_functions_count,
+ .get_function_name = up_get_function_name,
+ .get_function_groups = up_get_function_groups,
+ .set_mux = up_pinmux_set_mux,
+ .gpio_request_enable = up_gpio_request_enable,
+ .gpio_disable_free = up_gpio_disable_free,
+ .gpio_set_direction = up_gpio_set_direction,
+};
+
+static int up_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *config)
+{
+ return -ENOTSUPP;
+}
+
+static int up_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *configs, unsigned int nconfigs)
+{
+ return 0;
+}
+
+static const struct pinconf_ops up_pinconf_ops = {
+ .is_generic = true,
+ .pin_config_set = up_config_set,
+ .pin_config_get = up_config_get,
+};
+
+static struct pinctrl_desc up_pinctrl_desc = {
+ .owner = THIS_MODULE,
+ .pctlops = &up_pinctrl_ops,
+ .pmxops = &up_pinmux_ops,
+ .confops = &up_pinconf_ops,
+};
+
+static int up_board_pinctrl_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct up_board_pinctrl_pdata *pdata = dev_get_platdata(dev);
+ struct up_board_pinctrl *up_pinctrl;
+
+ if (!pdata)
+ return -EINVAL;
+
+ up_pinctrl = devm_kzalloc(dev, sizeof(*up_pinctrl), GFP_KERNEL);
+ if (!up_pinctrl)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, up_pinctrl);
+
+ up_pinctrl->pdata = pdata;
+ up_pinctrl->pctldesc = up_pinctrl_desc;
+ up_pinctrl->pctldesc.pins = pdata->descs;
+ up_pinctrl->pctldesc.npins = pdata->ndesc;
+ up_pinctrl->pctldesc.name = dev_name(dev);
+ up_pinctrl->pctldev = pinctrl_register(&up_pinctrl->pctldesc,
+ dev, up_pinctrl);
+ if (IS_ERR(up_pinctrl->pctldev)) {
+ dev_err(dev, "failed to register pinctrl driver\n");
+ return PTR_ERR(up_pinctrl->pctldev);
+ }
+
+ return 0;
+}
+
+static int up_board_pinctrl_remove(struct platform_device *pdev)
+{
+ struct up_board_pinctrl *up_pinctrl = platform_get_drvdata(pdev);
+
+ pinctrl_unregister(up_pinctrl->pctldev);
+
+ return 0;
+}
+
+static struct platform_driver up_board_pinctrl_driver = {
+ .driver.name = "up-board-pinctrl",
+ .driver.owner = THIS_MODULE,
+ .probe = up_board_pinctrl_probe,
+ .remove = up_board_pinctrl_remove,
+};
+
+static int __init up_board_pinctrl_init(void)
+{
+ return platform_driver_register(&up_board_pinctrl_driver);
+}
+subsys_initcall(up_board_pinctrl_init);
+
+static void __exit up_board_pinctrl_exit(void)
+{
+ platform_driver_unregister(&up_board_pinctrl_driver);
+}
+module_exit(up_board_pinctrl_exit);
+
+MODULE_AUTHOR("Dan O'Donovan <[email protected]>");
+MODULE_DESCRIPTION("UP Board I/O Header CPLD Pin Control driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:up-board-pinctrl");
diff --git a/drivers/platform/x86/up_board_pinctrl.h b/drivers/platform/x86/up_board_pinctrl.h
new file mode 100644
index 000000000..ce46886f2
--- /dev/null
+++ b/drivers/platform/x86/up_board_pinctrl.h
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2016, Emutex Ltd. All rights reserved.
+ *
+ * Author: Dan O'Donovan <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _UP_BOARD_PINCTRL_H_
+#define _UP_BOARD_PINCTRL_H_
+
+#include <linux/pinctrl/pinctrl.h>
+
+#include "up_board_cpld.h"
+
+#define UP_BOARD_PDIR_NONE -1
+#define UP_BOARD_PDIR_OUT 0
+#define UP_BOARD_PDIR_IN 1
+
+#define UP_BOARD_PMUX_GPIO 0
+#define UP_BOARD_PMUX_FUNC 1
+
+#define UP_BOARD_UNASSIGNED -1
+
+/**
+ * struct up_board_pinctrl_group - information for a single pinctrl group
+ * @name: group name
+ * @pins: array of pins associated with this group
+ * @npin: size of pins array
+ */
+struct up_board_pinctrl_group {
+ const char *name;
+ const unsigned int *pins;
+ size_t npin;
+};
+
+/**
+ * struct up_board_pinctrl_function - information for a single pinctrl function
+ * @name: function name
+ * @groups: array of groups associated with this function
+ * @ngroup: size of groups array
+ */
+struct up_board_pinctrl_function {
+ const char *name;
+ const char * const *groups;
+ size_t ngroup;
+};
+
+/**
+ * struct up_board_pin_info - information for each UP Board GPIO pin
+ * @dir_ctrl_offset: CPLD register bit offset for pin direction control
+ * @mux_ctrl_offset: CPLD register bit offset for pin mux control
+ * @func_dir: Pin dir to set when alternate pin function is selected
+ * @func_enabled: Flag to indicate if alternate pin function is enabled
+ *
+ * Information for a single GPIO pin on the UP Board I/O header, including
+ * details of CPLD parameters for managing pin direction and function selection.
+ */
+struct up_board_pin_info {
+ int dir_ctrl_offset;
+ int mux_ctrl_offset;
+ int func_dir;
+ bool func_enabled;
+};
+
+/**
+ * struct up_board_pinctrl_pdata - platform driver data
+ * @cpld_info: CPLD configuration interface information
+ * @pins: Array of pin information structures
+ * @npin: Number of entries in pins array
+ * @descs: Array of pinctrl pin descriptors
+ * @ndesc: Number of entries in pin_descs array
+ * @groups: Array of pin groups
+ * @ngroup: Number of entries in groups array
+ * @functions: Array of pin functions
+ * @nfunction: Number of entries in functions array
+ *
+ * Platform data provided to UP Board CPLD pinctrl platform device driver.
+ * Provides information for each GPIO pin on the UP Board I/O header.
+ */
+struct up_board_pinctrl_pdata {
+ struct up_board_cpld_info cpld_info;
+ struct up_board_pin_info *pins;
+ size_t npin;
+ const struct pinctrl_pin_desc *descs;
+ size_t ndesc;
+ const struct up_board_pinctrl_group *groups;
+ size_t ngroup;
+ const struct up_board_pinctrl_function *functions;
+ size_t nfunction;
+};
+
+#endif /* _UP_BOARD_PINCTRL_H_ */
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment