[PATCH 3/4 v2] pinctrl: add abx500 pinctrl driver core
From: Linus Walleij
Date: Mon Jan 21 2013 - 08:02:32 EST
From: Patrice Chotard <patrice.chotard@xxxxxx>
This adds the AB8500 core driver, which will be utilized by
the follow-on drivers for different ABx500 variants.
Sselect the driver from the DBX500_SOC, as this chip is
powering and clocking that SoC.
Cc: Samuel Ortiz <sameo@xxxxxxxxxxxxxxx>
Signed-off-by: Patrice Chotard <patrice.chotard@xxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
ChangeLog v1->v2:
- Make abx500_gpio_get() call abx500_gpio_get_bit()
- Make abx500_gpio_request_enable() use abx500_set_mode()
and as part of this define the way that different GPIO
pins are set into GPIO mode in the soc structure.
- Add clarifying comments for the "pullud" thing that is
just supported in some chip variants.
- Add setup functions as part of each driver instead of
open-coding them up front in the first patch.
- Put FIXME into one comment
- Skip setting drvdata to NULL.
- Cut kfree() on devm_* allocated object.
- Still request ACK from Samuel Ortiz
---
arch/arm/mach-ux500/Kconfig | 1 +
arch/arm/mach-ux500/board-mop500.c | 19 +-
drivers/pinctrl/Kconfig | 7 +
drivers/pinctrl/Makefile | 1 +
drivers/pinctrl/pinctrl-abx500.c | 1233 ++++++++++++++++++++++++++++++++
drivers/pinctrl/pinctrl-abx500.h | 180 +++++
include/linux/mfd/abx500/ab8500-gpio.h | 15 +-
include/linux/mfd/abx500/ab8500.h | 2 +-
8 files changed, 1437 insertions(+), 21 deletions(-)
create mode 100644 drivers/pinctrl/pinctrl-abx500.c
create mode 100644 drivers/pinctrl/pinctrl-abx500.h
diff --git a/arch/arm/mach-ux500/Kconfig b/arch/arm/mach-ux500/Kconfig
index 5dea906..2c090d7 100644
--- a/arch/arm/mach-ux500/Kconfig
+++ b/arch/arm/mach-ux500/Kconfig
@@ -11,6 +11,7 @@ config UX500_SOC_COMMON
select COMMON_CLK
select PINCTRL
select PINCTRL_NOMADIK
+ select PINCTRL_ABX500
select PL310_ERRATA_753970 if CACHE_PL310
config UX500_SOC_DB8500
diff --git a/arch/arm/mach-ux500/board-mop500.c b/arch/arm/mach-ux500/board-mop500.c
index d453522..b6f14ee 100644
--- a/arch/arm/mach-ux500/board-mop500.c
+++ b/arch/arm/mach-ux500/board-mop500.c
@@ -90,26 +90,9 @@ static struct platform_device snowball_gpio_en_3v3_regulator_dev = {
},
};
-static struct ab8500_gpio_platform_data ab8500_gpio_pdata = {
+static struct abx500_gpio_platform_data ab8500_gpio_pdata = {
.gpio_base = MOP500_AB8500_PIN_GPIO(1),
.irq_base = MOP500_AB8500_VIR_GPIO_IRQ_BASE,
- /* config_reg is the initial configuration of ab8500 pins.
- * The pins can be configured as GPIO or alt functions based
- * on value present in GpioSel1 to GpioSel6 and AlternatFunction
- * register. This is the array of 7 configuration settings.
- * One has to compile time decide these settings. Below is the
- * explanation of these setting
- * GpioSel1 = 0x00 => Pins GPIO1 to GPIO8 are not used as GPIO
- * GpioSel2 = 0x1E => Pins GPIO10 to GPIO13 are configured as GPIO
- * GpioSel3 = 0x80 => Pin GPIO24 is configured as GPIO
- * GpioSel4 = 0x01 => Pin GPIo25 is configured as GPIO
- * GpioSel5 = 0x7A => Pins GPIO34, GPIO36 to GPIO39 are conf as GPIO
- * GpioSel6 = 0x00 => Pins GPIO41 & GPIo42 are not configured as GPIO
- * AlternaFunction = 0x00 => If Pins GPIO10 to 13 are not configured
- * as GPIO then this register selectes the alternate fucntions
- */
- .config_reg = {0x00, 0x1E, 0x80, 0x01,
- 0x7A, 0x00, 0x00},
};
/* ab8500-codec */
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 881ddcd..ba3038c 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -26,6 +26,13 @@ config DEBUG_PINCTRL
help
Say Y here to add some extra checks and diagnostics to PINCTRL calls.
+config PINCTRL_ABX500
+ bool "ST-Ericsson ABx500 family Mixed Signal Circuit gpio functions"
+ depends on AB8500_CORE
+ select GENERIC_PINCONF
+ help
+ Select this to enable the ABx500 family IC GPIO driver
+
config PINCTRL_AT91
bool "AT91 pinctrl driver"
depends on OF
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index e9ad8c3..ead4fa7 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -9,6 +9,7 @@ ifeq ($(CONFIG_OF),y)
obj-$(CONFIG_PINCTRL) += devicetree.o
endif
obj-$(CONFIG_GENERIC_PINCONF) += pinconf-generic.o
+obj-$(CONFIG_PINCTRL_ABX500) += pinctrl-abx500.o
obj-$(CONFIG_PINCTRL_AT91) += pinctrl-at91.o
obj-$(CONFIG_PINCTRL_BCM2835) += pinctrl-bcm2835.o
obj-$(CONFIG_PINCTRL_IMX) += pinctrl-imx.o
diff --git a/drivers/pinctrl/pinctrl-abx500.c b/drivers/pinctrl/pinctrl-abx500.c
new file mode 100644
index 0000000..26abfd8
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-abx500.c
@@ -0,0 +1,1233 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2013
+ *
+ * Author: Patrice Chotard <patrice.chotard@xxxxxx>
+ * License terms: GNU General Public License (GPL) version 2
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/bitops.h>
+#include <linux/mfd/abx500.h>
+#include <linux/mfd/abx500/ab8500.h>
+#include <linux/mfd/abx500/ab8500-gpio.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+
+#include "pinctrl-abx500.h"
+
+/*
+ * The AB9540 and AB8540 GPIO support are extended versions
+ * of the AB8500 GPIO support.
+ * The AB9540 supports an additional (7th) register so that
+ * more GPIO may be configured and used.
+ * The AB8540 supports 4 new gpios (GPIOx_VBAT) that have
+ * internal pull-up and pull-down capabilities.
+ */
+
+/*
+ * GPIO registers offset
+ * Bank: 0x10
+ */
+#define AB8500_GPIO_SEL1_REG 0x00
+#define AB8500_GPIO_SEL2_REG 0x01
+#define AB8500_GPIO_SEL3_REG 0x02
+#define AB8500_GPIO_SEL4_REG 0x03
+#define AB8500_GPIO_SEL5_REG 0x04
+#define AB8500_GPIO_SEL6_REG 0x05
+#define AB9540_GPIO_SEL7_REG 0x06
+
+#define AB8500_GPIO_DIR1_REG 0x10
+#define AB8500_GPIO_DIR2_REG 0x11
+#define AB8500_GPIO_DIR3_REG 0x12
+#define AB8500_GPIO_DIR4_REG 0x13
+#define AB8500_GPIO_DIR5_REG 0x14
+#define AB8500_GPIO_DIR6_REG 0x15
+#define AB9540_GPIO_DIR7_REG 0x16
+
+#define AB8500_GPIO_OUT1_REG 0x20
+#define AB8500_GPIO_OUT2_REG 0x21
+#define AB8500_GPIO_OUT3_REG 0x22
+#define AB8500_GPIO_OUT4_REG 0x23
+#define AB8500_GPIO_OUT5_REG 0x24
+#define AB8500_GPIO_OUT6_REG 0x25
+#define AB9540_GPIO_OUT7_REG 0x26
+
+#define AB8500_GPIO_PUD1_REG 0x30
+#define AB8500_GPIO_PUD2_REG 0x31
+#define AB8500_GPIO_PUD3_REG 0x32
+#define AB8500_GPIO_PUD4_REG 0x33
+#define AB8500_GPIO_PUD5_REG 0x34
+#define AB8500_GPIO_PUD6_REG 0x35
+#define AB9540_GPIO_PUD7_REG 0x36
+
+#define AB8500_GPIO_IN1_REG 0x40
+#define AB8500_GPIO_IN2_REG 0x41
+#define AB8500_GPIO_IN3_REG 0x42
+#define AB8500_GPIO_IN4_REG 0x43
+#define AB8500_GPIO_IN5_REG 0x44
+#define AB8500_GPIO_IN6_REG 0x45
+#define AB9540_GPIO_IN7_REG 0x46
+#define AB8540_GPIO_VINSEL_REG 0x47
+#define AB8540_GPIO_PULL_UPDOWN_REG 0x48
+#define AB8500_GPIO_ALTFUN_REG 0x50
+#define AB8500_NUM_VIR_GPIO_IRQ 16
+#define AB8540_GPIO_PULL_UPDOWN_MASK 0x03
+#define AB8540_GPIO_VINSEL_MASK 0x03
+#define AB8540_GPIOX_VBAT_START 51
+#define AB8540_GPIOX_VBAT_END 54
+
+enum abx500_gpio_action {
+ NONE,
+ STARTUP,
+ SHUTDOWN,
+ MASK,
+ UNMASK
+};
+
+struct abx500_pinctrl {
+ struct device *dev;
+ struct pinctrl_dev *pctldev;
+ struct abx500_pinctrl_soc_data *soc;
+ struct gpio_chip chip;
+ struct ab8500 *parent;
+ struct mutex lock;
+ u32 irq_base;
+ enum abx500_gpio_action irq_action;
+ u16 rising;
+ u16 falling;
+ struct abx500_gpio_irq_cluster *irq_cluster;
+ int irq_cluster_size;
+ int irq_gpio_rising_offset;
+ int irq_gpio_falling_offset;
+ int irq_gpio_factor;
+};
+
+/**
+ * to_abx500_pinctrl() - get the pointer to abx500_pinctrl
+ * @chip: Member of the structure abx500_pinctrl
+ */
+static inline struct abx500_pinctrl *to_abx500_pinctrl(struct gpio_chip *chip)
+{
+ return container_of(chip, struct abx500_pinctrl, chip);
+}
+
+static int abx500_gpio_get_bit(struct gpio_chip *chip, u8 reg,
+ unsigned offset, bool *bit)
+{
+ struct abx500_pinctrl *pct = to_abx500_pinctrl(chip);
+ u8 pos = offset % 8;
+ u8 val;
+ int ret;
+
+ reg += offset / 8;
+ ret = abx500_get_register_interruptible(pct->dev,
+ AB8500_MISC, reg, &val);
+
+ *bit = !!(val & BIT(pos));
+
+ if (ret < 0)
+ dev_err(pct->dev,
+ "%s read reg =%x, offset=%x failed\n",
+ __func__, reg, offset);
+
+ return ret;
+}
+
+static int abx500_gpio_set_bits(struct gpio_chip *chip, u8 reg,
+ unsigned offset, int val)
+{
+ struct abx500_pinctrl *pct = to_abx500_pinctrl(chip);
+ u8 pos = offset % 8;
+ int ret;
+
+ reg += offset / 8;
+ ret = abx500_mask_and_set_register_interruptible(pct->dev,
+ AB8500_MISC, reg, 1 << pos, val << pos);
+ if (ret < 0)
+ dev_err(pct->dev, "%s write failed\n", __func__);
+ return ret;
+}
+/**
+ * abx500_gpio_get() - Get the particular GPIO value
+ * @chip: Gpio device
+ * @offset: GPIO number to read
+ */
+static int abx500_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ struct abx500_pinctrl *pct = to_abx500_pinctrl(chip);
+ bool bit;
+ int ret;
+
+ ret = abx500_gpio_get_bit(chip, AB8500_GPIO_IN1_REG,
+ offset, &bit);
+ if (ret < 0) {
+ dev_err(pct->dev, "%s failed\n", __func__);
+ return ret;
+ }
+ return bit;
+}
+
+static void abx500_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
+{
+ struct abx500_pinctrl *pct = to_abx500_pinctrl(chip);
+ int ret;
+
+ ret = abx500_gpio_set_bits(chip, AB8500_GPIO_OUT1_REG, offset, val);
+ if (ret < 0)
+ dev_err(pct->dev, "%s write failed\n", __func__);
+}
+
+static int abx500_config_pull_updown(struct abx500_pinctrl *pct,
+ int offset, enum abx500_gpio_pull_updown val)
+{
+ u8 pos;
+ int ret;
+ struct pullud *pullud;
+
+ if (!pct->soc->pullud) {
+ dev_err(pct->dev, "%s AB chip doesn't support pull up/down feature",
+ __func__);
+ ret = -EPERM;
+ goto out;
+ }
+
+ pullud = pct->soc->pullud;
+
+ if ((offset < pullud->first_pin)
+ || (offset > pullud->last_pin)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ pos = offset << 1;
+
+ ret = abx500_mask_and_set_register_interruptible(pct->dev,
+ AB8500_MISC, AB8540_GPIO_PULL_UPDOWN_REG,
+ AB8540_GPIO_PULL_UPDOWN_MASK << pos, val << pos);
+
+out:
+ if (ret < 0)
+ dev_err(pct->dev, "%s failed (%d)\n", __func__, ret);
+ return ret;
+}
+
+static int abx500_gpio_direction_output(struct gpio_chip *chip,
+ unsigned offset,
+ int val)
+{
+ struct abx500_pinctrl *pct = to_abx500_pinctrl(chip);
+ struct pullud *pullud = pct->soc->pullud;
+ unsigned gpio;
+ int ret;
+ /* set direction as output */
+ ret = abx500_gpio_set_bits(chip, AB8500_GPIO_DIR1_REG, offset, 1);
+ if (ret < 0)
+ return ret;
+
+ /* disable pull down */
+ ret = abx500_gpio_set_bits(chip, AB8500_GPIO_PUD1_REG, offset, 1);
+ if (ret < 0)
+ return ret;
+
+ /* if supported, disable both pull down and pull up */
+ gpio = offset + 1;
+ if (pullud && gpio >= pullud->first_pin && gpio <= pullud->last_pin) {
+ ret = abx500_config_pull_updown(pct,
+ offset,
+ ABX500_GPIO_PULL_NONE);
+ if (ret < 0)
+ return ret;
+ }
+ /* set the output as 1 or 0 */
+ return abx500_gpio_set_bits(chip, AB8500_GPIO_OUT1_REG, offset, val);
+}
+
+static int abx500_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+ /* set the register as input */
+ return abx500_gpio_set_bits(chip, AB8500_GPIO_DIR1_REG, offset, 0);
+}
+
+static int abx500_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+ struct abx500_pinctrl *pct = to_abx500_pinctrl(chip);
+ int base = pct->irq_base;
+ int i;
+
+ for (i = 0; i < pct->irq_cluster_size; i++) {
+ struct abx500_gpio_irq_cluster *cluster =
+ &pct->irq_cluster[i];
+
+ if (offset >= cluster->start && offset <= cluster->end)
+ return base + offset - cluster->start;
+
+ /* Advance by the number of gpios in this cluster */
+ base += cluster->end + cluster->offset - cluster->start + 1;
+ }
+
+ return -EINVAL;
+}
+
+static int abx500_set_mode(struct pinctrl_dev *pctldev, struct gpio_chip *chip,
+ unsigned gpio, int alt_setting)
+{
+ struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
+ struct alternate_functions af = pct->soc->alternate_functions[gpio];
+ int ret;
+ int val;
+ unsigned offset;
+ const char *modes[] = {
+ [ABX500_DEFAULT] = "default",
+ [ABX500_ALT_A] = "altA",
+ [ABX500_ALT_B] = "altB",
+ [ABX500_ALT_C] = "altC",
+ };
+
+ /* sanity check */
+ if (((alt_setting == ABX500_ALT_A) && (af.gpiosel_bit == UNUSED)) ||
+ ((alt_setting == ABX500_ALT_B) && (af.alt_bit1 == UNUSED)) ||
+ ((alt_setting == ABX500_ALT_C) && (af.alt_bit2 == UNUSED))) {
+ dev_dbg(pct->dev, "pin %d doesn't support %s mode\n", gpio,
+ modes[alt_setting]);
+ return -EINVAL;
+ }
+
+ /* on ABx5xx, there is no GPIO0, so adjust the offset */
+ offset = gpio - 1;
+ switch (alt_setting) {
+ case ABX500_DEFAULT:
+ /*
+ * for ABx5xx family, default mode is always selected by
+ * writing 0 to GPIOSELx register, except for pins which
+ * support at least ALT_B mode, default mode is selected
+ * by writing 1 to GPIOSELx register
+ */
+ val = 0;
+ if (af.alt_bit1 != UNUSED)
+ val++;
+
+ ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG,
+ offset, val);
+ break;
+ case ABX500_ALT_A:
+ /*
+ * for ABx5xx family, alt_a mode is always selected by
+ * writing 1 to GPIOSELx register, except for pins which
+ * support at least ALT_B mode, alt_a mode is selected
+ * by writing 0 to GPIOSELx register and 0 in ALTFUNC
+ * register
+ */
+ if (af.alt_bit1 != UNUSED) {
+ ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG,
+ offset, 0);
+ ret = abx500_gpio_set_bits(chip,
+ AB8500_GPIO_ALTFUN_REG,
+ af.alt_bit1,
+ !!(af.alta_val && BIT(0)));
+ if (af.alt_bit2 != UNUSED)
+ ret = abx500_gpio_set_bits(chip,
+ AB8500_GPIO_ALTFUN_REG,
+ af.alt_bit2,
+ !!(af.alta_val && BIT(1)));
+ } else
+ ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG,
+ offset, 1);
+ break;
+ case ABX500_ALT_B:
+ ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG,
+ offset, 0);
+ ret = abx500_gpio_set_bits(chip, AB8500_GPIO_ALTFUN_REG,
+ af.alt_bit1, !!(af.altb_val && BIT(0)));
+ if (af.alt_bit2 != UNUSED)
+ ret = abx500_gpio_set_bits(chip,
+ AB8500_GPIO_ALTFUN_REG,
+ af.alt_bit2,
+ !!(af.altb_val && BIT(1)));
+ break;
+ case ABX500_ALT_C:
+ ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG,
+ offset, 0);
+ ret = abx500_gpio_set_bits(chip, AB8500_GPIO_ALTFUN_REG,
+ af.alt_bit2, !!(af.altc_val && BIT(0)));
+ ret = abx500_gpio_set_bits(chip, AB8500_GPIO_ALTFUN_REG,
+ af.alt_bit2, !!(af.altc_val && BIT(1)));
+ break;
+
+ default:
+ dev_dbg(pct->dev, "unknow alt_setting %d\n", alt_setting);
+ return -EINVAL;
+ }
+ return ret;
+}
+
+static u8 abx500_get_mode(struct pinctrl_dev *pctldev, struct gpio_chip *chip,
+ unsigned gpio)
+{
+ u8 mode;
+ bool bit_mode;
+ bool alt_bit1;
+ bool alt_bit2;
+ struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
+ struct alternate_functions af = pct->soc->alternate_functions[gpio];
+
+ /*
+ * if gpiosel_bit is set to unused,
+ * it means no GPIO or special case
+ */
+ if (af.gpiosel_bit == UNUSED)
+ return ABX500_DEFAULT;
+
+ /* read GpioSelx register */
+ abx500_gpio_get_bit(chip, AB8500_GPIO_SEL1_REG + (gpio / 8),
+ af.gpiosel_bit, &bit_mode);
+ mode = bit_mode;
+
+ /* sanity check */
+ if ((af.alt_bit1 < UNUSED) || (af.alt_bit1 > 7) ||
+ (af.alt_bit2 < UNUSED) || (af.alt_bit2 > 7)) {
+ dev_err(pct->dev,
+ "alt_bitX value not in correct range (-1 to 7)\n");
+ return -EINVAL;
+ }
+ /* if alt_bit2 is used, alt_bit1 must be used too */
+ if ((af.alt_bit2 != UNUSED) && (af.alt_bit1 == UNUSED)) {
+ dev_err(pct->dev,
+ "if alt_bit2 is used, alt_bit1 can't be unused\n");
+ return -EINVAL;
+ }
+
+ /* check if pin use AlternateFunction register */
+ if ((af.alt_bit1 == UNUSED) && (af.alt_bit1 == UNUSED))
+ return mode;
+ /*
+ * if pin GPIOSEL bit is set and pin supports alternate function,
+ * it means DEFAULT mode
+ */
+ if (mode)
+ return ABX500_DEFAULT;
+ /*
+ * pin use the AlternatFunction register
+ * read alt_bit1 value
+ */
+ abx500_gpio_get_bit(chip, AB8500_GPIO_ALTFUN_REG,
+ af.alt_bit1, &alt_bit1);
+
+ if (af.alt_bit2 != UNUSED)
+ /* read alt_bit2 value */
+ abx500_gpio_get_bit(chip, AB8500_GPIO_ALTFUN_REG, af.alt_bit2,
+ &alt_bit2);
+ else
+ alt_bit2 = 0;
+
+ mode = (alt_bit2 << 1) + alt_bit1;
+ if (mode == af.alta_val)
+ return ABX500_ALT_A;
+ else if (mode == af.altb_val)
+ return ABX500_ALT_B;
+ else
+ return ABX500_ALT_C;
+}
+
+#ifdef CONFIG_DEBUG_FS
+
+#include <linux/seq_file.h>
+
+static void abx500_gpio_dbg_show_one(struct seq_file *s,
+ struct pinctrl_dev *pctldev, struct gpio_chip *chip,
+ unsigned offset, unsigned gpio)
+{
+ struct abx500_pinctrl *pct = to_abx500_pinctrl(chip);
+ const char *label = gpiochip_is_requested(chip, offset - 1);
+ u8 gpio_offset = offset - 1;
+ int mode = -1;
+ bool is_out;
+ bool pull;
+ const char *modes[] = {
+ [ABX500_DEFAULT] = "default",
+ [ABX500_ALT_A] = "altA",
+ [ABX500_ALT_B] = "altB",
+ [ABX500_ALT_C] = "altC",
+ };
+
+ abx500_gpio_get_bit(chip, AB8500_GPIO_DIR1_REG, gpio_offset, &is_out);
+ abx500_gpio_get_bit(chip, AB8500_GPIO_PUD1_REG, gpio_offset, &pull);
+
+ if (pctldev)
+ mode = abx500_get_mode(pctldev, chip, offset);
+
+ seq_printf(s, " gpio-%-3d (%-20.20s) %-3s %-9s %s",
+ gpio, label ?: "(none)",
+ is_out ? "out" : "in ",
+ is_out ?
+ (chip->get
+ ? (chip->get(chip, offset) ? "hi" : "lo")
+ : "? ")
+ : (pull ? "pull up" : "pull down"),
+ (mode < 0) ? "unknown" : modes[mode]);
+
+ if (label && !is_out) {
+ int irq = gpio_to_irq(gpio);
+ struct irq_desc *desc = irq_to_desc(irq);
+
+ if (irq >= 0 && desc->action) {
+ char *trigger;
+ int irq_offset = irq - pct->irq_base;
+
+ if (pct->rising & BIT(irq_offset))
+ trigger = "edge-rising";
+ else if (pct->falling & BIT(irq_offset))
+ trigger = "edge-falling";
+ else
+ trigger = "edge-undefined";
+
+ seq_printf(s, " irq-%d %s", irq, trigger);
+ }
+ }
+}
+
+static void abx500_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
+{
+ unsigned i;
+ unsigned gpio = chip->base;
+ struct abx500_pinctrl *pct = to_abx500_pinctrl(chip);
+ struct pinctrl_dev *pctldev = pct->pctldev;
+
+ for (i = 0; i < chip->ngpio; i++, gpio++) {
+ /* On AB8500, there is no GPIO0, the first is the GPIO 1 */
+ abx500_gpio_dbg_show_one(s, pctldev, chip, i + 1, gpio);
+ seq_printf(s, "\n");
+ }
+}
+
+#else
+static inline void abx500_gpio_dbg_show_one(struct seq_file *s,
+ struct pinctrl_dev *pctldev,
+ struct gpio_chip *chip,
+ unsigned offset, unsigned gpio)
+{
+}
+#define abx500_gpio_dbg_show NULL
+#endif
+
+int abx500_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+ int gpio = chip->base + offset;
+
+ return pinctrl_request_gpio(gpio);
+}
+
+void abx500_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+ int gpio = chip->base + offset;
+
+ pinctrl_free_gpio(gpio);
+}
+
+static struct gpio_chip abx500gpio_chip = {
+ .label = "abx500-gpio",
+ .owner = THIS_MODULE,
+ .request = abx500_gpio_request,
+ .free = abx500_gpio_free,
+ .direction_input = abx500_gpio_direction_input,
+ .get = abx500_gpio_get,
+ .direction_output = abx500_gpio_direction_output,
+ .set = abx500_gpio_set,
+ .to_irq = abx500_gpio_to_irq,
+ .dbg_show = abx500_gpio_dbg_show,
+};
+
+static unsigned int irq_to_rising(unsigned int irq)
+{
+ struct abx500_pinctrl *pct = irq_get_chip_data(irq);
+ int offset = irq - pct->irq_base;
+ int new_irq;
+
+ new_irq = offset * pct->irq_gpio_factor
+ + pct->irq_gpio_rising_offset
+ + pct->parent->irq_base;
+
+ return new_irq;
+}
+
+static unsigned int irq_to_falling(unsigned int irq)
+{
+ struct abx500_pinctrl *pct = irq_get_chip_data(irq);
+ int offset = irq - pct->irq_base;
+ int new_irq;
+
+ new_irq = offset * pct->irq_gpio_factor
+ + pct->irq_gpio_falling_offset
+ + pct->parent->irq_base;
+ return new_irq;
+
+}
+
+static unsigned int rising_to_irq(unsigned int irq, void *dev)
+{
+ struct abx500_pinctrl *pct = dev;
+ int offset, new_irq;
+
+ offset = irq - pct->irq_gpio_rising_offset
+ - pct->parent->irq_base;
+ new_irq = (offset / pct->irq_gpio_factor)
+ + pct->irq_base;
+
+ return new_irq;
+}
+
+static unsigned int falling_to_irq(unsigned int irq, void *dev)
+{
+ struct abx500_pinctrl *pct = dev;
+ int offset, new_irq;
+
+ offset = irq - pct->irq_gpio_falling_offset
+ - pct->parent->irq_base;
+ new_irq = (offset / pct->irq_gpio_factor)
+ + pct->irq_base;
+
+ return new_irq;
+}
+
+/*
+ * IRQ handler
+ */
+
+static irqreturn_t handle_rising(int irq, void *dev)
+{
+
+ handle_nested_irq(rising_to_irq(irq , dev));
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t handle_falling(int irq, void *dev)
+{
+
+ handle_nested_irq(falling_to_irq(irq, dev));
+ return IRQ_HANDLED;
+}
+
+static void abx500_gpio_irq_lock(struct irq_data *data)
+{
+ struct abx500_pinctrl *pct = irq_data_get_irq_chip_data(data);
+ mutex_lock(&pct->lock);
+}
+
+static void abx500_gpio_irq_sync_unlock(struct irq_data *data)
+{
+ struct abx500_pinctrl *pct = irq_data_get_irq_chip_data(data);
+ unsigned int irq = data->irq;
+ int offset = irq - pct->irq_base;
+ bool rising = pct->rising & BIT(offset);
+ bool falling = pct->falling & BIT(offset);
+ int ret;
+
+ switch (pct->irq_action) {
+ case STARTUP:
+ if (rising)
+ ret = request_threaded_irq(irq_to_rising(irq),
+ NULL, handle_rising,
+ IRQF_TRIGGER_RISING | IRQF_NO_SUSPEND,
+ "abx500-gpio-r", pct);
+ if (falling)
+ ret = request_threaded_irq(irq_to_falling(irq),
+ NULL, handle_falling,
+ IRQF_TRIGGER_FALLING | IRQF_NO_SUSPEND,
+ "abx500-gpio-f", pct);
+ break;
+ case SHUTDOWN:
+ if (rising)
+ free_irq(irq_to_rising(irq), pct);
+ if (falling)
+ free_irq(irq_to_falling(irq), pct);
+ break;
+ case MASK:
+ if (rising)
+ disable_irq(irq_to_rising(irq));
+ if (falling)
+ disable_irq(irq_to_falling(irq));
+ break;
+ case UNMASK:
+ if (rising)
+ enable_irq(irq_to_rising(irq));
+ if (falling)
+ enable_irq(irq_to_falling(irq));
+ break;
+ case NONE:
+ break;
+ }
+ pct->irq_action = NONE;
+ pct->rising &= ~(BIT(offset));
+ pct->falling &= ~(BIT(offset));
+ mutex_unlock(&pct->lock);
+}
+
+
+static void abx500_gpio_irq_mask(struct irq_data *data)
+{
+ struct abx500_pinctrl *pct = irq_data_get_irq_chip_data(data);
+ pct->irq_action = MASK;
+}
+
+static void abx500_gpio_irq_unmask(struct irq_data *data)
+{
+ struct abx500_pinctrl *pct = irq_data_get_irq_chip_data(data);
+ pct->irq_action = UNMASK;
+}
+
+static int abx500_gpio_irq_set_type(struct irq_data *data, unsigned int type)
+{
+ struct abx500_pinctrl *pct = irq_data_get_irq_chip_data(data);
+ unsigned int irq = data->irq;
+ int offset = irq - pct->irq_base;
+
+ if (type == IRQ_TYPE_EDGE_BOTH) {
+ pct->rising = BIT(offset);
+ pct->falling = BIT(offset);
+ } else if (type == IRQ_TYPE_EDGE_RISING) {
+ pct->rising = BIT(offset);
+ } else {
+ pct->falling = BIT(offset);
+ }
+ return 0;
+}
+
+static unsigned int abx500_gpio_irq_startup(struct irq_data *data)
+{
+ struct abx500_pinctrl *pct = irq_data_get_irq_chip_data(data);
+ pct->irq_action = STARTUP;
+ return 0;
+}
+
+static void abx500_gpio_irq_shutdown(struct irq_data *data)
+{
+ struct abx500_pinctrl *pct = irq_data_get_irq_chip_data(data);
+ pct->irq_action = SHUTDOWN;
+}
+
+static struct irq_chip abx500_gpio_irq_chip = {
+ .name = "abx500-gpio",
+ .irq_startup = abx500_gpio_irq_startup,
+ .irq_shutdown = abx500_gpio_irq_shutdown,
+ .irq_bus_lock = abx500_gpio_irq_lock,
+ .irq_bus_sync_unlock = abx500_gpio_irq_sync_unlock,
+ .irq_mask = abx500_gpio_irq_mask,
+ .irq_unmask = abx500_gpio_irq_unmask,
+ .irq_set_type = abx500_gpio_irq_set_type,
+};
+
+static int abx500_gpio_irq_init(struct abx500_pinctrl *pct)
+{
+ u32 base = pct->irq_base;
+ int irq;
+
+ for (irq = base; irq < base + AB8500_NUM_VIR_GPIO_IRQ ; irq++) {
+ irq_set_chip_data(irq, pct);
+ irq_set_chip_and_handler(irq, &abx500_gpio_irq_chip,
+ handle_simple_irq);
+ irq_set_nested_thread(irq, 1);
+#ifdef CONFIG_ARM
+ set_irq_flags(irq, IRQF_VALID);
+#else
+ irq_set_noprobe(irq);
+#endif
+ }
+
+ return 0;
+}
+
+static void abx500_gpio_irq_remove(struct abx500_pinctrl *pct)
+{
+ int base = pct->irq_base;
+ int irq;
+
+ for (irq = base; irq < base + AB8500_NUM_VIR_GPIO_IRQ; irq++) {
+#ifdef CONFIG_ARM
+ set_irq_flags(irq, 0);
+#endif
+ irq_set_chip_and_handler(irq, NULL, NULL);
+ irq_set_chip_data(irq, NULL);
+ }
+}
+
+static int abx500_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev)
+{
+ struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
+
+ return pct->soc->nfunctions;
+}
+
+static const char *abx500_pmx_get_func_name(struct pinctrl_dev *pctldev,
+ unsigned function)
+{
+ struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
+
+ return pct->soc->functions[function].name;
+}
+
+static int abx500_pmx_get_func_groups(struct pinctrl_dev *pctldev,
+ unsigned function,
+ const char * const **groups,
+ unsigned * const num_groups)
+{
+ struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = pct->soc->functions[function].groups;
+ *num_groups = pct->soc->functions[function].ngroups;
+
+ return 0;
+}
+
+static void abx500_disable_lazy_irq(struct gpio_chip *chip, unsigned gpio)
+{
+ struct abx500_pinctrl *pct = to_abx500_pinctrl(chip);
+ int irq;
+ int offset;
+ bool rising;
+ bool falling;
+
+ /*
+ * check if gpio has interrupt capability and convert
+ * gpio number to irq
+ * On ABx5xx, there is no GPIO0, GPIO1 is the
+ * first one, so adjust gpio number
+ */
+ gpio--;
+ irq = gpio_to_irq(gpio + chip->base);
+ if (irq < 0)
+ return;
+
+ offset = irq - pct->irq_base;
+ rising = pct->rising & BIT(offset);
+ falling = pct->falling & BIT(offset);
+
+ /* nothing to do ?*/
+ if (!rising && !falling)
+ return;
+
+ if (rising) {
+ disable_irq(irq_to_rising(irq));
+ free_irq(irq_to_rising(irq), pct);
+ }
+ if (falling) {
+ disable_irq(irq_to_falling(irq));
+ free_irq(irq_to_falling(irq), pct);
+ }
+}
+
+static int abx500_pmx_enable(struct pinctrl_dev *pctldev, unsigned function,
+ unsigned group)
+{
+ struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
+ struct gpio_chip *chip = &pct->chip;
+ const struct abx500_pingroup *g;
+ int i;
+ int ret = 0;
+
+ g = &pct->soc->groups[group];
+ if (g->altsetting < 0)
+ return -EINVAL;
+
+ dev_dbg(pct->dev, "enable group %s, %u pins\n", g->name, g->npins);
+
+ for (i = 0; i < g->npins; i++) {
+ dev_dbg(pct->dev, "setting pin %d to altsetting %d\n",
+ g->pins[i], g->altsetting);
+
+ abx500_disable_lazy_irq(chip, g->pins[i]);
+ ret = abx500_set_mode(pctldev, chip, g->pins[i], g->altsetting);
+ }
+ return ret;
+}
+
+static void abx500_pmx_disable(struct pinctrl_dev *pctldev,
+ unsigned function, unsigned group)
+{
+ struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
+ const struct abx500_pingroup *g;
+
+ g = &pct->soc->groups[group];
+ if (g->altsetting < 0)
+ return;
+
+ /* FIXME: poke out the mux, set the pin to some default state? */
+ dev_dbg(pct->dev, "disable group %s, %u pins\n", g->name, g->npins);
+}
+
+int abx500_gpio_request_enable(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned offset)
+{
+ struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
+ const struct abx500_pinrange *p;
+ int ret;
+ int i;
+
+ /*
+ * Different ranges have different ways to enable GPIO function on a
+ * pin, so refer back to our local range type, where we handily define
+ * what altfunc enables GPIO for a certain pin.
+ */
+ for (i = 0; i < pct->soc->gpio_num_ranges; i++) {
+ p = &pct->soc->gpio_ranges[i];
+ if ((offset >= p->offset) &&
+ (offset < (p->offset + p->npins)))
+ break;
+ }
+
+ if (i == pct->soc->gpio_num_ranges) {
+ dev_err(pct->dev, "%s failed to locate range\n", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(pct->dev, "enable GPIO by altfunc %d at gpio %d\n",
+ p->altfunc, offset);
+
+ ret = abx500_set_mode(pct->pctldev, &pct->chip,
+ offset, p->altfunc);
+ if (ret < 0) {
+ dev_err(pct->dev, "%s setting altfunc failed\n", __func__);
+ return ret;
+ }
+
+ return ret;
+}
+
+static void abx500_gpio_disable_free(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned offset)
+{
+}
+
+static struct pinmux_ops abx500_pinmux_ops = {
+ .get_functions_count = abx500_pmx_get_funcs_cnt,
+ .get_function_name = abx500_pmx_get_func_name,
+ .get_function_groups = abx500_pmx_get_func_groups,
+ .enable = abx500_pmx_enable,
+ .disable = abx500_pmx_disable,
+ .gpio_request_enable = abx500_gpio_request_enable,
+ .gpio_disable_free = abx500_gpio_disable_free,
+};
+
+static int abx500_get_groups_cnt(struct pinctrl_dev *pctldev)
+{
+ struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
+
+ return pct->soc->ngroups;
+}
+
+static const char *abx500_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned selector)
+{
+ struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
+
+ return pct->soc->groups[selector].name;
+}
+
+static int abx500_get_group_pins(struct pinctrl_dev *pctldev,
+ unsigned selector,
+ const unsigned **pins,
+ unsigned *num_pins)
+{
+ struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
+
+ *pins = pct->soc->groups[selector].pins;
+ *num_pins = pct->soc->groups[selector].npins;
+ return 0;
+}
+
+static void abx500_pin_dbg_show(struct pinctrl_dev *pctldev,
+ struct seq_file *s, unsigned offset)
+{
+ struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
+ struct gpio_chip *chip = &pct->chip;
+
+ abx500_gpio_dbg_show_one(s, pctldev, chip, offset,
+ chip->base + offset - 1);
+}
+
+static struct pinctrl_ops abx500_pinctrl_ops = {
+ .get_groups_count = abx500_get_groups_cnt,
+ .get_group_name = abx500_get_group_name,
+ .get_group_pins = abx500_get_group_pins,
+ .pin_dbg_show = abx500_pin_dbg_show,
+};
+
+int abx500_pin_config_get(struct pinctrl_dev *pctldev,
+ unsigned pin,
+ unsigned long *config)
+{
+ /* Not implemented */
+ return -EINVAL;
+}
+
+int abx500_pin_config_set(struct pinctrl_dev *pctldev,
+ unsigned pin,
+ unsigned long config)
+{
+ struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev);
+ struct pullud *pullud = pct->soc->pullud;
+ struct gpio_chip *chip = &pct->chip;
+ unsigned offset;
+ int ret;
+ enum pin_config_param param = pinconf_to_config_param(config);
+ enum pin_config_param argument = pinconf_to_config_argument(config);
+
+ dev_dbg(chip->dev, "pin %d [%#lx]: %s %s\n",
+ pin, config, (param == PIN_CONFIG_OUTPUT) ? "output " : "input",
+ (param == PIN_CONFIG_OUTPUT) ? (argument ? "high" : "low") :
+ (argument ? "pull up" : "pull down"));
+ /* on ABx500, there is no GPIO0, so adjust the offset */
+ offset = pin - 1;
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ /*
+ * if argument = 1 set the pull down
+ * else clear the pull down
+ */
+ ret = abx500_gpio_direction_input(chip, offset);
+ /*
+ * Some chips only support pull down, while some actually
+ * support both pull up and pull down. Such chips have
+ * a "pullud" range specified for the pins that support
+ * both features. If the pin is not within that range, we
+ * fall back to the old bit set that only support pull down.
+ */
+ if (pullud &&
+ pin >= pullud->first_pin &&
+ pin <= pullud->last_pin)
+ ret = abx500_config_pull_updown(pct,
+ offset,
+ argument ? ABX500_GPIO_PULL_DOWN : ABX500_GPIO_PULL_NONE);
+ else
+ /* Chip only supports pull down */
+ ret = abx500_gpio_set_bits(chip, AB8500_GPIO_PUD1_REG,
+ offset, argument ? 0 : 1);
+ break;
+ case PIN_CONFIG_OUTPUT:
+ ret = abx500_gpio_direction_output(chip, offset, argument);
+ break;
+ default:
+ dev_err(chip->dev, "illegal configuration requested\n");
+ return -EINVAL;
+ }
+ return ret;
+}
+
+static struct pinconf_ops abx500_pinconf_ops = {
+ .pin_config_get = abx500_pin_config_get,
+ .pin_config_set = abx500_pin_config_set,
+};
+
+static struct pinctrl_desc abx500_pinctrl_desc = {
+ .name = "pinctrl-abx500",
+ .pctlops = &abx500_pinctrl_ops,
+ .pmxops = &abx500_pinmux_ops,
+ .confops = &abx500_pinconf_ops,
+ .owner = THIS_MODULE,
+};
+
+static int abx500_get_gpio_num(struct abx500_pinctrl_soc_data *soc)
+{
+ unsigned int lowest = 0;
+ unsigned int highest = 0;
+ unsigned int npins = 0;
+ int i;
+
+ /*
+ * Compute number of GPIOs from the last SoC gpio range descriptors
+ * These ranges may include "holes" but the GPIO number space shall
+ * still be homogeneous, so we need to detect and account for any
+ * such holes so that these are included in the number of GPIO pins.
+ */
+ for (i = 0; i < soc->gpio_num_ranges; i++) {
+ unsigned gstart;
+ unsigned gend;
+ const struct abx500_pinrange *p;
+
+ p = &soc->gpio_ranges[i];
+ gstart = p->offset;
+ gend = p->offset + p->npins - 1;
+
+ if (i == 0) {
+ /* First iteration, set start values */
+ lowest = gstart;
+ highest = gend;
+ } else {
+ if (gstart < lowest)
+ lowest = gstart;
+ if (gend > highest)
+ highest = gend;
+ }
+ }
+ /* this gives the absolute number of pins */
+ npins = highest - lowest + 1;
+ return npins;
+}
+
+static int __devinit abx500_gpio_probe(struct platform_device *pdev)
+{
+ struct ab8500_platform_data *abx500_pdata =
+ dev_get_platdata(pdev->dev.parent);
+ struct abx500_gpio_platform_data *pdata;
+ struct abx500_pinctrl *pct;
+ const struct platform_device_id *platid = platform_get_device_id(pdev);
+ int ret;
+ int i;
+
+ pdata = abx500_pdata->gpio;
+ if (!pdata) {
+ dev_err(&pdev->dev, "gpio platform data missing\n");
+ return -ENODEV;
+ }
+
+ pct = devm_kzalloc(&pdev->dev, sizeof(struct abx500_pinctrl),
+ GFP_KERNEL);
+ if (pct == NULL) {
+ dev_err(&pdev->dev,
+ "failed to allocate memory for pct\n");
+ return -ENOMEM;
+ }
+
+ pct->dev = &pdev->dev;
+ pct->parent = dev_get_drvdata(pdev->dev.parent);
+ pct->chip = abx500gpio_chip;
+ pct->chip.dev = &pdev->dev;
+ pct->chip.base = pdata->gpio_base;
+ pct->irq_base = pdata->irq_base;
+
+ /* initialize the lock */
+ mutex_init(&pct->lock);
+
+ /* Poke in other ASIC variants here */
+ switch (platid->driver_data) {
+ default:
+ dev_err(&pdev->dev, "Unsupported pinctrl sub driver (%d)\n",
+ (int) platid->driver_data);
+ return -EINVAL;
+ }
+
+ if (!pct->soc) {
+ dev_err(&pdev->dev, "Invalid SOC data\n");
+ return -EINVAL;
+ }
+
+ pct->chip.ngpio = abx500_get_gpio_num(pct->soc);
+ pct->irq_cluster = pct->soc->gpio_irq_cluster;
+ pct->irq_cluster_size = pct->soc->ngpio_irq_cluster;
+ pct->irq_gpio_rising_offset = pct->soc->irq_gpio_rising_offset;
+ pct->irq_gpio_falling_offset = pct->soc->irq_gpio_falling_offset;
+ pct->irq_gpio_factor = pct->soc->irq_gpio_factor;
+
+ ret = abx500_gpio_irq_init(pct);
+ if (ret)
+ goto out_free;
+ ret = gpiochip_add(&pct->chip);
+ if (ret) {
+ dev_err(&pdev->dev, "unable to add gpiochip: %d\n",
+ ret);
+ goto out_rem_irq;
+ }
+ dev_info(&pdev->dev, "added gpiochip\n");
+
+ abx500_pinctrl_desc.pins = pct->soc->pins;
+ abx500_pinctrl_desc.npins = pct->soc->npins;
+ pct->pctldev = pinctrl_register(&abx500_pinctrl_desc, &pdev->dev, pct);
+ if (!pct->pctldev) {
+ dev_err(&pdev->dev,
+ "could not register abx500 pinctrl driver\n");
+ goto out_rem_chip;
+ }
+ dev_info(&pdev->dev, "registered pin controller\n");
+
+ /* We will handle a range of GPIO pins */
+ for (i = 0; i < pct->soc->gpio_num_ranges; i++) {
+ const struct abx500_pinrange *p = &pct->soc->gpio_ranges[i];
+
+ ret = gpiochip_add_pin_range(&pct->chip,
+ dev_name(&pdev->dev),
+ p->offset - 1, p->offset, p->npins);
+ if (ret < 0)
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, pct);
+ dev_info(&pdev->dev, "initialized abx500 pinctrl driver\n");
+
+ return 0;
+
+out_rem_chip:
+ ret = gpiochip_remove(&pct->chip);
+ if (ret)
+ dev_info(&pdev->dev, "failed to remove gpiochip\n");
+out_rem_irq:
+ abx500_gpio_irq_remove(pct);
+out_free:
+ mutex_destroy(&pct->lock);
+ return ret;
+}
+
+/*
+ * abx500_gpio_remove() - remove Ab8500-gpio driver
+ * @pdev : Platform device registered
+ */
+static int __devexit abx500_gpio_remove(struct platform_device *pdev)
+{
+ struct abx500_pinctrl *pct = platform_get_drvdata(pdev);
+ int ret;
+
+ ret = gpiochip_remove(&pct->chip);
+ if (ret < 0) {
+ dev_err(pct->dev, "unable to remove gpiochip: %d\n",
+ ret);
+ return ret;
+ }
+
+ mutex_destroy(&pct->lock);
+
+ return 0;
+}
+
+static const struct platform_device_id abx500_pinctrl_id[] = {
+ { "pinctrl-ab8500", PINCTRL_AB8500 },
+ { "pinctrl-ab8540", PINCTRL_AB8540 },
+ { "pinctrl-ab9540", PINCTRL_AB9540 },
+ { "pinctrl-ab8505", PINCTRL_AB8505 },
+ { },
+};
+
+static struct platform_driver abx500_gpio_driver = {
+ .driver = {
+ .name = "abx500-gpio",
+ .owner = THIS_MODULE,
+ },
+ .probe = abx500_gpio_probe,
+ .remove = __devexit_p(abx500_gpio_remove),
+ .id_table = abx500_pinctrl_id,
+};
+
+static int __init abx500_gpio_init(void)
+{
+ return platform_driver_register(&abx500_gpio_driver);
+}
+core_initcall(abx500_gpio_init);
+
+MODULE_AUTHOR("Patrice Chotard <patrice.chotard@xxxxxx>");
+MODULE_DESCRIPTION("Driver allows to use AxB5xx unused pins to be used as GPIO");
+MODULE_ALIAS("platform:abx500-gpio");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pinctrl/pinctrl-abx500.h b/drivers/pinctrl/pinctrl-abx500.h
new file mode 100644
index 0000000..436ace3
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-abx500.h
@@ -0,0 +1,180 @@
+#ifndef PINCTRL_PINCTRL_ABx5O0_H
+#define PINCTRL_PINCTRL_ABx500_H
+
+/* Package definitions */
+#define PINCTRL_AB8500 0
+#define PINCTRL_AB8540 1
+#define PINCTRL_AB9540 2
+#define PINCTRL_AB8505 3
+
+/* pins alternate function */
+enum abx500_pin_func {
+ ABX500_DEFAULT,
+ ABX500_ALT_A,
+ ABX500_ALT_B,
+ ABX500_ALT_C,
+};
+
+/**
+ * struct abx500_function - ABx500 pinctrl mux function
+ * @name: The name of the function, exported to pinctrl core.
+ * @groups: An array of pin groups that may select this function.
+ * @ngroups: The number of entries in @groups.
+ */
+struct abx500_function {
+ const char *name;
+ const char * const *groups;
+ unsigned ngroups;
+};
+
+/**
+ * struct abx500_pingroup - describes a ABx500 pin group
+ * @name: the name of this specific pin group
+ * @pins: an array of discrete physical pins used in this group, taken
+ * from the driver-local pin enumeration space
+ * @num_pins: the number of pins in this group array, i.e. the number of
+ * elements in .pins so we can iterate over that array
+ * @altsetting: the altsetting to apply to all pins in this group to
+ * configure them to be used by a function
+ */
+struct abx500_pingroup {
+ const char *name;
+ const unsigned int *pins;
+ const unsigned npins;
+ int altsetting;
+};
+
+#define ALTERNATE_FUNCTIONS(pin, sel_bit, alt1, alt2, alta, altb, altc) \
+{ \
+ .pin_number = pin, \
+ .gpiosel_bit = sel_bit, \
+ .alt_bit1 = alt1, \
+ .alt_bit2 = alt2, \
+ .alta_val = alta, \
+ .altb_val = altb, \
+ .altc_val = altc, \
+}
+
+#define UNUSED -1
+/**
+ * struct alternate_functions
+ * @pin_number: The pin number
+ * @gpiosel_bit: Control bit in GPIOSEL register,
+ * @alt_bit1: First AlternateFunction bit used to select the
+ * alternate function
+ * @alt_bit2: Second AlternateFunction bit used to select the
+ * alternate function
+ *
+ * these 3 following fields are necessary due to none
+ * coherency on how to select the altA, altB and altC
+ * function between the ABx500 SOC family when using
+ * alternatfunc register.
+ * @alta_val: value to write in alternatfunc to select altA function
+ * @altb_val: value to write in alternatfunc to select altB function
+ * @altc_val: value to write in alternatfunc to select altC function
+ */
+struct alternate_functions {
+ unsigned pin_number;
+ s8 gpiosel_bit;
+ s8 alt_bit1;
+ s8 alt_bit2;
+ u8 alta_val;
+ u8 altb_val;
+ u8 altc_val;
+};
+
+/**
+ * struct pullud - specific pull up/down feature
+ * @first_pin: The pin number of the first pins which support
+ * specific pull up/down
+ * @last_pin: The pin number of the last pins
+ */
+struct pullud {
+ unsigned first_pin;
+ unsigned last_pin;
+};
+
+#define GPIO_IRQ_CLUSTER(a, b, c) \
+{ \
+ .start = a, \
+ .end = b, \
+ .offset = c, \
+}
+
+/**
+ * struct abx500_gpio_irq_cluster - indicates GPIOs which are interrupt
+ * capable
+ * @start: The pin number of the first pin interrupt capable
+ * @end: The pin number of the last pin interrupt capable
+ * @offset: offset used to compute specific setting strategy of
+ * the interrupt line
+ */
+
+struct abx500_gpio_irq_cluster {
+ int start;
+ int end;
+ int offset;
+};
+
+/**
+ * struct abx500_pinrange - map pin numbers to GPIO offsets
+ * @offset: offset into the GPIO local numberspace, incidentally
+ * identical to the offset into the local pin numberspace
+ * @npins: number of pins to map from both offsets
+ * @altfunc: altfunc setting to be used to enable GPIO on a pin in
+ * this range (may vary)
+ */
+struct abx500_pinrange {
+ unsigned int offset;
+ unsigned int npins;
+ int altfunc;
+};
+
+#define ABX500_PINRANGE(a, b, c) { .offset = a, .npins = b, .altfunc = c }
+
+/**
+ * struct abx500_pinctrl_soc_data - ABx500 pin controller per-SoC configuration
+ * @gpio_ranges: An array of GPIO ranges for this SoC
+ * @gpio_num_ranges: The number of GPIO ranges for this SoC
+ * @pins: An array describing all pins the pin controller affects.
+ * All pins which are also GPIOs must be listed first within the
+ * array, and be numbered identically to the GPIO controller's
+ * numbering.
+ * @npins: The number of entries in @pins.
+ * @functions: The functions supported on this SoC.
+ * @nfunction: The number of entries in @functions.
+ * @groups: An array describing all pin groups the pin SoC supports.
+ * @ngroups: The number of entries in @groups.
+ * @alternate_functions: array describing pins which supports alternate and
+ * how to set it.
+ * @pullud: array describing pins which supports pull up/down
+ * specific registers.
+ * @gpio_irq_cluster: An array of GPIO interrupt capable for this SoC
+ * @ngpio_irq_cluster: The number of GPIO inetrrupt capable for this SoC
+ * @irq_gpio_rising_offset: Interrupt offset used as base to compute specific
+ * setting strategy of the rising interrupt line
+ * @irq_gpio_falling_offset: Interrupt offset used as base to compute specific
+ * setting strategy of the falling interrupt line
+ * @irq_gpio_factor: Factor used to compute specific setting strategy of
+ * the interrupt line
+ */
+
+struct abx500_pinctrl_soc_data {
+ const struct abx500_pinrange *gpio_ranges;
+ unsigned gpio_num_ranges;
+ const struct pinctrl_pin_desc *pins;
+ unsigned npins;
+ const struct abx500_function *functions;
+ unsigned nfunctions;
+ const struct abx500_pingroup *groups;
+ unsigned ngroups;
+ struct alternate_functions *alternate_functions;
+ struct pullud *pullud;
+ struct abx500_gpio_irq_cluster *gpio_irq_cluster;
+ unsigned ngpio_irq_cluster;
+ int irq_gpio_rising_offset;
+ int irq_gpio_falling_offset;
+ int irq_gpio_factor;
+};
+
+#endif /* PINCTRL_PINCTRL_ABx500_H */
diff --git a/include/linux/mfd/abx500/ab8500-gpio.h b/include/linux/mfd/abx500/ab8500-gpio.h
index 2387c20..e8c8281 100644
--- a/include/linux/mfd/abx500/ab8500-gpio.h
+++ b/include/linux/mfd/abx500/ab8500-gpio.h
@@ -14,10 +14,21 @@
* registers.
*/
-struct ab8500_gpio_platform_data {
+struct abx500_gpio_platform_data {
int gpio_base;
u32 irq_base;
- u8 config_reg[8];
+};
+
+enum abx500_gpio_pull_updown {
+ ABX500_GPIO_PULL_DOWN = 0x0,
+ ABX500_GPIO_PULL_NONE = 0x1,
+ ABX500_GPIO_PULL_UP = 0x3,
+};
+
+enum abx500_gpio_vinsel {
+ ABX500_GPIO_VINSEL_VBAT = 0x0,
+ ABX500_GPIO_VINSEL_VIN_1V8 = 0x1,
+ ABX500_GPIO_VINSEL_VDD_BIF = 0x2,
};
#endif /* _AB8500_GPIO_H */
diff --git a/include/linux/mfd/abx500/ab8500.h b/include/linux/mfd/abx500/ab8500.h
index e640ea0..fc05344 100644
--- a/include/linux/mfd/abx500/ab8500.h
+++ b/include/linux/mfd/abx500/ab8500.h
@@ -385,7 +385,7 @@ struct ab8500_platform_data {
struct ab8500_regulator_reg_init *regulator_reg_init;
int num_regulator;
struct regulator_init_data *regulator;
- struct ab8500_gpio_platform_data *gpio;
+ struct abx500_gpio_platform_data *gpio;
struct ab8500_codec_platform_data *codec;
};
--
1.7.11.3
--
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