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authorLinus Torvalds <torvalds@linux-foundation.org>2012-07-30 12:41:17 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-30 12:41:17 -0700
commit3e701cdfe601306817604ca7f79f1d1c1088007c (patch)
tree1b0a4088a091f035d8be06758a604ca449223fc0 /drivers/gpio
parent7d3d09b01a028e9dd1282149fdcd2a6e0edd73e4 (diff)
parent3c1534c7ecffeb4330bba4c55d17f301528195b6 (diff)
Merge tag 'mfd-3.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
Pull MFD bits from Samuel Ortiz: "We have support for a few new drivers: - Samsung s2mps11 - Wolfson Microelectronics wm5102 and wm5110 - Marvell 88PM800 and 88PM805 - TI twl6041 We also have our regular driver improvements: - Device tree and IRQ domain support for STE AB8500 - Regmap and devm_* API conversion for TI tps6586x - Device tree support for Samsung max77686 - devm_* API conversion for STE AB3100 Besides that, quite a lot of fixing and cleanup for mc13xxx, tps65910, tps65090, da9052 and twl-core." Fix up mostly trivial conflicts, with the exception of drivers/usb/host/ehci-omap.c in particular, which had some re-organization of the reset sequence (commit 1a49e2ac9651: "EHCI: centralize controller initialization") that clashed with commit 2761a6394516 ("mfd: USB: Fix the omap-usb EHCI ULPI PHY reset fix issues"). In particular, commit 2761a6394516 moved the usb_add_hcd() to the *middle* of the reset sequence, which clashes fairly badly with the reset sequence re-organization (although it could have been done inside the new omap_ehci_init() function). I left that part of commit 2761a6394516 just undone. * tag 'mfd-3.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (110 commits) mfd: Ensure AB8500 platform data is passed through db8500-prcmu to MFD Core mfd: Arizone core should select MFD_CORE mfd: Fix arizona-irq.c build by selecting REGMAP_IRQ mfd: Add debug trace on entering and leaving arizone runtime suspend mfd: Correct tps65090 cell names mfd: Remove gpio support from tps6586x core driver ARM: tegra: defconfig: Enable tps6586x gpio gpio: tps6586x: Add gpio support through platform driver mfd: Cache tps6586x register through regmap mfd: Use regmap for tps6586x register access. mfd: Use devm managed resources for tps6586x input: Add onkey support for 88PM80X PMIC mfd: Add support for twl6041 mfd: Fix twl6040 revision information mfd: Matches should be NULL when populate anatop child devices input: ab8500-ponkey: Create AB8500 domain IRQ mapping mfd: Add missing out of memory check for pcf50633 Documentation: Describe the AB8500 Device Tree bindings mfd: Add tps65910 32-kHz-crystal-input init mfd: Drop modifying mc13xxx driver's id_table in probe ...
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/Kconfig7
-rw-r--r--drivers/gpio/Makefile1
-rw-r--r--drivers/gpio/gpio-tps6586x.c158
3 files changed, 166 insertions, 0 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 502b5ea43f4..b16c8a72a2e 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -597,6 +597,13 @@ config GPIO_AB8500
help
Select this to enable the AB8500 IC GPIO driver
+config GPIO_TPS6586X
+ bool "TPS6586X GPIO"
+ depends on MFD_TPS6586X
+ help
+ Select this option to enable GPIO driver for the TPS6586X
+ chip family.
+
config GPIO_TPS65910
bool "TPS65910 GPIO"
depends on MFD_TPS65910
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index d37048105a8..153caceeb05 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -63,6 +63,7 @@ obj-$(CONFIG_GPIO_TC3589X) += gpio-tc3589x.o
obj-$(CONFIG_ARCH_TEGRA) += gpio-tegra.o
obj-$(CONFIG_GPIO_TIMBERDALE) += gpio-timberdale.o
obj-$(CONFIG_ARCH_DAVINCI_TNETV107X) += gpio-tnetv107x.o
+obj-$(CONFIG_GPIO_TPS6586X) += gpio-tps6586x.o
obj-$(CONFIG_GPIO_TPS65910) += gpio-tps65910.o
obj-$(CONFIG_GPIO_TPS65912) += gpio-tps65912.o
obj-$(CONFIG_GPIO_TWL4030) += gpio-twl4030.o
diff --git a/drivers/gpio/gpio-tps6586x.c b/drivers/gpio/gpio-tps6586x.c
new file mode 100644
index 00000000000..2526b3bb0fa
--- /dev/null
+++ b/drivers/gpio/gpio-tps6586x.c
@@ -0,0 +1,158 @@
+/*
+ * TI TPS6586x GPIO driver
+ *
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ * Author: Laxman dewangan <ldewangan@nvidia.com>
+ *
+ * Based on tps6586x.c
+ * Copyright (c) 2010 CompuLab Ltd.
+ * Mike Rapoport <mike@compulab.co.il>
+ *
+ * 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/errno.h>
+#include <linux/gpio.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mfd/tps6586x.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+
+/* GPIO control registers */
+#define TPS6586X_GPIOSET1 0x5d
+#define TPS6586X_GPIOSET2 0x5e
+
+struct tps6586x_gpio {
+ struct gpio_chip gpio_chip;
+ struct device *parent;
+};
+
+static inline struct tps6586x_gpio *to_tps6586x_gpio(struct gpio_chip *chip)
+{
+ return container_of(chip, struct tps6586x_gpio, gpio_chip);
+}
+
+static int tps6586x_gpio_get(struct gpio_chip *gc, unsigned offset)
+{
+ struct tps6586x_gpio *tps6586x_gpio = to_tps6586x_gpio(gc);
+ uint8_t val;
+ int ret;
+
+ ret = tps6586x_read(tps6586x_gpio->parent, TPS6586X_GPIOSET2, &val);
+ if (ret)
+ return ret;
+
+ return !!(val & (1 << offset));
+}
+
+static void tps6586x_gpio_set(struct gpio_chip *gc, unsigned offset,
+ int value)
+{
+ struct tps6586x_gpio *tps6586x_gpio = to_tps6586x_gpio(gc);
+
+ tps6586x_update(tps6586x_gpio->parent, TPS6586X_GPIOSET2,
+ value << offset, 1 << offset);
+}
+
+static int tps6586x_gpio_output(struct gpio_chip *gc, unsigned offset,
+ int value)
+{
+ struct tps6586x_gpio *tps6586x_gpio = to_tps6586x_gpio(gc);
+ uint8_t val, mask;
+
+ tps6586x_gpio_set(gc, offset, value);
+
+ val = 0x1 << (offset * 2);
+ mask = 0x3 << (offset * 2);
+
+ return tps6586x_update(tps6586x_gpio->parent, TPS6586X_GPIOSET1,
+ val, mask);
+}
+
+static int __devinit tps6586x_gpio_probe(struct platform_device *pdev)
+{
+ struct tps6586x_platform_data *pdata;
+ struct tps6586x_gpio *tps6586x_gpio;
+ int ret;
+
+ pdata = dev_get_platdata(pdev->dev.parent);
+ tps6586x_gpio = devm_kzalloc(&pdev->dev,
+ sizeof(*tps6586x_gpio), GFP_KERNEL);
+ if (!tps6586x_gpio) {
+ dev_err(&pdev->dev, "Could not allocate tps6586x_gpio\n");
+ return -ENOMEM;
+ }
+
+ tps6586x_gpio->parent = pdev->dev.parent;
+
+ tps6586x_gpio->gpio_chip.owner = THIS_MODULE;
+ tps6586x_gpio->gpio_chip.label = pdev->name;
+ tps6586x_gpio->gpio_chip.dev = &pdev->dev;
+ tps6586x_gpio->gpio_chip.ngpio = 4;
+ tps6586x_gpio->gpio_chip.can_sleep = 1;
+
+ /* FIXME: add handling of GPIOs as dedicated inputs */
+ tps6586x_gpio->gpio_chip.direction_output = tps6586x_gpio_output;
+ tps6586x_gpio->gpio_chip.set = tps6586x_gpio_set;
+ tps6586x_gpio->gpio_chip.get = tps6586x_gpio_get;
+
+#ifdef CONFIG_OF_GPIO
+ tps6586x_gpio->gpio_chip.of_node = pdev->dev.parent->of_node;
+#endif
+ if (pdata && pdata->gpio_base)
+ tps6586x_gpio->gpio_chip.base = pdata->gpio_base;
+ else
+ tps6586x_gpio->gpio_chip.base = -1;
+
+ ret = gpiochip_add(&tps6586x_gpio->gpio_chip);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, tps6586x_gpio);
+
+ return ret;
+}
+
+static int __devexit tps6586x_gpio_remove(struct platform_device *pdev)
+{
+ struct tps6586x_gpio *tps6586x_gpio = platform_get_drvdata(pdev);
+
+ return gpiochip_remove(&tps6586x_gpio->gpio_chip);
+}
+
+static struct platform_driver tps6586x_gpio_driver = {
+ .driver.name = "tps6586x-gpio",
+ .driver.owner = THIS_MODULE,
+ .probe = tps6586x_gpio_probe,
+ .remove = __devexit_p(tps6586x_gpio_remove),
+};
+
+static int __init tps6586x_gpio_init(void)
+{
+ return platform_driver_register(&tps6586x_gpio_driver);
+}
+subsys_initcall(tps6586x_gpio_init);
+
+static void __exit tps6586x_gpio_exit(void)
+{
+ platform_driver_unregister(&tps6586x_gpio_driver);
+}
+module_exit(tps6586x_gpio_exit);
+
+MODULE_ALIAS("platform:tps6586x-gpio");
+MODULE_DESCRIPTION("GPIO interface for TPS6586X PMIC");
+MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
+MODULE_LICENSE("GPL");