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authorLinus Torvalds <torvalds@linux-foundation.org>2013-02-24 20:00:58 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-24 20:00:58 -0800
commitab7826595e9ec51a51f622c5fc91e2f59440481a (patch)
tree34241b399fa7a12c260e06e6c1c31bc69d46e1e3 /drivers/gpio
parent21fbd5809ad126b949206d78e0a0e07ec872ea11 (diff)
parentff7109fa632654eaef657186f2942f5b679023d6 (diff)
downloadop-kernel-dev-ab7826595e9ec51a51f622c5fc91e2f59440481a.zip
op-kernel-dev-ab7826595e9ec51a51f622c5fc91e2f59440481a.tar.gz
Merge tag 'mfd-3.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
Pull MFS updates from Samuel Ortiz: "This is the MFD pull request for the 3.9 merge window. No new drivers this time, but a bunch of fairly big cleanups: - Roger Quadros worked on a OMAP USBHS and TLL platform data consolidation, OMAP5 support and clock management code cleanup. - The first step of a major sync for the ab8500 driver from Lee Jones. In particular, the debugfs and the sysct interfaces got extended and improved. - Peter Ujfalusi sent a nice patchset for cleaning and fixing the twl-core driver, with a much needed module id lookup code improvement. - The regular wm5102 and arizona cleanups and fixes from Mark Brown. - Laxman Dewangan extended the palmas APIs in order to implement the palmas GPIO and rt drivers. - Laxman also added DT support for the tps65090 driver. - The Intel SCH and ICH drivers got a couple fixes from Aaron Sierra and Darren Hart. - Linus Walleij patchset for the ab8500 driver allowed ab8500 and ab9540 based devices to switch to the new abx500 pin-ctrl driver. - The max8925 now has device tree and irqdomain support thanks to Qing Xu. - The recently added rtsx driver got a few cleanups and fixes for a better card detection code path and now also supports the RTS5227 chipset, thanks to Wei Wang and Roger Tseng." * tag 'mfd-3.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (109 commits) mfd: lpc_ich: Use devres API to allocate private data mfd: lpc_ich: Add Device IDs for Intel Wellsburg PCH mfd: lpc_sch: Accomodate partial population of the MFD devices mfd: da9052-i2c: Staticize da9052_i2c_fix() mfd: syscon: Fix sparse warning mfd: twl-core: Fix kernel panic on boot mfd: rtsx: Fix issue that booting OS with SD card inserted mfd: ab8500: Fix compile error mfd: Add missing GENERIC_HARDIRQS dependecies Documentation: Add docs for max8925 dt mfd: max8925: Add dts mfd: max8925: Support dt for backlight mfd: max8925: Fix onkey driver irq base mfd: max8925: Fix mfd device register failure mfd: max8925: Add irqdomain for dt mfd: vexpress: Allow vexpress-sysreg to self-initialise mfd: rtsx: Support RTS5227 mfd: rtsx: Implement driving adjustment to device-dependent callbacks mfd: vexpress: Add pseudo-GPIO based LEDs mfd: ab8500: Rename ab8500 to abx500 for hwmon driver ...
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/Kconfig7
-rw-r--r--drivers/gpio/Makefile1
-rw-r--r--drivers/gpio/gpio-palmas.c184
3 files changed, 192 insertions, 0 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index b89d250..74e17f1 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -657,6 +657,13 @@ config GPIO_JANZ_TTL
This driver provides support for driving the pins in output
mode only. Input mode is not supported.
+config GPIO_PALMAS
+ bool "TI PALMAS series PMICs GPIO"
+ depends on MFD_PALMAS
+ help
+ Select this option to enable GPIO driver for the TI PALMAS
+ series chip family.
+
config GPIO_TPS6586X
bool "TPS6586X GPIO"
depends on MFD_TPS6586X
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 45a388c..6dbcba2 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -68,6 +68,7 @@ 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-$(CONFIG_GPIO_PALMAS) += gpio-palmas.o
obj-$(CONFIG_GPIO_TPS6586X) += gpio-tps6586x.o
obj-$(CONFIG_GPIO_TPS65910) += gpio-tps65910.o
obj-$(CONFIG_GPIO_TPS65912) += gpio-tps65912.o
diff --git a/drivers/gpio/gpio-palmas.c b/drivers/gpio/gpio-palmas.c
new file mode 100644
index 0000000..e3a4e56
--- /dev/null
+++ b/drivers/gpio/gpio-palmas.c
@@ -0,0 +1,184 @@
+/*
+ * TI Palma series PMIC's GPIO driver.
+ *
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Author: Laxman Dewangan <ldewangan@nvidia.com>
+ *
+ * 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/gpio.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mfd/palmas.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+
+struct palmas_gpio {
+ struct gpio_chip gpio_chip;
+ struct palmas *palmas;
+};
+
+static inline struct palmas_gpio *to_palmas_gpio(struct gpio_chip *chip)
+{
+ return container_of(chip, struct palmas_gpio, gpio_chip);
+}
+
+static int palmas_gpio_get(struct gpio_chip *gc, unsigned offset)
+{
+ struct palmas_gpio *pg = to_palmas_gpio(gc);
+ struct palmas *palmas = pg->palmas;
+ unsigned int val;
+ int ret;
+
+ ret = palmas_read(palmas, PALMAS_GPIO_BASE, PALMAS_GPIO_DATA_IN, &val);
+ if (ret < 0) {
+ dev_err(gc->dev, "GPIO_DATA_IN read failed, err = %d\n", ret);
+ return ret;
+ }
+ return !!(val & BIT(offset));
+}
+
+static void palmas_gpio_set(struct gpio_chip *gc, unsigned offset,
+ int value)
+{
+ struct palmas_gpio *pg = to_palmas_gpio(gc);
+ struct palmas *palmas = pg->palmas;
+ int ret;
+
+ if (value)
+ ret = palmas_write(palmas, PALMAS_GPIO_BASE,
+ PALMAS_GPIO_SET_DATA_OUT, BIT(offset));
+ else
+ ret = palmas_write(palmas, PALMAS_GPIO_BASE,
+ PALMAS_GPIO_CLEAR_DATA_OUT, BIT(offset));
+ if (ret < 0)
+ dev_err(gc->dev, "%s write failed, err = %d\n",
+ (value) ? "GPIO_SET_DATA_OUT" : "GPIO_CLEAR_DATA_OUT",
+ ret);
+}
+
+static int palmas_gpio_output(struct gpio_chip *gc, unsigned offset,
+ int value)
+{
+ struct palmas_gpio *pg = to_palmas_gpio(gc);
+ struct palmas *palmas = pg->palmas;
+ int ret;
+
+ /* Set the initial value */
+ palmas_gpio_set(gc, offset, value);
+
+ ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE,
+ PALMAS_GPIO_DATA_DIR, BIT(offset), BIT(offset));
+ if (ret < 0)
+ dev_err(gc->dev, "GPIO_DATA_DIR write failed, err = %d\n", ret);
+ return ret;
+}
+
+static int palmas_gpio_input(struct gpio_chip *gc, unsigned offset)
+{
+ struct palmas_gpio *pg = to_palmas_gpio(gc);
+ struct palmas *palmas = pg->palmas;
+ int ret;
+
+ ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE,
+ PALMAS_GPIO_DATA_DIR, BIT(offset), 0);
+ if (ret < 0)
+ dev_err(gc->dev, "GPIO_DATA_DIR write failed, err = %d\n", ret);
+ return ret;
+}
+
+static int palmas_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
+{
+ struct palmas_gpio *pg = to_palmas_gpio(gc);
+ struct palmas *palmas = pg->palmas;
+
+ return palmas_irq_get_virq(palmas, PALMAS_GPIO_0_IRQ + offset);
+}
+
+static int palmas_gpio_probe(struct platform_device *pdev)
+{
+ struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
+ struct palmas_platform_data *palmas_pdata;
+ struct palmas_gpio *palmas_gpio;
+ int ret;
+
+ palmas_gpio = devm_kzalloc(&pdev->dev,
+ sizeof(*palmas_gpio), GFP_KERNEL);
+ if (!palmas_gpio) {
+ dev_err(&pdev->dev, "Could not allocate palmas_gpio\n");
+ return -ENOMEM;
+ }
+
+ palmas_gpio->palmas = palmas;
+ palmas_gpio->gpio_chip.owner = THIS_MODULE;
+ palmas_gpio->gpio_chip.label = dev_name(&pdev->dev);
+ palmas_gpio->gpio_chip.ngpio = 8;
+ palmas_gpio->gpio_chip.can_sleep = 1;
+ palmas_gpio->gpio_chip.direction_input = palmas_gpio_input;
+ palmas_gpio->gpio_chip.direction_output = palmas_gpio_output;
+ palmas_gpio->gpio_chip.to_irq = palmas_gpio_to_irq;
+ palmas_gpio->gpio_chip.set = palmas_gpio_set;
+ palmas_gpio->gpio_chip.get = palmas_gpio_get;
+ palmas_gpio->gpio_chip.dev = &pdev->dev;
+#ifdef CONFIG_OF_GPIO
+ palmas_gpio->gpio_chip.of_node = palmas->dev->of_node;
+#endif
+ palmas_pdata = dev_get_platdata(palmas->dev);
+ if (palmas_pdata && palmas_pdata->gpio_base)
+ palmas_gpio->gpio_chip.base = palmas_pdata->gpio_base;
+ else
+ palmas_gpio->gpio_chip.base = -1;
+
+ ret = gpiochip_add(&palmas_gpio->gpio_chip);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, palmas_gpio);
+ return ret;
+}
+
+static int palmas_gpio_remove(struct platform_device *pdev)
+{
+ struct palmas_gpio *palmas_gpio = platform_get_drvdata(pdev);
+
+ return gpiochip_remove(&palmas_gpio->gpio_chip);
+}
+
+static struct platform_driver palmas_gpio_driver = {
+ .driver.name = "palmas-gpio",
+ .driver.owner = THIS_MODULE,
+ .probe = palmas_gpio_probe,
+ .remove = palmas_gpio_remove,
+};
+
+static int __init palmas_gpio_init(void)
+{
+ return platform_driver_register(&palmas_gpio_driver);
+}
+subsys_initcall(palmas_gpio_init);
+
+static void __exit palmas_gpio_exit(void)
+{
+ platform_driver_unregister(&palmas_gpio_driver);
+}
+module_exit(palmas_gpio_exit);
+
+MODULE_ALIAS("platform:palmas-gpio");
+MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
+MODULE_DESCRIPTION("GPIO driver for TI Palmas series PMICs");
+MODULE_LICENSE("GPL v2");
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