tps65912: gpio: add gpio driver

TPS65912 has five GPIOs that can be configured for different purposes. Signed-off-by: Margarita Olaya Cabrera <magi@slimlogic.co.uk> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Liam Girdwood <lrg@ti.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

tps65912: gpio: add gpio driver
TPS65912 has five GPIOs that can be configured for different purposes. Signed-off-by: Margarita Olaya Cabrera <magi@slimlogic.co.uk> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Liam Girdwood <lrg@ti.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Margarita Olaya · Samuel Ortiz
1 parent d49a0f3f14
Showing 4 changed files with 164 additions and 0 deletions Side-by-side Diff
drivers/gpio/Kconfig
drivers/gpio/Makefile
drivers/gpio/gpio-tps65912.c
include/linux/mfd/tps65912.h
@@ -280,6 +280,12 @@
 	  This enables support for the GPIOs found on the TC3589X
 	  I/O Expander.
  
+config GPIO_TPS65912
+	tristate "TI TPS65912 GPIO"
+	depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI)
+	help
+	  This driver supports TPS65912 gpio chip
+
 config GPIO_TWL4030
 	tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
 	depends on TWL4030_CORE
@@ -48,6 +48,7 @@
 obj-$(CONFIG_ARCH_TEGRA)	+= gpio-tegra.o
 obj-$(CONFIG_GPIO_TIMBERDALE)	+= gpio-timberdale.o
 obj-$(CONFIG_GPIO_TPS65910)	+= gpio-tps65910.o
+obj-$(CONFIG_GPIO_TPS65912)	+= gpio-tps65912.o
 obj-$(CONFIG_GPIO_TWL4030)	+= gpio-twl4030.o
 obj-$(CONFIG_MACH_U300)		+= gpio-u300.o
 obj-$(CONFIG_GPIO_UCB1400)	+= gpio-ucb1400.o
+/*
+ * Copyright 2011 Texas Instruments Inc.
+ *
+ * Author: Margarita Olaya <magi@slimlogic.co.uk>
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under  the terms of the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the License, or (at your
+ *  option) any later version.
+ *
+ * This driver is based on wm8350 implementation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/gpio.h>
+#include <linux/mfd/core.h>
+#include <linux/platform_device.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/mfd/tps65912.h>
+
+struct tps65912_gpio_data {
+	struct tps65912 *tps65912;
+	struct gpio_chip gpio_chip;
+};
+
+static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
+{
+	struct tps65912 *tps65912 = container_of(gc, struct tps65912, gpio);
+	int val;
+
+	val = tps65912_reg_read(tps65912, TPS65912_GPIO1 + offset);
+
+	if (val & GPIO_STS_MASK)
+		return 1;
+
+	return 0;
+}
+
+static void tps65912_gpio_set(struct gpio_chip *gc, unsigned offset,
+			      int value)
+{
+	struct tps65912 *tps65912 = container_of(gc, struct tps65912, gpio);
+
+	if (value)
+		tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
+							GPIO_SET_MASK);
+	else
+		tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
+								GPIO_SET_MASK);
+}
+
+static int tps65912_gpio_output(struct gpio_chip *gc, unsigned offset,
+				int value)
+{
+	struct tps65912 *tps65912 = container_of(gc, struct tps65912, gpio);
+
+	/* Set the initial value */
+	tps65912_gpio_set(gc, offset, value);
+
+	return tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
+								GPIO_CFG_MASK);
+}
+
+static int tps65912_gpio_input(struct gpio_chip *gc, unsigned offset)
+{
+	struct tps65912 *tps65912 = container_of(gc, struct tps65912, gpio);
+
+	return tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
+								GPIO_CFG_MASK);
+
+}
+
+static struct gpio_chip template_chip = {
+	.label			= "tps65912",
+	.owner			= THIS_MODULE,
+	.direction_input	= tps65912_gpio_input,
+	.direction_output	= tps65912_gpio_output,
+	.get			= tps65912_gpio_get,
+	.set			= tps65912_gpio_set,
+	.can_sleep		= 1,
+	.ngpio			= 5,
+	.base			= -1,
+};
+
+static int __devinit tps65912_gpio_probe(struct platform_device *pdev)
+{
+	struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
+	struct tps65912_board *pdata = tps65912->dev->platform_data;
+	struct tps65912_gpio_data *tps65912_gpio;
+	int ret;
+
+	tps65912_gpio = kzalloc(sizeof(*tps65912_gpio), GFP_KERNEL);
+	if (tps65912_gpio == NULL)
+		return -ENOMEM;
+
+	tps65912_gpio->tps65912 = tps65912;
+	tps65912_gpio->gpio_chip = template_chip;
+	tps65912_gpio->gpio_chip.dev = &pdev->dev;
+	if (pdata && pdata->gpio_base)
+		tps65912_gpio->gpio_chip.base = pdata->gpio_base;
+
+	ret = gpiochip_add(&tps65912_gpio->gpio_chip);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Failed to register gpiochip, %d\n", ret);
+		goto err;
+	}
+
+	platform_set_drvdata(pdev, tps65912_gpio);
+
+	return ret;
+
+err:
+	kfree(tps65912_gpio);
+	return ret;
+}
+
+static int __devexit tps65912_gpio_remove(struct platform_device *pdev)
+{
+	struct tps65912_gpio_data  *tps65912_gpio = platform_get_drvdata(pdev);
+	int ret;
+
+	ret = gpiochip_remove(&tps65912_gpio->gpio_chip);
+	if (ret == 0)
+		kfree(tps65912_gpio);
+
+	return ret;
+}
+
+static struct platform_driver tps65912_gpio_driver = {
+	.driver = {
+		.name = "tps65912-gpio",
+		.owner = THIS_MODULE,
+	},
+	.probe = tps65912_gpio_probe,
+	.remove = __devexit_p(tps65912_gpio_remove),
+};
+
+static int __init tps65912_gpio_init(void)
+{
+	return platform_driver_register(&tps65912_gpio_driver);
+}
+subsys_initcall(tps65912_gpio_init);
+
+static void __exit tps65912_gpio_exit(void)
+{
+	platform_driver_unregister(&tps65912_gpio_driver);
+}
+module_exit(tps65912_gpio_exit);
+
+MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
+MODULE_DESCRIPTION("GPIO interface for TPS65912 PMICs");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:tps65912-gpio");
@@ -275,6 +275,7 @@
 	int is_dcdc4_avs;
 	int irq;
 	int irq_base;
+	int gpio_base;
 	struct regulator_init_data *tps65912_pmic_init_data;
 };
...	...	@@ -280,6 +280,12 @@
280	280	This enables support for the GPIOs found on the TC3589X
281	281	I/O Expander.
282	282
	283	+config GPIO_TPS65912
	284	+ tristate "TI TPS65912 GPIO"
	285	+ depends on (MFD_TPS65912_I2C \|\| MFD_TPS65912_SPI)
	286	+ help
	287	+ This driver supports TPS65912 gpio chip
	288	+
283	289	config GPIO_TWL4030
284	290	tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
285	291	depends on TWL4030_CORE
...	...	@@ -48,6 +48,7 @@
48	48	obj-$(CONFIG_ARCH_TEGRA) += gpio-tegra.o
49	49	obj-$(CONFIG_GPIO_TIMBERDALE) += gpio-timberdale.o
50	50	obj-$(CONFIG_GPIO_TPS65910) += gpio-tps65910.o
	51	+obj-$(CONFIG_GPIO_TPS65912) += gpio-tps65912.o
51	52	obj-$(CONFIG_GPIO_TWL4030) += gpio-twl4030.o
52	53	obj-$(CONFIG_MACH_U300) += gpio-u300.o
53	54	obj-$(CONFIG_GPIO_UCB1400) += gpio-ucb1400.o
	1	+/*
	2	+ * Copyright 2011 Texas Instruments Inc.
	3	+ *
	4	+ * Author: Margarita Olaya <magi@slimlogic.co.uk>
	5	+ *
	6	+ * This program is free software; you can redistribute it and/or modify it
	7	+ * under the terms of the GNU General Public License as published by the
	8	+ * Free Software Foundation; either version 2 of the License, or (at your
	9	+ * option) any later version.
	10	+ *
	11	+ * This driver is based on wm8350 implementation.
	12	+ */
	13	+
	14	+#include <linux/kernel.h>
	15	+#include <linux/module.h>
	16	+#include <linux/errno.h>
	17	+#include <linux/gpio.h>
	18	+#include <linux/mfd/core.h>
	19	+#include <linux/platform_device.h>
	20	+#include <linux/seq_file.h>
	21	+#include <linux/slab.h>
	22	+#include <linux/mfd/tps65912.h>
	23	+
	24	+struct tps65912_gpio_data {
	25	+ struct tps65912 *tps65912;
	26	+ struct gpio_chip gpio_chip;
	27	+};
	28	+
	29	+static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
	30	+{
	31	+ struct tps65912 *tps65912 = container_of(gc, struct tps65912, gpio);
	32	+ int val;
	33	+
	34	+ val = tps65912_reg_read(tps65912, TPS65912_GPIO1 + offset);
	35	+
	36	+ if (val & GPIO_STS_MASK)
	37	+ return 1;
	38	+
	39	+ return 0;
	40	+}
	41	+
	42	+static void tps65912_gpio_set(struct gpio_chip *gc, unsigned offset,
	43	+ int value)
	44	+{
	45	+ struct tps65912 *tps65912 = container_of(gc, struct tps65912, gpio);
	46	+
	47	+ if (value)
	48	+ tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
	49	+ GPIO_SET_MASK);
	50	+ else
	51	+ tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
	52	+ GPIO_SET_MASK);
	53	+}
	54	+
	55	+static int tps65912_gpio_output(struct gpio_chip *gc, unsigned offset,
	56	+ int value)
	57	+{
	58	+ struct tps65912 *tps65912 = container_of(gc, struct tps65912, gpio);
	59	+
	60	+ /* Set the initial value */
	61	+ tps65912_gpio_set(gc, offset, value);
	62	+
	63	+ return tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
	64	+ GPIO_CFG_MASK);
	65	+}
	66	+
	67	+static int tps65912_gpio_input(struct gpio_chip *gc, unsigned offset)
	68	+{
	69	+ struct tps65912 *tps65912 = container_of(gc, struct tps65912, gpio);
	70	+
	71	+ return tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
	72	+ GPIO_CFG_MASK);
	73	+
	74	+}
	75	+
	76	+static struct gpio_chip template_chip = {
	77	+ .label = "tps65912",
	78	+ .owner = THIS_MODULE,
	79	+ .direction_input = tps65912_gpio_input,
	80	+ .direction_output = tps65912_gpio_output,
	81	+ .get = tps65912_gpio_get,
	82	+ .set = tps65912_gpio_set,
	83	+ .can_sleep = 1,
	84	+ .ngpio = 5,
	85	+ .base = -1,
	86	+};
	87	+
	88	+static int __devinit tps65912_gpio_probe(struct platform_device *pdev)
	89	+{
	90	+ struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
	91	+ struct tps65912_board *pdata = tps65912->dev->platform_data;
	92	+ struct tps65912_gpio_data *tps65912_gpio;
	93	+ int ret;
	94	+
	95	+ tps65912_gpio = kzalloc(sizeof(*tps65912_gpio), GFP_KERNEL);
	96	+ if (tps65912_gpio == NULL)
	97	+ return -ENOMEM;
	98	+
	99	+ tps65912_gpio->tps65912 = tps65912;
	100	+ tps65912_gpio->gpio_chip = template_chip;
	101	+ tps65912_gpio->gpio_chip.dev = &pdev->dev;
	102	+ if (pdata && pdata->gpio_base)
	103	+ tps65912_gpio->gpio_chip.base = pdata->gpio_base;
	104	+
	105	+ ret = gpiochip_add(&tps65912_gpio->gpio_chip);
	106	+ if (ret < 0) {
	107	+ dev_err(&pdev->dev, "Failed to register gpiochip, %d\n", ret);
	108	+ goto err;
	109	+ }
	110	+
	111	+ platform_set_drvdata(pdev, tps65912_gpio);
	112	+
	113	+ return ret;
	114	+
	115	+err:
	116	+ kfree(tps65912_gpio);
	117	+ return ret;
	118	+}
	119	+
	120	+static int __devexit tps65912_gpio_remove(struct platform_device *pdev)
	121	+{
	122	+ struct tps65912_gpio_data *tps65912_gpio = platform_get_drvdata(pdev);
	123	+ int ret;
	124	+
	125	+ ret = gpiochip_remove(&tps65912_gpio->gpio_chip);
	126	+ if (ret == 0)
	127	+ kfree(tps65912_gpio);
	128	+
	129	+ return ret;
	130	+}
	131	+
	132	+static struct platform_driver tps65912_gpio_driver = {
	133	+ .driver = {
	134	+ .name = "tps65912-gpio",
	135	+ .owner = THIS_MODULE,
	136	+ },
	137	+ .probe = tps65912_gpio_probe,
	138	+ .remove = __devexit_p(tps65912_gpio_remove),
	139	+};
	140	+
	141	+static int __init tps65912_gpio_init(void)
	142	+{
	143	+ return platform_driver_register(&tps65912_gpio_driver);
	144	+}
	145	+subsys_initcall(tps65912_gpio_init);
	146	+
	147	+static void __exit tps65912_gpio_exit(void)
	148	+{
	149	+ platform_driver_unregister(&tps65912_gpio_driver);
	150	+}
	151	+module_exit(tps65912_gpio_exit);
	152	+
	153	+MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
	154	+MODULE_DESCRIPTION("GPIO interface for TPS65912 PMICs");
	155	+MODULE_LICENSE("GPL v2");
	156	+MODULE_ALIAS("platform:tps65912-gpio");
...	...	@@ -275,6 +275,7 @@
275	275	int is_dcdc4_avs;
276	276	int irq;
277	277	int irq_base;
	278	+ int gpio_base;
278	279	struct regulator_init_data *tps65912_pmic_init_data;
279	280	};
280	281