[PATCH 1/2] mc13783: add LED support
Philippe Rétornaz
philippe.retornaz at epfl.ch
Mon May 17 12:40:22 EDT 2010
This adds basic led support for Freescale MC13783 PMIC.
Signed-off-by: Philippe Rétornaz <philippe.retornaz at epfl.ch>
---
drivers/leds/Kconfig | 7 +
drivers/leds/Makefile | 1 +
drivers/leds/leds-mc13783.c | 375 +++++++++++++++++++++++++++++++++++++++++++
drivers/mfd/mc13783-core.c | 4 +
include/linux/mfd/mc13783.h | 68 ++++++++
5 files changed, 455 insertions(+), 0 deletions(-)
create mode 100644 drivers/leds/leds-mc13783.c
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 505eb64..706386c 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -285,6 +285,13 @@ config LEDS_DELL_NETBOOKS
This adds support for the Latitude 2100 and similar
notebooks that have an external LED.
+config LEDS_MC13783
+ tristate "LED Support for MC13783 PMIC"
+ depends on MFD_MC13783
+ help
+ This option enable support for on-chip LED drivers found
+ on Freescale Semiconductor MC13783 PMIC.
+
config LEDS_TRIGGERS
bool "LED Trigger support"
help
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 0cd8b99..d084e3b 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -35,6 +35,7 @@ obj-$(CONFIG_LEDS_INTEL_SS4200) += leds-ss4200.o
obj-$(CONFIG_LEDS_LT3593) += leds-lt3593.o
obj-$(CONFIG_LEDS_ADP5520) += leds-adp5520.o
obj-$(CONFIG_LEDS_DELL_NETBOOKS) += dell-led.o
+obj-$(CONFIG_LEDS_MC13783) += leds-mc13783.o
# LED SPI Drivers
obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o
diff --git a/drivers/leds/leds-mc13783.c b/drivers/leds/leds-mc13783.c
new file mode 100644
index 0000000..c0427fd
--- /dev/null
+++ b/drivers/leds/leds-mc13783.c
@@ -0,0 +1,375 @@
+/*
+ * LEDs driver for Freescale MC13783
+ *
+ * Copyright (C) 2010 Philippe Rétornaz
+ *
+ * Based on leds-da903x:
+ * Copyright (C) 2008 Compulab, Ltd.
+ * Mike Rapoport <mike at compulab.co.il>
+ *
+ * Copyright (C) 2006-2008 Marvell International Ltd.
+ * Eric Miao <eric.miao at marvell.com>
+ *
+ * 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/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/workqueue.h>
+#include <linux/mfd/mc13783.h>
+#include <linux/mfd/mc13783-private.h>
+#include <linux/slab.h>
+
+struct mc13783_led {
+ struct led_classdev cdev;
+ struct work_struct work;
+ struct mc13783 *master;
+ enum led_brightness new_brightness;
+ int id;
+};
+
+#define BL_P_MASK 0xf
+#define MD_P_SHIFT 9
+#define AD_P_SHIFT 13
+#define KP_P_SHIFT 17
+#define TC_P_BASE_SHIFT 6
+#define TC_P_MASK 0x1f
+static void mc13783_led_work(struct work_struct *work)
+{
+ struct mc13783_led *led = container_of(work, struct mc13783_led, work);
+ int off;
+ int shift;
+ int bank;
+ int o;
+
+ mc13783_lock(led->master);
+ switch (led->id) {
+ case MC13783_LED_MD:
+ mc13783_reg_rmw(led->master, MC13783_REG_LED_CONTROL_2,
+ BL_P_MASK << MD_P_SHIFT,
+ (led->new_brightness >> 4) << MD_P_SHIFT);
+ break;
+ case MC13783_LED_AD:
+ mc13783_reg_rmw(led->master, MC13783_REG_LED_CONTROL_2,
+ BL_P_MASK << AD_P_SHIFT,
+ (led->new_brightness >> 4) << AD_P_SHIFT);
+ break;
+ case MC13783_LED_KP:
+ mc13783_reg_rmw(led->master, MC13783_REG_LED_CONTROL_2,
+ BL_P_MASK << KP_P_SHIFT,
+ (led->new_brightness >> 4) << KP_P_SHIFT);
+ break;
+ case MC13783_LED_R1:
+ case MC13783_LED_G1:
+ case MC13783_LED_B1:
+ case MC13783_LED_R2:
+ case MC13783_LED_G2:
+ case MC13783_LED_B2:
+ case MC13783_LED_R3:
+ case MC13783_LED_G3:
+ case MC13783_LED_B3:
+ o = led->id - MC13783_LED_R1;
+ bank = o/3;
+ off = MC13783_REG_LED_CONTROL_3 + o/3;
+ shift = (o - bank * 3) * 5 + TC_P_BASE_SHIFT;
+ mc13783_reg_rmw(led->master, off, TC_P_MASK << shift,
+ (led->new_brightness >> 3) << shift);
+
+ break;
+ }
+ mc13783_unlock(led->master);
+}
+
+static void mc13783_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct mc13783_led *led;
+
+ led = container_of(led_cdev, struct mc13783_led, cdev);
+ led->new_brightness = value;
+ schedule_work(&led->work);
+}
+
+#define BL_C_MASK 0x7
+#define MD_C_SHIFT 0
+#define AD_C_SHIFT 3
+#define KP_C_SHIFT 6
+#define TC_C_MASK 0x3
+static int __devinit mc13783_led_setup(struct mc13783_led *led, int max_current)
+{
+ int off;
+ int shift;
+ int ret;
+ int bank;
+ mc13783_lock(led->master);
+
+ switch (led->id) {
+ case MC13783_LED_MD:
+ ret = mc13783_reg_rmw(led->master, MC13783_REG_LED_CONTROL_2,
+ BL_C_MASK << MD_C_SHIFT,
+ (max_current & BL_C_MASK) << MD_C_SHIFT);
+ break;
+ case MC13783_LED_AD:
+ ret = mc13783_reg_rmw(led->master, MC13783_REG_LED_CONTROL_2,
+ BL_C_MASK << AD_C_SHIFT,
+ (max_current & BL_C_MASK) << AD_C_SHIFT);
+ break;
+ case MC13783_LED_KP:
+ ret = mc13783_reg_rmw(led->master, MC13783_REG_LED_CONTROL_2,
+ BL_C_MASK << KP_C_SHIFT,
+ (max_current & BL_C_MASK) << KP_C_SHIFT);
+ break;
+ case MC13783_LED_R1:
+ case MC13783_LED_G1:
+ case MC13783_LED_B1:
+ case MC13783_LED_R2:
+ case MC13783_LED_G2:
+ case MC13783_LED_B2:
+ case MC13783_LED_R3:
+ case MC13783_LED_G3:
+ case MC13783_LED_B3:
+ bank = (led->id - MC13783_LED_R1)/3;
+ off = MC13783_REG_LED_CONTROL_3 + bank;
+ shift = ((led->id - MC13783_LED_R1) - bank * 3) * 2;
+
+ ret = mc13783_reg_rmw(led->master, off, TC_C_MASK << shift,
+ (max_current & TC_C_MASK) << shift);
+ break;
+ }
+
+ mc13783_unlock(led->master);
+ return ret;
+}
+
+#define TC1HALF_BIT 18
+#define SLEWLIM_BIT 23
+#define TRIODE_TC_BIT 23
+#define TRIODE_MD_BIT 7
+#define TRIODE_AD_BIT 8
+#define TRIODE_KP_BIT 9
+#define BOOST_BIT 10
+#define PERIOD_MASK 0x3
+#define PERIOD_SHIFT 21
+#define ABMODE_MASK 0x7
+#define ABMODE_SHIFT 11
+#define ABREF_MASK 0x3
+#define ABREF_SHIFT 14
+static int __devinit mc13783_leds_prepare(struct platform_device *pdev)
+{
+ struct mc13783_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct mc13783 *dev = dev_get_drvdata(pdev->dev.parent);
+ int ret = 0;
+ int reg = 0;
+
+ mc13783_lock(dev);
+
+ if (pdata->flags & MC13783_LED_TC1HALF)
+ reg |= 1 << TC1HALF_BIT;
+
+ if (pdata->flags & MC13783_LED_SLEWLIMTC)
+ reg |= 1 << SLEWLIM_BIT;
+
+ ret = mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_1, reg);
+ if (ret)
+ goto out;
+
+ reg = (pdata->bl_period & PERIOD_MASK) << PERIOD_SHIFT;
+
+ if (pdata->flags & MC13783_LED_SLEWLIMBL)
+ reg |= 1 << SLEWLIM_BIT;
+
+ ret = mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_2, reg);
+ if (ret)
+ goto out;
+
+
+ reg = (pdata->tc1_period & PERIOD_MASK) << PERIOD_SHIFT;
+ if (pdata->flags & MC13783_LED_TRIODE_TC1)
+ reg |= 1 << TRIODE_TC_BIT;
+
+ ret = mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_3, reg);
+ if (ret)
+ goto out;
+
+ reg = (pdata->tc2_period & PERIOD_MASK) << PERIOD_SHIFT;
+ if (pdata->flags & MC13783_LED_TRIODE_TC2)
+ reg |= 1 << TRIODE_TC_BIT;
+
+ ret = mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_4, reg);
+ if (ret)
+ goto out;
+
+ reg = (pdata->tc3_period & PERIOD_MASK) << PERIOD_SHIFT;
+ if (pdata->flags & MC13783_LED_TRIODE_TC3)
+ reg |= 1 << TRIODE_TC_BIT;
+
+ ret = mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_5, reg);
+ if (ret)
+ goto out;
+
+ reg = 1;
+ if (pdata->flags & MC13783_LED_TRIODE_MD)
+ reg |= 1 << TRIODE_MD_BIT;
+ if (pdata->flags & MC13783_LED_TRIODE_AD)
+ reg |= 1 << TRIODE_AD_BIT;
+ if (pdata->flags & MC13783_LED_TRIODE_KP)
+ reg |= 1 << TRIODE_KP_BIT;
+ if (pdata->flags & MC13783_LED_BOOST_EN)
+ reg |= 1 << BOOST_BIT;
+
+ reg |= (pdata->abmode & ABMODE_MASK) << ABMODE_SHIFT;
+ reg |= (pdata->abref & ABREF_MASK) << ABREF_SHIFT;
+
+ ret = mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_0, reg);
+
+out:
+ mc13783_unlock(dev);
+ return ret;
+}
+
+static int __devinit mc13783_led_probe(struct platform_device *pdev)
+{
+ struct mc13783_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct mc13783_led_platform_data *led_cur;
+ struct mc13783_led *led, *led_dat;
+ int ret, i;
+ int init_led = 0;
+
+ if (pdata == NULL) {
+ dev_err(&pdev->dev, "missing platform data\n");
+ return -ENODEV;
+ }
+
+ if (pdata->num_leds < 1 || pdata->num_leds > MC13783_LED_MAX) {
+ dev_err(&pdev->dev, "Invalid led count %d\n", pdata->num_leds);
+ return -EINVAL;
+ }
+
+ led = kzalloc(sizeof(*led) * pdata->num_leds, GFP_KERNEL);
+ if (led == NULL) {
+ dev_err(&pdev->dev, "failed to alloc memory\n");
+ return -ENOMEM;
+ }
+
+ ret = mc13783_leds_prepare(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "unable to init led driver\n");
+ goto err_free;
+ }
+
+ for (i = 0; i < pdata->num_leds; i++) {
+ led_dat = &led[i];
+ led_cur = &pdata->led[i];
+
+ if (led_cur->id > MC13783_LED_MAX || led_cur->id < 0) {
+ dev_err(&pdev->dev, "invalid id %d\n", led_cur->id);
+ ret = -EINVAL;
+ goto err_register;
+ }
+
+ if (init_led & (1 << led_cur->id)) {
+ dev_err(&pdev->dev, "led %d already initialized\n",
+ led_cur->id);
+ ret = -EINVAL;
+ goto err_register;
+ }
+
+ init_led |= 1 << led_cur->id;
+ led_dat->cdev.name = led_cur->name;
+ led_dat->cdev.default_trigger = led_cur->default_trigger;
+ led_dat->cdev.brightness_set = mc13783_led_set;
+ led_dat->cdev.brightness = LED_OFF;
+ led_dat->id = led_cur->id;
+ led_dat->master = dev_get_drvdata(pdev->dev.parent);
+
+ INIT_WORK(&led_dat->work, mc13783_led_work);
+
+ ret = led_classdev_register(pdev->dev.parent, &led_dat->cdev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register led %d\n",
+ led_dat->id);
+ goto err_register;
+ }
+
+ ret = mc13783_led_setup(led_dat, led_cur->max_current);
+ if (ret) {
+ dev_err(&pdev->dev, "unable to init led %d\n",
+ led_dat->id);
+ i++;
+ goto err_register;
+ }
+ }
+
+ platform_set_drvdata(pdev, led);
+ return 0;
+
+err_register:
+ if (i > 0) {
+ for (i = i - 1; i >= 0; i--) {
+ led_classdev_unregister(&led[i].cdev);
+ cancel_work_sync(&led[i].work);
+ }
+ }
+
+err_free:
+ kfree(led);
+ return ret;
+}
+
+static int __devexit mc13783_led_remove(struct platform_device *pdev)
+{
+ struct mc13783_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct mc13783_led *led = platform_get_drvdata(pdev);
+ struct mc13783 *dev = dev_get_drvdata(pdev->dev.parent);
+ int i;
+
+ for (i = 0; i < pdata->num_leds; i++) {
+ led_classdev_unregister(&led[i].cdev);
+ cancel_work_sync(&led[i].work);
+ }
+
+ mc13783_lock(dev);
+
+ mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_0, 0);
+ mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_1, 0);
+ mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_2, 0);
+ mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_3, 0);
+ mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_4, 0);
+ mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_5, 0);
+
+ mc13783_unlock(dev);
+
+ kfree(led);
+ return 0;
+}
+
+static struct platform_driver mc13783_led_driver = {
+ .driver = {
+ .name = "mc13783-led",
+ .owner = THIS_MODULE,
+ },
+ .probe = mc13783_led_probe,
+ .remove = __devexit_p(mc13783_led_remove),
+};
+
+static int __init mc13783_led_init(void)
+{
+ return platform_driver_register(&mc13783_led_driver);
+}
+module_init(mc13783_led_init);
+
+static void __exit mc13783_led_exit(void)
+{
+ platform_driver_unregister(&mc13783_led_driver);
+}
+module_exit(mc13783_led_exit);
+
+MODULE_DESCRIPTION("LEDs driver for Freescale MC13783 PMIC");
+MODULE_AUTHOR("Philipe Rétornaz <philippe.retorna at epfl.ch>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:mc13783-led");
diff --git a/drivers/mfd/mc13783-core.c b/drivers/mfd/mc13783-core.c
index 1f68eca..fecf38a 100644
--- a/drivers/mfd/mc13783-core.c
+++ b/drivers/mfd/mc13783-core.c
@@ -679,6 +679,10 @@ err_revision:
if (pdata->flags & MC13783_USE_TOUCHSCREEN)
mc13783_add_subdevice(mc13783, "mc13783-ts");
+ if (pdata->flags & MC13783_USE_LED)
+ mc13783_add_subdevice_pdata(mc13783, "mc13783-led",
+ pdata->leds, sizeof(*pdata->leds));
+
return 0;
}
diff --git a/include/linux/mfd/mc13783.h b/include/linux/mfd/mc13783.h
index 8895d9d..95aa8b6 100644
--- a/include/linux/mfd/mc13783.h
+++ b/include/linux/mfd/mc13783.h
@@ -64,6 +64,72 @@ static inline int mc13783_ackirq(struct mc13783 *mc13783, int irq)
MC13783_ADC0_TSMOD1 | \
MC13783_ADC0_TSMOD2)
+struct mc13783_led_platform_data {
+#define MC13783_LED_MD 0
+#define MC13783_LED_AD 1
+#define MC13783_LED_KP 2
+#define MC13783_LED_R1 3
+#define MC13783_LED_G1 4
+#define MC13783_LED_B1 5
+#define MC13783_LED_R2 6
+#define MC13783_LED_G2 7
+#define MC13783_LED_B2 8
+#define MC13783_LED_R3 9
+#define MC13783_LED_G3 10
+#define MC13783_LED_B3 11
+#define MC13783_LED_MAX MC13783_LED_B3
+ int id;
+ const char *name;
+ const char *default_trigger;
+
+/* Three or two bits current selection depending on the led */
+ char max_current;
+};
+
+struct mc13783_leds_platform_data {
+ int num_leds;
+ struct mc13783_led_platform_data *led;
+
+#define MC13783_LED_TRIODE_MD (1 << 0)
+#define MC13783_LED_TRIODE_AD (1 << 1)
+#define MC13783_LED_TRIODE_KP (1 << 2)
+#define MC13783_LED_BOOST_EN (1 << 3)
+#define MC13783_LED_TC1HALF (1 << 4)
+#define MC13783_LED_SLEWLIMTC (1 << 5)
+#define MC13783_LED_SLEWLIMBL (1 << 6)
+#define MC13783_LED_TRIODE_TC1 (1 << 7)
+#define MC13783_LED_TRIODE_TC2 (1 << 8)
+#define MC13783_LED_TRIODE_TC3 (1 << 9)
+ int flags;
+
+#define MC13783_LED_AB_DISABLED 0
+#define MC13783_LED_AB_MD1 1
+#define MC13783_LED_AB_MD12 2
+#define MC13783_LED_AB_MD123 3
+#define MC13783_LED_AB_MD1234 4
+#define MC13783_LED_AB_MD1234_AD1 5
+#define MC13783_LED_AB_MD1234_AD12 6
+#define MC13783_LED_AB_MD1_AD 7
+ char abmode;
+
+#define MC13783_LED_ABREF_200MV 0
+#define MC13783_LED_ABREF_400MV 1
+#define MC13783_LED_ABREF_600MV 2
+#define MC13783_LED_ABREF_800MV 3
+ char abref;
+
+#define MC13783_LED_PERIOD_10MS 0
+#define MC13783_LED_PERIOD_100MS 1
+#define MC13783_LED_PERIOD_500MS 2
+#define MC13783_LED_PERIOD_2S 3
+ char bl_period;
+ char tc1_period;
+ char tc2_period;
+ char tc3_period;
+};
+
+
+
/* to be cleaned up */
struct regulator_init_data;
@@ -80,12 +146,14 @@ struct mc13783_regulator_platform_data {
struct mc13783_platform_data {
int num_regulators;
struct mc13783_regulator_init_data *regulators;
+ struct mc13783_leds_platform_data *leds;
#define MC13783_USE_TOUCHSCREEN (1 << 0)
#define MC13783_USE_CODEC (1 << 1)
#define MC13783_USE_ADC (1 << 2)
#define MC13783_USE_RTC (1 << 3)
#define MC13783_USE_REGULATOR (1 << 4)
+#define MC13783_USE_LED (1 << 5)
unsigned int flags;
};
--
1.6.3.3
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