leds: Add mc13783 LED support
This add basic led support for Freescale MC13783 PMIC.
Signed-off-by: Philippe Rétornaz <philippe.retornaz@epfl.ch>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index ecb6932..f98d17a 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -295,6 +295,13 @@
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 77119f2..2493de4 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -36,6 +36,7 @@
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..f05bb08
--- /dev/null
+++ b/drivers/leds/leds-mc13783.c
@@ -0,0 +1,403 @@
+/*
+ * LEDs driver for Freescale MC13783
+ *
+ * Copyright (C) 2010 Philippe Rétornaz
+ *
+ * Based on leds-da903x:
+ * Copyright (C) 2008 Compulab, Ltd.
+ * Mike Rapoport <mike@compulab.co.il>
+ *
+ * Copyright (C) 2006-2008 Marvell International Ltd.
+ * Eric Miao <eric.miao@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/slab.h>
+
+struct mc13783_led {
+ struct led_classdev cdev;
+ struct work_struct work;
+ struct mc13783 *master;
+ enum led_brightness new_brightness;
+ int id;
+};
+
+#define MC13783_REG_LED_CONTROL_0 51
+#define MC13783_LED_C0_ENABLE_BIT (1 << 0)
+#define MC13783_LED_C0_TRIODE_MD_BIT (1 << 7)
+#define MC13783_LED_C0_TRIODE_AD_BIT (1 << 8)
+#define MC13783_LED_C0_TRIODE_KP_BIT (1 << 9)
+#define MC13783_LED_C0_BOOST_BIT (1 << 10)
+#define MC13783_LED_C0_ABMODE_MASK 0x7
+#define MC13783_LED_C0_ABMODE 11
+#define MC13783_LED_C0_ABREF_MASK 0x3
+#define MC13783_LED_C0_ABREF 14
+
+#define MC13783_REG_LED_CONTROL_1 52
+#define MC13783_LED_C1_TC1HALF_BIT (1 << 18)
+
+#define MC13783_REG_LED_CONTROL_2 53
+#define MC13783_LED_C2_BL_P_MASK 0xf
+#define MC13783_LED_C2_MD_P 9
+#define MC13783_LED_C2_AD_P 13
+#define MC13783_LED_C2_KP_P 17
+#define MC13783_LED_C2_BL_C_MASK 0x7
+#define MC13783_LED_C2_MD_C 0
+#define MC13783_LED_C2_AD_C 3
+#define MC13783_LED_C2_KP_C 6
+
+#define MC13783_REG_LED_CONTROL_3 54
+#define MC13783_LED_C3_TC_P 6
+#define MC13783_LED_C3_TC_P_MASK 0x1f
+
+#define MC13783_REG_LED_CONTROL_4 55
+#define MC13783_REG_LED_CONTROL_5 56
+
+#define MC13783_LED_Cx_PERIOD 21
+#define MC13783_LED_Cx_PERIOD_MASK 0x3
+#define MC13783_LED_Cx_SLEWLIM_BIT (1 << 23)
+#define MC13783_LED_Cx_TRIODE_TC_BIT (1 << 23)
+#define MC13783_LED_Cx_TC_C_MASK 0x3
+
+static void mc13783_led_work(struct work_struct *work)
+{
+ struct mc13783_led *led = container_of(work, struct mc13783_led, work);
+ int reg = 0;
+ int mask = 0;
+ int value = 0;
+ int bank, off, shift;
+
+ switch (led->id) {
+ case MC13783_LED_MD:
+ reg = MC13783_REG_LED_CONTROL_2;
+ mask = MC13783_LED_C2_BL_P_MASK << MC13783_LED_C2_MD_P;
+ value = (led->new_brightness >> 4) << MC13783_LED_C2_MD_P;
+ break;
+ case MC13783_LED_AD:
+ reg = MC13783_REG_LED_CONTROL_2;
+ mask = MC13783_LED_C2_BL_P_MASK << MC13783_LED_C2_AD_P;
+ value = (led->new_brightness >> 4) << MC13783_LED_C2_AD_P;
+ break;
+ case MC13783_LED_KP:
+ reg = MC13783_REG_LED_CONTROL_2;
+ mask = MC13783_LED_C2_BL_P_MASK << MC13783_LED_C2_KP_P;
+ value = (led->new_brightness >> 4) << MC13783_LED_C2_KP_P;
+ 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:
+ off = led->id - MC13783_LED_R1;
+ bank = off/3;
+ reg = MC13783_REG_LED_CONTROL_3 + off/3;
+ shift = (off - bank * 3) * 5 + MC13783_LED_C3_TC_P;
+ value = (led->new_brightness >> 3) << shift;
+ mask = MC13783_LED_C3_TC_P_MASK << shift;
+ break;
+ }
+
+ mc13783_lock(led->master);
+
+ mc13783_reg_rmw(led->master, reg, mask, value);
+
+ 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);
+}
+
+static int __devinit mc13783_led_setup(struct mc13783_led *led, int max_current)
+{
+ int shift = 0;
+ int mask = 0;
+ int value = 0;
+ int reg = 0;
+ int ret, bank;
+
+ switch (led->id) {
+ case MC13783_LED_MD:
+ shift = MC13783_LED_C2_MD_C;
+ mask = MC13783_LED_C2_BL_C_MASK;
+ value = max_current & MC13783_LED_C2_BL_C_MASK;
+ reg = MC13783_REG_LED_CONTROL_2;
+ break;
+ case MC13783_LED_AD:
+ shift = MC13783_LED_C2_AD_C;
+ mask = MC13783_LED_C2_BL_C_MASK;
+ value = max_current & MC13783_LED_C2_BL_C_MASK;
+ reg = MC13783_REG_LED_CONTROL_2;
+ break;
+ case MC13783_LED_KP:
+ shift = MC13783_LED_C2_KP_C;
+ mask = MC13783_LED_C2_BL_C_MASK;
+ value = max_current & MC13783_LED_C2_BL_C_MASK;
+ reg = MC13783_REG_LED_CONTROL_2;
+ 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;
+ reg = MC13783_REG_LED_CONTROL_3 + bank;
+ shift = ((led->id - MC13783_LED_R1) - bank * 3) * 2;
+ mask = MC13783_LED_Cx_TC_C_MASK;
+ value = max_current & MC13783_LED_Cx_TC_C_MASK;
+ break;
+ }
+
+ mc13783_lock(led->master);
+
+ ret = mc13783_reg_rmw(led->master, reg, mask << shift,
+ value << shift);
+
+ mc13783_unlock(led->master);
+ return ret;
+}
+
+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 |= MC13783_LED_C1_TC1HALF_BIT;
+
+ if (pdata->flags & MC13783_LED_SLEWLIMTC)
+ reg |= MC13783_LED_Cx_SLEWLIM_BIT;
+
+ ret = mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_1, reg);
+ if (ret)
+ goto out;
+
+ reg = (pdata->bl_period & MC13783_LED_Cx_PERIOD_MASK) <<
+ MC13783_LED_Cx_PERIOD;
+
+ if (pdata->flags & MC13783_LED_SLEWLIMBL)
+ reg |= MC13783_LED_Cx_SLEWLIM_BIT;
+
+ ret = mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_2, reg);
+ if (ret)
+ goto out;
+
+ reg = (pdata->tc1_period & MC13783_LED_Cx_PERIOD_MASK) <<
+ MC13783_LED_Cx_PERIOD;
+
+ if (pdata->flags & MC13783_LED_TRIODE_TC1)
+ reg |= MC13783_LED_Cx_TRIODE_TC_BIT;
+
+ ret = mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_3, reg);
+ if (ret)
+ goto out;
+
+ reg = (pdata->tc2_period & MC13783_LED_Cx_PERIOD_MASK) <<
+ MC13783_LED_Cx_PERIOD;
+
+ if (pdata->flags & MC13783_LED_TRIODE_TC2)
+ reg |= MC13783_LED_Cx_TRIODE_TC_BIT;
+
+ ret = mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_4, reg);
+ if (ret)
+ goto out;
+
+ reg = (pdata->tc3_period & MC13783_LED_Cx_PERIOD_MASK) <<
+ MC13783_LED_Cx_PERIOD;
+
+ if (pdata->flags & MC13783_LED_TRIODE_TC3)
+ reg |= MC13783_LED_Cx_TRIODE_TC_BIT;;
+
+ ret = mc13783_reg_write(dev, MC13783_REG_LED_CONTROL_5, reg);
+ if (ret)
+ goto out;
+
+ reg = MC13783_LED_C0_ENABLE_BIT;
+ if (pdata->flags & MC13783_LED_TRIODE_MD)
+ reg |= MC13783_LED_C0_TRIODE_MD_BIT;
+ if (pdata->flags & MC13783_LED_TRIODE_AD)
+ reg |= MC13783_LED_C0_TRIODE_AD_BIT;
+ if (pdata->flags & MC13783_LED_TRIODE_KP)
+ reg |= MC13783_LED_C0_TRIODE_KP_BIT;
+ if (pdata->flags & MC13783_LED_BOOST_EN)
+ reg |= MC13783_LED_C0_BOOST_BIT;
+
+ reg |= (pdata->abmode & MC13783_LED_C0_ABMODE_MASK) <<
+ MC13783_LED_C0_ABMODE;
+ reg |= (pdata->abref & MC13783_LED_C0_ABREF_MASK) <<
+ MC13783_LED_C0_ABREF;
+
+ 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:
+ 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("Philippe Retornaz <philippe.retornaz@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 @@
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;
}