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Message-ID: <1331641560.7058.1.camel@dhruva>
Date: Tue, 13 Mar 2012 17:56:00 +0530
From: Ashish Jangam <ashish.jangam@...tcummins.com>
To: Lars-Peter Clausen <lars@...afoo.de>
CC: <rpurdie@...ys.net>, <linux-kernel@...r.kernel.org>,
David Dajun Chen <Dajun.Chen@...semi.com>
Subject: Re: [PATCH] LEDS: LED module for DA9052/53 PMIC v2
Any update on below patch?
On Wed, 2012-02-22 at 18:39 +0530, Ashish Jangam wrote:
> LED Driver for Dialog Semiconductor DA9052/53 PMICs.
>
> Signed-off-by: David Dajun Chen <dchen@...semi.com>
> Signed-off-by: Ashish Jangam <ashish.jangam@...tcummins.com>
> ---
> drivers/leds/Kconfig | 8 ++
> drivers/leds/Makefile | 1 +
> drivers/leds/leds-da9052.c | 214 ++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 223 insertions(+), 0 deletions(-)
> create mode 100644 drivers/leds/leds-da9052.c
>
> diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
> index e2ac190..b826f88 100644
> --- a/drivers/leds/Kconfig
> +++ b/drivers/leds/Kconfig
> @@ -266,6 +266,14 @@ config LEDS_DA903X
> This option enables support for on-chip LED drivers found
> on Dialog Semiconductor DA9030/DA9034 PMICs.
>
> +config LEDS_DA9052
> + tristate "Dialog DA9052/DA9053 LEDS"
> + depends on LEDS_CLASS
> + depends on PMIC_DA9052
> + help
> + This option enables support for on-chip LED drivers found
> + on Dialog Semiconductor DA9052-BC and DA9053-AA/Bx PMICs.
> +
> config LEDS_DAC124S085
> tristate "LED Support for DAC124S085 SPI DAC"
> depends on LEDS_CLASS
> diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
> index fa0f428..479048f 100644
> --- a/drivers/leds/Makefile
> +++ b/drivers/leds/Makefile
> @@ -32,6 +32,7 @@ obj-$(CONFIG_LEDS_FSG) += leds-fsg.o
> obj-$(CONFIG_LEDS_PCA955X) += leds-pca955x.o
> obj-$(CONFIG_LEDS_PCA9633) += leds-pca9633.o
> obj-$(CONFIG_LEDS_DA903X) += leds-da903x.o
> +obj-$(CONFIG_LEDS_DA9052) += leds-da9052.o
> obj-$(CONFIG_LEDS_WM831X_STATUS) += leds-wm831x-status.o
> obj-$(CONFIG_LEDS_WM8350) += leds-wm8350.o
> obj-$(CONFIG_LEDS_PWM) += leds-pwm.o
> diff --git a/drivers/leds/leds-da9052.c b/drivers/leds/leds-da9052.c
> new file mode 100644
> index 0000000..15281b4
> --- /dev/null
> +++ b/drivers/leds/leds-da9052.c
> @@ -0,0 +1,214 @@
> +/*
> + * LED Driver for Dialog DA9052 PMICs.
> + *
> + * Copyright(c) 2012 Dialog Semiconductor Ltd.
> + *
> + * Author: David Dajun Chen <dchen@...semi.com>
> + *
> + * 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.
> + *
> + */
> +
> +#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/slab.h>
> +
> +#include <linux/mfd/da9052/reg.h>
> +#include <linux/mfd/da9052/da9052.h>
> +#include <linux/mfd/da9052/pdata.h>
> +
> +#define DA9052_OPENDRAIN_OUTPUT 2
> +#define DA9052_SET_HIGH_LVL_OUTPUT (1 << 3)
> +#define DA9052_MASK_UPPER_NIBBLE 0xF0
> +#define DA9052_MASK_LOWER_NIBBLE 0x0F
> +#define DA9052_NIBBLE_SHIFT 4
> +#define DA9052_MAX_BRIGHTNESS 0x5f
> +
> +struct da9052_led {
> + struct led_classdev cdev;
> + struct work_struct work;
> + struct da9052 *da9052;
> + unsigned char led_index;
> + unsigned char id;
> + int brightness;
> +};
> +
> +unsigned char led_reg[] = {
> + DA9052_LED_CONT_4_REG,
> + DA9052_LED_CONT_5_REG,
> +};
> +
> +static int da9052_set_led_brightness(struct da9052_led *led)
> +{
> + u8 val;
> + int error;
> +
> + val = (led->brightness & 0x7f) | DA9052_LED_CONT_DIM;
> +
> + error = da9052_reg_write(led->da9052, led_reg[led->led_index], val);
> + if (error < 0)
> + dev_err(led->da9052->dev, "Failed to set led brightness, %d\n",
> + error);
> + return error;
> +}
> +
> +static void da9052_led_work(struct work_struct *work)
> +{
> + struct da9052_led *led = container_of(work, struct da9052_led, work);
> +
> + da9052_set_led_brightness(led);
> +}
> +
> +static void da9052_led_set(struct led_classdev *led_cdev,
> + enum led_brightness value)
> +{
> + struct da9052_led *led;
> +
> + led = container_of(led_cdev, struct da9052_led, cdev);
> + led->brightness = value;
> + schedule_work(&led->work);
> +}
> +
> +static int da9052_configure_leds(struct da9052 *da9052)
> +{
> + int error;
> + unsigned char register_value = DA9052_OPENDRAIN_OUTPUT
> + | DA9052_SET_HIGH_LVL_OUTPUT;
> +
> + error = da9052_reg_update(da9052, DA9052_GPIO_14_15_REG,
> + DA9052_MASK_LOWER_NIBBLE,
> + register_value);
> +
> + if (error < 0) {
> + dev_err(da9052->dev, "Failed to write GPIO 14-15 reg, %d\n",
> + error);
> + return error;
> + }
> +
> + error = da9052_reg_update(da9052, DA9052_GPIO_14_15_REG,
> + DA9052_MASK_UPPER_NIBBLE,
> + register_value << DA9052_NIBBLE_SHIFT);
> + if (error < 0)
> + dev_err(da9052->dev, "Failed to write GPIO 14-15 reg, %d\n",
> + error);
> +
> + return error;
> +}
> +
> +static int __devinit da9052_led_probe(struct platform_device *pdev)
> +{
> + struct da9052_pdata *pdata;
> + struct da9052 *da9052;
> + struct led_platform_data *pled;
> + struct da9052_led *led = NULL;
> + int error = -ENODEV;
> + int i;
> +
> + da9052 = dev_get_drvdata(pdev->dev.parent);
> + pdata = da9052->dev->platform_data;
> + if (pdata == NULL) {
> + dev_err(&pdev->dev, "No platform data\n");
> + goto err;
> + }
> +
> + pled = pdata->pled;
> + if (pled == NULL) {
> + dev_err(&pdev->dev, "No platform data for LED\n");
> + goto err;
> + }
> +
> + led = devm_kzalloc(&pdev->dev,
> + sizeof(struct da9052_led) * pled->num_leds,
> + GFP_KERNEL);
> + if (led == NULL) {
> + dev_err(&pdev->dev, "Failed to alloc memory\n");
> + error = -ENOMEM;
> + goto err;
> + }
> +
> + for (i = 0; i < pled->num_leds; i++) {
> + led[i].cdev.name = pled->leds[i].name;
> + led[i].cdev.brightness_set = da9052_led_set;
> + led[i].cdev.brightness = LED_OFF;
> + led[i].cdev.max_brightness = DA9052_MAX_BRIGHTNESS;
> + led[i].brightness = LED_OFF;
> + led[i].led_index = pled->leds[i].flags;
> + led[i].da9052 = dev_get_drvdata(pdev->dev.parent);
> + INIT_WORK(&led[i].work, da9052_led_work);
> +
> + error = led_classdev_register(pdev->dev.parent, &led[i].cdev);
> + if (error) {
> + dev_err(&pdev->dev, "Failed to register led %d\n",
> + led[i].led_index);
> + goto err_register;
> + }
> +
> + error = da9052_set_led_brightness(&led[i]);
> + if (error) {
> + dev_err(&pdev->dev, "Unable to init led %d\n",
> + led[i].led_index);
> + continue;
> + }
> + }
> + error = da9052_configure_leds(led->da9052);
> + if (error) {
> + dev_err(&pdev->dev, "Failed to configure GPIO LED%d\n", error);
> + 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:
> + return error;
> +}
> +
> +static int __devexit da9052_led_remove(struct platform_device *pdev)
> +{
> + struct da9052_led *led = platform_get_drvdata(pdev);
> + struct da9052_pdata *pdata;
> + struct da9052 *da9052;
> + struct led_platform_data *pled;
> + int i;
> +
> + da9052 = dev_get_drvdata(pdev->dev.parent);
> + pdata = da9052->dev->platform_data;
> + pled = pdata->pled;
> +
> + for (i = 0; i < pled->num_leds; i++) {
> + led[i].brightness = 0;
> + da9052_set_led_brightness(&led[i]);
> + led_classdev_unregister(&led[i].cdev);
> + cancel_work_sync(&led[i].work);
> + }
> +
> + return 0;
> +}
> +
> +static struct platform_driver da9052_led_driver = {
> + .driver = {
> + .name = "da9052-leds",
> + .owner = THIS_MODULE,
> + },
> + .probe = da9052_led_probe,
> + .remove = __devexit_p(da9052_led_remove),
> +};
> +
> +module_platform_driver(da9052_led_driver);
> +
> +MODULE_AUTHOR("Dialog Semiconductor Ltd <dchen@...semi.com>");
> +MODULE_DESCRIPTION("LED driver for Dialog DA9052 PMIC");
> +MODULE_LICENSE("GPL");
>
--
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