leds: atmel-pwm: remove obsolete driver

The leds-atmel-pwm driver is now obsolete. It is not used by any mainlined
boards and is replaced by the generic leds_pwm with the pwm-atmel driver using
the generic PWM framework.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Bryan Wu <cooloney@gmail.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index a1b044e7eaad3be2c0ae9ff1225ea698839b4847..8736f69262f9499ebe44167875f1800f1b1e03ce 100644 (file)
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -32,14 +32,6 @@ config LEDS_88PM860X
          This option enables support for on-chip LED drivers found on Marvell
          Semiconductor 88PM8606 PMIC.
 
-config LEDS_ATMEL_PWM
-       tristate "LED Support using Atmel PWM outputs"
-       depends on LEDS_CLASS
-       depends on ATMEL_PWM
-       help
-         This option enables support for LEDs driven using outputs
-         of the dedicated PWM controller found on newer Atmel SOCs.
-
 config LEDS_LM3530
        tristate "LCD Backlight driver for LM3530"
        depends on LEDS_CLASS

diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 79c5155199a7d409489d13633349d460123daa9f..3c036663f17b5f368f4afc5c5d8f9a992a511f0d 100644 (file)
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -6,7 +6,6 @@ obj-$(CONFIG_LEDS_TRIGGERS)             += led-triggers.o
 
 # LED Platform Drivers
 obj-$(CONFIG_LEDS_88PM860X)            += leds-88pm860x.o
-obj-$(CONFIG_LEDS_ATMEL_PWM)           += leds-atmel-pwm.o
 obj-$(CONFIG_LEDS_BD2802)              += leds-bd2802.o
 obj-$(CONFIG_LEDS_LOCOMO)              += leds-locomo.o
 obj-$(CONFIG_LEDS_LM3530)              += leds-lm3530.o

diff --git a/drivers/leds/leds-atmel-pwm.c b/drivers/leds/leds-atmel-pwm.c
deleted file mode 100644 (file)
index 56cec8d..0000000
--- a/drivers/leds/leds-atmel-pwm.c
+++ /dev/null
@@ -1,149 +0,0 @@
-#include <linux/kernel.h>
-#include <linux/platform_device.h>
-#include <linux/leds.h>
-#include <linux/io.h>
-#include <linux/atmel_pwm.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-
-
-struct pwmled {
-       struct led_classdev     cdev;
-       struct pwm_channel      pwmc;
-       struct gpio_led         *desc;
-       u32                     mult;
-       u8                      active_low;
-};
-
-
-/*
- * For simplicity, we use "brightness" as if it were a linear function
- * of PWM duty cycle.  However, a logarithmic function of duty cycle is
- * probably a better match for perceived brightness: two is half as bright
- * as four, four is half as bright as eight, etc
- */
-static void pwmled_brightness(struct led_classdev *cdev, enum led_brightness b)
-{
-       struct pwmled            *led;
-
-       /* update the duty cycle for the *next* period */
-       led = container_of(cdev, struct pwmled, cdev);
-       pwm_channel_writel(&led->pwmc, PWM_CUPD, led->mult * (unsigned) b);
-}
-
-/*
- * NOTE:  we reuse the platform_data structure of GPIO leds,
- * but repurpose its "gpio" number as a PWM channel number.
- */
-static int pwmled_probe(struct platform_device *pdev)
-{
-       const struct gpio_led_platform_data     *pdata;
-       struct pwmled                           *leds;
-       int                                     i;
-       int                                     status;
-
-       pdata = dev_get_platdata(&pdev->dev);
-       if (!pdata || pdata->num_leds < 1)
-               return -ENODEV;
-
-       leds = devm_kzalloc(&pdev->dev, pdata->num_leds * sizeof(*leds),
-                       GFP_KERNEL);
-       if (!leds)
-               return -ENOMEM;
-
-       for (i = 0; i < pdata->num_leds; i++) {
-               struct pwmled           *led = leds + i;
-               const struct gpio_led   *dat = pdata->leds + i;
-               u32                     tmp;
-
-               led->cdev.name = dat->name;
-               led->cdev.brightness = LED_OFF;
-               led->cdev.brightness_set = pwmled_brightness;
-               led->cdev.default_trigger = dat->default_trigger;
-
-               led->active_low = dat->active_low;
-
-               status = pwm_channel_alloc(dat->gpio, &led->pwmc);
-               if (status < 0)
-                       goto err;
-
-               /*
-                * Prescale clock by 2^x, so PWM counts in low MHz.
-                * Start each cycle with the LED active, so increasing
-                * the duty cycle gives us more time on (== brighter).
-                */
-               tmp = 5;
-               if (!led->active_low)
-                       tmp |= PWM_CPR_CPOL;
-               pwm_channel_writel(&led->pwmc, PWM_CMR, tmp);
-
-               /*
-                * Pick a period so PWM cycles at 100+ Hz; and a multiplier
-                * for scaling duty cycle:  brightness * mult.
-                */
-               tmp = (led->pwmc.mck / (1 << 5)) / 100;
-               tmp /= 255;
-               led->mult = tmp;
-               pwm_channel_writel(&led->pwmc, PWM_CDTY,
-                               led->cdev.brightness * 255);
-               pwm_channel_writel(&led->pwmc, PWM_CPRD,
-                               LED_FULL * tmp);
-
-               pwm_channel_enable(&led->pwmc);
-
-               /* Hand it over to the LED framework */
-               status = led_classdev_register(&pdev->dev, &led->cdev);
-               if (status < 0) {
-                       pwm_channel_free(&led->pwmc);
-                       goto err;
-               }
-       }
-
-       platform_set_drvdata(pdev, leds);
-       return 0;
-
-err:
-       if (i > 0) {
-               for (i = i - 1; i >= 0; i--) {
-                       led_classdev_unregister(&leds[i].cdev);
-                       pwm_channel_free(&leds[i].pwmc);
-               }
-       }
-
-       return status;
-}
-
-static int pwmled_remove(struct platform_device *pdev)
-{
-       const struct gpio_led_platform_data     *pdata;
-       struct pwmled                           *leds;
-       unsigned                                i;
-
-       pdata = dev_get_platdata(&pdev->dev);
-       leds = platform_get_drvdata(pdev);
-
-       for (i = 0; i < pdata->num_leds; i++) {
-               struct pwmled           *led = leds + i;
-
-               led_classdev_unregister(&led->cdev);
-               pwm_channel_free(&led->pwmc);
-       }
-
-       return 0;
-}
-
-static struct platform_driver pwmled_driver = {
-       .driver = {
-               .name =         "leds-atmel-pwm",
-               .owner =        THIS_MODULE,
-       },
-       /* REVISIT add suspend() and resume() methods */
-       .probe =        pwmled_probe,
-       .remove =       pwmled_remove,
-};
-
-module_platform_driver(pwmled_driver);
-
-MODULE_DESCRIPTION("Driver for LEDs with PWM-controlled brightness");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:leds-atmel-pwm");