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>

3 files changed, 0 insertions, 158 deletions

diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index a1b044e7eaad..8736f69262f9 100644
--- 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 79c5155199a7..3c036663f17b 100644
--- 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
index 56cec8d6a2ac..000000000000
--- 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");