backlight: atmel-pwm-bl: remove obsolete driver

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

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

4 files changed, 0 insertions, 278 deletions

diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 5d449059a556..c3c18339b8cb 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -178,17 +178,6 @@ config BACKLIGHT_ATMEL_LCDC
           If in doubt, it's safe to enable this option; it doesn't kick
           in unless the board's description says it's wired that way.
 
-config BACKLIGHT_ATMEL_PWM
-        tristate "Atmel PWM backlight control"
-        depends on ATMEL_PWM
-        help
-          Say Y here if you want to use the PWM peripheral in Atmel AT91 and
-          AVR32 devices. This driver will need additional platform data to know
-          which PWM instance to use and how to configure it.
-
-          To compile this driver as a module, choose M here: the module will be
-          called atmel-pwm-bl.
-
 config BACKLIGHT_EP93XX
         tristate "Cirrus EP93xx Backlight Driver"
         depends on FB_EP93XX
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
index bb820024f346..351451dbb607 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -25,7 +25,6 @@ obj-$(CONFIG_BACKLIGHT_ADP8860)		+= adp8860_bl.o
 obj-$(CONFIG_BACKLIGHT_ADP8870)         += adp8870_bl.o
 obj-$(CONFIG_BACKLIGHT_APPLE)           += apple_bl.o
 obj-$(CONFIG_BACKLIGHT_AS3711)          += as3711_bl.o
-obj-$(CONFIG_BACKLIGHT_ATMEL_PWM)       += atmel-pwm-bl.o
 obj-$(CONFIG_BACKLIGHT_BD6107)          += bd6107.o
 obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH)   += cr_bllcd.o
 obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE)    += backlight.o
diff --git a/drivers/video/backlight/atmel-pwm-bl.c b/drivers/video/backlight/atmel-pwm-bl.c
deleted file mode 100644
index 261b1a4ec3d8..000000000000
--- a/drivers/video/backlight/atmel-pwm-bl.c
+++ /dev/null
@@ -1,223 +0,0 @@
-/*
- * Copyright (C) 2008 Atmel Corporation
- *
- * Backlight driver using Atmel PWM peripheral.
- *
- * 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/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/fb.h>
-#include <linux/gpio.h>
-#include <linux/backlight.h>
-#include <linux/atmel_pwm.h>
-#include <linux/atmel-pwm-bl.h>
-#include <linux/slab.h>
-
-struct atmel_pwm_bl {
-        const struct atmel_pwm_bl_platform_data *pdata;
-        struct backlight_device                 *bldev;
-        struct platform_device                  *pdev;
-        struct pwm_channel                      pwmc;
-        int                                     gpio_on;
-};
-
-static void atmel_pwm_bl_set_gpio_on(struct atmel_pwm_bl *pwmbl, int on)
-{
-        if (!gpio_is_valid(pwmbl->gpio_on))
-                return;
-
-        gpio_set_value(pwmbl->gpio_on, on ^ pwmbl->pdata->on_active_low);
-}
-
-static int atmel_pwm_bl_set_intensity(struct backlight_device *bd)
-{
-        struct atmel_pwm_bl *pwmbl = bl_get_data(bd);
-        int intensity = bd->props.brightness;
-        int pwm_duty;
-
-        if (bd->props.power != FB_BLANK_UNBLANK)
-                intensity = 0;
-        if (bd->props.fb_blank != FB_BLANK_UNBLANK)
-                intensity = 0;
-
-        if (pwmbl->pdata->pwm_active_low)
-                pwm_duty = pwmbl->pdata->pwm_duty_min + intensity;
-        else
-                pwm_duty = pwmbl->pdata->pwm_duty_max - intensity;
-
-        if (pwm_duty > pwmbl->pdata->pwm_duty_max)
-                pwm_duty = pwmbl->pdata->pwm_duty_max;
-        if (pwm_duty < pwmbl->pdata->pwm_duty_min)
-                pwm_duty = pwmbl->pdata->pwm_duty_min;
-
-        if (!intensity) {
-                atmel_pwm_bl_set_gpio_on(pwmbl, 0);
-                pwm_channel_writel(&pwmbl->pwmc, PWM_CUPD, pwm_duty);
-                pwm_channel_disable(&pwmbl->pwmc);
-        } else {
-                pwm_channel_enable(&pwmbl->pwmc);
-                pwm_channel_writel(&pwmbl->pwmc, PWM_CUPD, pwm_duty);
-                atmel_pwm_bl_set_gpio_on(pwmbl, 1);
-        }
-
-        return 0;
-}
-
-static int atmel_pwm_bl_get_intensity(struct backlight_device *bd)
-{
-        struct atmel_pwm_bl *pwmbl = bl_get_data(bd);
-        u32 cdty;
-        u32 intensity;
-
-        cdty = pwm_channel_readl(&pwmbl->pwmc, PWM_CDTY);
-        if (pwmbl->pdata->pwm_active_low)
-                intensity = cdty - pwmbl->pdata->pwm_duty_min;
-        else
-                intensity = pwmbl->pdata->pwm_duty_max - cdty;
-
-        return intensity & 0xffff;
-}
-
-static int atmel_pwm_bl_init_pwm(struct atmel_pwm_bl *pwmbl)
-{
-        unsigned long pwm_rate = pwmbl->pwmc.mck;
-        unsigned long prescale = DIV_ROUND_UP(pwm_rate,
-                        (pwmbl->pdata->pwm_frequency *
-                         pwmbl->pdata->pwm_compare_max)) - 1;
-
-        /*
-         * Prescale must be power of two and maximum 0xf in size because of
-         * hardware limit. PWM speed will be:
-         *      PWM module clock speed / (2 ^ prescale).
-         */
-        prescale = fls(prescale);
-        if (prescale > 0xf)
-                prescale = 0xf;
-
-        pwm_channel_writel(&pwmbl->pwmc, PWM_CMR, prescale);
-        pwm_channel_writel(&pwmbl->pwmc, PWM_CDTY,
-                        pwmbl->pdata->pwm_duty_min +
-                        pwmbl->bldev->props.brightness);
-        pwm_channel_writel(&pwmbl->pwmc, PWM_CPRD,
-                        pwmbl->pdata->pwm_compare_max);
-
-        dev_info(&pwmbl->pdev->dev, "Atmel PWM backlight driver (%lu Hz)\n",
-                pwmbl->pwmc.mck / pwmbl->pdata->pwm_compare_max /
-                (1 << prescale));
-
-        return pwm_channel_enable(&pwmbl->pwmc);
-}
-
-static const struct backlight_ops atmel_pwm_bl_ops = {
-        .get_brightness = atmel_pwm_bl_get_intensity,
-        .update_status  = atmel_pwm_bl_set_intensity,
-};
-
-static int atmel_pwm_bl_probe(struct platform_device *pdev)
-{
-        struct backlight_properties props;
-        const struct atmel_pwm_bl_platform_data *pdata;
-        struct backlight_device *bldev;
-        struct atmel_pwm_bl *pwmbl;
-        unsigned long flags;
-        int retval;
-
-        pdata = dev_get_platdata(&pdev->dev);
-        if (!pdata)
-                return -ENODEV;
-
-        if (pdata->pwm_compare_max < pdata->pwm_duty_max ||
-                        pdata->pwm_duty_min > pdata->pwm_duty_max ||
-                        pdata->pwm_frequency == 0)
-                return -EINVAL;
-
-        pwmbl = devm_kzalloc(&pdev->dev, sizeof(struct atmel_pwm_bl),
-                                GFP_KERNEL);
-        if (!pwmbl)
-                return -ENOMEM;
-
-        pwmbl->pdev = pdev;
-        pwmbl->pdata = pdata;
-        pwmbl->gpio_on = pdata->gpio_on;
-
-        retval = pwm_channel_alloc(pdata->pwm_channel, &pwmbl->pwmc);
-        if (retval)
-                return retval;
-
-        if (gpio_is_valid(pwmbl->gpio_on)) {
-                /* Turn display off by default. */
-                if (pdata->on_active_low)
-                        flags = GPIOF_OUT_INIT_HIGH;
-                else
-                        flags = GPIOF_OUT_INIT_LOW;
-
-                retval = devm_gpio_request_one(&pdev->dev, pwmbl->gpio_on,
-                                                flags, "gpio_atmel_pwm_bl");
-                if (retval)
-                        goto err_free_pwm;
-        }
-
-        memset(&props, 0, sizeof(struct backlight_properties));
-        props.type = BACKLIGHT_RAW;
-        props.max_brightness = pdata->pwm_duty_max - pdata->pwm_duty_min;
-        bldev = devm_backlight_device_register(&pdev->dev, "atmel-pwm-bl",
-                                        &pdev->dev, pwmbl, &atmel_pwm_bl_ops,
-                                        &props);
-        if (IS_ERR(bldev)) {
-                retval = PTR_ERR(bldev);
-                goto err_free_pwm;
-        }
-
-        pwmbl->bldev = bldev;
-
-        platform_set_drvdata(pdev, pwmbl);
-
-        /* Power up the backlight by default at middle intesity. */
-        bldev->props.power = FB_BLANK_UNBLANK;
-        bldev->props.brightness = bldev->props.max_brightness / 2;
-
-        retval = atmel_pwm_bl_init_pwm(pwmbl);
-        if (retval)
-                goto err_free_pwm;
-
-        atmel_pwm_bl_set_intensity(bldev);
-
-        return 0;
-
-err_free_pwm:
-        pwm_channel_free(&pwmbl->pwmc);
-
-        return retval;
-}
-
-static int atmel_pwm_bl_remove(struct platform_device *pdev)
-{
-        struct atmel_pwm_bl *pwmbl = platform_get_drvdata(pdev);
-
-        atmel_pwm_bl_set_gpio_on(pwmbl, 0);
-        pwm_channel_disable(&pwmbl->pwmc);
-        pwm_channel_free(&pwmbl->pwmc);
-
-        return 0;
-}
-
-static struct platform_driver atmel_pwm_bl_driver = {
-        .driver = {
-                .name = "atmel-pwm-bl",
-        },
-        /* REVISIT add suspend() and resume() */
-        .probe = atmel_pwm_bl_probe,
-        .remove = atmel_pwm_bl_remove,
-};
-
-module_platform_driver(atmel_pwm_bl_driver);
-
-MODULE_AUTHOR("Hans-Christian egtvedt <hans-christian.egtvedt@atmel.com>");
-MODULE_DESCRIPTION("Atmel PWM backlight driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:atmel-pwm-bl");
diff --git a/include/linux/atmel-pwm-bl.h b/include/linux/atmel-pwm-bl.h
deleted file mode 100644
index 0153a47806c2..000000000000
--- a/include/linux/atmel-pwm-bl.h
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
- * Copyright (C) 2007 Atmel Corporation
- *
- * Driver for the AT32AP700X PS/2 controller (PSIF).
- *
- * 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.
- */
-
-#ifndef __INCLUDE_ATMEL_PWM_BL_H
-#define __INCLUDE_ATMEL_PWM_BL_H
-
-/**
- * struct atmel_pwm_bl_platform_data
- * @pwm_channel: which PWM channel in the PWM module to use.
- * @pwm_frequency: PWM frequency to generate, the driver will try to be as
- *      close as the prescaler allows.
- * @pwm_compare_max: value to use in the PWM channel compare register.
- * @pwm_duty_max: maximum duty cycle value, must be less than or equal to
- *      pwm_compare_max.
- * @pwm_duty_min: minimum duty cycle value, must be less than pwm_duty_max.
- * @pwm_active_low: set to one if the low part of the PWM signal increases the
- *      brightness of the backlight.
- * @gpio_on: GPIO line to control the backlight on/off, set to -1 if not used.
- * @on_active_low: set to one if the on/off signal is on when GPIO is low.
- *
- * This struct must be added to the platform device in the board code. It is
- * used by the atmel-pwm-bl driver to setup the GPIO to control on/off and the
- * PWM device.
- */
-struct atmel_pwm_bl_platform_data {
-        unsigned int pwm_channel;
-        unsigned int pwm_frequency;
-        unsigned int pwm_compare_max;
-        unsigned int pwm_duty_max;
-        unsigned int pwm_duty_min;
-        unsigned int pwm_active_low;
-        int gpio_on;
-        unsigned int on_active_low;
-};
-
-#endif /* __INCLUDE_ATMEL_PWM_BL_H */