pwm: Move PUV3 PWM driver to PWM framework

This commit moves the driver to drivers/pwm and converts it to the new
PWM framework.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Tested-by: Qin Rui <qinrui@mprc.pku.edu.cn>
Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn>

2 files changed, 0 insertions, 220 deletions

diff --git a/arch/unicore32/kernel/Makefile b/arch/unicore32/kernel/Makefile
index 324010156958..fa497e0efe5a 100644
--- a/arch/unicore32/kernel/Makefile
+++ b/arch/unicore32/kernel/Makefile
@@ -16,7 +16,6 @@ obj-$(CONFIG_UNICORE_FPU_F64)	+= fpu-ucf64.o
 obj-$(CONFIG_ARCH_PUV3)         += clock.o irq.o time.o
 
 obj-$(CONFIG_PUV3_GPIO)         += gpio.o
-obj-$(CONFIG_PUV3_PWM)          += pwm.o
 obj-$(CONFIG_PUV3_PM)           += pm.o sleep.o
 obj-$(CONFIG_HIBERNATION)       += hibernate.o hibernate_asm.o
 
diff --git a/arch/unicore32/kernel/pwm.c b/arch/unicore32/kernel/pwm.c
deleted file mode 100644
index 724e8603120b..000000000000
--- a/arch/unicore32/kernel/pwm.c
+++ /dev/null
@@ -1,219 +0,0 @@
-/*
- * linux/arch/unicore32/kernel/pwm.c
- *
- * Code specific to PKUnity SoC and UniCore ISA
- *
- *      Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
- *      Copyright (C) 2001-2010 Guan Xuetao
- *
- * 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/platform_device.h>
-#include <linux/slab.h>
-#include <linux/err.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/pwm.h>
-
-#include <asm/div64.h>
-#include <mach/hardware.h>
-
-struct pwm_device {
-        struct list_head        node;
-        struct platform_device *pdev;
-
-        void __iomem    *base;
-
-        const char      *label;
-        struct clk      *clk;
-        int             clk_enabled;
-
-        unsigned int    use_count;
-        unsigned int    pwm_id;
-};
-
-/*
- * period_ns = 10^9 * (PRESCALE + 1) * (PV + 1) / PWM_CLK_RATE
- * duty_ns   = 10^9 * (PRESCALE + 1) * DC / PWM_CLK_RATE
- */
-int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)
-{
-        unsigned long long c;
-        unsigned long period_cycles, prescale, pv, dc;
-
-        if (pwm == NULL || period_ns == 0 || duty_ns > period_ns)
-                return -EINVAL;
-
-        c = clk_get_rate(pwm->clk);
-        c = c * period_ns;
-        do_div(c, 1000000000);
-        period_cycles = c;
-
-        if (period_cycles < 1)
-                period_cycles = 1;
-        prescale = (period_cycles - 1) / 1024;
-        pv = period_cycles / (prescale + 1) - 1;
-
-        if (prescale > 63)
-                return -EINVAL;
-
-        if (duty_ns == period_ns)
-                dc = OST_PWMDCCR_FDCYCLE;
-        else
-                dc = (pv + 1) * duty_ns / period_ns;
-
-        /* NOTE: the clock to PWM has to be enabled first
-         * before writing to the registers
-         */
-        clk_enable(pwm->clk);
-
-        writel(prescale, pwm->base + OST_PWM_PWCR);
-        writel(pv - dc, pwm->base + OST_PWM_DCCR);
-        writel(pv, pwm->base + OST_PWM_PCR);
-
-        clk_disable(pwm->clk);
-
-        return 0;
-}
-EXPORT_SYMBOL(pwm_config);
-
-int pwm_enable(struct pwm_device *pwm)
-{
-        int rc = 0;
-
-        if (!pwm->clk_enabled) {
-                rc = clk_enable(pwm->clk);
-                if (!rc)
-                        pwm->clk_enabled = 1;
-        }
-        return rc;
-}
-EXPORT_SYMBOL(pwm_enable);
-
-void pwm_disable(struct pwm_device *pwm)
-{
-        if (pwm->clk_enabled) {
-                clk_disable(pwm->clk);
-                pwm->clk_enabled = 0;
-        }
-}
-EXPORT_SYMBOL(pwm_disable);
-
-static DEFINE_MUTEX(pwm_lock);
-static LIST_HEAD(pwm_list);
-
-struct pwm_device *pwm_request(int pwm_id, const char *label)
-{
-        struct pwm_device *pwm;
-        int found = 0;
-
-        mutex_lock(&pwm_lock);
-
-        list_for_each_entry(pwm, &pwm_list, node) {
-                if (pwm->pwm_id == pwm_id) {
-                        found = 1;
-                        break;
-                }
-        }
-
-        if (found) {
-                if (pwm->use_count == 0) {
-                        pwm->use_count++;
-                        pwm->label = label;
-                } else
-                        pwm = ERR_PTR(-EBUSY);
-        } else
-                pwm = ERR_PTR(-ENOENT);
-
-        mutex_unlock(&pwm_lock);
-        return pwm;
-}
-EXPORT_SYMBOL(pwm_request);
-
-void pwm_free(struct pwm_device *pwm)
-{
-        mutex_lock(&pwm_lock);
-
-        if (pwm->use_count) {
-                pwm->use_count--;
-                pwm->label = NULL;
-        } else
-                pr_warning("PWM device already freed\n");
-
-        mutex_unlock(&pwm_lock);
-}
-EXPORT_SYMBOL(pwm_free);
-
-static inline void __add_pwm(struct pwm_device *pwm)
-{
-        mutex_lock(&pwm_lock);
-        list_add_tail(&pwm->node, &pwm_list);
-        mutex_unlock(&pwm_lock);
-}
-
-static int __devinit pwm_probe(struct platform_device *pdev)
-{
-        struct pwm_device *pwm;
-        struct resource *r;
-
-        pwm = devm_kzalloc(&pdev->dev, sizeof(struct pwm_device), GFP_KERNEL);
-        if (pwm == NULL) {
-                dev_err(&pdev->dev, "failed to allocate memory\n");
-                return -ENOMEM;
-        }
-
-        pwm->clk = devm_clk_get(&pdev->dev, "OST_CLK");
-        if (IS_ERR(pwm->clk))
-                return PTR_ERR(pwm->clk);
-
-        pwm->clk_enabled = 0;
-
-        pwm->use_count = 0;
-        pwm->pwm_id = pdev->id;
-        pwm->pdev = pdev;
-
-        r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        if (r == NULL) {
-                dev_err(&pdev->dev, "no memory resource defined\n");
-                return -ENODEV;
-        }
-
-        pwm->base = devm_request_and_ioremap(&pdev->dev, r);
-        if (pwm->base == NULL)
-                return -EADDRNOTAVAIL;
-
-        __add_pwm(pwm);
-        platform_set_drvdata(pdev, pwm);
-        return 0;
-}
-
-static int __devexit pwm_remove(struct platform_device *pdev)
-{
-        struct pwm_device *pwm;
-
-        pwm = platform_get_drvdata(pdev);
-        if (pwm == NULL)
-                return -ENODEV;
-
-        mutex_lock(&pwm_lock);
-        list_del(&pwm->node);
-        mutex_unlock(&pwm_lock);
-
-        return 0;
-}
-
-static struct platform_driver puv3_pwm_driver = {
-        .driver         = {
-                .name   = "PKUnity-v3-PWM",
-        },
-        .probe          = pwm_probe,
-        .remove         = __devexit_p(pwm_remove),
-};
-module_platform_driver(puv3_pwm_driver);
-
-MODULE_LICENSE("GPL v2");