From: Tomasz Figa Date: Sat, 6 Apr 2013 00:54:30 +0000 (+0200) Subject: pwm: Remove superseded pwm-samsung-legacy driver X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=6059235c510ced2be3e86c7a09dc1d27da993023;p=linux-beck.git pwm: Remove superseded pwm-samsung-legacy driver This patch removes the now unused pwm-samsung-legacy driver, which was replaced by new pwm-samsung driver. Signed-off-by: Tomasz Figa Reviewed-by: Sylwester Nawrocki Tested-by: Heiko Stuebner Tested-by: Mark Brown Tested-by: Sylwester Nawrocki Acked-by: Arnd Bergmann Acked-by: Thierry Reding --- diff --git a/drivers/pwm/Makefile b/drivers/pwm/Makefile index 86a57713b721..77a8c185c5b2 100644 --- a/drivers/pwm/Makefile +++ b/drivers/pwm/Makefile @@ -11,7 +11,6 @@ obj-$(CONFIG_PWM_PCA9685) += pwm-pca9685.o obj-$(CONFIG_PWM_PUV3) += pwm-puv3.o obj-$(CONFIG_PWM_PXA) += pwm-pxa.o obj-$(CONFIG_PWM_RENESAS_TPU) += pwm-renesas-tpu.o -obj-$(CONFIG_PWM_SAMSUNG) += pwm-samsung-legacy.o obj-$(CONFIG_PWM_SAMSUNG) += pwm-samsung.o obj-$(CONFIG_PWM_SPEAR) += pwm-spear.o obj-$(CONFIG_PWM_TEGRA) += pwm-tegra.o diff --git a/drivers/pwm/pwm-samsung-legacy.c b/drivers/pwm/pwm-samsung-legacy.c deleted file mode 100644 index a0ece50d70bb..000000000000 --- a/drivers/pwm/pwm-samsung-legacy.c +++ /dev/null @@ -1,353 +0,0 @@ -/* drivers/pwm/pwm-samsung.c - * - * Copyright (c) 2007 Ben Dooks - * Copyright (c) 2008 Simtec Electronics - * Ben Dooks , - * - * S3C series PWM device core - * - * 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. -*/ - -#define pr_fmt(fmt) "pwm-samsung: " fmt - -#include -#include -#include -#include -#include -#include -#include -#include - -#include - -#include - -struct s3c_chip { - struct platform_device *pdev; - - struct clk *clk_div; - struct clk *clk; - const char *label; - - unsigned int period_ns; - unsigned int duty_ns; - - unsigned char tcon_base; - unsigned char pwm_id; - struct pwm_chip chip; -}; - -#define to_s3c_chip(chip) container_of(chip, struct s3c_chip, chip) - -#define pwm_dbg(_pwm, msg...) dev_dbg(&(_pwm)->pdev->dev, msg) - -static struct clk *clk_scaler[2]; - -static inline int pwm_is_tdiv(struct s3c_chip *chip) -{ - return clk_get_parent(chip->clk) == chip->clk_div; -} - -#define pwm_tcon_start(pwm) (1 << (pwm->tcon_base + 0)) -#define pwm_tcon_invert(pwm) (1 << (pwm->tcon_base + 2)) -#define pwm_tcon_autoreload(pwm) (1 << (pwm->tcon_base + 3)) -#define pwm_tcon_manulupdate(pwm) (1 << (pwm->tcon_base + 1)) - -static int s3c_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm) -{ - struct s3c_chip *s3c = to_s3c_chip(chip); - unsigned long flags; - unsigned long tcon; - - local_irq_save(flags); - - tcon = __raw_readl(S3C2410_TCON); - tcon |= pwm_tcon_start(s3c); - __raw_writel(tcon, S3C2410_TCON); - - local_irq_restore(flags); - - return 0; -} - -static void s3c_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) -{ - struct s3c_chip *s3c = to_s3c_chip(chip); - unsigned long flags; - unsigned long tcon; - - local_irq_save(flags); - - tcon = __raw_readl(S3C2410_TCON); - tcon &= ~pwm_tcon_start(s3c); - __raw_writel(tcon, S3C2410_TCON); - - local_irq_restore(flags); -} - -static unsigned long pwm_calc_tin(struct s3c_chip *s3c, unsigned long freq) -{ - unsigned long tin_parent_rate; - unsigned int div; - - tin_parent_rate = clk_get_rate(clk_get_parent(s3c->clk_div)); - pwm_dbg(s3c, "tin parent at %lu\n", tin_parent_rate); - - for (div = 2; div <= 16; div *= 2) { - if ((tin_parent_rate / (div << 16)) < freq) - return tin_parent_rate / div; - } - - return tin_parent_rate / 16; -} - -#define NS_IN_HZ (1000000000UL) - -static int s3c_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, - int duty_ns, int period_ns) -{ - struct s3c_chip *s3c = to_s3c_chip(chip); - unsigned long tin_rate; - unsigned long tin_ns; - unsigned long period; - unsigned long flags; - unsigned long tcon; - unsigned long tcnt; - long tcmp; - - /* We currently avoid using 64bit arithmetic by using the - * fact that anything faster than 1Hz is easily representable - * by 32bits. */ - - if (period_ns > NS_IN_HZ || duty_ns > NS_IN_HZ) - return -ERANGE; - - if (period_ns == s3c->period_ns && - duty_ns == s3c->duty_ns) - return 0; - - /* The TCMP and TCNT can be read without a lock, they're not - * shared between the timers. */ - - tcmp = __raw_readl(S3C2410_TCMPB(s3c->pwm_id)); - tcnt = __raw_readl(S3C2410_TCNTB(s3c->pwm_id)); - - period = NS_IN_HZ / period_ns; - - pwm_dbg(s3c, "duty_ns=%d, period_ns=%d (%lu)\n", - duty_ns, period_ns, period); - - /* Check to see if we are changing the clock rate of the PWM */ - - if (s3c->period_ns != period_ns) { - if (pwm_is_tdiv(s3c)) { - tin_rate = pwm_calc_tin(s3c, period); - clk_set_rate(s3c->clk_div, tin_rate); - } else - tin_rate = clk_get_rate(s3c->clk); - - s3c->period_ns = period_ns; - - pwm_dbg(s3c, "tin_rate=%lu\n", tin_rate); - - tin_ns = NS_IN_HZ / tin_rate; - tcnt = period_ns / tin_ns; - } else - tin_ns = NS_IN_HZ / clk_get_rate(s3c->clk); - - /* Note, counters count down */ - - tcmp = duty_ns / tin_ns; - tcmp = tcnt - tcmp; - /* the pwm hw only checks the compare register after a decrement, - so the pin never toggles if tcmp = tcnt */ - if (tcmp == tcnt) - tcmp--; - - pwm_dbg(s3c, "tin_ns=%lu, tcmp=%ld/%lu\n", tin_ns, tcmp, tcnt); - - if (tcmp < 0) - tcmp = 0; - - /* Update the PWM register block. */ - - local_irq_save(flags); - - __raw_writel(tcmp, S3C2410_TCMPB(s3c->pwm_id)); - __raw_writel(tcnt, S3C2410_TCNTB(s3c->pwm_id)); - - tcon = __raw_readl(S3C2410_TCON); - tcon |= pwm_tcon_manulupdate(s3c); - tcon |= pwm_tcon_autoreload(s3c); - __raw_writel(tcon, S3C2410_TCON); - - tcon &= ~pwm_tcon_manulupdate(s3c); - __raw_writel(tcon, S3C2410_TCON); - - local_irq_restore(flags); - - return 0; -} - -static struct pwm_ops s3c_pwm_ops = { - .enable = s3c_pwm_enable, - .disable = s3c_pwm_disable, - .config = s3c_pwm_config, - .owner = THIS_MODULE, -}; - -static int s3c_pwm_probe(struct platform_device *pdev) -{ - struct device *dev = &pdev->dev; - struct s3c_chip *s3c; - unsigned long flags; - unsigned long tcon; - unsigned int id = pdev->id; - int ret; - - if (id == 4) { - dev_err(dev, "TIMER4 is currently not supported\n"); - return -ENXIO; - } - - s3c = devm_kzalloc(&pdev->dev, sizeof(*s3c), GFP_KERNEL); - if (s3c == NULL) { - dev_err(dev, "failed to allocate pwm_device\n"); - return -ENOMEM; - } - - /* calculate base of control bits in TCON */ - s3c->tcon_base = id == 0 ? 0 : (id * 4) + 4; - s3c->pwm_id = id; - s3c->chip.dev = &pdev->dev; - s3c->chip.ops = &s3c_pwm_ops; - s3c->chip.base = -1; - s3c->chip.npwm = 1; - - s3c->clk = devm_clk_get(dev, "pwm-tin"); - if (IS_ERR(s3c->clk)) { - dev_err(dev, "failed to get pwm tin clk\n"); - return PTR_ERR(s3c->clk); - } - - s3c->clk_div = devm_clk_get(dev, "pwm-tdiv"); - if (IS_ERR(s3c->clk_div)) { - dev_err(dev, "failed to get pwm tdiv clk\n"); - return PTR_ERR(s3c->clk_div); - } - - clk_enable(s3c->clk); - clk_enable(s3c->clk_div); - - local_irq_save(flags); - - tcon = __raw_readl(S3C2410_TCON); - tcon |= pwm_tcon_invert(s3c); - __raw_writel(tcon, S3C2410_TCON); - - local_irq_restore(flags); - - ret = pwmchip_add(&s3c->chip); - if (ret < 0) { - dev_err(dev, "failed to register pwm\n"); - goto err_clk_tdiv; - } - - pwm_dbg(s3c, "config bits %02x\n", - (__raw_readl(S3C2410_TCON) >> s3c->tcon_base) & 0x0f); - - dev_info(dev, "tin at %lu, tdiv at %lu, tin=%sclk, base %d\n", - clk_get_rate(s3c->clk), - clk_get_rate(s3c->clk_div), - pwm_is_tdiv(s3c) ? "div" : "ext", s3c->tcon_base); - - platform_set_drvdata(pdev, s3c); - return 0; - - err_clk_tdiv: - clk_disable(s3c->clk_div); - clk_disable(s3c->clk); - return ret; -} - -static int s3c_pwm_remove(struct platform_device *pdev) -{ - struct s3c_chip *s3c = platform_get_drvdata(pdev); - int err; - - err = pwmchip_remove(&s3c->chip); - if (err < 0) - return err; - - clk_disable(s3c->clk_div); - clk_disable(s3c->clk); - - return 0; -} - -#ifdef CONFIG_PM_SLEEP -static int s3c_pwm_suspend(struct device *dev) -{ - struct s3c_chip *s3c = dev_get_drvdata(dev); - - /* No one preserve these values during suspend so reset them - * Otherwise driver leaves PWM unconfigured if same values - * passed to pwm_config - */ - s3c->period_ns = 0; - s3c->duty_ns = 0; - - return 0; -} - -static int s3c_pwm_resume(struct device *dev) -{ - struct s3c_chip *s3c = dev_get_drvdata(dev); - unsigned long tcon; - - /* Restore invertion */ - tcon = __raw_readl(S3C2410_TCON); - tcon |= pwm_tcon_invert(s3c); - __raw_writel(tcon, S3C2410_TCON); - - return 0; -} -#endif - -static SIMPLE_DEV_PM_OPS(s3c_pwm_pm_ops, s3c_pwm_suspend, - s3c_pwm_resume); - -static struct platform_driver s3c_pwm_driver = { - .driver = { - .name = "s3c24xx-pwm", - .owner = THIS_MODULE, - .pm = &s3c_pwm_pm_ops, - }, - .probe = s3c_pwm_probe, - .remove = s3c_pwm_remove, -}; - -static int __init pwm_init(void) -{ - int ret; - - clk_scaler[0] = clk_get(NULL, "pwm-scaler0"); - clk_scaler[1] = clk_get(NULL, "pwm-scaler1"); - - if (IS_ERR(clk_scaler[0]) || IS_ERR(clk_scaler[1])) { - pr_err("failed to get scaler clocks\n"); - return -EINVAL; - } - - ret = platform_driver_register(&s3c_pwm_driver); - if (ret) - pr_err("failed to add pwm driver\n"); - - return ret; -} - -arch_initcall(pwm_init);