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Commit 4dab216d authored by Arnd Bergmann's avatar Arnd Bergmann
Browse files

pwm: remove pwm-bfin driver 



The blackfin architecture is getting removed, so this driver is now
obsolete as well.

Acked-by: default avatarThierry Reding <thierry.reding@gmail.com>
Acked-by: default avatarAaron Wu <aaron.wu@analog.com>
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
parent e58af24c

drivers/pwm/Kconfig

+0 −9
Original line number Diff line number Diff line
@@ -113,15 +113,6 @@ config PWM_BERLIN 
	  To compile this driver as a module, choose M here: the module

	  will be called pwm-berlin.



config PWM_BFIN

	tristate "Blackfin PWM support"

	depends on BFIN_GPTIMERS

	help

	  Generic PWM framework driver for Blackfin.



	  To compile this driver as a module, choose M here: the module

	  will be called pwm-bfin.



config PWM_BRCMSTB

	tristate "Broadcom STB PWM support"

	depends on ARCH_BRCMSTB || BMIPS_GENERIC

drivers/pwm/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -9,7 +9,6 @@ obj-$(CONFIG_PWM_BCM_IPROC) += pwm-bcm-iproc.o 
obj-$(CONFIG_PWM_BCM_KONA)	+= pwm-bcm-kona.o

obj-$(CONFIG_PWM_BCM2835)	+= pwm-bcm2835.o

obj-$(CONFIG_PWM_BERLIN)	+= pwm-berlin.o

obj-$(CONFIG_PWM_BFIN)		+= pwm-bfin.o

obj-$(CONFIG_PWM_BRCMSTB)	+= pwm-brcmstb.o

obj-$(CONFIG_PWM_CLPS711X)	+= pwm-clps711x.o

obj-$(CONFIG_PWM_CRC)		+= pwm-crc.o

drivers/pwm/pwm-bfin.c

deleted100644 → 0
+0 −157
Original line number Diff line number Diff line 
/*

 * Blackfin Pulse Width Modulation (PWM) core

 *

 * Copyright (c) 2011 Analog Devices Inc.

 *

 * Licensed under the GPL-2 or later.

 */



#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/pwm.h>

#include <linux/slab.h>



#include <asm/gptimers.h>

#include <asm/portmux.h>



struct bfin_pwm_chip {

	struct pwm_chip chip;

};



struct bfin_pwm {

	unsigned short pin;

};



static const unsigned short pwm_to_gptimer_per[] = {

	P_TMR0, P_TMR1, P_TMR2, P_TMR3, P_TMR4, P_TMR5,

	P_TMR6, P_TMR7, P_TMR8, P_TMR9, P_TMR10, P_TMR11,

};



static int bfin_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)

{

	struct bfin_pwm *priv;

	int ret;



	if (pwm->hwpwm >= ARRAY_SIZE(pwm_to_gptimer_per))

		return -EINVAL;



	priv = kzalloc(sizeof(*priv), GFP_KERNEL);

	if (!priv)

		return -ENOMEM;



	priv->pin = pwm_to_gptimer_per[pwm->hwpwm];



	ret = peripheral_request(priv->pin, NULL);

	if (ret) {

		kfree(priv);

		return ret;

	}



	pwm_set_chip_data(pwm, priv);



	return 0;

}



static void bfin_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm)

{

	struct bfin_pwm *priv = pwm_get_chip_data(pwm);



	if (priv) {

		peripheral_free(priv->pin);

		kfree(priv);

	}

}



static int bfin_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,

		int duty_ns, int period_ns)

{

	struct bfin_pwm *priv = pwm_get_chip_data(pwm);

	unsigned long period, duty;

	unsigned long long val;



	val = (unsigned long long)get_sclk() * period_ns;

	do_div(val, NSEC_PER_SEC);

	period = val;



	val = (unsigned long long)period * duty_ns;

	do_div(val, period_ns);

	duty = period - val;



	if (duty >= period)

		duty = period - 1;



	set_gptimer_config(priv->pin, TIMER_MODE_PWM | TIMER_PERIOD_CNT);

	set_gptimer_pwidth(priv->pin, duty);

	set_gptimer_period(priv->pin, period);



	return 0;

}



static int bfin_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)

{

	struct bfin_pwm *priv = pwm_get_chip_data(pwm);



	enable_gptimer(priv->pin);



	return 0;

}



static void bfin_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)

{

	struct bfin_pwm *priv = pwm_get_chip_data(pwm);



	disable_gptimer(priv->pin);

}



static const struct pwm_ops bfin_pwm_ops = {

	.request = bfin_pwm_request,

	.free = bfin_pwm_free,

	.config = bfin_pwm_config,

	.enable = bfin_pwm_enable,

	.disable = bfin_pwm_disable,

	.owner = THIS_MODULE,

};



static int bfin_pwm_probe(struct platform_device *pdev)

{

	struct bfin_pwm_chip *pwm;

	int ret;



	pwm = devm_kzalloc(&pdev->dev, sizeof(*pwm), GFP_KERNEL);

	if (!pwm)

		return -ENOMEM;



	platform_set_drvdata(pdev, pwm);



	pwm->chip.dev = &pdev->dev;

	pwm->chip.ops = &bfin_pwm_ops;

	pwm->chip.base = -1;

	pwm->chip.npwm = 12;



	ret = pwmchip_add(&pwm->chip);

	if (ret < 0) {

		dev_err(&pdev->dev, "pwmchip_add() failed: %d\n", ret);

		return ret;

	}



	return 0;

}



static int bfin_pwm_remove(struct platform_device *pdev)

{

	struct bfin_pwm_chip *pwm = platform_get_drvdata(pdev);



	return pwmchip_remove(&pwm->chip);

}



static struct platform_driver bfin_pwm_driver = {

	.driver = {

		.name = "bfin-pwm",

	},

	.probe = bfin_pwm_probe,

	.remove = bfin_pwm_remove,

};



module_platform_driver(bfin_pwm_driver);



MODULE_LICENSE("GPL");