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Commit 6179a58e authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Thierry Reding
Browse files

pwm: Remove pwm-twl6030 driver 



This driver only supported the Charging indicator LED.
New set of drivers going to provide support for both PWMs and LEDs for twl4030
and twl6030 series of PMICs.

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: default avatarThierry Reding <thierry.reding@avionic-design.de>
parent aa765647

drivers/pwm/Kconfig

+0 −9
Original line number Diff line number Diff line
@@ -164,15 +164,6 @@ config PWM_TIPWMSS 
	  PWM submodules require PWM config space access from submodule

	  drivers and require common parent driver support.



config PWM_TWL6030

	tristate "TWL6030 PWM support"

	depends on TWL4030_CORE

	help

	  Generic PWM framework driver for TWL6030.



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

	  will be called pwm-twl6030.



config PWM_TWL

	tristate "TWL4030/6030 PWM support"

	depends on TWL4030_CORE

drivers/pwm/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -13,7 +13,6 @@ obj-$(CONFIG_PWM_TEGRA) += pwm-tegra.o 
obj-$(CONFIG_PWM_TIECAP)	+= pwm-tiecap.o

obj-$(CONFIG_PWM_TIEHRPWM)	+= pwm-tiehrpwm.o

obj-$(CONFIG_PWM_TIPWMSS)	+= pwm-tipwmss.o

obj-$(CONFIG_PWM_TWL6030)	+= pwm-twl6030.o

obj-$(CONFIG_PWM_TWL)		+= pwm-twl.o

obj-$(CONFIG_PWM_TWL_LED)	+= pwm-twl-led.o

obj-$(CONFIG_PWM_VT8500)	+= pwm-vt8500.o

drivers/pwm/pwm-twl6030.c

deleted100644 → 0
+0 −184
Original line number Diff line number Diff line 
/*

 * twl6030_pwm.c

 * Driver for PHOENIX (TWL6030) Pulse Width Modulator

 *

 * Copyright (C) 2010 Texas Instruments

 * Author: Hemanth V <hemanthv@ti.com>

 *

 * 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.

 *

 * This program is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

 * more details.

 *

 * You should have received a copy of the GNU General Public License along with

 * this program.  If not, see <http://www.gnu.org/licenses/>.

 */



#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/pwm.h>

#include <linux/i2c/twl.h>

#include <linux/slab.h>



#define LED_PWM_CTRL1	0xF4

#define LED_PWM_CTRL2	0xF5



/* Max value for CTRL1 register */

#define PWM_CTRL1_MAX	255



/* Pull down disable */

#define PWM_CTRL2_DIS_PD	(1 << 6)



/* Current control 2.5 milli Amps */

#define PWM_CTRL2_CURR_02	(2 << 4)



/* LED supply source */

#define PWM_CTRL2_SRC_VAC	(1 << 2)



/* LED modes */

#define PWM_CTRL2_MODE_HW	(0 << 0)

#define PWM_CTRL2_MODE_SW	(1 << 0)

#define PWM_CTRL2_MODE_DIS	(2 << 0)



#define PWM_CTRL2_MODE_MASK	0x3



struct twl6030_pwm_chip {

	struct pwm_chip chip;

};



static int twl6030_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)

{

	int ret;

	u8 val;



	/* Configure PWM */

	val = PWM_CTRL2_DIS_PD | PWM_CTRL2_CURR_02 | PWM_CTRL2_SRC_VAC |

	      PWM_CTRL2_MODE_HW;



	ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, val, LED_PWM_CTRL2);

	if (ret < 0) {

		dev_err(chip->dev, "%s: Failed to configure PWM, Error %d\n",

			pwm->label, ret);

		return ret;

	}



	return 0;

}



static int twl6030_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,

			      int duty_ns, int period_ns)

{

	u8 duty_cycle = (duty_ns * PWM_CTRL1_MAX) / period_ns;

	int ret;



	ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, duty_cycle, LED_PWM_CTRL1);

	if (ret < 0) {

		pr_err("%s: Failed to configure PWM, Error %d\n",

			pwm->label, ret);

		return ret;

	}



	return 0;

}



static int twl6030_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)

{

	int ret;

	u8 val;



	ret = twl_i2c_read_u8(TWL6030_MODULE_ID1, &val, LED_PWM_CTRL2);

	if (ret < 0) {

		dev_err(chip->dev, "%s: Failed to enable PWM, Error %d\n",

			pwm->label, ret);

		return ret;

	}



	/* Change mode to software control */

	val &= ~PWM_CTRL2_MODE_MASK;

	val |= PWM_CTRL2_MODE_SW;



	ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, val, LED_PWM_CTRL2);

	if (ret < 0) {

		dev_err(chip->dev, "%s: Failed to enable PWM, Error %d\n",

			pwm->label, ret);

		return ret;

	}



	twl_i2c_read_u8(TWL6030_MODULE_ID1, &val, LED_PWM_CTRL2);

	return 0;

}



static void twl6030_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)

{

	int ret;

	u8 val;



	ret = twl_i2c_read_u8(TWL6030_MODULE_ID1, &val, LED_PWM_CTRL2);

	if (ret < 0) {

		dev_err(chip->dev, "%s: Failed to disable PWM, Error %d\n",

			pwm->label, ret);

		return;

	}



	val &= ~PWM_CTRL2_MODE_MASK;

	val |= PWM_CTRL2_MODE_HW;



	ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, val, LED_PWM_CTRL2);

	if (ret < 0) {

		dev_err(chip->dev, "%s: Failed to disable PWM, Error %d\n",

			pwm->label, ret);

	}

}



static const struct pwm_ops twl6030_pwm_ops = {

	.request = twl6030_pwm_request,

	.config = twl6030_pwm_config,

	.enable = twl6030_pwm_enable,

	.disable = twl6030_pwm_disable,

};



static int twl6030_pwm_probe(struct platform_device *pdev)

{

	struct twl6030_pwm_chip *twl6030;

	int ret;



	twl6030 = devm_kzalloc(&pdev->dev, sizeof(*twl6030), GFP_KERNEL);

	if (!twl6030)

		return -ENOMEM;



	twl6030->chip.dev = &pdev->dev;

	twl6030->chip.ops = &twl6030_pwm_ops;

	twl6030->chip.base = -1;

	twl6030->chip.npwm = 1;



	ret = pwmchip_add(&twl6030->chip);

	if (ret < 0)

		return ret;



	platform_set_drvdata(pdev, twl6030);



	return 0;

}



static int twl6030_pwm_remove(struct platform_device *pdev)

{

	struct twl6030_pwm_chip *twl6030 = platform_get_drvdata(pdev);



	return pwmchip_remove(&twl6030->chip);

}



static struct platform_driver twl6030_pwm_driver = {

	.driver = {

		.name = "twl6030-pwm",

	},

	.probe = twl6030_pwm_probe,

	.remove = __devexit_p(twl6030_pwm_remove),

};

module_platform_driver(twl6030_pwm_driver);



MODULE_ALIAS("platform:twl6030-pwm");

MODULE_LICENSE("GPL");