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path: root/drivers/pwm/pwm-twl6030.c
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Diffstat (limited to 'drivers/pwm/pwm-twl6030.c')
-rw-r--r--drivers/pwm/pwm-twl6030.c184
1 files changed, 0 insertions, 184 deletions
diff --git a/drivers/pwm/pwm-twl6030.c b/drivers/pwm/pwm-twl6030.c
deleted file mode 100644
index 378a7e286366..000000000000
--- a/drivers/pwm/pwm-twl6030.c
+++ /dev/null
@@ -1,184 +0,0 @@
-/*
- * 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 = twl6030_pwm_remove,
-};
-module_platform_driver(twl6030_pwm_driver);
-
-MODULE_ALIAS("platform:twl6030-pwm");
-MODULE_LICENSE("GPL");