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path: root/drivers/pwm/pwm-atmel-hlcdc.c
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Diffstat (limited to 'drivers/pwm/pwm-atmel-hlcdc.c')
-rw-r--r--drivers/pwm/pwm-atmel-hlcdc.c116
1 files changed, 49 insertions, 67 deletions
diff --git a/drivers/pwm/pwm-atmel-hlcdc.c b/drivers/pwm/pwm-atmel-hlcdc.c
index 54c6633d9b5d..387a0d1fa4f2 100644
--- a/drivers/pwm/pwm-atmel-hlcdc.c
+++ b/drivers/pwm/pwm-atmel-hlcdc.c
@@ -1,26 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2014 Free Electrons
* Copyright (C) 2014 Atmel
*
* Author: Boris BREZILLON <boris.brezillon@free-electrons.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/clk.h>
#include <linux/delay.h>
#include <linux/mfd/atmel-hlcdc.h>
#include <linux/module.h>
+#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pwm.h>
#include <linux/regmap.h>
@@ -38,7 +28,6 @@ struct atmel_hlcdc_pwm_errata {
};
struct atmel_hlcdc_pwm {
- struct pwm_chip chip;
struct atmel_hlcdc *hlcdc;
struct clk *cur_clk;
const struct atmel_hlcdc_pwm_errata *errata;
@@ -46,14 +35,14 @@ struct atmel_hlcdc_pwm {
static inline struct atmel_hlcdc_pwm *to_atmel_hlcdc_pwm(struct pwm_chip *chip)
{
- return container_of(chip, struct atmel_hlcdc_pwm, chip);
+ return pwmchip_get_drvdata(chip);
}
-static int atmel_hlcdc_pwm_apply(struct pwm_chip *c, struct pwm_device *pwm,
- struct pwm_state *state)
+static int atmel_hlcdc_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+ const struct pwm_state *state)
{
- struct atmel_hlcdc_pwm *chip = to_atmel_hlcdc_pwm(c);
- struct atmel_hlcdc *hlcdc = chip->hlcdc;
+ struct atmel_hlcdc_pwm *atmel = to_atmel_hlcdc_pwm(chip);
+ struct atmel_hlcdc *hlcdc = atmel->hlcdc;
unsigned int status;
int ret;
@@ -65,7 +54,7 @@ static int atmel_hlcdc_pwm_apply(struct pwm_chip *c, struct pwm_device *pwm,
u32 pwmcfg;
int pres;
- if (!chip->errata || !chip->errata->slow_clk_erratum) {
+ if (!atmel->errata || !atmel->errata->slow_clk_erratum) {
clk_freq = clk_get_rate(new_clk);
if (!clk_freq)
return -EINVAL;
@@ -75,7 +64,7 @@ static int atmel_hlcdc_pwm_apply(struct pwm_chip *c, struct pwm_device *pwm,
}
/* Errata: cannot use slow clk on some IP revisions */
- if ((chip->errata && chip->errata->slow_clk_erratum) ||
+ if ((atmel->errata && atmel->errata->slow_clk_erratum) ||
clk_period_ns > state->period) {
new_clk = hlcdc->sys_clk;
clk_freq = clk_get_rate(new_clk);
@@ -88,8 +77,8 @@ static int atmel_hlcdc_pwm_apply(struct pwm_chip *c, struct pwm_device *pwm,
for (pres = 0; pres <= ATMEL_HLCDC_PWMPS_MAX; pres++) {
/* Errata: cannot divide by 1 on some IP revisions */
- if (!pres && chip->errata &&
- chip->errata->div1_clk_erratum)
+ if (!pres && atmel->errata &&
+ atmel->errata->div1_clk_erratum)
continue;
if ((clk_period_ns << pres) >= state->period)
@@ -101,7 +90,7 @@ static int atmel_hlcdc_pwm_apply(struct pwm_chip *c, struct pwm_device *pwm,
pwmcfg = ATMEL_HLCDC_PWMPS(pres);
- if (new_clk != chip->cur_clk) {
+ if (new_clk != atmel->cur_clk) {
u32 gencfg = 0;
int ret;
@@ -109,8 +98,8 @@ static int atmel_hlcdc_pwm_apply(struct pwm_chip *c, struct pwm_device *pwm,
if (ret)
return ret;
- clk_disable_unprepare(chip->cur_clk);
- chip->cur_clk = new_clk;
+ clk_disable_unprepare(atmel->cur_clk);
+ atmel->cur_clk = new_clk;
if (new_clk == hlcdc->sys_clk)
gencfg = ATMEL_HLCDC_CLKPWMSEL;
@@ -171,8 +160,8 @@ static int atmel_hlcdc_pwm_apply(struct pwm_chip *c, struct pwm_device *pwm,
if (ret)
return ret;
- clk_disable_unprepare(chip->cur_clk);
- chip->cur_clk = NULL;
+ clk_disable_unprepare(atmel->cur_clk);
+ atmel->cur_clk = NULL;
}
return 0;
@@ -180,7 +169,6 @@ static int atmel_hlcdc_pwm_apply(struct pwm_chip *c, struct pwm_device *pwm,
static const struct pwm_ops atmel_hlcdc_pwm_ops = {
.apply = atmel_hlcdc_pwm_apply,
- .owner = THIS_MODULE,
};
static const struct atmel_hlcdc_pwm_errata atmel_hlcdc_pwm_at91sam9x5_errata = {
@@ -191,39 +179,38 @@ static const struct atmel_hlcdc_pwm_errata atmel_hlcdc_pwm_sama5d3_errata = {
.div1_clk_erratum = true,
};
-#ifdef CONFIG_PM_SLEEP
static int atmel_hlcdc_pwm_suspend(struct device *dev)
{
- struct atmel_hlcdc_pwm *chip = dev_get_drvdata(dev);
+ struct pwm_chip *chip = dev_get_drvdata(dev);
+ struct atmel_hlcdc_pwm *atmel = to_atmel_hlcdc_pwm(chip);
+ struct pwm_device *pwm = &chip->pwms[0];
/* Keep the periph clock enabled if the PWM is still running. */
- if (pwm_is_enabled(&chip->chip.pwms[0]))
- clk_disable_unprepare(chip->hlcdc->periph_clk);
+ if (!pwm->state.enabled)
+ clk_disable_unprepare(atmel->hlcdc->periph_clk);
return 0;
}
static int atmel_hlcdc_pwm_resume(struct device *dev)
{
- struct atmel_hlcdc_pwm *chip = dev_get_drvdata(dev);
- struct pwm_state state;
+ struct pwm_chip *chip = dev_get_drvdata(dev);
+ struct atmel_hlcdc_pwm *atmel = to_atmel_hlcdc_pwm(chip);
+ struct pwm_device *pwm = &chip->pwms[0];
int ret;
- pwm_get_state(&chip->chip.pwms[0], &state);
-
/* Re-enable the periph clock it was stopped during suspend. */
- if (!state.enabled) {
- ret = clk_prepare_enable(chip->hlcdc->periph_clk);
+ if (!pwm->state.enabled) {
+ ret = clk_prepare_enable(atmel->hlcdc->periph_clk);
if (ret)
return ret;
}
- return atmel_hlcdc_pwm_apply(&chip->chip, &chip->chip.pwms[0], &state);
+ return atmel_hlcdc_pwm_apply(chip, pwm, &pwm->state);
}
-#endif
-static SIMPLE_DEV_PM_OPS(atmel_hlcdc_pwm_pm_ops,
- atmel_hlcdc_pwm_suspend, atmel_hlcdc_pwm_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(atmel_hlcdc_pwm_pm_ops,
+ atmel_hlcdc_pwm_suspend, atmel_hlcdc_pwm_resume);
static const struct of_device_id atmel_hlcdc_dt_ids[] = {
{
@@ -246,7 +233,8 @@ static const struct of_device_id atmel_hlcdc_dt_ids[] = {
.compatible = "atmel,sama5d4-hlcdc",
.data = &atmel_hlcdc_pwm_sama5d3_errata,
},
- { /* sentinel */ },
+ { .compatible = "microchip,sam9x60-hlcdc", },
+ { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, atmel_hlcdc_dt_ids);
@@ -254,15 +242,17 @@ static int atmel_hlcdc_pwm_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
struct device *dev = &pdev->dev;
- struct atmel_hlcdc_pwm *chip;
+ struct pwm_chip *chip;
+ struct atmel_hlcdc_pwm *atmel;
struct atmel_hlcdc *hlcdc;
int ret;
hlcdc = dev_get_drvdata(dev->parent);
- chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
- if (!chip)
- return -ENOMEM;
+ chip = devm_pwmchip_alloc(dev, 1, sizeof(*atmel));
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
+ atmel = to_atmel_hlcdc_pwm(chip);
ret = clk_prepare_enable(hlcdc->periph_clk);
if (ret)
@@ -270,17 +260,12 @@ static int atmel_hlcdc_pwm_probe(struct platform_device *pdev)
match = of_match_node(atmel_hlcdc_dt_ids, dev->parent->of_node);
if (match)
- chip->errata = match->data;
+ atmel->errata = match->data;
- chip->hlcdc = hlcdc;
- chip->chip.ops = &atmel_hlcdc_pwm_ops;
- chip->chip.dev = dev;
- chip->chip.base = -1;
- chip->chip.npwm = 1;
- chip->chip.of_xlate = of_pwm_xlate_with_flags;
- chip->chip.of_pwm_n_cells = 3;
+ atmel->hlcdc = hlcdc;
+ chip->ops = &atmel_hlcdc_pwm_ops;
- ret = pwmchip_add_with_polarity(&chip->chip, PWM_POLARITY_INVERSED);
+ ret = pwmchip_add(chip);
if (ret) {
clk_disable_unprepare(hlcdc->periph_clk);
return ret;
@@ -291,30 +276,27 @@ static int atmel_hlcdc_pwm_probe(struct platform_device *pdev)
return 0;
}
-static int atmel_hlcdc_pwm_remove(struct platform_device *pdev)
+static void atmel_hlcdc_pwm_remove(struct platform_device *pdev)
{
- struct atmel_hlcdc_pwm *chip = platform_get_drvdata(pdev);
- int ret;
+ struct pwm_chip *chip = platform_get_drvdata(pdev);
+ struct atmel_hlcdc_pwm *atmel = to_atmel_hlcdc_pwm(chip);
- ret = pwmchip_remove(&chip->chip);
- if (ret)
- return ret;
+ pwmchip_remove(chip);
- clk_disable_unprepare(chip->hlcdc->periph_clk);
-
- return 0;
+ clk_disable_unprepare(atmel->hlcdc->periph_clk);
}
static const struct of_device_id atmel_hlcdc_pwm_dt_ids[] = {
{ .compatible = "atmel,hlcdc-pwm" },
- { /* sentinel */ },
+ { /* sentinel */ }
};
+MODULE_DEVICE_TABLE(of, atmel_hlcdc_pwm_dt_ids);
static struct platform_driver atmel_hlcdc_pwm_driver = {
.driver = {
.name = "atmel-hlcdc-pwm",
.of_match_table = atmel_hlcdc_pwm_dt_ids,
- .pm = &atmel_hlcdc_pwm_pm_ops,
+ .pm = pm_ptr(&atmel_hlcdc_pwm_pm_ops),
},
.probe = atmel_hlcdc_pwm_probe,
.remove = atmel_hlcdc_pwm_remove,
generated by cgit (git 2.34.1) at 2025-12-22 11:19:41 +0000