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pwm: pxa: Add optional reset control

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Support optional reset control for the PWM PXA driver.

During probe, it acquires the reset controller using
devm_reset_control_get_optional_exclusive_deasserted() to get and deassert
the reset controller to enable the PWM channel.

Signed-off-by: Guodong Xu <guodong@riscstar.com>
Link: https://lore.kernel.org/r/20250429085048.1310409-3-guodong@riscstar.com
[ukleinek: Fix conflict with commit df08fff8ad ("pwm: pxa: Improve using dev_err_probe()")]
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
This commit is contained in:
Guodong Xu 2025-04-29 16:50:44 +08:00 committed by Uwe Kleine-König
parent 08e0b98123
commit 52d2d14d9e
1 changed files with 6 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

6
drivers/pwm/pwm-pxa.c
View file

@ -25,6 +25,7 @@
#include <linux/io.h>
#include <linux/pwm.h>
#include <linux/of.h>
#include <linux/reset.h>
#include <asm/div64.h>
@ -161,6 +162,7 @@ static int pwm_probe(struct platform_device *pdev)
struct pwm_chip *chip;
struct pxa_pwm_chip *pc;
struct device *dev = &pdev->dev;
struct reset_control *rst;
int ret = 0;
if (IS_ENABLED(CONFIG_OF) && id == NULL)
@ -179,6 +181,10 @@ static int pwm_probe(struct platform_device *pdev)
if (IS_ERR(pc->clk))
return dev_err_probe(dev, PTR_ERR(pc->clk), "Failed to get clock\n");
rst = devm_reset_control_get_optional_exclusive_deasserted(dev, NULL);
if (IS_ERR(rst))
return PTR_ERR(rst);
chip->ops = &pxa_pwm_ops;
if (IS_ENABLED(CONFIG_OF))