pwm: pxa: Add optional reset control

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 df08fff8add2 ("pwm: pxa: Improve using dev_err_probe()")]
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>

diff --git a/drivers/pwm/pwm-pxa.c b/drivers/pwm/pwm-pxa.c
index 8a4a3d2df30debe4abf4cf1a072efc6c511f2aad..0f5bdb0e395ea0a0e4dc2481e2e19e5e8a2a9e8a 100644 (file)
--- a/drivers/pwm/pwm-pxa.c
+++ b/drivers/pwm/pwm-pxa.c
@@ -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))