Re: [PATCH 2/2] pwm: pxa: Add optional bus clock

Uwe Kleine-König
2026-04-13T08:38:19Z

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Hello,

On Thu, Apr 09, 2026 at 12:45:12AM +0000, Yixun Lan wrote:
> Add one secondary optional bus clock for the PWM PXA driver, also keep it
> compatible with old single clock.
>
> The SpacemiT K3 SoC require one bus clock for PWM controller, acquire

s/one/a/ ?

> and enable it during probe phase.
>
> Signed-off-by: Yixun Lan <dlan@kernel.org>
> ---
> drivers/pwm/pwm-pxa.c | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pwm/pwm-pxa.c b/drivers/pwm/pwm-pxa.c
> index 0f5bdb0e395e..2ace31405c2d 100644
> --- a/drivers/pwm/pwm-pxa.c
> +++ b/drivers/pwm/pwm-pxa.c
> @@ -53,6 +53,7 @@ struct pxa_pwm_chip {
> struct device *dev;
>
> struct clk *clk;
> + struct clk *bus_clk;
> void __iomem *mmio_base;
> };
>
> @@ -177,7 +178,12 @@ static int pwm_probe(struct platform_device *pdev)
> return PTR_ERR(chip);
> pc = to_pxa_pwm_chip(chip);
>
> - pc->clk = devm_clk_get(dev, NULL);
> + pc->bus_clk = devm_clk_get_optional_enabled(dev, "bus");
> + if (IS_ERR(pc->bus_clk))
> + return dev_err_probe(dev, PTR_ERR(pc->bus_clk), "Failed to get bus clock\n");
> +
> + /* Get named func clk if bus clock is valid */
> + pc->clk = devm_clk_get(dev, pc->bus_clk ? "func" : NULL);

A local variable for bus_clk would be sufficient.

I'm not sure, but I think passing "func" unconditionally to
devm_clk_get() would also work fine.

Best regards
Uwe

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