On Thu, Oct 28, 2021 at 10:23:18AM -0700, Florian Fainelli wrote:
> The BCM7038 watchdog driver needs to be able to obtain a specific clock
> name on BCM63xx platforms which is the "periph" clock ticking at 50MHz.
> make it possible to specify the clock name to obtain via platform data.
>
> Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
> ---
> drivers/watchdog/bcm7038_wdt.c | 8 +++++++-
> include/linux/platform_data/bcm7038_wdt.h | 8 ++++++++
> 2 files changed, 15 insertions(+), 1 deletion(-)
> create mode 100644 include/linux/platform_data/bcm7038_wdt.h
>
> diff --git a/drivers/watchdog/bcm7038_wdt.c b/drivers/watchdog/bcm7038_wdt.c
> index acaaa0005d5b..506cd7ef9c77 100644
> --- a/drivers/watchdog/bcm7038_wdt.c
> +++ b/drivers/watchdog/bcm7038_wdt.c
> @@ -10,6 +10,7 @@
> #include <linux/module.h>
> #include <linux/of.h>
> #include <linux/platform_device.h>
> +#include <linux/platform_data/bcm7038_wdt.h>
> #include <linux/pm.h>
> #include <linux/watchdog.h>
>
> @@ -133,8 +134,10 @@ static void bcm7038_clk_disable_unprepare(void *data)
>
> static int bcm7038_wdt_probe(struct platform_device *pdev)
> {
> + struct bcm7038_wdt_platform_data *pdata = pdev->dev.platform_data;
> struct device *dev = &pdev->dev;
> struct bcm7038_watchdog *wdt;
> + const char *clk_name = NULL;
> int err;
>
> wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
> @@ -147,7 +150,10 @@ static int bcm7038_wdt_probe(struct platform_device *pdev)
> if (IS_ERR(wdt->base))
> return PTR_ERR(wdt->base);
>
> - wdt->clk = devm_clk_get(dev, NULL);
> + if (pdata && pdata->clk_name)
> + clk_name = pdata->clk_name;
> +
> + wdt->clk = devm_clk_get(dev, clk_name);
> /* If unable to get clock, use default frequency */
> if (!IS_ERR(wdt->clk)) {
> err = clk_prepare_enable(wdt->clk);
> diff --git a/include/linux/platform_data/bcm7038_wdt.h b/include/linux/platform_data/bcm7038_wdt.h
> new file mode 100644
> index 000000000000..e18cfd9ec8f9
> --- /dev/null
> +++ b/include/linux/platform_data/bcm7038_wdt.h
> @@ -0,0 +1,8 @@
> +#ifndef __BCM7038_WDT_PDATA_H
> +#define __BCM7038_WDT_PDATA_H
> +
> +struct bcm7038_wdt_platform_data {
> + const char *clk_name;
> +};
> +
> +#endif /* __BCM7038_WDT_PDATA_H */
> --
> 2.25.1
>
