[PATCH] watchdog: imxwd: get and enable clock

[PATCH] watchdog: imxwd: get and enable clock

[Steffen Trumtrar]

This it (at least) necessary for i.MX7s or otherwise barebox will hang
when trying to access the registers of WDOG2/3/4.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
---
 drivers/watchdog/imxwd.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/watchdog/imxwd.c b/drivers/watchdog/imxwd.c
index b2cfd1cd3a31..26c62b7bcb31 100644
--- a/drivers/watchdog/imxwd.c
+++ b/drivers/watchdog/imxwd.c
@@ -21,6 +21,7 @@
 #include <restart.h>
 #include <watchdog.h>
 #include <reset_source.h>
+#include <linux/clk.h>
 
 struct imx_wd;
 
@@ -224,6 +225,7 @@ static int imx_wd_probe(struct device_d *dev)
 {
 	struct resource *iores;
 	struct imx_wd *priv;
+	struct clk *clk;
 	void *ops;
 	int ret;
 
@@ -237,6 +239,15 @@ static int imx_wd_probe(struct device_d *dev)
 		dev_err(dev, "could not get memory region\n");
 		return PTR_ERR(iores);
 	}
+
+	clk = clk_get(dev, NULL);
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+
+	ret = clk_enable(clk);
+	if (ret)
+		return ret;
+
 	priv->base = IOMEM(iores->start);
 	priv->ops = ops;
 	priv->wd.set_timeout = imx_watchdog_set_timeout;
-- 
2.29.2


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Re: [PATCH] watchdog: imxwd: get and enable clock

[Sascha Hauer]

On Mon, Apr 19, 2021 at 02:37:47PM +0200, Steffen Trumtrar wrote:
> This it (at least) necessary for i.MX7s or otherwise barebox will hang
> when trying to access the registers of WDOG2/3/4.
> 
> Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
> ---
>  drivers/watchdog/imxwd.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)

Applied, thanks

Sascha

> 
> diff --git a/drivers/watchdog/imxwd.c b/drivers/watchdog/imxwd.c
> index b2cfd1cd3a31..26c62b7bcb31 100644
> --- a/drivers/watchdog/imxwd.c
> +++ b/drivers/watchdog/imxwd.c
> @@ -21,6 +21,7 @@
>  #include <restart.h>
>  #include <watchdog.h>
>  #include <reset_source.h>
> +#include <linux/clk.h>
>  
>  struct imx_wd;
>  
> @@ -224,6 +225,7 @@ static int imx_wd_probe(struct device_d *dev)
>  {
>  	struct resource *iores;
>  	struct imx_wd *priv;
> +	struct clk *clk;
>  	void *ops;
>  	int ret;
>  
> @@ -237,6 +239,15 @@ static int imx_wd_probe(struct device_d *dev)
>  		dev_err(dev, "could not get memory region\n");
>  		return PTR_ERR(iores);
>  	}
> +
> +	clk = clk_get(dev, NULL);
> +	if (IS_ERR(clk))
> +		return PTR_ERR(clk);
> +
> +	ret = clk_enable(clk);
> +	if (ret)
> +		return ret;
> +
>  	priv->base = IOMEM(iores->start);
>  	priv->ops = ops;
>  	priv->wd.set_timeout = imx_watchdog_set_timeout;
> -- 
> 2.29.2
> 
> 
> _______________________________________________
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> barebox@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/barebox
> 

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