[PATCH] drivers: qcom: rpmh-rsc: Check cmd_db_ready() to help children

[PATCH] drivers: qcom: rpmh-rsc: Check cmd_db_ready() to help children

[Douglas Anderson]

Children of RPMh will need access to cmd_db.  Rather than having each
child have code to check if cmd_db is ready let's add the check to
RPMh.

Suggested-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
---
This code is based upon v11 of Lina and Raju's RPMh series.

With this we'll be able to remove this boilerplate code from
clk-rpmh.c and qcom-rpmh-regulator.c.  Neither of these files has
landed upstream yet but patches are pretty far along.

 drivers/soc/qcom/rpmh-rsc.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c
index 144a058407c0..ad85523bdd3b 100644
--- a/drivers/soc/qcom/rpmh-rsc.c
+++ b/drivers/soc/qcom/rpmh-rsc.c
@@ -18,6 +18,7 @@
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 
+#include <soc/qcom/cmd-db.h>
 #include <soc/qcom/tcs.h>
 #include <dt-bindings/soc/qcom,rpmh-rsc.h>
 
@@ -621,6 +622,18 @@ static int rpmh_rsc_probe(struct platform_device *pdev)
 	struct rsc_drv *drv;
 	int ret, irq;
 
+	/*
+	 * Even though RPMh doesn't directly use cmd-db, all of its children
+	 * do.  To avoid adding this check to our children we'll do it now.
+	 */
+	ret = cmd_db_ready();
+	if (ret) {
+		if (ret != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "Command DB not available (%d)\n",
+									ret);
+		return ret;
+	}
+
 	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
 	if (!drv)
 		return -ENOMEM;
-- 
2.18.0.rc1.244.gcf134e6275-goog

Re: [PATCH] drivers: qcom: rpmh-rsc: Check cmd_db_ready() to help children

[Lina Iyer]

On Mon, Jun 18 2018 at 11:23 -0600, Douglas Anderson wrote:
>Children of RPMh will need access to cmd_db.  Rather than having each
>child have code to check if cmd_db is ready let's add the check to
>RPMh.
>
>Suggested-by: Stephen Boyd <sboyd@kernel.org>
>Signed-off-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Lina Iyer <ilina@codeaurora.org>
>---
>This code is based upon v11 of Lina and Raju's RPMh series.
>
>With this we'll be able to remove this boilerplate code from
>clk-rpmh.c and qcom-rpmh-regulator.c.  Neither of these files has
>landed upstream yet but patches are pretty far along.
>
> drivers/soc/qcom/rpmh-rsc.c | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
>diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c
>index 144a058407c0..ad85523bdd3b 100644
>--- a/drivers/soc/qcom/rpmh-rsc.c
>+++ b/drivers/soc/qcom/rpmh-rsc.c
>@@ -18,6 +18,7 @@
> #include <linux/slab.h>
> #include <linux/spinlock.h>
>
>+#include <soc/qcom/cmd-db.h>
> #include <soc/qcom/tcs.h>
> #include <dt-bindings/soc/qcom,rpmh-rsc.h>
>
>@@ -621,6 +622,18 @@ static int rpmh_rsc_probe(struct platform_device *pdev)
> 	struct rsc_drv *drv;
> 	int ret, irq;
>
>+	/*
>+	 * Even though RPMh doesn't directly use cmd-db, all of its children
>+	 * do.  To avoid adding this check to our children we'll do it now.
nit: Double space before To
>+	 */
>+	ret = cmd_db_ready();
>+	if (ret) {
>+		if (ret != -EPROBE_DEFER)
>+			dev_err(&pdev->dev, "Command DB not available (%d)\n",
>+									ret);
>+		return ret;
>+	}
>+
> 	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
> 	if (!drv)
> 		return -ENOMEM;
>--
>2.18.0.rc1.244.gcf134e6275-goog
>

Re: [PATCH] drivers: qcom: rpmh-rsc: Check cmd_db_ready() to help children

[Bjorn Andersson]

On Mon 18 Jun 10:22 PDT 2018, Douglas Anderson wrote:

> Children of RPMh will need access to cmd_db.  Rather than having each
> child have code to check if cmd_db is ready let's add the check to
> RPMh.
> 
> Suggested-by: Stephen Boyd <sboyd@kernel.org>
> Signed-off-by: Douglas Anderson <dianders@chromium.org>

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Regards,
Bjorn

> ---
> This code is based upon v11 of Lina and Raju's RPMh series.
> 
> With this we'll be able to remove this boilerplate code from
> clk-rpmh.c and qcom-rpmh-regulator.c.  Neither of these files has
> landed upstream yet but patches are pretty far along.
> 
>  drivers/soc/qcom/rpmh-rsc.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c
> index 144a058407c0..ad85523bdd3b 100644
> --- a/drivers/soc/qcom/rpmh-rsc.c
> +++ b/drivers/soc/qcom/rpmh-rsc.c
> @@ -18,6 +18,7 @@
>  #include <linux/slab.h>
>  #include <linux/spinlock.h>
>  
> +#include <soc/qcom/cmd-db.h>
>  #include <soc/qcom/tcs.h>
>  #include <dt-bindings/soc/qcom,rpmh-rsc.h>
>  
> @@ -621,6 +622,18 @@ static int rpmh_rsc_probe(struct platform_device *pdev)
>  	struct rsc_drv *drv;
>  	int ret, irq;
>  
> +	/*
> +	 * Even though RPMh doesn't directly use cmd-db, all of its children
> +	 * do.  To avoid adding this check to our children we'll do it now.
> +	 */
> +	ret = cmd_db_ready();
> +	if (ret) {
> +		if (ret != -EPROBE_DEFER)
> +			dev_err(&pdev->dev, "Command DB not available (%d)\n",
> +									ret);
> +		return ret;
> +	}
> +
>  	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
>  	if (!drv)
>  		return -ENOMEM;
> -- 
> 2.18.0.rc1.244.gcf134e6275-goog
> 
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