Provides runtime PM callbacks to enable and disable clock resources
when idle. Also support system PM callbacks to be called during system
suspend and resume.
Signed-off-by: Pramod Gurav <[email protected]>
---
Tested on DB410C.
Changes in v4:
- Remove calls to sdhci_runtime_resume_host/sdhci_runtime_suspend_host
from runtime callbacks as sdhc msm controller is capable of restoring
it's register values after clocks are disabled and re-enabled.
Changes in v3:
- Added CONFIG_PM around runtime pm function.
- Replaced msm suspend/resume with generic function directly
- Use SET_SYSTEM_SLEEP_PM_OPS instead of late version
Changes in v2:
- Moved pm_rutime enabling before adding host
- Handled pm_rutime in remove
- Changed runtime handling with reference from sdhci-of-at91.c
drivers/mmc/host/sdhci-msm.c | 66 +++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 65 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index 8ef44a2a..33ec809 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -18,6 +18,7 @@
#include <linux/of_device.h>
#include <linux/delay.h>
#include <linux/mmc/mmc.h>
+#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include "sdhci-pltfm.h"
@@ -658,12 +659,26 @@ static int sdhci_msm_probe(struct platform_device *pdev)
goto clk_disable;
}
+ pm_runtime_get_noresume(&pdev->dev);
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
+ pm_runtime_use_autosuspend(&pdev->dev);
+
ret = sdhci_add_host(host);
if (ret)
- goto clk_disable;
+ goto pm_runtime_disable;
+
+ platform_set_drvdata(pdev, host);
+
+ pm_runtime_put_autosuspend(&pdev->dev);
return 0;
+pm_runtime_disable:
+ pm_runtime_disable(&pdev->dev);
+ pm_runtime_set_suspended(&pdev->dev);
+ pm_runtime_put_noidle(&pdev->dev);
clk_disable:
clk_disable_unprepare(msm_host->clk);
pclk_disable:
@@ -685,6 +700,11 @@ static int sdhci_msm_remove(struct platform_device *pdev)
0xffffffff);
sdhci_remove_host(host, dead);
+
+ pm_runtime_get_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+ pm_runtime_put_noidle(&pdev->dev);
+
clk_disable_unprepare(msm_host->clk);
clk_disable_unprepare(msm_host->pclk);
if (!IS_ERR(msm_host->bus_clk))
@@ -693,12 +713,56 @@ static int sdhci_msm_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM
+static int sdhci_msm_runtime_suspend(struct device *dev)
+{
+ struct sdhci_host *host = dev_get_drvdata(dev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
+
+ clk_disable_unprepare(msm_host->clk);
+ clk_disable_unprepare(msm_host->pclk);
+
+ return 0;
+}
+
+static int sdhci_msm_runtime_resume(struct device *dev)
+{
+ struct sdhci_host *host = dev_get_drvdata(dev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
+ int ret;
+
+ ret = clk_prepare_enable(msm_host->clk);
+ if (ret) {
+ dev_err(dev, "clk_enable failed: %d\n", ret);
+ return ret;
+ }
+ ret = clk_prepare_enable(msm_host->pclk);
+ if (ret) {
+ dev_err(dev, "clk_enable failed: %d\n", ret);
+ clk_disable_unprepare(msm_host->clk);
+ return ret;
+ }
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops sdhci_msm_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+ SET_RUNTIME_PM_OPS(sdhci_msm_runtime_suspend, sdhci_msm_runtime_resume,
+ NULL)
+};
+
static struct platform_driver sdhci_msm_driver = {
.probe = sdhci_msm_probe,
.remove = sdhci_msm_remove,
.driver = {
.name = "sdhci_msm",
.of_match_table = sdhci_msm_dt_match,
+ .pm = &sdhci_msm_pm_ops,
},
};
--
2.9.3
Hi Pramod,
Thanks for the patch!
On 10/18/2016 01:16 PM, Pramod Gurav wrote:
> Provides runtime PM callbacks to enable and disable clock resources
> when idle. Also support system PM callbacks to be called during system
> suspend and resume.
>
> Signed-off-by: Pramod Gurav <[email protected]>
> ---
>
> Tested on DB410C.
>
[..]
> +static int sdhci_msm_runtime_resume(struct device *dev)
> +{
> + struct sdhci_host *host = dev_get_drvdata(dev);
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
> + int ret;
> +
> + ret = clk_prepare_enable(msm_host->clk);
> + if (ret) {
> + dev_err(dev, "clk_enable failed: %d\n", ret);
> + return ret;
> + }
> + ret = clk_prepare_enable(msm_host->pclk);
> + if (ret) {
> + dev_err(dev, "clk_enable failed: %d\n", ret);
Nit: Maybe mention in the prints which clock failed - core or peripheral.
> + clk_disable_unprepare(msm_host->clk);
> + return ret;
> + }
> +
> + return 0;
> +}
> +#endif
> +
> +static const struct dev_pm_ops sdhci_msm_pm_ops = {
> + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
> + pm_runtime_force_resume)
Nit: Please align with the parenthesis.
> + SET_RUNTIME_PM_OPS(sdhci_msm_runtime_suspend, sdhci_msm_runtime_resume,
> + NULL)
Ditto.
Reviewed-by: Georgi Djakov <[email protected]>
BR,
Georgi
Hi Pramod,
Thanks for this patch. Few minor comments.
I have tested your patch on db410c and 8996 based internal platform and
it works fine.
On 10/18/2016 3:46 PM, Pramod Gurav wrote:
> Provides runtime PM callbacks to enable and disable clock resources
> when idle. Also support system PM callbacks to be called during system
> suspend and resume.
>
> Signed-off-by: Pramod Gurav <[email protected]>
> ---
>
> Tested on DB410C.
>
> Changes in v4:
> - Remove calls to sdhci_runtime_resume_host/sdhci_runtime_suspend_host
> from runtime callbacks as sdhc msm controller is capable of restoring
> it's register values after clocks are disabled and re-enabled.
>
> Changes in v3:
> - Added CONFIG_PM around runtime pm function.
> - Replaced msm suspend/resume with generic function directly
> - Use SET_SYSTEM_SLEEP_PM_OPS instead of late version
>
> Changes in v2:
> - Moved pm_rutime enabling before adding host
> - Handled pm_rutime in remove
> - Changed runtime handling with reference from sdhci-of-at91.c
>
> drivers/mmc/host/sdhci-msm.c | 66 +++++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 65 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
> index 8ef44a2a..33ec809 100644
> --- a/drivers/mmc/host/sdhci-msm.c
> +++ b/drivers/mmc/host/sdhci-msm.c
> @@ -18,6 +18,7 @@
> #include <linux/of_device.h>
> #include <linux/delay.h>
> #include <linux/mmc/mmc.h>
> +#include <linux/pm_runtime.h>
> #include <linux/slab.h>
>
> #include "sdhci-pltfm.h"
> @@ -658,12 +659,26 @@ static int sdhci_msm_probe(struct platform_device *pdev)
> goto clk_disable;
> }
>
> + pm_runtime_get_noresume(&pdev->dev);
> + pm_runtime_set_active(&pdev->dev);
> + pm_runtime_enable(&pdev->dev);
> + pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
Use a macro MSM_MMC_AUTOSUSPEND_DELAY_MS instead of using 50 directly here.
> + pm_runtime_use_autosuspend(&pdev->dev);
> +
> ret = sdhci_add_host(host);
> if (ret)
> - goto clk_disable;
> + goto pm_runtime_disable;
> +
> + platform_set_drvdata(pdev, host);
No need to set platform_set_drvdata here. sdhci_pltfm_init will do it
anyways.
> +
pm_runtime_mark_last_busy(&pdev->dev) can be added here.
> + pm_runtime_put_autosuspend(&pdev->dev);
>
> return 0;
>
> +pm_runtime_disable:
> + pm_runtime_disable(&pdev->dev);
> + pm_runtime_set_suspended(&pdev->dev);
> + pm_runtime_put_noidle(&pdev->dev);
> clk_disable:
> clk_disable_unprepare(msm_host->clk);
> pclk_disable:
> @@ -685,6 +700,11 @@ static int sdhci_msm_remove(struct platform_device *pdev)
> 0xffffffff);
>
> sdhci_remove_host(host, dead);
> +
> + pm_runtime_get_sync(&pdev->dev);
> + pm_runtime_disable(&pdev->dev);
> + pm_runtime_put_noidle(&pdev->dev);
> +
> clk_disable_unprepare(msm_host->clk);
> clk_disable_unprepare(msm_host->pclk);
> if (!IS_ERR(msm_host->bus_clk))
> @@ -693,12 +713,56 @@ static int sdhci_msm_remove(struct platform_device *pdev)
> return 0;
> }
>
> +#ifdef CONFIG_PM
> +static int sdhci_msm_runtime_suspend(struct device *dev)
> +{
> + struct sdhci_host *host = dev_get_drvdata(dev);
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
> +
> + clk_disable_unprepare(msm_host->clk);
> + clk_disable_unprepare(msm_host->pclk);
> +
> + return 0;
> +}
> +
> +static int sdhci_msm_runtime_resume(struct device *dev)
> +{
> + struct sdhci_host *host = dev_get_drvdata(dev);
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
> + int ret;
> +
> + ret = clk_prepare_enable(msm_host->clk);
> + if (ret) {
> + dev_err(dev, "clk_enable failed: %d\n", ret);
dev_err(dev, "clk enable failed for core_clk: %d\n", ret);
> + return ret;
> + }
> + ret = clk_prepare_enable(msm_host->pclk);
> + if (ret) {
> + dev_err(dev, "clk_enable failed: %d\n", ret);
dev_err(dev, "clk enable failed for iface_clk: %d\n", ret);
> + clk_disable_unprepare(msm_host->clk);
> + return ret;
> + }
> +
> + return 0;
> +}
> +#endif
> +
> +static const struct dev_pm_ops sdhci_msm_pm_ops = {
> + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
> + pm_runtime_force_resume)
> + SET_RUNTIME_PM_OPS(sdhci_msm_runtime_suspend, sdhci_msm_runtime_resume,
> + NULL)
> +};
> +
> static struct platform_driver sdhci_msm_driver = {
> .probe = sdhci_msm_probe,
> .remove = sdhci_msm_remove,
> .driver = {
> .name = "sdhci_msm",
> .of_match_table = sdhci_msm_dt_match,
> + .pm = &sdhci_msm_pm_ops,
> },
> };
>
>
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
Thanks Georgi for the review.
On 20 October 2016 at 18:38, Georgi Djakov <[email protected]> wrote:
> Hi Pramod,
>
> Thanks for the patch!
>
> On 10/18/2016 01:16 PM, Pramod Gurav wrote:
>>
>> Provides runtime PM callbacks to enable and disable clock resources
>> when idle. Also support system PM callbacks to be called during system
>> suspend and resume.
>>
>> Signed-off-by: Pramod Gurav <[email protected]>
>> ---
>>
>> Tested on DB410C.
>>
>
> [..]
>
>> +static int sdhci_msm_runtime_resume(struct device *dev)
>> +{
>> + struct sdhci_host *host = dev_get_drvdata(dev);
>> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
>> + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
>> + int ret;
>> +
>> + ret = clk_prepare_enable(msm_host->clk);
>> + if (ret) {
>> + dev_err(dev, "clk_enable failed: %d\n", ret);
>> + return ret;
>> + }
>> + ret = clk_prepare_enable(msm_host->pclk);
>> + if (ret) {
>> + dev_err(dev, "clk_enable failed: %d\n", ret);
>
>
> Nit: Maybe mention in the prints which clock failed - core or peripheral.
Agree. Will add in v5.
>
>> + clk_disable_unprepare(msm_host->clk);
>> + return ret;
>> + }
>> +
>> + return 0;
>> +}
>> +#endif
>> +
>> +static const struct dev_pm_ops sdhci_msm_pm_ops = {
>> + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
>> + pm_runtime_force_resume)
>
>
> Nit: Please align with the parenthesis.
>
>> + SET_RUNTIME_PM_OPS(sdhci_msm_runtime_suspend,
>> sdhci_msm_runtime_resume,
>> + NULL)
>
>
> Ditto.
Yes. Will take care of this as well.
>
> Reviewed-by: Georgi Djakov <[email protected]>
Thanks again. :)
>
> BR,
> Georgi
Hi Ritesh,
On 20 October 2016 at 20:20, Ritesh Harjani <[email protected]> wrote:
> Hi Pramod,
>
> Thanks for this patch. Few minor comments.
>
> I have tested your patch on db410c and 8996 based internal platform and it
> works fine.
Thanks for the review and testing.
>
>
>
> On 10/18/2016 3:46 PM, Pramod Gurav wrote:
>>
>> Provides runtime PM callbacks to enable and disable clock resources
>> when idle. Also support system PM callbacks to be called during system
>> suspend and resume.
>>
>> Signed-off-by: Pramod Gurav <[email protected]>
>> ---
>>
>> Tested on DB410C.
>>
>> Changes in v4:
>> - Remove calls to sdhci_runtime_resume_host/sdhci_runtime_suspend_host
>> from runtime callbacks as sdhc msm controller is capable of restoring
>> it's register values after clocks are disabled and re-enabled.
>>
>> Changes in v3:
>> - Added CONFIG_PM around runtime pm function.
>> - Replaced msm suspend/resume with generic function directly
>> - Use SET_SYSTEM_SLEEP_PM_OPS instead of late version
>>
>> Changes in v2:
>> - Moved pm_rutime enabling before adding host
>> - Handled pm_rutime in remove
>> - Changed runtime handling with reference from sdhci-of-at91.c
>>
>> drivers/mmc/host/sdhci-msm.c | 66
>> +++++++++++++++++++++++++++++++++++++++++++-
>> 1 file changed, 65 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
>> index 8ef44a2a..33ec809 100644
>> --- a/drivers/mmc/host/sdhci-msm.c
>> +++ b/drivers/mmc/host/sdhci-msm.c
>> @@ -18,6 +18,7 @@
>> #include <linux/of_device.h>
>> #include <linux/delay.h>
>> #include <linux/mmc/mmc.h>
>> +#include <linux/pm_runtime.h>
>> #include <linux/slab.h>
>>
>> #include "sdhci-pltfm.h"
>> @@ -658,12 +659,26 @@ static int sdhci_msm_probe(struct platform_device
>> *pdev)
>> goto clk_disable;
>> }
>>
>> + pm_runtime_get_noresume(&pdev->dev);
>> + pm_runtime_set_active(&pdev->dev);
>> + pm_runtime_enable(&pdev->dev);
>> + pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
>
> Use a macro MSM_MMC_AUTOSUSPEND_DELAY_MS instead of using 50 directly here.
Will add.
>
>> + pm_runtime_use_autosuspend(&pdev->dev);
>> +
>> ret = sdhci_add_host(host);
>> if (ret)
>> - goto clk_disable;
>> + goto pm_runtime_disable;
>> +
>> + platform_set_drvdata(pdev, host);
>
> No need to set platform_set_drvdata here. sdhci_pltfm_init will do it
> anyways.
Good to know this. Will do away with this.
>
>> +
>
> pm_runtime_mark_last_busy(&pdev->dev) can be added here.
Yeah. Agree.
>
>> + pm_runtime_put_autosuspend(&pdev->dev);
>>
>> return 0;
>>
>> +pm_runtime_disable:
>> + pm_runtime_disable(&pdev->dev);
>> + pm_runtime_set_suspended(&pdev->dev);
>> + pm_runtime_put_noidle(&pdev->dev);
>> clk_disable:
>> clk_disable_unprepare(msm_host->clk);
>> pclk_disable:
>> @@ -685,6 +700,11 @@ static int sdhci_msm_remove(struct platform_device
>> *pdev)
>> 0xffffffff);
>>
>> sdhci_remove_host(host, dead);
>> +
>> + pm_runtime_get_sync(&pdev->dev);
>> + pm_runtime_disable(&pdev->dev);
>> + pm_runtime_put_noidle(&pdev->dev);
>> +
>> clk_disable_unprepare(msm_host->clk);
>> clk_disable_unprepare(msm_host->pclk);
>> if (!IS_ERR(msm_host->bus_clk))
>> @@ -693,12 +713,56 @@ static int sdhci_msm_remove(struct platform_device
>> *pdev)
>> return 0;
>> }
>>
>> +#ifdef CONFIG_PM
>> +static int sdhci_msm_runtime_suspend(struct device *dev)
>> +{
>> + struct sdhci_host *host = dev_get_drvdata(dev);
>> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
>> + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
>> +
>> + clk_disable_unprepare(msm_host->clk);
>> + clk_disable_unprepare(msm_host->pclk);
>> +
>> + return 0;
>> +}
>> +
>> +static int sdhci_msm_runtime_resume(struct device *dev)
>> +{
>> + struct sdhci_host *host = dev_get_drvdata(dev);
>> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
>> + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
>> + int ret;
>> +
>> + ret = clk_prepare_enable(msm_host->clk);
>> + if (ret) {
>> + dev_err(dev, "clk_enable failed: %d\n", ret);
>
> dev_err(dev, "clk enable failed for core_clk: %d\n", ret);
>
>> + return ret;
>> + }
>> + ret = clk_prepare_enable(msm_host->pclk);
>> + if (ret) {
>> + dev_err(dev, "clk_enable failed: %d\n", ret);
>
> dev_err(dev, "clk enable failed for iface_clk: %d\n", ret);
>
Yes. will do these changes. Thanks for comments. :)
>> + clk_disable_unprepare(msm_host->clk);
>> + return ret;
>> + }
>> +
>> + return 0;
>> +}
>> +#endif
>> +
>> +static const struct dev_pm_ops sdhci_msm_pm_ops = {
>> + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
>> + pm_runtime_force_resume)
>> + SET_RUNTIME_PM_OPS(sdhci_msm_runtime_suspend,
>> sdhci_msm_runtime_resume,
>> + NULL)
>> +};
>> +
>> static struct platform_driver sdhci_msm_driver = {
>> .probe = sdhci_msm_probe,
>> .remove = sdhci_msm_remove,
>> .driver = {
>> .name = "sdhci_msm",
>> .of_match_table = sdhci_msm_dt_match,
>> + .pm = &sdhci_msm_pm_ops,
>> },
>> };
>>
>>
>
> --
> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
> a Linux Foundation Collaborative Project