[PATCH v2 0/4] mmc: sdhci: refactor PM in sdhci-pltfm add support PM for cadence port

[PATCH v2 0/4] mmc: sdhci: refactor PM in sdhci-pltfm add support PM for cadence port

[Masahiro Yamada]

[1] adds clk handling for suspend/resume hooks of sdhci-pltfm.
    This also cleans up sdhci-brcmstb.c and sdhci-sirf.c

[2] Drop unneeded #ifdef CONFIG_PM, which will be used by [4]

[3] exports suspend / resume, which will be used by [4]

[4] implements suspend / resume for sdhci-cadence.c



Masahiro Yamada (4):
  mmc: sdhci: enable/disable the clock in sdhci_pltfm_suspend/resume
  mmc: sdhci: remove #indef CONFIG_PM around function declarations
  mmc: sdhci-pltfm: export sdhci_pltfm_suspend/resume
  mmc: sdhci-cadence: add suspend / resume support

 drivers/mmc/host/sdhci-brcmstb.c | 37 +------------------
 drivers/mmc/host/sdhci-cadence.c | 77 +++++++++++++++++++++++++++++++++++-----
 drivers/mmc/host/sdhci-pltfm.c   | 22 ++++++++++--
 drivers/mmc/host/sdhci-pltfm.h   |  2 ++
 drivers/mmc/host/sdhci-sirf.c    | 39 +-------------------
 drivers/mmc/host/sdhci.h         |  4 ---
 6 files changed, 91 insertions(+), 90 deletions(-)

-- 
2.7.4

[PATCH v2 1/4] mmc: sdhci: enable/disable the clock in sdhci_pltfm_suspend/resume

[Masahiro Yamada]

This commit provides similar cleanups as commit 83eacdfa2529 ("mmc:
sdhci: disable the clock in sdhci_pltfm_unregister()") did for
unregister hooks.

Some drivers duplicate code to handle pltfm_host->clk in their own
hooks.  The clock can be handled in sdhci_pltfm.c so that drivers
can reuse sdhci_pltfm_pmops.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---

Changes in v2:
  - Fix build error reported by kbuild test robot

 drivers/mmc/host/sdhci-brcmstb.c | 37 +------------------------------------
 drivers/mmc/host/sdhci-pltfm.c   | 16 +++++++++++++++-
 drivers/mmc/host/sdhci-sirf.c    | 39 +--------------------------------------
 3 files changed, 17 insertions(+), 75 deletions(-)

diff --git a/drivers/mmc/host/sdhci-brcmstb.c b/drivers/mmc/host/sdhci-brcmstb.c
index e2f638338e8f..6d461fcdd663 100644
--- a/drivers/mmc/host/sdhci-brcmstb.c
+++ b/drivers/mmc/host/sdhci-brcmstb.c
@@ -21,41 +21,6 @@
 
 #include "sdhci-pltfm.h"
 
-#ifdef CONFIG_PM_SLEEP
-
-static int sdhci_brcmstb_suspend(struct device *dev)
-{
-	struct sdhci_host *host = dev_get_drvdata(dev);
-	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
-	int res;
-
-	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
-		mmc_retune_needed(host->mmc);
-
-	res = sdhci_suspend_host(host);
-	if (res)
-		return res;
-	clk_disable_unprepare(pltfm_host->clk);
-	return res;
-}
-
-static int sdhci_brcmstb_resume(struct device *dev)
-{
-	struct sdhci_host *host = dev_get_drvdata(dev);
-	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
-	int err;
-
-	err = clk_prepare_enable(pltfm_host->clk);
-	if (err)
-		return err;
-	return sdhci_resume_host(host);
-}
-
-#endif /* CONFIG_PM_SLEEP */
-
-static SIMPLE_DEV_PM_OPS(sdhci_brcmstb_pmops, sdhci_brcmstb_suspend,
-			sdhci_brcmstb_resume);
-
 static const struct sdhci_ops sdhci_brcmstb_ops = {
 	.set_clock = sdhci_set_clock,
 	.set_bus_width = sdhci_set_bus_width,
@@ -131,7 +96,7 @@ MODULE_DEVICE_TABLE(of, sdhci_brcm_of_match);
 static struct platform_driver sdhci_brcmstb_driver = {
 	.driver		= {
 		.name	= "sdhci-brcmstb",
-		.pm	= &sdhci_brcmstb_pmops,
+		.pm	= &sdhci_pltfm_pmops,
 		.of_match_table = of_match_ptr(sdhci_brcm_of_match),
 	},
 	.probe		= sdhci_brcmstb_probe,
diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
index e090d8c42ddb..be9a79d62e22 100644
--- a/drivers/mmc/host/sdhci-pltfm.c
+++ b/drivers/mmc/host/sdhci-pltfm.c
@@ -212,16 +212,30 @@ EXPORT_SYMBOL_GPL(sdhci_pltfm_unregister);
 static int sdhci_pltfm_suspend(struct device *dev)
 {
 	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	int ret;
 
 	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
 		mmc_retune_needed(host->mmc);
 
-	return sdhci_suspend_host(host);
+	ret = sdhci_suspend_host(host);
+	if (ret)
+		return ret;
+
+	clk_disable_unprepare(pltfm_host->clk);
+
+	return 0;
 }
 
 static int sdhci_pltfm_resume(struct device *dev)
 {
 	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	int ret;
+
+	ret = clk_prepare_enable(pltfm_host->clk);
+	if (ret)
+		return ret;
 
 	return sdhci_resume_host(host);
 }
diff --git a/drivers/mmc/host/sdhci-sirf.c b/drivers/mmc/host/sdhci-sirf.c
index c251c6c0a112..0c7aa89df4e2 100644
--- a/drivers/mmc/host/sdhci-sirf.c
+++ b/drivers/mmc/host/sdhci-sirf.c
@@ -230,43 +230,6 @@ static int sdhci_sirf_probe(struct platform_device *pdev)
 	return ret;
 }
 
-#ifdef CONFIG_PM_SLEEP
-static int sdhci_sirf_suspend(struct device *dev)
-{
-	struct sdhci_host *host = dev_get_drvdata(dev);
-	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
-	int ret;
-
-	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
-		mmc_retune_needed(host->mmc);
-
-	ret = sdhci_suspend_host(host);
-	if (ret)
-		return ret;
-
-	clk_disable(pltfm_host->clk);
-
-	return 0;
-}
-
-static int sdhci_sirf_resume(struct device *dev)
-{
-	struct sdhci_host *host = dev_get_drvdata(dev);
-	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
-	int ret;
-
-	ret = clk_enable(pltfm_host->clk);
-	if (ret) {
-		dev_dbg(dev, "Resume: Error enabling clock\n");
-		return ret;
-	}
-
-	return sdhci_resume_host(host);
-}
-#endif
-
-static SIMPLE_DEV_PM_OPS(sdhci_sirf_pm_ops, sdhci_sirf_suspend, sdhci_sirf_resume);
-
 static const struct of_device_id sdhci_sirf_of_match[] = {
 	{ .compatible = "sirf,prima2-sdhc" },
 	{ }
@@ -277,7 +240,7 @@ static struct platform_driver sdhci_sirf_driver = {
 	.driver		= {
 		.name	= "sdhci-sirf",
 		.of_match_table = sdhci_sirf_of_match,
-		.pm	= &sdhci_sirf_pm_ops,
+		.pm	= &sdhci_pltfm_pmops,
 	},
 	.probe		= sdhci_sirf_probe,
 	.remove		= sdhci_pltfm_unregister,
-- 
2.7.4

[PATCH v2 1/4] mmc: sdhci: enable/disable the clock in sdhci_pltfm_suspend/resume

[Adrian Hunter]

On 03/08/17 04:44, Masahiro Yamada wrote:
> This commit provides similar cleanups as commit 83eacdfa2529 ("mmc:
> sdhci: disable the clock in sdhci_pltfm_unregister()") did for
> unregister hooks.
> 
> Some drivers duplicate code to handle pltfm_host->clk in their own
> hooks.  The clock can be handled in sdhci_pltfm.c so that drivers
> can reuse sdhci_pltfm_pmops.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

I would like to some see Acks from other driver maintainers including ones
that did not previously clk_disable_unprepare(pltfm_host->clk) in suspend
but now do. e.g. sdhci-tegra

> ---
> 
> Changes in v2:
>   - Fix build error reported by kbuild test robot
> 
>  drivers/mmc/host/sdhci-brcmstb.c | 37 +------------------------------------
>  drivers/mmc/host/sdhci-pltfm.c   | 16 +++++++++++++++-
>  drivers/mmc/host/sdhci-sirf.c    | 39 +--------------------------------------
>  3 files changed, 17 insertions(+), 75 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-brcmstb.c b/drivers/mmc/host/sdhci-brcmstb.c
> index e2f638338e8f..6d461fcdd663 100644
> --- a/drivers/mmc/host/sdhci-brcmstb.c
> +++ b/drivers/mmc/host/sdhci-brcmstb.c
> @@ -21,41 +21,6 @@
>  
>  #include "sdhci-pltfm.h"
>  
> -#ifdef CONFIG_PM_SLEEP
> -
> -static int sdhci_brcmstb_suspend(struct device *dev)
> -{
> -	struct sdhci_host *host = dev_get_drvdata(dev);
> -	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> -	int res;
> -
> -	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
> -		mmc_retune_needed(host->mmc);
> -
> -	res = sdhci_suspend_host(host);
> -	if (res)
> -		return res;
> -	clk_disable_unprepare(pltfm_host->clk);
> -	return res;
> -}
> -
> -static int sdhci_brcmstb_resume(struct device *dev)
> -{
> -	struct sdhci_host *host = dev_get_drvdata(dev);
> -	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> -	int err;
> -
> -	err = clk_prepare_enable(pltfm_host->clk);
> -	if (err)
> -		return err;
> -	return sdhci_resume_host(host);
> -}
> -
> -#endif /* CONFIG_PM_SLEEP */
> -
> -static SIMPLE_DEV_PM_OPS(sdhci_brcmstb_pmops, sdhci_brcmstb_suspend,
> -			sdhci_brcmstb_resume);
> -
>  static const struct sdhci_ops sdhci_brcmstb_ops = {
>  	.set_clock = sdhci_set_clock,
>  	.set_bus_width = sdhci_set_bus_width,
> @@ -131,7 +96,7 @@ MODULE_DEVICE_TABLE(of, sdhci_brcm_of_match);
>  static struct platform_driver sdhci_brcmstb_driver = {
>  	.driver		= {
>  		.name	= "sdhci-brcmstb",
> -		.pm	= &sdhci_brcmstb_pmops,
> +		.pm	= &sdhci_pltfm_pmops,
>  		.of_match_table = of_match_ptr(sdhci_brcm_of_match),
>  	},
>  	.probe		= sdhci_brcmstb_probe,
> diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
> index e090d8c42ddb..be9a79d62e22 100644
> --- a/drivers/mmc/host/sdhci-pltfm.c
> +++ b/drivers/mmc/host/sdhci-pltfm.c
> @@ -212,16 +212,30 @@ EXPORT_SYMBOL_GPL(sdhci_pltfm_unregister);
>  static int sdhci_pltfm_suspend(struct device *dev)
>  {
>  	struct sdhci_host *host = dev_get_drvdata(dev);
> +	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> +	int ret;
>  
>  	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
>  		mmc_retune_needed(host->mmc);
>  
> -	return sdhci_suspend_host(host);
> +	ret = sdhci_suspend_host(host);
> +	if (ret)
> +		return ret;
> +
> +	clk_disable_unprepare(pltfm_host->clk);
> +
> +	return 0;
>  }
>  
>  static int sdhci_pltfm_resume(struct device *dev)
>  {
>  	struct sdhci_host *host = dev_get_drvdata(dev);
> +	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> +	int ret;
> +
> +	ret = clk_prepare_enable(pltfm_host->clk);
> +	if (ret)
> +		return ret;
>  
>  	return sdhci_resume_host(host);
>  }
> diff --git a/drivers/mmc/host/sdhci-sirf.c b/drivers/mmc/host/sdhci-sirf.c
> index c251c6c0a112..0c7aa89df4e2 100644
> --- a/drivers/mmc/host/sdhci-sirf.c
> +++ b/drivers/mmc/host/sdhci-sirf.c
> @@ -230,43 +230,6 @@ static int sdhci_sirf_probe(struct platform_device *pdev)
>  	return ret;
>  }
>  
> -#ifdef CONFIG_PM_SLEEP
> -static int sdhci_sirf_suspend(struct device *dev)
> -{
> -	struct sdhci_host *host = dev_get_drvdata(dev);
> -	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> -	int ret;
> -
> -	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
> -		mmc_retune_needed(host->mmc);
> -
> -	ret = sdhci_suspend_host(host);
> -	if (ret)
> -		return ret;
> -
> -	clk_disable(pltfm_host->clk);
> -
> -	return 0;
> -}
> -
> -static int sdhci_sirf_resume(struct device *dev)
> -{
> -	struct sdhci_host *host = dev_get_drvdata(dev);
> -	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> -	int ret;
> -
> -	ret = clk_enable(pltfm_host->clk);
> -	if (ret) {
> -		dev_dbg(dev, "Resume: Error enabling clock\n");
> -		return ret;
> -	}
> -
> -	return sdhci_resume_host(host);
> -}
> -#endif
> -
> -static SIMPLE_DEV_PM_OPS(sdhci_sirf_pm_ops, sdhci_sirf_suspend, sdhci_sirf_resume);
> -
>  static const struct of_device_id sdhci_sirf_of_match[] = {
>  	{ .compatible = "sirf,prima2-sdhc" },
>  	{ }
> @@ -277,7 +240,7 @@ static struct platform_driver sdhci_sirf_driver = {
>  	.driver		= {
>  		.name	= "sdhci-sirf",
>  		.of_match_table = sdhci_sirf_of_match,
> -		.pm	= &sdhci_sirf_pm_ops,
> +		.pm	= &sdhci_pltfm_pmops,
>  	},
>  	.probe		= sdhci_sirf_probe,
>  	.remove		= sdhci_pltfm_unregister,
> 

[PATCH v2 1/4] mmc: sdhci: enable/disable the clock in sdhci_pltfm_suspend/resume

[Adrian Hunter]

On 03/08/17 04:44, Masahiro Yamada wrote:
> This commit provides similar cleanups as commit 83eacdfa2529 ("mmc:
> sdhci: disable the clock in sdhci_pltfm_unregister()") did for
> unregister hooks.
> 
> Some drivers duplicate code to handle pltfm_host->clk in their own
> hooks.  The clock can be handled in sdhci_pltfm.c so that drivers
> can reuse sdhci_pltfm_pmops.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

I would like to see some Acks from other driver maintainers including ones
that did not previously clk_disable_unprepare(pltfm_host->clk) in suspend
but now do. e.g. sdhci-tegra

> ---
> 
> Changes in v2:
>   - Fix build error reported by kbuild test robot
> 
>  drivers/mmc/host/sdhci-brcmstb.c | 37 +------------------------------------
>  drivers/mmc/host/sdhci-pltfm.c   | 16 +++++++++++++++-
>  drivers/mmc/host/sdhci-sirf.c    | 39 +--------------------------------------
>  3 files changed, 17 insertions(+), 75 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-brcmstb.c b/drivers/mmc/host/sdhci-brcmstb.c
> index e2f638338e8f..6d461fcdd663 100644
> --- a/drivers/mmc/host/sdhci-brcmstb.c
> +++ b/drivers/mmc/host/sdhci-brcmstb.c
> @@ -21,41 +21,6 @@
>  
>  #include "sdhci-pltfm.h"
>  
> -#ifdef CONFIG_PM_SLEEP
> -
> -static int sdhci_brcmstb_suspend(struct device *dev)
> -{
> -	struct sdhci_host *host = dev_get_drvdata(dev);
> -	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> -	int res;
> -
> -	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
> -		mmc_retune_needed(host->mmc);
> -
> -	res = sdhci_suspend_host(host);
> -	if (res)
> -		return res;
> -	clk_disable_unprepare(pltfm_host->clk);
> -	return res;
> -}
> -
> -static int sdhci_brcmstb_resume(struct device *dev)
> -{
> -	struct sdhci_host *host = dev_get_drvdata(dev);
> -	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> -	int err;
> -
> -	err = clk_prepare_enable(pltfm_host->clk);
> -	if (err)
> -		return err;
> -	return sdhci_resume_host(host);
> -}
> -
> -#endif /* CONFIG_PM_SLEEP */
> -
> -static SIMPLE_DEV_PM_OPS(sdhci_brcmstb_pmops, sdhci_brcmstb_suspend,
> -			sdhci_brcmstb_resume);
> -
>  static const struct sdhci_ops sdhci_brcmstb_ops = {
>  	.set_clock = sdhci_set_clock,
>  	.set_bus_width = sdhci_set_bus_width,
> @@ -131,7 +96,7 @@ MODULE_DEVICE_TABLE(of, sdhci_brcm_of_match);
>  static struct platform_driver sdhci_brcmstb_driver = {
>  	.driver		= {
>  		.name	= "sdhci-brcmstb",
> -		.pm	= &sdhci_brcmstb_pmops,
> +		.pm	= &sdhci_pltfm_pmops,
>  		.of_match_table = of_match_ptr(sdhci_brcm_of_match),
>  	},
>  	.probe		= sdhci_brcmstb_probe,
> diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
> index e090d8c42ddb..be9a79d62e22 100644
> --- a/drivers/mmc/host/sdhci-pltfm.c
> +++ b/drivers/mmc/host/sdhci-pltfm.c
> @@ -212,16 +212,30 @@ EXPORT_SYMBOL_GPL(sdhci_pltfm_unregister);
>  static int sdhci_pltfm_suspend(struct device *dev)
>  {
>  	struct sdhci_host *host = dev_get_drvdata(dev);
> +	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> +	int ret;
>  
>  	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
>  		mmc_retune_needed(host->mmc);
>  
> -	return sdhci_suspend_host(host);
> +	ret = sdhci_suspend_host(host);
> +	if (ret)
> +		return ret;
> +
> +	clk_disable_unprepare(pltfm_host->clk);
> +
> +	return 0;
>  }
>  
>  static int sdhci_pltfm_resume(struct device *dev)
>  {
>  	struct sdhci_host *host = dev_get_drvdata(dev);
> +	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> +	int ret;
> +
> +	ret = clk_prepare_enable(pltfm_host->clk);
> +	if (ret)
> +		return ret;
>  
>  	return sdhci_resume_host(host);
>  }
> diff --git a/drivers/mmc/host/sdhci-sirf.c b/drivers/mmc/host/sdhci-sirf.c
> index c251c6c0a112..0c7aa89df4e2 100644
> --- a/drivers/mmc/host/sdhci-sirf.c
> +++ b/drivers/mmc/host/sdhci-sirf.c
> @@ -230,43 +230,6 @@ static int sdhci_sirf_probe(struct platform_device *pdev)
>  	return ret;
>  }
>  
> -#ifdef CONFIG_PM_SLEEP
> -static int sdhci_sirf_suspend(struct device *dev)
> -{
> -	struct sdhci_host *host = dev_get_drvdata(dev);
> -	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> -	int ret;
> -
> -	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
> -		mmc_retune_needed(host->mmc);
> -
> -	ret = sdhci_suspend_host(host);
> -	if (ret)
> -		return ret;
> -
> -	clk_disable(pltfm_host->clk);
> -
> -	return 0;
> -}
> -
> -static int sdhci_sirf_resume(struct device *dev)
> -{
> -	struct sdhci_host *host = dev_get_drvdata(dev);
> -	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> -	int ret;
> -
> -	ret = clk_enable(pltfm_host->clk);
> -	if (ret) {
> -		dev_dbg(dev, "Resume: Error enabling clock\n");
> -		return ret;
> -	}
> -
> -	return sdhci_resume_host(host);
> -}
> -#endif
> -
> -static SIMPLE_DEV_PM_OPS(sdhci_sirf_pm_ops, sdhci_sirf_suspend, sdhci_sirf_resume);
> -
>  static const struct of_device_id sdhci_sirf_of_match[] = {
>  	{ .compatible = "sirf,prima2-sdhc" },
>  	{ }
> @@ -277,7 +240,7 @@ static struct platform_driver sdhci_sirf_driver = {
>  	.driver		= {
>  		.name	= "sdhci-sirf",
>  		.of_match_table = sdhci_sirf_of_match,
> -		.pm	= &sdhci_sirf_pm_ops,
> +		.pm	= &sdhci_pltfm_pmops,
>  	},
>  	.probe		= sdhci_sirf_probe,
>  	.remove		= sdhci_pltfm_unregister,
>