Hi,
On 10/20/2015 09:05 AM, Shawn Lin wrote:
> This patch adds Generic PHY access for sdhci-of-arasan. Driver
> can get PHY handler from dt-binding, and power-on/init the PHY.
> Also we add pm ops for PHY here if CONFIG_PM_SLEEP is enabled.
> Currently, it's just mandatory for arasan,sdhci-5.1.
>
> Signed-off-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>
>
> Serise-changes: 3
> - remove phy_init/exit for suspend/resume
> - adjust phy_int/power_on seq to make code more reasonable
> - simplify suspend/resume_phy
>
> Serise-changes: 2
> - Keep phy as a mandatory requirement for arasan,sdhci-5.1
>
> ---
>
> Changes in v2: None
>
> drivers/mmc/host/sdhci-of-arasan.c | 87 ++++++++++++++++++++++++++++++++++++++
> 1 file changed, 87 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
> index 75379cb..85bd0f9d 100644
> --- a/drivers/mmc/host/sdhci-of-arasan.c
> +++ b/drivers/mmc/host/sdhci-of-arasan.c
> @@ -21,6 +21,7 @@
>
> #include <linux/module.h>
> #include <linux/of_device.h>
> +#include <linux/phy/phy.h>
> #include "sdhci-pltfm.h"
>
> #define SDHCI_ARASAN_CLK_CTRL_OFFSET 0x2c
> @@ -35,6 +36,7 @@
> */
> struct sdhci_arasan_data {
> struct clk *clk_ahb;
> + struct phy *phy;
> };
>
> static unsigned int sdhci_arasan_get_timeout_clock(struct sdhci_host *host)
> @@ -70,6 +72,42 @@ static struct sdhci_pltfm_data sdhci_arasan_pdata = {
>
> #ifdef CONFIG_PM_SLEEP
> /**
> + * sdhci_arasan_suspend_phy - Suspend phy method for the driver
> + * @phy: Handler of phy structure
> + * Returns 0 on success and error value on error
> + *
> + * Put the phy in a deactive state.
> + */
This is not kernel-doc format.
Try this and fix it.
./scripts/kernel-doc -man -v drivers/mmc/host/sdhci-of-arasan.c > /dev/null
> +static int sdhci_arasan_suspend_phy(struct phy *phy)
> +{
> + int ret = 0;
> +
> + ret = phy_power_off(phy);
> + if (ret)
> + phy_power_on(phy);
I am curious about this logic. If power_off fails I would expect that
phy could still have power_on. Or not?
Thanks,
Michal
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