Hi, Anton,
Could you have any comment about this serial patch?
Thanks
Jerry Huang
> -----Original Message-----
> From: Huang Changming-R66093
> Sent: Friday, January 06, 2012 1:33 PM
> To: linux-mmc@xxxxxxxxxxxxxxx
> Cc: Huang Changming-R66093; Jiang Yutang-B14898; Chris Ball
> Subject: [PATCH 3/5 v4] ESDHC: Power management for ESDHC
>
> From: Jerry Huang <Chang-Ming.Huang@xxxxxxxxxxxxx>
>
> For FSL ESDHC controllor, when enter the sleep, the controller will power
> off,
> therefore the register will lost its valuse, and driver should save value
> of
> register during suspend and used during resume.
>
> Signed-off-by: Jerry Huang <Chang-Ming.Huang@xxxxxxxxxxxxx>
> Signed-off-by: Jiang Yutang <b14898@xxxxxxxxxxxxx>
> CC: Chris Ball <cjb@xxxxxxxxxx>
> ---
> changes for v2:
> - change the property to compatible for quirks
> changes for v3:
> - fix one compile error
> changes for v4:
> - use hooks to suspend/resume the special platform
>
> drivers/mmc/host/sdhci-of-esdhc.c | 19 +++++++++++++++++++
> 1 files changed, 19 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-
> of-esdhc.c
> index c21be67..385a4ff 100644
> --- a/drivers/mmc/host/sdhci-of-esdhc.c
> +++ b/drivers/mmc/host/sdhci-of-esdhc.c
> @@ -104,6 +104,21 @@ static int esdhc_of_get_cd(struct sdhci_host *host)
> return present;
> }
>
> +#ifdef CONFIG_PM
> +static u32 esdhc_proctl;
> +static void esdhc_of_suspend(struct sdhci_host *host)
> +{
> + esdhc_proctl = sdhci_be32bs_readl(host, SDHCI_HOST_CONTROL);
> +}
> +
> +static void esdhc_of_resume(struct sdhci_host *host)
> +{
> + esdhc_of_enable_dma(host);
> + sdhci_be32bs_writel(host, esdhc_proctl, SDHCI_HOST_CONTROL);
> +
> +}
> +#endif
> +
> static struct sdhci_ops sdhci_esdhc_ops = {
> .read_l = sdhci_be32bs_readl,
> .read_w = esdhc_readw,
> @@ -116,6 +131,10 @@ static struct sdhci_ops sdhci_esdhc_ops = {
> .get_max_clock = esdhc_of_get_max_clock,
> .get_min_clock = esdhc_of_get_min_clock,
> .get_cd = esdhc_of_get_cd,
> +#ifdef CONFIG_PM
> + .platform_suspend = esdhc_of_suspend,
> + .platform_resume = esdhc_of_resume,
> +#endif
> };
>
> static struct sdhci_pltfm_data sdhci_esdhc_pdata = {
> --
> 1.7.5.4
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