linux-kernel - Re: [PATCH 2/3] mmc: sdhci-pci-gli: Enable SSC at 50MHz and 100MHz for GL9750 and GL9755

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Message-ID: <CAPDyKFr6CPS6uAnZc_CdCSg2iWGvZXSmoO4+cHTo6eEyfXnQDg@mail.gmail.com>
Date:   Mon, 24 Jan 2022 15:41:16 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Ben Chuang <benchuanggli@...il.com>
Cc:     adrian.hunter@...el.com, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org, greg.tu@...esyslogic.com.tw,
        ben.chuang@...esyslogic.com.tw, SeanHY.Chen@...esyslogic.com.tw
Subject: Re: [PATCH 2/3] mmc: sdhci-pci-gli: Enable SSC at 50MHz and 100MHz
 for GL9750 and GL9755

On Wed, 19 Jan 2022 at 08:53, Ben Chuang <benchuanggli@...il.com> wrote:
>
> From: Ben Chuang <ben.chuang@...esyslogic.com.tw>
>
> Enable SSC function at 50MHz and 100MHz for GL9750 and GL9755.
>
> Signed-off-by: Ben Chuang <ben.chuang@...esyslogic.com.tw>

Applied for next, thanks!

Kind regards
Uffe


> ---
>  drivers/mmc/host/sdhci-pci-gli.c | 36 ++++++++++++++++++++++++++++++++
>  1 file changed, 36 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
> index 9ead32d73447..9de3d91283af 100644
> --- a/drivers/mmc/host/sdhci-pci-gli.c
> +++ b/drivers/mmc/host/sdhci-pci-gli.c
> @@ -394,6 +394,20 @@ static void gl9750_set_ssc_pll_205mhz(struct sdhci_host *host)
>         gl9750_set_pll(host, 0x1, 0x246, 0x0);
>  }
>
> +static void gl9750_set_ssc_pll_100mhz(struct sdhci_host *host)
> +{
> +       /* set pll to 100MHz and enable ssc */
> +       gl9750_set_ssc(host, 0x1, 0xE, 0x51EC);
> +       gl9750_set_pll(host, 0x1, 0x244, 0x1);
> +}
> +
> +static void gl9750_set_ssc_pll_50mhz(struct sdhci_host *host)
> +{
> +       /* set pll to 50MHz and enable ssc */
> +       gl9750_set_ssc(host, 0x1, 0xE, 0x51EC);
> +       gl9750_set_pll(host, 0x1, 0x244, 0x3);
> +}
> +
>  static void sdhci_gl9750_set_clock(struct sdhci_host *host, unsigned int clock)
>  {
>         struct mmc_ios *ios = &host->mmc->ios;
> @@ -411,6 +425,10 @@ static void sdhci_gl9750_set_clock(struct sdhci_host *host, unsigned int clock)
>         if (clock == 200000000 && ios->timing == MMC_TIMING_UHS_SDR104) {
>                 host->mmc->actual_clock = 205000000;
>                 gl9750_set_ssc_pll_205mhz(host);
> +       } else if (clock == 100000000) {
> +               gl9750_set_ssc_pll_100mhz(host);
> +       } else if (clock == 50000000) {
> +               gl9750_set_ssc_pll_50mhz(host);
>         }
>
>         sdhci_enable_clk(host, clk);
> @@ -537,6 +555,20 @@ static void gl9755_set_ssc_pll_205mhz(struct pci_dev *pdev)
>         gl9755_set_pll(pdev, 0x1, 0x246, 0x0);
>  }
>
> +static void gl9755_set_ssc_pll_100mhz(struct pci_dev *pdev)
> +{
> +       /* set pll to 100MHz and enable ssc */
> +       gl9755_set_ssc(pdev, 0x1, 0xE, 0x51EC);
> +       gl9755_set_pll(pdev, 0x1, 0x244, 0x1);
> +}
> +
> +static void gl9755_set_ssc_pll_50mhz(struct pci_dev *pdev)
> +{
> +       /* set pll to 50MHz and enable ssc */
> +       gl9755_set_ssc(pdev, 0x1, 0xE, 0x51EC);
> +       gl9755_set_pll(pdev, 0x1, 0x244, 0x3);
> +}
> +
>  static void sdhci_gl9755_set_clock(struct sdhci_host *host, unsigned int clock)
>  {
>         struct sdhci_pci_slot *slot = sdhci_priv(host);
> @@ -557,6 +589,10 @@ static void sdhci_gl9755_set_clock(struct sdhci_host *host, unsigned int clock)
>         if (clock == 200000000 && ios->timing == MMC_TIMING_UHS_SDR104) {
>                 host->mmc->actual_clock = 205000000;
>                 gl9755_set_ssc_pll_205mhz(pdev);
> +       } else if (clock == 100000000) {
> +               gl9755_set_ssc_pll_100mhz(pdev);
> +       } else if (clock == 50000000) {
> +               gl9755_set_ssc_pll_50mhz(pdev);
>         }
>
>         sdhci_enable_clk(host, clk);
> --
> 2.34.1
>