On Mon, 23 Nov 2020 at 06:38, Ben Chuang <benchuanggli@xxxxxxxxx> wrote:
>
> From: Ben Chuang <ben.chuang@xxxxxxxxxxxxxxxxxxx>
>
> For GL9755, reduce power consumption by lowering the LFCLK and disabling
> the DMACLK on low-power.
>
> Signed-off-by: Ben Chuang <ben.chuang@xxxxxxxxxxxxxxxxxxx>
Applied for next, thanks!
Kind regards
Uffe
> ---
> drivers/mmc/host/sdhci-pci-gli.c | 20 ++++++++++++++++++++
> 1 file changed, 20 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
> index 9887485a4134..f10bdfbfce36 100644
> --- a/drivers/mmc/host/sdhci-pci-gli.c
> +++ b/drivers/mmc/host/sdhci-pci-gli.c
> @@ -97,6 +97,10 @@
> #define GLI_9755_WT_EN_ON 0x1
> #define GLI_9755_WT_EN_OFF 0x0
>
> +#define PCI_GLI_9755_PECONF 0x44
> +#define PCI_GLI_9755_LFCLK GENMASK(14, 12)
> +#define PCI_GLI_9755_DMACLK BIT(29)
> +
> #define PCI_GLI_9755_PLL 0x64
> #define PCI_GLI_9755_PLL_LDIV GENMASK(9, 0)
> #define PCI_GLI_9755_PLL_PDIV GENMASK(14, 12)
> @@ -519,6 +523,21 @@ static void sdhci_gl9755_set_clock(struct sdhci_host *host, unsigned int clock)
> sdhci_enable_clk(host, clk);
> }
>
> +static void gl9755_hw_setting(struct sdhci_pci_slot *slot)
> +{
> + struct pci_dev *pdev = slot->chip->pdev;
> + u32 value;
> +
> + gl9755_wt_on(pdev);
> +
> + pci_read_config_dword(pdev, PCI_GLI_9755_PECONF, &value);
> + value &= ~PCI_GLI_9755_LFCLK;
> + value &= ~PCI_GLI_9755_DMACLK;
> + pci_write_config_dword(pdev, PCI_GLI_9755_PECONF, value);
> +
> + gl9755_wt_off(pdev);
> +}
> +
> static int gli_probe_slot_gl9750(struct sdhci_pci_slot *slot)
> {
> struct sdhci_host *host = slot->host;
> @@ -534,6 +553,7 @@ static int gli_probe_slot_gl9755(struct sdhci_pci_slot *slot)
> {
> struct sdhci_host *host = slot->host;
>
> + gl9755_hw_setting(slot);
> gli_pcie_enable_msi(slot);
> slot->host->mmc->caps2 |= MMC_CAP2_NO_SDIO;
> sdhci_enable_v4_mode(host);
> --
> 2.29.2
>
