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mmc: sdhci-pci-gli: Reduce power consumption for GL9755

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For GL9755, reduce power consumption by lowering the LFCLK and disabling
the DMACLK on low-power.

Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
Link: https://lore.kernel.org/r/20201123053702.6083-1-benchuanggli@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Ben Chuang 2020-11-23 13:37:02 +08:00 committed by Ulf Hansson
parent b61d468d96
commit 0f1d9961d6
1 changed files with 20 additions and 0 deletions
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20
drivers/mmc/host/sdhci-pci-gli.c
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@ -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);