diff options
| author | Shawn Lin <shawn.lin@rock-chips.com> | 2026-03-17 08:04:52 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-03-19 16:08:49 +0100 |
| commit | 5b58ba042e2379f4c01da3211fd17dbdc983c2ac (patch) | |
| tree | c640c3cb3e56d53c1e63942111030df416b5702f | |
| parent | 4c3a860b96e720e3823b3ccbf3fe04a0e3926051 (diff) | |
mmc: dw_mmc-rockchip: Add memory clock auto-gating support
[ Upstream commit ff6f0286c896f062853552097220dd93961be9c4 ]
Per design recommendations, the memory clock can be gated when there
is no in-flight transfer, which helps save power. This feature is
introduced alongside internal phase support, and this patch enables it.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Stable-dep-of: 6465a8bbb0f6 ("mmc: dw_mmc-rockchip: Fix runtime PM support for internal phase support")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/mmc/host/dw_mmc-rockchip.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/mmc/host/dw_mmc-rockchip.c b/drivers/mmc/host/dw_mmc-rockchip.c index 681354942e97..62c68cda1e21 100644 --- a/drivers/mmc/host/dw_mmc-rockchip.c +++ b/drivers/mmc/host/dw_mmc-rockchip.c @@ -19,6 +19,8 @@ #define RK3288_CLKGEN_DIV 2 #define SDMMC_TIMING_CON0 0x130 #define SDMMC_TIMING_CON1 0x134 +#define SDMMC_MISC_CON 0x138 +#define MEM_CLK_AUTOGATE_ENABLE BIT(5) #define ROCKCHIP_MMC_DELAY_SEL BIT(10) #define ROCKCHIP_MMC_DEGREE_MASK 0x3 #define ROCKCHIP_MMC_DEGREE_OFFSET 1 @@ -470,6 +472,7 @@ static int dw_mci_rk3576_parse_dt(struct dw_mci *host) static int dw_mci_rockchip_init(struct dw_mci *host) { + struct dw_mci_rockchip_priv_data *priv = host->priv; int ret, i; /* It is slot 8 on Rockchip SoCs */ @@ -494,6 +497,9 @@ static int dw_mci_rockchip_init(struct dw_mci *host) dev_warn(host->dev, "no valid minimum freq: %d\n", ret); } + if (priv->internal_phase) + mci_writel(host, MISC_CON, MEM_CLK_AUTOGATE_ENABLE); + return 0; } |