[PATCH v3 2/13] mmc: sunxi: Gate the clock when rate is 0
From: Ulf Hansson <hidden>
Date: 2017-01-24 08:14:40
Also in:
linux-devicetree, linux-mmc, lkml
On 16 January 2017 at 17:56, Maxime Ripard [off-list ref] wrote:
The MMC core assumes that the code will gate the clock when the bus frequency is set to 0, which we've been ignoring so far. Handle that. Signed-off-by: Maxime Ripard <redacted>
Looks good! Kind regards Uffe
quoted hunk ↗ jump to hunk
--- drivers/mmc/host/sunxi-mmc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c index ab4324e6eb74..019f95e8e7c5 100644 --- a/drivers/mmc/host/sunxi-mmc.c +++ b/drivers/mmc/host/sunxi-mmc.c@@ -765,6 +765,9 @@ static int sunxi_mmc_clk_set_rate(struct sunxi_mmc_host *host, if (ret) return ret; + if (!ios->clock) + return 0; + /* 8 bit DDR requires a higher module clock */ if (ios->timing == MMC_TIMING_MMC_DDR52 && ios->bus_width == MMC_BUS_WIDTH_8)@@ -882,7 +885,7 @@ static void sunxi_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) mmc_writel(host, REG_GCTRL, rval); /* set up clock */ - if (ios->clock && ios->power_mode) { + if (ios->power_mode) { host->ferror = sunxi_mmc_clk_set_rate(host, ios); /* Android code had a usleep_range(50000, 55000); here */ } --git-series 0.8.11