diff options
| author | Maxime Ripard <maxime.ripard@free-electrons.com> | 2017-01-27 22:38:34 +0100 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-02-13 13:20:49 +0100 |
| commit | 9479074e93765a65ee352e74bb66ff3f5ec03413 (patch) | |
| tree | 55c14ca4d0b814da6cc6c67f79980a1b0b6ec368 /drivers/mmc | |
| parent | 39cc281fb79e3d40e945577363a55f5c922353ad (diff) | |
| download | linux-9479074e93765a65ee352e74bb66ff3f5ec03413.tar.gz linux-9479074e93765a65ee352e74bb66ff3f5ec03413.tar.xz | |
mmc: sunxi: Gate the clock when rate is 0
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 <maxime.ripard@free-electrons.com>
Tested-by: Florian Vaussard <florian.vaussard@heig-vd.ch>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sunxi-mmc.c | 5 |
1 files changed, 4 insertions, 1 deletions
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 */ } |