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authorMaxime Ripard <maxime.ripard@free-electrons.com>2017-01-27 22:38:36 +0100
committerUlf Hansson <ulf.hansson@linaro.org>2017-02-13 13:20:50 +0100
commit9a37e53e451eff5790ae15341031e39777105127 (patch)
tree8e733706c8120feb0c7109f8f068186e4938bee0 /drivers/mmc
parent860fdf89b92e740b19d1160406df98e5302a9300 (diff)
downloadlinux-9a37e53e451eff5790ae15341031e39777105127.tar.bz2
mmc: sunxi: Enable the new timings for the A64 MMC controllers
The A64 MMC controllers need to set a "new timings" bit when a new rate is set. The actual meaning of that bit is not clear yet, but not setting it leads to some corner-case issues, like the CMD53 failing, which is used to implement SDIO packet aggregation. 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.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c
index b9c8a62bc212..51d6388a194e 100644
--- a/drivers/mmc/host/sunxi-mmc.c
+++ b/drivers/mmc/host/sunxi-mmc.c
@@ -253,6 +253,8 @@ struct sunxi_mmc_cfg {
/* does the IP block support autocalibration? */
bool can_calibrate;
+
+ bool needs_new_timings;
};
struct sunxi_mmc_host {
@@ -779,6 +781,9 @@ static int sunxi_mmc_clk_set_rate(struct sunxi_mmc_host *host,
}
mmc_writel(host, REG_CLKCR, rval);
+ if (host->cfg->needs_new_timings)
+ mmc_writel(host, REG_SD_NTSR, SDXC_2X_TIMING_MODE);
+
ret = sunxi_mmc_clk_set_phase(host, ios, rate);
if (ret)
return ret;
@@ -1076,6 +1081,7 @@ static const struct sunxi_mmc_cfg sun50i_a64_cfg = {
.idma_des_size_bits = 16,
.clk_delays = NULL,
.can_calibrate = true,
+ .needs_new_timings = true,
};
static const struct of_device_id sunxi_mmc_of_match[] = {