提交 9a37e53e 编写于 作者: M Maxime Ripard 提交者: Ulf Hansson

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: NMaxime Ripard <maxime.ripard@free-electrons.com>
Tested-by: NFlorian Vaussard <florian.vaussard@heig-vd.ch>
Acked-by: NChen-Yu Tsai <wens@csie.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>
上级 860fdf89
......@@ -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[] = {
......
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