mmc: tmio: add actual clock support as option
Some controller is supporting actual clock on SD_CLK_CTRL :: DIV[7:0].
Renesas SH-Mobile SDHI doesn't support,
but, Renesas R-Car SDHI supports it.
This patch adds new TMIO_MMC_CLK_ACTUAL flag for it.
[Kuninori Morimoto: tidyuped for upstreaming]
Tested-by: Nguyen Xuan Nui <nx-nui@jinso.co.jp>
Tested-by: Hiep Cao Minh <cm-hiep@jinso.co.jp>
Signed-off-by: Shinobu Uehara <shinobu.uehara.xc@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 7cfe939..ba45413 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -159,6 +159,11 @@
for (clock = host->mmc->f_min, clk = 0x80000080;
new_clock >= (clock<<1); clk >>= 1)
clock <<= 1;
+
+ /* 1/1 clock is option */
+ if ((host->pdata->flags & TMIO_MMC_CLK_ACTUAL) &&
+ ((clk >> 22) & 0x1))
+ clk |= 0xff;
}
if (host->set_clk_div)