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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>
wifi-calibration
Shinobu Uehara 2014-08-24 20:03:00 -07:00 committed by Ulf Hansson
parent b30d6958a0
commit da29fe2bf5
3 changed files with 14 additions and 2 deletions
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6
drivers/mmc/host/sh_mobile_sdhi.c
View File

@ -49,12 +49,14 @@ static const struct sh_mobile_sdhi_of_data sh_mobile_sdhi_of_cfg[] = {
};
static const struct sh_mobile_sdhi_of_data of_rcar_gen1_compatible = {
.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE,
.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
TMIO_MMC_CLK_ACTUAL,
.capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
};
static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE,
.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
TMIO_MMC_CLK_ACTUAL,
.capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
.capabilities2 = MMC_CAP2_NO_MULTI_READ,
.dma_rx_offset = 0x2000,

5
drivers/mmc/host/tmio_mmc_pio.c
View File

@ -159,6 +159,11 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
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)

5
include/linux/mfd/tmio.h
View File

@ -99,6 +99,11 @@
*/
#define TMIO_MMC_HAVE_CTL_DMA_REG (1 << 9)
/*
* Some controllers allows to set SDx actual clock
*/
#define TMIO_MMC_CLK_ACTUAL (1 << 10)
int tmio_core_mmc_enable(void __iomem *cnf, int shift, unsigned long base);
int tmio_core_mmc_resume(void __iomem *cnf, int shift, unsigned long base);
void tmio_core_mmc_pwr(void __iomem *cnf, int shift, int state);