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mmc: tmio/sdhi: introduce flag for RCar 2+ specific features

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RCar Gen2 and later implementations of TMIO/SDHI have their own set of
features and additions. FAST_CLK_CHG is just one of them and I see a few
others being added soon. Some may work on older chipsets but this needs
to be tested case by case. Instead of adding a bunch of flags for each
feature, add a global RCar2+ one for now. We can still break out
features if the need arises.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Wolfram Sang 2016-05-02 22:25:40 +02:00 committed by Ulf Hansson
parent 3072ba8cd9
commit 3d376fb2ea
3 changed files with 7 additions and 7 deletions
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4
drivers/mmc/host/sh_mobile_sdhi.c
View File

@ -62,7 +62,7 @@ static const struct sh_mobile_sdhi_of_data of_rcar_gen1_compatible = {
static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
TMIO_MMC_CLK_ACTUAL | TMIO_MMC_FAST_CLK_CHG,
TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
.capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
.dma_buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES,
.dma_rx_offset = 0x2000,
@ -70,7 +70,7 @@ static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
static const struct sh_mobile_sdhi_of_data of_rcar_gen3_compatible = {
.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
TMIO_MMC_CLK_ACTUAL | TMIO_MMC_FAST_CLK_CHG,
TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
.capabilities = MMC_CAP_SD_HIGHSPEED,
.bus_shift = 2,
};

6
drivers/mmc/host/tmio_mmc_pio.c
View File

@ -157,7 +157,7 @@ static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
{
sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 1 : 10);
msleep(host->pdata->flags & TMIO_MMC_MIN_RCAR2 ? 1 : 10);
if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) {
sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100);
@ -174,7 +174,7 @@ static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 5 : 10);
msleep(host->pdata->flags & TMIO_MMC_MIN_RCAR2 ? 5 : 10);
}
static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
@ -205,7 +205,7 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & CLK_CTL_DIV_MASK);
if (!(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG))
if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2))
msleep(10);
tmio_mmc_clk_start(host);

4
include/linux/mfd/tmio.h
View File

@ -66,8 +66,8 @@
*/
#define TMIO_MMC_SDIO_IRQ (1 << 2)
/* Some controllers don't need to wait 10ms for clock changes */
#define TMIO_MMC_FAST_CLK_CHG (1 << 3)
/* Some features are only available or tested on RCar Gen2 or later */
#define TMIO_MMC_MIN_RCAR2 (1 << 3)
/*
* Some controllers require waiting for the SD bus to become