diff options
| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2016-01-19 12:28:31 +0100 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-02-29 11:03:04 +0100 |
| commit | 04e24b80a3ddf4cdf85e49a99d33aec27c9432ad (patch) | |
| tree | bfb3997e7f5a191afac8a54101c4468c9cfc65fa /drivers/mmc/host | |
| parent | mmc: sdhi: error message on ENOMEM is superfluous (diff) | |
| download | linux-04e24b80a3ddf4cdf85e49a99d33aec27c9432ad.tar.xz linux-04e24b80a3ddf4cdf85e49a99d33aec27c9432ad.zip | |
mmc: tmio: add flag to reduce delay after changing clock status
The docs for RCar Gen2 & 3 I have access to, mention delays of 5ms after
stop and 1ms after start. Make it possible to apply these values.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host')
| -rw-r--r-- | drivers/mmc/host/tmio_mmc_pio.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c index a10fde40b6c3..ffff687e98b1 100644 --- a/drivers/mmc/host/tmio_mmc_pio.c +++ b/drivers/mmc/host/tmio_mmc_pio.c @@ -172,7 +172,8 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host, host->set_clk_div(host->pdev, (clk>>22) & 1); sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & 0x1ff); - msleep(10); + if (!(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG)) + msleep(10); } static void tmio_mmc_clk_stop(struct tmio_mmc_host *host) @@ -185,14 +186,14 @@ static void tmio_mmc_clk_stop(struct tmio_mmc_host *host) sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~0x0100 & sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); - msleep(10); + msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 5 : 10); } static void tmio_mmc_clk_start(struct tmio_mmc_host *host) { sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, 0x0100 | sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); - msleep(10); + msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 1 : 10); /* implicit BUG_ON(!res) */ if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) { |