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authorUlf Hansson <ulf.hansson@linaro.org>2015-02-02 16:01:14 +0100
committerUlf Hansson <ulf.hansson@linaro.org>2015-02-03 20:56:58 +0100
commit4febb7e20aa619e2b2845519dad247e4038dc383 (patch)
treec98ab6f6019166c839ec51165083656c964bf8cd /drivers/mmc
parentc13045b1e939a9ecffab4a8f8d514e8a2a0bd2c9 (diff)
downloadkernel-4febb7e20aa619e2b2845519dad247e4038dc383.tar.gz
mmc: core: Invoke mmc_pwrseq_post_power_on() prior MMC_POWER_ON state
Host drivers have different ways to sends their "init stream" to the card. Some need to do it as part of a request, some do it from the ->set_ios() callback in the MMC_POWER_ON state and some don't send an "init stream" at all. To be able to use the reset GPIOs from the simple MMC power sequence provider, the card need to be powered and the "init stream" must not have been sent. To cope with these requirements, invoke mmc_pwrseq_post_power_on() prior we change the state to MMC_POWER_ON in mmc_power_up(). Host drivers shall perform power up operations in the MMC_POWER_UP state. Unfortunate three hosts (au1xmmc, cb710-mmc and toshsd) don't conform to this expectation. Instead those ignore the MMC_POWER_UP state and delays their power up operations to the MMC_POWER_ON state. Those hosts needs to change their behavior to enable proper support for the simple MMC power sequence provider. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk> Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/core/core.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 0dc64e6e00d4..23f10f72e5f3 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1637,6 +1637,8 @@ void mmc_power_up(struct mmc_host *host, u32 ocr)
*/
mmc_delay(10);
+ mmc_pwrseq_post_power_on(host);
+
host->ios.clock = host->f_init;
host->ios.power_mode = MMC_POWER_ON;
@@ -1648,8 +1650,6 @@ void mmc_power_up(struct mmc_host *host, u32 ocr)
*/
mmc_delay(10);
- mmc_pwrseq_post_power_on(host);
-
mmc_host_clk_release(host);
}