Hello Ulf, On Mon, Jan 19, 2015 at 10:13 AM, Ulf Hansson <ulf.hansson@xxxxxxxxxx> wrote: > System on chip designs may specify a specific MMC power sequence. To > successfully detect an (e)MMC/SD/SDIO card, that power sequence must > be followed while initializing the card. > > To be able to handle these SOC specific power sequences, let's add a > MMC power sequence interface. It provides the following functions to > help the mmc core to deal with these power sequences. > > mmc_pwrseq_alloc() - Invoked from mmc_of_parse(), to initialize data. > mmc_pwrseq_pre_power_on()- Invoked in the beginning of mmc_power_up(). > mmc_pwrseq_post_power_on()- Invoked at the end in mmc_power_up(). > mmc_pwrseq_power_off()- Invoked from mmc_power_off(). > mmc_pwrseq_free() - Invoked from mmc_free_host(), to free data. > > Each MMC power sequence provider will be responsible to implement a set > of callbacks. These callbacks mirrors the functions above. > > This patch adds the skeleton, following patches will extend the core of > the MMC power sequence and add support for a specific simple MMC power > sequence. > > Do note, since the mmc_pwrseq_alloc() is invoked from mmc_of_parse(), > host drivers needs to make use of this API to enable the support for > MMC power sequences. Moreover the MMC power sequence support depends on > CONFIG_OF. > > Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> > --- Patch looks good to me and I could successfully get the SDIO wlan chip in the Snow Chromebook after extending the pwrseq_simple driver so on Exynos5250 Snow Chromebook: Tested-by: Javier Martinez Canillas <javier.martinez@xxxxxxxxxxxxxxx> Reviewed-by: Javier Martinez Canillas <javier.martinez@xxxxxxxxxxxxxxx> Best regards, Javier -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
