diff options
| author |   Wolfram Sang <wsa+renesas@sang-engineering.com> | 2017-10-15 14:46:14 +0200 |
|---|---|---|
| committer |   Ulf Hansson <ulf.hansson@linaro.org> | 2017-10-30 11:50:38 +0100 |
| commit | 6186d06c519e217351fac95b545f334f8582af90 (patch) | |
| tree | 6f33649e4f1f833bf3639a5794480f7d797bdf68 /drivers/mmc | |
| parent | dt-bindings: mmc: describe new eMMC binding for fixed driver type (diff) | |
| download | linux-dev-6186d06c519e217351fac95b545f334f8582af90.tar.xz linux-dev-6186d06c519e217351fac95b545f334f8582af90.zip | |
mmc: parse new binding for eMMC fixed driver type
Parse the new binding and store it in the host struct after doing some
sanity checks. The code is designed to support fixed SD driver type if
we ever need that.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/core/host.c | 13 | ||||
| -rw-r--r-- | drivers/mmc/core/mmc.c | 11 |
2 files changed, 20 insertions, 4 deletions
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index e58be39b1568..35a9e4fd1a9f 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -179,7 +179,7 @@ static void mmc_retune_timer(unsigned long data) int mmc_of_parse(struct mmc_host *host) { struct device *dev = host->parent; - u32 bus_width; + u32 bus_width, drv_type; int ret; bool cd_cap_invert, cd_gpio_invert = false; bool ro_cap_invert, ro_gpio_invert = false; @@ -321,6 +321,15 @@ int mmc_of_parse(struct mmc_host *host) if (device_property_read_bool(dev, "no-mmc")) host->caps2 |= MMC_CAP2_NO_MMC; + /* Must be after "non-removable" check */ + if (device_property_read_u32(dev, "fixed-emmc-driver-type", &drv_type) == 0) { + if (host->caps & MMC_CAP_NONREMOVABLE) + host->fixed_drv_type = drv_type; + else + dev_err(host->parent, + "can't use fixed driver type, media is removable\n"); + } + host->dsr_req = !device_property_read_u32(dev, "dsr", &host->dsr); if (host->dsr_req && (host->dsr & ~0xffff)) { dev_err(host->parent, @@ -393,6 +402,8 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev) host->max_blk_size = 512; host->max_blk_count = PAGE_SIZE / 512; + host->fixed_drv_type = -EINVAL; + return host; } diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 066efbb89483..a552f61060d2 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -1291,13 +1291,18 @@ out_err: static void mmc_select_driver_type(struct mmc_card *card) { int card_drv_type, drive_strength, drv_type; + int fixed_drv_type = card->host->fixed_drv_type; card_drv_type = card->ext_csd.raw_driver_strength | mmc_driver_type_mask(0); - drive_strength = mmc_select_drive_strength(card, - card->ext_csd.hs200_max_dtr, - card_drv_type, &drv_type); + if (fixed_drv_type >= 0) + drive_strength = card_drv_type & mmc_driver_type_mask(fixed_drv_type) + ? fixed_drv_type : 0; + else + drive_strength = mmc_select_drive_strength(card, + card->ext_csd.hs200_max_dtr, + card_drv_type, &drv_type); card->drive_strength = drive_strength; |