| Message ID | 20200626020624.31588-1-s-tokumoto@fujitsu.com |
|---|---|
| State | New |
| Headers | show |
| Series | mmc: Parse new binding for eMMC fixed driver type | expand |
> From: Peng Fan <peng.fan@nxp.com> > Sent: Tuesday, July 14, 2020 4:52 PM > To: Tokumoto, Shunsuke/徳本 俊介 <s-tokumoto@fujitsu.com> > Cc: u-boot@lists.denx.de; Iida, Yasushi/飯田 康志 > <yasushi.iida@fujitsu.com> > Subject: RE: [PATCH] mmc: Parse new binding for eMMC fixed driver type > > > Subject: [PATCH] mmc: Parse new binding for eMMC fixed driver type > > > > Parse the new binding and store it in the mmc config struct after > > doing some sanity checks. The code is designed to support fixed mmc > > driver type if we ever need that. > > > > Signed-off-by: Shunsuke Tokumoto <s-tokumoto@fujitsu.com> > > Signed-off-by: Yasushi Iida <yasushi.iida@fujitsu.com> > > --- > > drivers/mmc/mmc-uclass.c | 30 > ++++++++++++++++++++++++++++++ > > drivers/mmc/mmc.c | 8 ++++++++ > > include/mmc.h | 3 +++ > > 3 files changed, 41 insertions(+) > > > > diff --git a/drivers/mmc/mmc-uclass.c b/drivers/mmc/mmc-uclass.c > index > > c5b7872900..e67aae451f 100644 > > --- a/drivers/mmc/mmc-uclass.c > > +++ b/drivers/mmc/mmc-uclass.c > > @@ -162,6 +162,36 @@ int dm_mmc_deferred_probe(struct udevice *dev) > > if (ops->deferred_probe) > > return ops->deferred_probe(dev); > > > > + /* Check eMMC driver type selection */ > > + val = dev_read_u32_default(dev, "fixed-emmc-driver-type", 0); > > Has the bindings been accepted by Linux Kernel? > The bindings "fixed-emmc-driver-type" has already included in the Linux Kernel. The others, "fixed-emmc-driver-type-hs200" and "fixed-emmc-driver-type-hs400" are not included in the Linux Kernel. > Regards, > Peng. Best regards Shunsuke
diff --git a/drivers/mmc/mmc-uclass.c b/drivers/mmc/mmc-uclass.c index c5b7872900..e67aae451f 100644 --- a/drivers/mmc/mmc-uclass.c +++ b/drivers/mmc/mmc-uclass.c @@ -162,6 +162,36 @@ int dm_mmc_deferred_probe(struct udevice *dev) if (ops->deferred_probe) return ops->deferred_probe(dev); + /* Check eMMC driver type selection */ + val = dev_read_u32_default(dev, "fixed-emmc-driver-type", 0); + if (val > 4) { + puts("\"fixed-emmc-driver-type\" is illegal. force to 0.\n"); + val = 0; + } + cfg->driver_type = val; + + val = dev_read_u32_default(dev, + "fixed-emmc-driver-type-hs200", + -ENOENT); + if (val != -ENOENT) { + if (val > 4) { + puts("\"fixed-emmc-driver-type-hs200\" is illegal.\n"); + val = 0; + } + } + cfg->driver_type_hs200 = val; + + val = dev_read_u32_default(dev, + "fixed-emmc-driver-type-hs400", + -ENOENT); + if (val != -ENOENT) { + if (val > 4) { + puts("\"fixed-emmc-driver-type-hs400\" is illegal.\n"); + val = 0; + } + } + cfg->driver_type_hs400 = val; + return 0; } diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 620bb93064..8241be9996 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -849,11 +849,19 @@ static int mmc_set_card_speed(struct mmc *mmc, enum bus_mode mode, #if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) case MMC_HS_200: speed_bits = EXT_CSD_TIMING_HS200; + if (mmc->cfg->driver_type_hs200 != -ENOENT) + speed_bits |= (mmc->cfg->driver_type_hs200 << 4); + else + speed_bits |= (mmc->cfg->driver_type << 4); break; #endif #if CONFIG_IS_ENABLED(MMC_HS400_SUPPORT) case MMC_HS_400: speed_bits = EXT_CSD_TIMING_HS400; + if (mmc->cfg->driver_type_hs400 != -ENOENT) + speed_bits |= (mmc->cfg->driver_type_hs400 << 4); + else + speed_bits |= (mmc->cfg->driver_type << 4); break; #endif #if CONFIG_IS_ENABLED(MMC_HS400_ES_SUPPORT) diff --git a/include/mmc.h b/include/mmc.h index 82562193cc..8d79ff5cbe 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -555,6 +555,9 @@ struct mmc_config { uint f_max; uint b_max; unsigned char part_type; + uint driver_type; + uint driver_type_hs200; + uint driver_type_hs400; }; struct sd_ssr {