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mmc: Kconfig: Add FSL_ESDHC_USE_PERIPHERAL_CLK option

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NXP fsl_esdhc controller supports two reference clocks:
platform clock and peripheral clock
Peripheral clock can provide higher clock frequency
which is required to be used for tuning of SD UHS mode
and eMMC HS200/HS400 modes.

Peripheral clock is enabled by default by defining config
option FSL_ESDHC_USE_PERIPHERAL_CLK if eMMC HS200/HS400 modes
are supported.

Signed-off-by: Yinbo Zhu <yinbo.zhu@nxp.com>
Signed-off-by: Priyanka Jain <priyanka.jain@nxp.com>
This commit is contained in:
Yinbo Zhu 2019-07-16 15:09:07 +08:00 committed by Priyanka Jain
parent 24cb6f2295
commit 29009a507c
1 changed files with 9 additions and 1 deletions
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10
drivers/mmc/Kconfig
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@ -167,7 +167,6 @@ config MMC_HS200_SUPPORT
The HS200 mode is support by some eMMC. The bus frequency is up to
200MHz. This mode requires tuning the IO.
config SPL_MMC_HS200_SUPPORT
bool "enable HS200 support in SPL"
help
@ -695,10 +694,19 @@ endif
config FSL_ESDHC
bool "Freescale/NXP eSDHC controller support"
select FSL_ESDHC_USE_PERIPHERAL_CLK if MMC_HS200_SUPPORT || MMC_UHS_SUPPORT
help
This selects support for the eSDHC (Enhanced Secure Digital Host
Controller) found on numerous Freescale/NXP SoCs.
config FSL_ESDHC_USE_PERIPHERAL_CLK
bool "enable ESDHC peripheral clock support"
depends on FSL_ESDHC
help
eSDHC supports two reference clocks (platform clock and peripheral clock).
Peripheral clock which could provide higher clock frequency is required to
be used for tuning of SD UHS mode and eMMC HS200/HS400 modes.
config FSL_ESDHC_IMX
bool "Freescale/NXP i.MX eSDHC controller support"
help