mmc: Kconfig: Add FSL_ESDHC_USE_PERIPHERAL_CLK option

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>

diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index 8fb2bfa44419f55b4401f9f950ba1dba4766d6d1..7361bcaf8e4ec5a1f284361500f9fbae79d686c9 100644 (file)
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -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