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MX28: m28evk: Align SSP clock speed

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Align the SSP clock speed with oscilator to achieve
higher transfer stability.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Marek Vasut 2012-08-21 16:17:28 +00:00 • committed by Albert ARIBAUD
parent 2c4321444a
commit 1d6d5f9674
2 changed files with 4 additions and 4 deletions
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4
board/denx/m28evk/m28evk.c
View file

@ -49,8 +49,8 @@ int board_early_init_f(void)
/* SSP0 clock at 96MHz */ /* SSP0 clock at 96MHz */
mx28_set_sspclk(MXC_SSPCLK0, 96000, 0); mx28_set_sspclk(MXC_SSPCLK0, 96000, 0);
/* SSP2 clock at 96MHz */ /* SSP2 clock at 160MHz */
mx28_set_sspclk(MXC_SSPCLK2, 96000, 0); mx28_set_sspclk(MXC_SSPCLK2, 160000, 0);
#ifdef CONFIG_CMD_USB #ifdef CONFIG_CMD_USB
mxs_iomux_setup_pad(MX28_PAD_SSP2_SS1__USB1_OVERCURRENT); mxs_iomux_setup_pad(MX28_PAD_SSP2_SS1__USB1_OVERCURRENT);

4
include/configs/m28evk.h
View file

@ -253,11 +253,11 @@
#define CONFIG_SPI_FLASH_STMICRO #define CONFIG_SPI_FLASH_STMICRO
#define CONFIG_SF_DEFAULT_CS 2 #define CONFIG_SF_DEFAULT_CS 2
#define CONFIG_SF_DEFAULT_MODE SPI_MODE_0 #define CONFIG_SF_DEFAULT_MODE SPI_MODE_0
#define CONFIG_SF_DEFAULT_SPEED 24000000 #define CONFIG_SF_DEFAULT_SPEED 40000000
#define CONFIG_ENV_SPI_CS 0 #define CONFIG_ENV_SPI_CS 0
#define CONFIG_ENV_SPI_BUS 2 #define CONFIG_ENV_SPI_BUS 2
#define CONFIG_ENV_SPI_MAX_HZ 24000000 #define CONFIG_ENV_SPI_MAX_HZ 40000000
#define CONFIG_ENV_SPI_MODE SPI_MODE_0 #define CONFIG_ENV_SPI_MODE SPI_MODE_0
#endif #endif
#endif #endif