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imx233: fix drive strength for sd/mmc

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At high speed, we need a drive strength of 8mA on the clock line
to get stable transfers.

Change-Id: Ida668db10cd3e10ad5740e35fd973f2fa394edb2
This commit is contained in:
Amaury Pouly 2013-08-21 11:11:36 +02:00
parent 462adf2a0f
commit 96d355abba
3 changed files with 47 additions and 40 deletions
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6
firmware/target/arm/imx233/ssp-imx233.h
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@ -98,10 +98,8 @@ enum imx233_ssp_error_t imx233_ssp_sd_mmc_transfer(int ssp, uint8_t cmd,
uint32_t cmd_arg, enum imx233_ssp_resp_t resp, void *buffer, unsigned block_count,
bool wait4irq, bool read, uint32_t *resp_ptr);
/* pullups/alternative are ignored on targets which don't support it */
void imx233_ssp_setup_ssp1_sd_mmc_pins(bool enable_pullups, unsigned bus_width,
unsigned drive_strength, bool use_alt);
void imx233_ssp_setup_ssp2_sd_mmc_pins(bool enable_pullups, unsigned bus_width,
unsigned drive_strength);
void imx233_ssp_setup_ssp1_sd_mmc_pins(bool enable_pullups, unsigned bus_width, bool use_alt);
void imx233_ssp_setup_ssp2_sd_mmc_pins(bool enable_pullups, unsigned bus_width);
/* after callback is fired, imx233_ssp_sdmmc_setup_detect needs to be called
* to enable detection again. If first_time is true, the callback will
* be called if the sd card is inserted when the function is called, otherwise