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MLK-12102 mmc: fsl: introduce wp_enable

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Introudce wp_enable. If want to check WPSPL, then in board code,
need to set wp_enable to 1.

Take i.MX6UL for example, to some boards, they do not use WP singal,
so they does not configure USDHC1_WP_SELECT_INPUT, and its default
value is 0(GPIO1_IO02). However GPIO1_IO02 is muxed for i2c usage and
SION bit set. So USDHC controller can always get wp signal and WPSPL
shows write protect and blocks driver continuing. This is not what
we want to see, so add wp_enable, and if set to 0, just omit the
WPSPL checking and this does not effect normal working of usdhc
controller.

Suggested-by: Ye.Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
(cherry picked from commit 327dad065f6f9a2b29bd646efc7a08a4c01a4ad3)
This commit is contained in:
Peng Fan
2015-12-30 17:04:16 +08:00
committed by Ye Li
parent 279e0bee72
commit b7724cb4a3
2 changed files with 7 additions and 3 deletions
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9
drivers/mmc/fsl_esdhc.c
View File

@ -221,9 +221,12 @@ static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
#endif
if (wml_value > WML_WR_WML_MAX)
wml_value = WML_WR_WML_MAX_VAL;
if ((esdhc_read32(&regs->prsstat) & PRSSTAT_WPSPL) == 0) {
printf("\nThe SD card is locked. Can not write to a locked card.\n\n");
return TIMEOUT;
if (cfg->wp_enable) {
if ((esdhc_read32(&regs->prsstat) & PRSSTAT_WPSPL) == 0) {
printf("\nThe SD card is locked. Can not write to a locked card.\n\n");
return TIMEOUT;
}
}
esdhc_clrsetbits32(&regs->wml, WML_WR_WML_MASK,

1
include/fsl_esdhc.h
View File

@ -181,6 +181,7 @@ struct fsl_esdhc_cfg {
#endif
u32 sdhc_clk;
u8 max_bus_width;
u8 wp_enable;
struct mmc_config cfg;
};