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[components][drivers][sdio] Fix minor issue in sdio driver (#7904) 

Signed-off-by: Fan YANG <fan.yang@hpmicro.com>
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Fan Yang 2023-08-03 17:10:34 +08:00 committed by GitHub
parent b3831246c2
commit e5c8dd3b05
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1 changed files with 12 additions and 13 deletions
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25
components/drivers/sdio/mmc.c
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@ -307,7 +307,7 @@ out:
} }
/* /*
* Select the bus width amoung 4-bit and 8-bit(SDR). * Select the bus width among 4-bit and 8-bit(SDR).
* If the bus width is changed successfully, return the selected width value. * If the bus width is changed successfully, return the selected width value.
* Zero is returned instead of error value if the wide width is not supported. * Zero is returned instead of error value if the wide width is not supported.
*/ */
@ -337,22 +337,21 @@ static int mmc_select_bus_width(struct rt_mmcsd_card *card, rt_uint8_t *ext_csd)
ddr = 2; ddr = 2;
} }
/* /*
* Unlike SD, MMC cards dont have a configuration register to notify * Unlike SD, MMC cards don't have a configuration register to notify
* supported bus width. So bus test command should be run to identify * supported bus width. So bus test command should be run to identify
* the supported bus width or compare the ext csd values of current * the supported bus width or compare the EXT_CSD values of current
* bus width and ext csd values of 1 bit mode read earlier. * bus width and EXT_CSD values of 1 bit mode read earlier.
*/ */
for (idx = 0; idx < sizeof(bus_widths) / sizeof(rt_uint32_t); idx++) for (idx = 0; idx < sizeof(bus_widths) / sizeof(rt_uint32_t); idx++)
{ {
/* /*
* Host is capable of 8bit transfer, then switch * Determine BUS WIDTH mode according to the capability of host
* the device to work in 8bit transfer mode. If the */
* mmc switch command returns error then switch to if (((ext_csd_bits[idx][0] == EXT_CSD_BUS_WIDTH_8) && ((host->flags & MMCSD_BUSWIDTH_8) == 0)) ||
* 4bit transfer mode. On success set the corresponding ((ext_csd_bits[idx][0] == EXT_CSD_BUS_WIDTH_4) && ((host->flags & MMCSD_BUSWIDTH_4) == 0)))
* bus width on the host. Meanwhile, mmc core would {
* bail out early if corresponding bus capable wasn't continue;
* set by drivers. }
*/
bus_width = bus_widths[idx]; bus_width = bus_widths[idx];
if (bus_width == MMCSD_BUS_WIDTH_1) if (bus_width == MMCSD_BUS_WIDTH_1)
{ {
@ -507,7 +506,7 @@ static int mmc_select_timing(struct rt_mmcsd_card *card)
} }
else else
{ {
mmcsd_set_timing(card->host, MMCSD_TIMING_UHS_SDR50); mmcsd_set_timing(card->host, MMCSD_TIMING_MMC_HS);
mmcsd_set_clock(card->host, card->hs_max_data_rate); mmcsd_set_clock(card->host, card->hs_max_data_rate);
} }