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path: root/drivers/mmc/core/sd.c
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Diffstat (limited to 'drivers/mmc/core/sd.c')
-rw-r--r--drivers/mmc/core/sd.c33
1 files changed, 13 insertions, 20 deletions
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 8f6864a2a055..5edd7d8b033e 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -388,18 +388,9 @@ static int sd_select_driver_type(struct mmc_card *card, u8 *status)
{
int host_drv_type = SD_DRIVER_TYPE_B;
int card_drv_type = SD_DRIVER_TYPE_B;
- int drive_strength;
+ int drive_strength, drv_type;
int err;
- /*
- * If the host doesn't support any of the Driver Types A,C or D,
- * or there is no board specific handler then default Driver
- * Type B is used.
- */
- if (!(card->host->caps & (MMC_CAP_DRIVER_TYPE_A | MMC_CAP_DRIVER_TYPE_C
- | MMC_CAP_DRIVER_TYPE_D)))
- return 0;
-
if (!card->host->ops->select_drive_strength)
return 0;
@@ -430,20 +421,22 @@ static int sd_select_driver_type(struct mmc_card *card, u8 *status)
mmc_host_clk_hold(card->host);
drive_strength = card->host->ops->select_drive_strength(
card->sw_caps.uhs_max_dtr,
- host_drv_type, card_drv_type);
+ host_drv_type, card_drv_type, &drv_type);
mmc_host_clk_release(card->host);
- err = mmc_sd_switch(card, 1, 2, drive_strength, status);
- if (err)
- return err;
-
- if ((status[15] & 0xF) != drive_strength) {
- pr_warn("%s: Problem setting drive strength!\n",
- mmc_hostname(card->host));
- return 0;
+ if (drive_strength) {
+ err = mmc_sd_switch(card, 1, 2, drive_strength, status);
+ if (err)
+ return err;
+ if ((status[15] & 0xF) != drive_strength) {
+ pr_warn("%s: Problem setting drive strength!\n",
+ mmc_hostname(card->host));
+ return 0;
+ }
}
- mmc_set_driver_type(card->host, drive_strength);
+ if (drv_type)
+ mmc_set_driver_type(card->host, drv_type);
return 0;
}