There are host drivers which needs to valdiate for non-supported SD
commands and returnn error code for such requests.
To improve and simplify the behaviour, let's invent MMC_CAP2_NO_SD
which these host drivers can set to tell the mmc core to skip sending SD
commands during card initialization.
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
---
drivers/mmc/core/core.c | 9 ++++++---
include/linux/mmc/host.h | 1 +
2 files changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index e864187..8b11028 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2500,15 +2500,18 @@ static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
mmc_go_idle(host);
- mmc_send_if_cond(host, host->ocr_avail);
+ if (!(host->caps2 & MMC_CAP2_NO_SD))
+ mmc_send_if_cond(host, host->ocr_avail);
/* Order's important: probe SDIO, then SD, then MMC */
if (!(host->caps2 & MMC_CAP2_NO_SDIO))
if (!mmc_attach_sdio(host))
return 0;
- if (!mmc_attach_sd(host))
- return 0;
+ if (!(host->caps2 & MMC_CAP2_NO_SD))
+ if (!mmc_attach_sd(host))
+ return 0;
+
if (!mmc_attach_mmc(host))
return 0;
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index d72c0c3..c22476d 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -309,6 +309,7 @@ struct mmc_host {
#define MMC_CAP2_NO_WRITE_PROTECT (1 << 18) /* No physical write protect pin, assume that card is always read-write */
#define MMC_CAP2_NO_SDIO (1 << 19) /* Do not send SDIO commands during initialization */
#define MMC_CAP2_HS400_ES (1 << 20) /* Host supports enhanced strobe */
+#define MMC_CAP2_NO_SD (1 << 21) /* Do not send SD commands during initialization */
mmc_pm_flag_t pm_caps; /* supported pm features */
--
1.9.1
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