From: Carlo Caione <carlo@xxxxxxxxxxxx>
This patch introduce a new MMC_CAP2_NO_SDIO cap used to tell the mmc
core to not send SDIO specific commands.
Signed-off-by: Carlo Caione <carlo@xxxxxxxxxxxx>
---
Drivers fix will follow.
Changelog:
* v2:
- moved check from __mmc_start_request to mmc_rescan_try_freq
---
drivers/mmc/core/core.c | 11 ++++++++---
include/linux/mmc/host.h | 1 +
2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 5ae89e4..8a4e0d2 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2476,15 +2476,20 @@ static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
* sdio_reset sends CMD52 to reset card. Since we do not know
* if the card is being re-initialized, just send it. CMD52
* should be ignored by SD/eMMC cards.
+ * Skip it if we already know that we do not support SDIO commands
*/
- sdio_reset(host);
+ if (!(host->caps2 & MMC_CAP2_NO_SDIO))
+ sdio_reset(host);
+
mmc_go_idle(host);
mmc_send_if_cond(host, host->ocr_avail);
/* Order's important: probe SDIO, then SD, then MMC */
- if (!mmc_attach_sdio(host))
- return 0;
+ if (!(host->caps2 & MMC_CAP2_NO_SDIO))
+ if (!mmc_attach_sdio(host))
+ return 0;
+
if (!mmc_attach_sd(host))
return 0;
if (!mmc_attach_mmc(host))
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 8673ffe..cf6d0bb 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -289,6 +289,7 @@ struct mmc_host {
#define MMC_CAP2_HSX00_1_2V (MMC_CAP2_HS200_1_2V_SDR | MMC_CAP2_HS400_1_2V)
#define MMC_CAP2_SDIO_IRQ_NOTHREAD (1 << 17)
#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 */
mmc_pm_flag_t pm_caps; /* supported pm features */
--
2.5.0
--
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