mmc: core: sdio: Set SDIO clock of SDR104 to 150MHz for Marvell 8887 chip

This patch uses limit clock rate quirk to reduce clock rate
for "SDR104" mode on IMX side for Marvell 8887
WiFi + Bluetooth chip side, as Marvell does not recommend
to use SDIO at the speed of higher than 150MHz.

Signed-off-by: Diwakar Sharma <diwakar.sharma@in.bosch.com>
Signed-off-by: Harish Jenny K N <harish_kandiga@mentor.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

2 files changed, 4 insertions, 0 deletions

diff --git a/drivers/mmc/core/quirks.h b/drivers/mmc/core/quirks.h
index 5153577754f0..dd2f73af8f2c 100644
--- a/drivers/mmc/core/quirks.h
+++ b/drivers/mmc/core/quirks.h
@@ -132,6 +132,9 @@ static const struct mmc_fixup sdio_fixup_methods[] = {
         SDIO_FIXUP(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8797_F0,
                    add_quirk, MMC_QUIRK_BROKEN_IRQ_POLLING),
 
+        SDIO_FIXUP(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8887WLAN,
+                   add_limit_rate_quirk, 150000000),
+
         END_FIXUP
 };
 
diff --git a/include/linux/mmc/sdio_ids.h b/include/linux/mmc/sdio_ids.h
index cdd66a5fbd5e..2836a96e014a 100644
--- a/include/linux/mmc/sdio_ids.h
+++ b/include/linux/mmc/sdio_ids.h
@@ -55,6 +55,7 @@
 #define SDIO_DEVICE_ID_MARVELL_8688WLAN         0x9104
 #define SDIO_DEVICE_ID_MARVELL_8688BT           0x9105
 #define SDIO_DEVICE_ID_MARVELL_8797_F0          0x9128
+#define SDIO_DEVICE_ID_MARVELL_8887WLAN 0x9134
 
 #define SDIO_VENDOR_ID_SIANO                    0x039a
 #define SDIO_DEVICE_ID_SIANO_NOVA_B0            0x0201