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>

diff --git a/drivers/mmc/core/quirks.h b/drivers/mmc/core/quirks.h
index 5153577..dd2f73a 100644 (file)
--- 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 cdd66a5..2836a96 100644 (file)
--- 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