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

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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>
This commit is contained in:
Diwakar Sharma 2018-04-10 12:30:32 +05:30 committed by Ulf Hansson
parent ebc5a1bf4f
commit 8ccd66f258
2 changed files with 4 additions and 0 deletions
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3
drivers/mmc/core/quirks.h
View File

@ -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
};

1
include/linux/mmc/sdio_ids.h
View File

@ -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