4.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zhoujie Wu <zjwu@xxxxxxxxxxx>
commit 99c14fc360dbbb583a03ab985551b12b5c5ca4f1 upstream.
Xenon sdh controller requests proper SD bus voltage select
bits programmed even with vmmc power supply. Any reserved
value(100b-000b) programmed in this field will lead to controller
ignore SD bus power bit and keep its value at zero.
Add set_power callback to handle this.
Signed-off-by: Zhoujie Wu <zjwu@xxxxxxxxxxx>
Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Tested-by: Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx>
Fixes: 3a3748dba881 ("mmc: sdhci-xenon: Add Marvell Xenon SDHC core functionality")
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/host/sdhci-xenon.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
--- a/drivers/mmc/host/sdhci-xenon.c
+++ b/drivers/mmc/host/sdhci-xenon.c
@@ -210,8 +210,27 @@ static void xenon_set_uhs_signaling(stru
sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
}
+static void xenon_set_power(struct sdhci_host *host, unsigned char mode,
+ unsigned short vdd)
+{
+ struct mmc_host *mmc = host->mmc;
+ u8 pwr = host->pwr;
+
+ sdhci_set_power_noreg(host, mode, vdd);
+
+ if (host->pwr == pwr)
+ return;
+
+ if (host->pwr == 0)
+ vdd = 0;
+
+ if (!IS_ERR(mmc->supply.vmmc))
+ mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
+}
+
static const struct sdhci_ops sdhci_xenon_ops = {
.set_clock = sdhci_set_clock,
+ .set_power = xenon_set_power,
.set_bus_width = sdhci_set_bus_width,
.reset = xenon_reset,
.set_uhs_signaling = xenon_set_uhs_signaling,