From: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
The mmc core will only enable UHS modes if the host supports the
.start_signal_voltage_switch() operation. Add this method to the v08r07
driver even if there's actually nothing to do in it.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
Signed-off-by: Phil Edworthy <phil@xxxxxxxxxxxxx>
Signed-off-by: Lars Persson <larper@xxxxxxxx>
---
drivers/mmc/host/usdhi6rol0.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/drivers/mmc/host/usdhi6rol0.c b/drivers/mmc/host/usdhi6rol0.c
index 807c06e..5dde31b 100644
--- a/drivers/mmc/host/usdhi6rol0.c
+++ b/drivers/mmc/host/usdhi6rol0.c
@@ -23,6 +23,7 @@
#include <linux/module.h>
#include <linux/pagemap.h>
#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
#include <linux/scatterlist.h>
#include <linux/string.h>
#include <linux/time.h>
@@ -1147,12 +1148,43 @@ static void usdhi6_enable_sdio_irq(struct mmc_host *mmc, int enable)
}
}
+static int usdhi6_sig_volt_switch(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ int ret;
+
+ if (IS_ERR(mmc->supply.vqmmc))
+ return 0;
+
+ switch (ios->signal_voltage) {
+ case MMC_SIGNAL_VOLTAGE_330:
+ ret = regulator_set_voltage(mmc->supply.vqmmc,
+ 2700000, 3600000);
+ break;
+ case MMC_SIGNAL_VOLTAGE_180:
+ ret = regulator_set_voltage(mmc->supply.vqmmc,
+ 1700000, 1950000);
+ break;
+ case MMC_SIGNAL_VOLTAGE_120:
+ ret = regulator_set_voltage(mmc->supply.vqmmc,
+ 1100000, 1300000);
+ break;
+ default:
+ return 0;
+ }
+
+ if (ret < 0)
+ dev_warn(mmc_dev(mmc), "Voltage switch failed: %d\n", ret);
+
+ return ret;
+}
+
static struct mmc_host_ops usdhi6_ops = {
.request = usdhi6_request,
.set_ios = usdhi6_set_ios,
.get_cd = usdhi6_get_cd,
.get_ro = usdhi6_get_ro,
.enable_sdio_irq = usdhi6_enable_sdio_irq,
+ .start_signal_voltage_switch = usdhi6_sig_volt_switch,
};
/* State machine handlers */
--
2.1.4
--
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