Add a start_signal_voltage_switch() operation to support enabling of
UHS modes.
Signed-off-by: Lars Persson <larper@xxxxxxxx>
---
drivers/mmc/host/usdhi6rol0.c | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/usdhi6rol0.c b/drivers/mmc/host/usdhi6rol0.c
index 807c06e..28fe5c7 100644
--- a/drivers/mmc/host/usdhi6rol0.c
+++ b/drivers/mmc/host/usdhi6rol0.c
@@ -21,6 +21,7 @@
#include <linux/mmc/sd.h>
#include <linux/mmc/sdio.h>
#include <linux/module.h>
+#include <linux/of.h>
#include <linux/pagemap.h>
#include <linux/platform_device.h>
#include <linux/scatterlist.h>
@@ -1147,12 +1148,22 @@ 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;
+
+ ret = mmc_regulator_set_vqmmc(mmc, ios);
+
+ 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 */
@@ -1785,7 +1796,17 @@ static int usdhi6_probe(struct platform_device *pdev)
mmc->ops = &usdhi6_ops;
mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED |
- MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_DDR50 | MMC_CAP_SDIO_IRQ;
+ MMC_CAP_SDIO_IRQ;
+
+ /*
+ * A vqmmc regulator with a 1.8V mode is mandatory to support
+ * UHS modes.
+ */
+ if (!of_property_read_bool(dev->of_node, "no-1-8-v") &&
+ !IS_ERR(mmc->supply.vqmmc)) {
+ mmc->caps |= MMC_CAP_UHS_DDR50 | MMC_CAP_UHS_SDR50;
+ }
+
/* Set .max_segs to some random number. Feel free to adjust. */
mmc->max_segs = 32;
mmc->max_blk_size = 512;
--
2.1.4
--
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