@@ -126,6 +126,10 @@
#define OMAP_MMC_MAX_CLOCK 52000000
#define DRIVER_NAME "omap_hsmmc"
+#define VDD_1V8 1800000 /* 180000 uV */
+#define VDD_3V0 3000000 /* 300000 uV */
+#define VDD_165_195 (ffs(MMC_VDD_165_195) - 1)
+
/*
* One controller can have multiple slots, like on some omap boards using
* omap.c controller driver. Luckily this is not currently done on any known
@@ -164,6 +168,8 @@ struct omap_hsmmc_host {
*/
struct regulator *vcc;
struct regulator *vcc_aux;
+ struct regulator *pbias;
+ bool pbias_enabled;
int pbias_disable;
void __iomem *base;
resource_size_t mapbase;
@@ -272,6 +278,15 @@ static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on,
if (mmc_slot(host).before_set_reg)
mmc_slot(host).before_set_reg(dev, slot, power_on, vdd);
+ if (host->pbias) {
+ if (host->pbias_enabled == 1) {
+ ret = regulator_disable(host->pbias);
+ if (!ret)
+ host->pbias_enabled = 0;
+ }
+ regulator_set_voltage(host->pbias, VDD_3V0, VDD_3V0);
+ }
+
/*
* Assume Vcc regulator is used only to power the card ... OMAP
* VDDS is used to power the pins, optionally with a transceiver to
@@ -306,9 +321,27 @@ static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on,
}
}
+ if (host->pbias) {
+ if (vdd <= VDD_165_195)
+ ret = regulator_set_voltage(host->pbias, VDD_1V8,
+ VDD_1V8);
+ else
+ ret = regulator_set_voltage(host->pbias, VDD_3V0,
+ VDD_3V0);
+ if (ret < 0)
+ goto error_set_power;
+
+ if (host->pbias_enabled == 0) {
+ ret = regulator_enable(host->pbias);
+ if (!ret)
+ host->pbias_enabled = 1;
+ }
+ }
+
if (mmc_slot(host).after_set_reg)
mmc_slot(host).after_set_reg(dev, slot, power_on, vdd);
+error_set_power:
return ret;
}
@@ -342,6 +375,9 @@ static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host)
reg = devm_regulator_get_optional(host->dev, "vmmc_aux");
host->vcc_aux = IS_ERR(reg) ? NULL : reg;
+ reg = devm_regulator_get_optional(host->dev, "pbias");
+ host->pbias = IS_ERR(reg) ? NULL : reg;
+
/* For eMMC do not power off when not in sleep state */
if (mmc_slot(host).no_regulator_off_init)
return 0;
@@ -1808,6 +1844,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
host->base = ioremap(host->mapbase, SZ_4K);
host->power_mode = MMC_POWER_OFF;
host->next_data.cookie = 1;
+ host->pbias_enabled = 0;
platform_set_drvdata(pdev, host);
In DT case, PBAIS registers are programmed via regulator, use regulator APIs to control PBIAS. Signed-off-by: Balaji T K <balajitk@ti.com> --- drivers/mmc/host/omap_hsmmc.c | 37 +++++++++++++++++++++++++++++++++++++ 1 files changed, 37 insertions(+), 0 deletions(-)