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Subject[PATCH 03/41] mmc: host: omap_hsmmc: Program HCTL based on signal_voltage set by mmc core
Date
HCTL is now set based on ios.signal_voltage set by mmc core and not
hardcoded to 3V0 if OMAP_HSMMC_SUPPORTS_DUAL_VOLT is set. If
OMAP_HSMMC_SUPPORTS_DUAL_VOLT is set, it means HCTL can be set to either
3V0 or 1V8. And it should be set to 3V0 or 1V8 depending on
ios.signal_voltage.
Also it is now set on power mode status being changed to MMC_POWER_ON.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
---
drivers/mmc/host/omap_hsmmc.c | 16 +++++++---------
1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 42954efe12f7..893d1624a5a3 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -229,6 +229,7 @@ struct omap_mmc_of_data {
};

static void omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host);
+static void omap_hsmmc_conf_bus_power(struct omap_hsmmc_host *host, int iov);

static int omap_hsmmc_card_detect(struct device *dev)
{
@@ -1664,6 +1665,7 @@ static void omap_hsmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
omap_hsmmc_set_power(host, 1, ios->vdd);
break;
case MMC_POWER_ON:
+ omap_hsmmc_conf_bus_power(host, ios->signal_voltage);
do_send_init_stream = 1;
break;
}
@@ -1824,17 +1826,12 @@ static void omap_hsmmc_set_capabilities(struct omap_hsmmc_host *host)
OMAP_HSMMC_WRITE(host->base, CAPA, val);
}

-static void omap_hsmmc_conf_bus_power(struct omap_hsmmc_host *host)
+static void omap_hsmmc_conf_bus_power(struct omap_hsmmc_host *host, int iov)
{
u32 hctl, value;

- /* Only MMC1 supports 3.0V */
- if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT)
- hctl = SDVS30;
- else
- hctl = SDVS18;
-
value = OMAP_HSMMC_READ(host->base, HCTL) & ~SDVS_MASK;
+ hctl = (iov == MMC_SIGNAL_VOLTAGE_180) ? SDVS18 : SDVS30;
OMAP_HSMMC_WRITE(host->base, HCTL, value | hctl);

/* Set SD bus power bit */
@@ -2144,7 +2141,6 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
mmc->pm_caps |= mmc_pdata(host)->pm_caps;

omap_hsmmc_set_capabilities(host);
- omap_hsmmc_conf_bus_power(host);

host->rx_chan = dma_request_chan(&pdev->dev, "rx");
if (IS_ERR(host->rx_chan)) {
@@ -2281,6 +2277,7 @@ static int omap_hsmmc_suspend(struct device *dev)
static int omap_hsmmc_resume(struct device *dev)
{
struct omap_hsmmc_host *host = dev_get_drvdata(dev);
+ struct mmc_ios *ios;

if (!host)
return 0;
@@ -2290,8 +2287,9 @@ static int omap_hsmmc_resume(struct device *dev)
if (host->dbclk)
clk_prepare_enable(host->dbclk);

+ ios = &host->mmc->ios;
if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER))
- omap_hsmmc_conf_bus_power(host);
+ omap_hsmmc_conf_bus_power(host, ios->signal_voltage);

omap_hsmmc_protect_card(host);
pm_runtime_mark_last_busy(host->dev);
--
2.11.0
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