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mmc: sdhci-msm: Add support to store supported vdd-io voltages 

During probe check whether the vdd-io regulator of sdhc platform device
can support 1.8V and 3V and store this information as a capability of
platform device.

Signed-off-by: Vijay Viswanath <vviswana@codeaurora.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Vijay Viswanath 2018-04-20 17:45:28 +05:30 committed by Ulf Hansson
parent e419768f32
commit ac06fba1de
1 changed files with 28 additions and 1 deletions
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29
drivers/mmc/host/sdhci-msm.c
View File

@ -21,6 +21,7 @@
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/iopoll.h>
#include <linux/regulator/consumer.h>
#include "sdhci-pltfm.h"
@ -81,6 +82,9 @@
#define CORE_HC_SELECT_IN_HS400 (6 << 19)
#define CORE_HC_SELECT_IN_MASK (7 << 19)
#define CORE_3_0V_SUPPORT (1 << 25)
#define CORE_1_8V_SUPPORT (1 << 26)
#define CORE_CSR_CDC_CTLR_CFG0 0x130
#define CORE_SW_TRIG_FULL_CALIB BIT(16)
#define CORE_HW_AUTOCAL_ENA BIT(17)
@ -148,6 +152,7 @@ struct sdhci_msm_host {
u32 curr_io_level;
wait_queue_head_t pwr_irq_wait;
bool pwr_irq_flag;
u32 caps_0;
};
static unsigned int msm_get_clock_rate_for_bus_mode(struct sdhci_host *host,
@ -1103,7 +1108,7 @@ static void sdhci_msm_handle_pwr_irq(struct sdhci_host *host, int irq)
struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
u32 irq_status, irq_ack = 0;
int retry = 10;
int pwr_state = 0, io_level = 0;
u32 pwr_state = 0, io_level = 0;
irq_status = readl_relaxed(msm_host->core_mem + CORE_PWRCTL_STATUS);
@ -1313,6 +1318,27 @@ static void sdhci_msm_writeb(struct sdhci_host *host, u8 val, int reg)
sdhci_msm_check_power_status(host, req_type);
}
static void sdhci_msm_set_regulator_caps(struct sdhci_msm_host *msm_host)
{
struct mmc_host *mmc = msm_host->mmc;
struct regulator *supply = mmc->supply.vqmmc;
u32 caps = 0;
if (!IS_ERR(mmc->supply.vqmmc)) {
if (regulator_is_supported_voltage(supply, 1700000, 1950000))
caps |= CORE_1_8V_SUPPORT;
if (regulator_is_supported_voltage(supply, 2700000, 3600000))
caps |= CORE_3_0V_SUPPORT;
if (!caps)
pr_warn("%s: 1.8/3V not supported for vqmmc\n",
mmc_hostname(mmc));
}
msm_host->caps_0 |= caps;
pr_debug("%s: supported caps: 0x%08x\n", mmc_hostname(mmc), caps);
}
static const struct of_device_id sdhci_msm_dt_match[] = {
{ .compatible = "qcom,sdhci-msm-v4" },
{},
@ -1530,6 +1556,7 @@ static int sdhci_msm_probe(struct platform_device *pdev)
ret = sdhci_add_host(host);
if (ret)
goto pm_runtime_disable;
sdhci_msm_set_regulator_caps(msm_host);
pm_runtime_mark_last_busy(&pdev->dev);
pm_runtime_put_autosuspend(&pdev->dev);