diff options
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/sprd-sc27xx-spi.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/mfd/sprd-sc27xx-spi.c b/drivers/mfd/sprd-sc27xx-spi.c index c0529a1cd5ea..ebdf2f11ae28 100644 --- a/drivers/mfd/sprd-sc27xx-spi.c +++ b/drivers/mfd/sprd-sc27xx-spi.c @@ -10,6 +10,7 @@ #include <linux/of_device.h> #include <linux/regmap.h> #include <linux/spi/spi.h> +#include <uapi/linux/usb/charger.h> #define SPRD_PMIC_INT_MASK_STATUS 0x0 #define SPRD_PMIC_INT_RAW_STATUS 0x4 @@ -17,6 +18,16 @@ #define SPRD_SC2731_IRQ_BASE 0x140 #define SPRD_SC2731_IRQ_NUMS 16 +#define SPRD_SC2731_CHG_DET 0xedc + +/* PMIC charger detection definition */ +#define SPRD_PMIC_CHG_DET_DELAY_US 200000 +#define SPRD_PMIC_CHG_DET_TIMEOUT 2000000 +#define SPRD_PMIC_CHG_DET_DONE BIT(11) +#define SPRD_PMIC_SDP_TYPE BIT(7) +#define SPRD_PMIC_DCP_TYPE BIT(6) +#define SPRD_PMIC_CDP_TYPE BIT(5) +#define SPRD_PMIC_CHG_TYPE_MASK GENMASK(7, 5) struct sprd_pmic { struct regmap *regmap; @@ -24,12 +35,14 @@ struct sprd_pmic { struct regmap_irq *irqs; struct regmap_irq_chip irq_chip; struct regmap_irq_chip_data *irq_data; + const struct sprd_pmic_data *pdata; int irq; }; struct sprd_pmic_data { u32 irq_base; u32 num_irqs; + u32 charger_det; }; /* @@ -40,8 +53,46 @@ struct sprd_pmic_data { static const struct sprd_pmic_data sc2731_data = { .irq_base = SPRD_SC2731_IRQ_BASE, .num_irqs = SPRD_SC2731_IRQ_NUMS, + .charger_det = SPRD_SC2731_CHG_DET, }; +enum usb_charger_type sprd_pmic_detect_charger_type(struct device *dev) +{ + struct spi_device *spi = to_spi_device(dev); + struct sprd_pmic *ddata = spi_get_drvdata(spi); + const struct sprd_pmic_data *pdata = ddata->pdata; + enum usb_charger_type type; + u32 val; + int ret; + + ret = regmap_read_poll_timeout(ddata->regmap, pdata->charger_det, val, + (val & SPRD_PMIC_CHG_DET_DONE), + SPRD_PMIC_CHG_DET_DELAY_US, + SPRD_PMIC_CHG_DET_TIMEOUT); + if (ret) { + dev_err(&spi->dev, "failed to detect charger type\n"); + return UNKNOWN_TYPE; + } + + switch (val & SPRD_PMIC_CHG_TYPE_MASK) { + case SPRD_PMIC_CDP_TYPE: + type = CDP_TYPE; + break; + case SPRD_PMIC_DCP_TYPE: + type = DCP_TYPE; + break; + case SPRD_PMIC_SDP_TYPE: + type = SDP_TYPE; + break; + default: + type = UNKNOWN_TYPE; + break; + } + + return type; +} +EXPORT_SYMBOL_GPL(sprd_pmic_detect_charger_type); + static const struct mfd_cell sprd_pmic_devs[] = { { .name = "sc27xx-wdt", @@ -181,6 +232,7 @@ static int sprd_pmic_probe(struct spi_device *spi) spi_set_drvdata(spi, ddata); ddata->dev = &spi->dev; ddata->irq = spi->irq; + ddata->pdata = pdata; ddata->irq_chip.name = dev_name(&spi->dev); ddata->irq_chip.status_base = |