diff options
Diffstat (limited to 'drivers/iio/adc')
| -rw-r--r-- | drivers/iio/adc/exynos_adc.c | 30 |
1 files changed, 21 insertions, 9 deletions
diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c index 43620fd4c66a..fe0317745436 100644 --- a/drivers/iio/adc/exynos_adc.c +++ b/drivers/iio/adc/exynos_adc.c @@ -39,6 +39,8 @@ #include <linux/iio/iio.h> #include <linux/iio/machine.h> #include <linux/iio/driver.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> /* S3C/EXYNOS4412/5250 ADC_V1 registers definitions */ #define ADC_V1_CON(x) ((x) + 0x00) @@ -90,11 +92,14 @@ #define EXYNOS_ADC_TIMEOUT (msecs_to_jiffies(100)) +#define EXYNOS_ADCV1_PHY_OFFSET 0x0718 +#define EXYNOS_ADCV2_PHY_OFFSET 0x0720 + struct exynos_adc { struct exynos_adc_data *data; struct device *dev; void __iomem *regs; - void __iomem *enable_reg; + struct regmap *pmu_map; struct clk *clk; struct clk *sclk; unsigned int irq; @@ -110,6 +115,7 @@ struct exynos_adc_data { int num_channels; bool needs_sclk; bool needs_adc_phy; + int phy_offset; u32 mask; void (*init_hw)(struct exynos_adc *info); @@ -183,7 +189,7 @@ static void exynos_adc_v1_init_hw(struct exynos_adc *info) u32 con1; if (info->data->needs_adc_phy) - writel(1, info->enable_reg); + regmap_write(info->pmu_map, info->data->phy_offset, 1); /* set default prescaler values and Enable prescaler */ con1 = ADC_V1_CON_PRSCLV(49) | ADC_V1_CON_PRSCEN; @@ -198,7 +204,7 @@ static void exynos_adc_v1_exit_hw(struct exynos_adc *info) u32 con; if (info->data->needs_adc_phy) - writel(0, info->enable_reg); + regmap_write(info->pmu_map, info->data->phy_offset, 0); con = readl(ADC_V1_CON(info->regs)); con |= ADC_V1_CON_STANDBY; @@ -225,6 +231,7 @@ static const struct exynos_adc_data exynos_adc_v1_data = { .num_channels = MAX_ADC_V1_CHANNELS, .mask = ADC_DATX_MASK, /* 12 bit ADC resolution */ .needs_adc_phy = true, + .phy_offset = EXYNOS_ADCV1_PHY_OFFSET, .init_hw = exynos_adc_v1_init_hw, .exit_hw = exynos_adc_v1_exit_hw, @@ -314,7 +321,7 @@ static void exynos_adc_v2_init_hw(struct exynos_adc *info) u32 con1, con2; if (info->data->needs_adc_phy) - writel(1, info->enable_reg); + regmap_write(info->pmu_map, info->data->phy_offset, 1); con1 = ADC_V2_CON1_SOFT_RESET; writel(con1, ADC_V2_CON1(info->regs)); @@ -332,7 +339,7 @@ static void exynos_adc_v2_exit_hw(struct exynos_adc *info) u32 con; if (info->data->needs_adc_phy) - writel(0, info->enable_reg); + regmap_write(info->pmu_map, info->data->phy_offset, 0); con = readl(ADC_V2_CON1(info->regs)); con &= ~ADC_CON_EN_START; @@ -362,6 +369,7 @@ static const struct exynos_adc_data exynos_adc_v2_data = { .num_channels = MAX_ADC_V2_CHANNELS, .mask = ADC_DATX_MASK, /* 12 bit ADC resolution */ .needs_adc_phy = true, + .phy_offset = EXYNOS_ADCV2_PHY_OFFSET, .init_hw = exynos_adc_v2_init_hw, .exit_hw = exynos_adc_v2_exit_hw, @@ -374,6 +382,7 @@ static const struct exynos_adc_data exynos3250_adc_data = { .mask = ADC_DATX_MASK, /* 12 bit ADC resolution */ .needs_sclk = true, .needs_adc_phy = true, + .phy_offset = EXYNOS_ADCV1_PHY_OFFSET, .init_hw = exynos_adc_v2_init_hw, .exit_hw = exynos_adc_v2_exit_hw, @@ -558,10 +567,13 @@ static int exynos_adc_probe(struct platform_device *pdev) if (info->data->needs_adc_phy) { - mem = platform_get_resource(pdev, IORESOURCE_MEM, 1); - info->enable_reg = devm_ioremap_resource(&pdev->dev, mem); - if (IS_ERR(info->enable_reg)) - return PTR_ERR(info->enable_reg); + info->pmu_map = syscon_regmap_lookup_by_phandle( + pdev->dev.of_node, + "samsung,syscon-phandle"); + if (IS_ERR(info->pmu_map)) { + dev_err(&pdev->dev, "syscon regmap lookup failed.\n"); + return PTR_ERR(info->pmu_map); + } } irq = platform_get_irq(pdev, 0); |
