diff options
| -rw-r--r-- | drivers/thermal/armada_thermal.c | 76 |
1 files changed, 54 insertions, 22 deletions
diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c index f350d7efd35a..d58376eba6d9 100644 --- a/drivers/thermal/armada_thermal.c +++ b/drivers/thermal/armada_thermal.c @@ -39,12 +39,21 @@ #define A375_HW_RESETn BIT(8) #define A380_HW_RESET BIT(8) +/* Legacy bindings */ +#define LEGACY_CONTROL_MEM_LEN 0x4 + +/* Current bindings with the 2 control registers under the same memory area */ +#define LEGACY_CONTROL1_OFFSET 0x0 +#define CONTROL0_OFFSET 0x0 +#define CONTROL1_OFFSET 0x4 + struct armada_thermal_data; /* Marvell EBU Thermal Sensor Dev Structure */ struct armada_thermal_priv { void __iomem *sensor; - void __iomem *control; + void __iomem *control0; + void __iomem *control1; struct armada_thermal_data *data; }; @@ -66,27 +75,28 @@ struct armada_thermal_data { unsigned int temp_shift; unsigned int temp_mask; u32 is_valid_bit; + bool needs_control0; }; static void armadaxp_init_sensor(struct platform_device *pdev, struct armada_thermal_priv *priv) { - unsigned long reg; + u32 reg; - reg = readl_relaxed(priv->control); + reg = readl_relaxed(priv->control1); reg |= PMU_TDC0_OTF_CAL_MASK; - writel(reg, priv->control); + writel(reg, priv->control1); /* Reference calibration value */ reg &= ~PMU_TDC0_REF_CAL_CNT_MASK; reg |= (0xf1 << PMU_TDC0_REF_CAL_CNT_OFFS); - writel(reg, priv->control); + writel(reg, priv->control1); /* Reset the sensor */ - reg = readl_relaxed(priv->control); - writel((reg | PMU_TDC0_SW_RST_MASK), priv->control); + reg = readl_relaxed(priv->control1); + writel((reg | PMU_TDC0_SW_RST_MASK), priv->control1); - writel(reg, priv->control); + writel(reg, priv->control1); /* Enable the sensor */ reg = readl_relaxed(priv->sensor); @@ -97,19 +107,19 @@ static void armadaxp_init_sensor(struct platform_device *pdev, static void armada370_init_sensor(struct platform_device *pdev, struct armada_thermal_priv *priv) { - unsigned long reg; + u32 reg; - reg = readl_relaxed(priv->control); + reg = readl_relaxed(priv->control1); reg |= PMU_TDC0_OTF_CAL_MASK; - writel(reg, priv->control); + writel(reg, priv->control1); /* Reference calibration value */ reg &= ~PMU_TDC0_REF_CAL_CNT_MASK; reg |= (0xf1 << PMU_TDC0_REF_CAL_CNT_OFFS); - writel(reg, priv->control); + writel(reg, priv->control1); reg &= ~PMU_TDC0_START_CAL_MASK; - writel(reg, priv->control); + writel(reg, priv->control1); msleep(10); } @@ -117,30 +127,30 @@ static void armada370_init_sensor(struct platform_device *pdev, static void armada375_init_sensor(struct platform_device *pdev, struct armada_thermal_priv *priv) { - unsigned long reg; + u32 reg; - reg = readl(priv->control + 4); + reg = readl(priv->control1); reg &= ~(A375_UNIT_CONTROL_MASK << A375_UNIT_CONTROL_SHIFT); reg &= ~A375_READOUT_INVERT; reg &= ~A375_HW_RESETn; - writel(reg, priv->control + 4); + writel(reg, priv->control1); msleep(20); reg |= A375_HW_RESETn; - writel(reg, priv->control + 4); + writel(reg, priv->control1); msleep(50); } static void armada380_init_sensor(struct platform_device *pdev, struct armada_thermal_priv *priv) { - unsigned long reg = readl_relaxed(priv->control); + u32 reg = readl_relaxed(priv->control1); /* Reset hardware once */ if (!(reg & A380_HW_RESET)) { reg |= A380_HW_RESET; - writel(reg, priv->control); + writel(reg, priv->control1); msleep(10); } } @@ -214,6 +224,7 @@ static const struct armada_thermal_data armada375_data = { .coef_b = 3171900000UL, .coef_m = 10000000UL, .coef_div = 13616, + .needs_control0 = true, }; static const struct armada_thermal_data armada380_data = { @@ -253,6 +264,7 @@ MODULE_DEVICE_TABLE(of, armada_thermal_id_table); static int armada_thermal_probe(struct platform_device *pdev) { + void __iomem *control = NULL; struct thermal_zone_device *thermal; const struct of_device_id *match; struct armada_thermal_priv *priv; @@ -272,11 +284,31 @@ static int armada_thermal_probe(struct platform_device *pdev) return PTR_ERR(priv->sensor); res = platform_get_resource(pdev, IORESOURCE_MEM, 1); - priv->control = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(priv->control)) - return PTR_ERR(priv->control); + control = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(control)) + return PTR_ERR(control); priv->data = (struct armada_thermal_data *)match->data; + + /* + * Legacy DT bindings only described "control1" register (also referred + * as "control MSB" on old documentation). New bindings cover + * "control0/control LSB" and "control1/control MSB" registers within + * the same resource, which is then of size 8 instead of 4. + */ + if (resource_size(res) == LEGACY_CONTROL_MEM_LEN) { + /* ->control0 unavailable in this configuration */ + if (priv->data->needs_control0) { + dev_err(&pdev->dev, "No access to control0 register\n"); + return -EINVAL; + } + + priv->control1 = control + LEGACY_CONTROL1_OFFSET; + } else { + priv->control0 = control + CONTROL0_OFFSET; + priv->control1 = control + CONTROL1_OFFSET; + } + priv->data->init_sensor(pdev, priv); thermal = thermal_zone_device_register("armada_thermal", 0, 0, |