mfd: palmas: Add SMPS10_BOOST feature

The SMPS10 regulator is not presesnt in all the variants
of the PALMAS PMIC family. Hence adding a feature to distingush
between them.
Signed-off-by: J Keerthy <j-keerthy@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/palmas.c

@@ -23,7 +23,7 @@
 #include <linux/err.h>
 #include <linux/mfd/core.h>
 #include <linux/mfd/palmas.h>
-#include <linux/of_platform.h>
+#include <linux/of_device.h>
 
 static const struct regmap_config palmas_regmap_config[PALMAS_NUM_CLIENTS] = {
 	{
@@ -231,6 +231,16 @@ static void palmas_dt_to_pdata(struct i2c_client *i2c,
 		palmas_set_pdata_irq_flag(i2c, pdata);
 }
 
+static unsigned int palmas_features = PALMAS_PMIC_FEATURE_SMPS10_BOOST;
+
+static const struct of_device_id of_palmas_match_tbl[] = {
+	{
+		.compatible = "ti,palmas",
+		.data = &palmas_features,
+	},
+	{ },
+};
+
 static int palmas_i2c_probe(struct i2c_client *i2c,
 			    const struct i2c_device_id *id)
 {
@@ -238,8 +248,9 @@ static int palmas_i2c_probe(struct i2c_client *i2c,
 	struct palmas_platform_data *pdata;
 	struct device_node *node = i2c->dev.of_node;
 	int ret = 0, i;
-	unsigned int reg, addr;
+	unsigned int reg, addr, *features;
 	int slave;
+	const struct of_device_id *match;
 
 	pdata = dev_get_platdata(&i2c->dev);
 
@@ -261,9 +272,16 @@ static int palmas_i2c_probe(struct i2c_client *i2c,
 
 	i2c_set_clientdata(i2c, palmas);
 	palmas->dev = &i2c->dev;
-	palmas->id = id->driver_data;
 	palmas->irq = i2c->irq;
 
+	match = of_match_device(of_match_ptr(of_palmas_match_tbl), &i2c->dev);
+
+	if (!match)
+		return -ENODATA;
+
+	features = (unsigned int *)match->data;
+	palmas->features = *features;
+
 	for (i = 0; i < PALMAS_NUM_CLIENTS; i++) {
 		if (i == 0)
 			palmas->i2c_clients[i] = i2c;
@@ -433,11 +451,6 @@ static const struct i2c_device_id palmas_i2c_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, palmas_i2c_id);
 
-static struct of_device_id of_palmas_match_tbl[] = {
-	{ .compatible = "ti,palmas", },
-	{ /* end */ }
-};
-
 static struct i2c_driver palmas_i2c_driver = {
 	.driver = {
 		   .name = "palmas",

drivers/regulator/palmas-regulator.c

@@ -838,6 +838,9 @@ static int palmas_regulators_probe(struct platform_device *pdev)
 				continue;
 			ramp_delay_support = true;
 			break;
+		case PALMAS_REG_SMPS10:
+			if (!PALMAS_PMIC_HAS(palmas, SMPS10_BOOST))
+				continue;
 		}
 
 		if ((id == PALMAS_REG_SMPS6) || (id == PALMAS_REG_SMPS8))

include/linux/mfd/palmas.h

@@ -32,6 +32,19 @@
 			((a) == PALMAS_CHIP_ID))
 #define is_palmas_charger(a) ((a) == PALMAS_CHIP_CHARGER_ID)
 
+/**
+ * Palmas PMIC feature types
+ *
+ * PALMAS_PMIC_FEATURE_SMPS10_BOOST - used when the PMIC provides SMPS10_BOOST
+ *	regulator.
+ *
+ * PALMAS_PMIC_HAS(b, f) - macro to check if a bandgap device is capable of a
+ *	specific feature (above) or not. Return non-zero, if yes.
+ */
+#define PALMAS_PMIC_FEATURE_SMPS10_BOOST	BIT(0)
+#define PALMAS_PMIC_HAS(b, f)			\
+			((b)->features & PALMAS_PMIC_FEATURE_ ## f)
+
 struct palmas_pmic;
 struct palmas_gpadc;
 struct palmas_resource;
@@ -46,6 +59,7 @@ struct palmas {
 	/* Stored chip id */
 	int id;
 
+	unsigned int features;
 	/* IRQ Data */
 	int irq;
 	u32 irq_mask;