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authorHeiko Stuebner <heiko@sntech.de>2014-09-16 21:22:54 +0200
committerMark Brown <broonie@kernel.org>2014-09-16 16:09:32 -0700
commitee30928ab616786cae926c5c2efaa4303ba66802 (patch)
tree1ef5e87a9167f017d16caa119e26a60f4fb511c9
parent91f23d8fb67c90a50676e4db9260a21647ef753f (diff)
regulator: fan53555: add support for Silergy SYR82x regulators
Silergy SYR82x regulators share the exact same functionality and register layout as the Fairchild FAN53555 regulators. Therefore extend the driver to add support for them. Both types use the same vendor id in their ID1 register, so it's not possible to distinguish them automatically. Similarly, the types also do not match. Type 8 used by the SYR827 and SYR828 start at 712.5mV and increment in 12.5mv steps, while the FAN53555 type 8 starts at 600mV and increments in 10mV steps. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mark Brown <broonie@kernel.org>
-rw-r--r--Documentation/devicetree/bindings/regulator/fan53555.txt2
-rw-r--r--Documentation/devicetree/bindings/vendor-prefixes.txt1
-rw-r--r--drivers/regulator/fan53555.c102
3 files changed, 89 insertions, 16 deletions
diff --git a/Documentation/devicetree/bindings/regulator/fan53555.txt b/Documentation/devicetree/bindings/regulator/fan53555.txt
index b183738d6ca9..54a3f2c80e3a 100644
--- a/Documentation/devicetree/bindings/regulator/fan53555.txt
+++ b/Documentation/devicetree/bindings/regulator/fan53555.txt
@@ -1,7 +1,7 @@
Binding for Fairchild FAN53555 regulators
Required properties:
- - compatible: "fcs,fan53555"
+ - compatible: one of "fcs,fan53555", "silergy,syr827", "silergy,syr828"
- reg: I2C address
Optional properties:
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index 24b92b31f2b5..6073e76575ea 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -125,6 +125,7 @@ sil Silicon Image
silabs Silicon Laboratories
simtek
sii Seiko Instruments, Inc.
+silergy Silergy Corp.
sirf SiRF Technology, Inc.
smsc Standard Microsystems Corporation
snps Synopsys, Inc.
diff --git a/drivers/regulator/fan53555.c b/drivers/regulator/fan53555.c
index fa29ba052841..f2f5535099a0 100644
--- a/drivers/regulator/fan53555.c
+++ b/drivers/regulator/fan53555.c
@@ -52,6 +52,11 @@
#define FAN53555_NVOLTAGES 64 /* Numbers of voltages */
+enum fan53555_vendor {
+ FAN53555_VENDOR_FAIRCHILD = 0,
+ FAN53555_VENDOR_SILERGY,
+};
+
/* IC Type */
enum {
FAN53555_CHIP_ID_00 = 0,
@@ -62,7 +67,12 @@ enum {
FAN53555_CHIP_ID_05,
};
+enum {
+ SILERGY_SYR82X = 8,
+};
+
struct fan53555_device_info {
+ enum fan53555_vendor vendor;
struct regmap *regmap;
struct device *dev;
struct regulator_desc desc;
@@ -183,6 +193,47 @@ static struct regulator_ops fan53555_regulator_ops = {
.set_ramp_delay = fan53555_set_ramp,
};
+static int fan53555_voltages_setup_fairchild(struct fan53555_device_info *di)
+{
+ /* Init voltage range and step */
+ switch (di->chip_id) {
+ case FAN53555_CHIP_ID_00:
+ case FAN53555_CHIP_ID_01:
+ case FAN53555_CHIP_ID_03:
+ case FAN53555_CHIP_ID_05:
+ di->vsel_min = 600000;
+ di->vsel_step = 10000;
+ break;
+ case FAN53555_CHIP_ID_04:
+ di->vsel_min = 603000;
+ di->vsel_step = 12826;
+ break;
+ default:
+ dev_err(di->dev,
+ "Chip ID %d not supported!\n", di->chip_id);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int fan53555_voltages_setup_silergy(struct fan53555_device_info *di)
+{
+ /* Init voltage range and step */
+ switch (di->chip_id) {
+ case SILERGY_SYR82X:
+ di->vsel_min = 712500;
+ di->vsel_step = 12500;
+ break;
+ default:
+ dev_err(di->dev,
+ "Chip ID %d not supported!\n", di->chip_id);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
/* For 00,01,03,05 options:
* VOUT = 0.60V + NSELx * 10mV, from 0.60 to 1.23V.
* For 04 option:
@@ -191,6 +242,8 @@ static struct regulator_ops fan53555_regulator_ops = {
static int fan53555_device_setup(struct fan53555_device_info *di,
struct fan53555_platform_data *pdata)
{
+ int ret = 0;
+
/* Setup voltage control register */
switch (pdata->sleep_vsel_id) {
case FAN53555_VSEL_ID_0:
@@ -205,26 +258,21 @@ static int fan53555_device_setup(struct fan53555_device_info *di,
dev_err(di->dev, "Invalid VSEL ID!\n");
return -EINVAL;
}
- /* Init voltage range and step */
- switch (di->chip_id) {
- case FAN53555_CHIP_ID_00:
- case FAN53555_CHIP_ID_01:
- case FAN53555_CHIP_ID_03:
- case FAN53555_CHIP_ID_05:
- di->vsel_min = 600000;
- di->vsel_step = 10000;
+
+ switch (di->vendor) {
+ case FAN53555_VENDOR_FAIRCHILD:
+ ret = fan53555_voltages_setup_fairchild(di);
break;
- case FAN53555_CHIP_ID_04:
- di->vsel_min = 603000;
- di->vsel_step = 12826;
+ case FAN53555_VENDOR_SILERGY:
+ ret = fan53555_voltages_setup_silergy(di);
break;
default:
dev_err(di->dev,
- "Chip ID[%d]\n not supported!\n", di->chip_id);
+ "vendor %d not supported!\n", di->chip_id);
return -EINVAL;
}
- return 0;
+ return ret;
}
static int fan53555_regulator_register(struct fan53555_device_info *di,
@@ -278,6 +326,13 @@ static struct fan53555_platform_data *fan53555_parse_dt(struct device *dev,
static const struct of_device_id fan53555_dt_ids[] = {
{
.compatible = "fcs,fan53555",
+ .data = (void *)FAN53555_VENDOR_FAIRCHILD
+ }, {
+ .compatible = "silergy,syr827",
+ .data = (void *)FAN53555_VENDOR_SILERGY,
+ }, {
+ .compatible = "silergy,syr828",
+ .data = (void *)FAN53555_VENDOR_SILERGY,
},
{ }
};
@@ -307,7 +362,16 @@ static int fan53555_regulator_probe(struct i2c_client *client,
if (!di)
return -ENOMEM;
- if (!client->dev.of_node) {
+ if (client->dev.of_node) {
+ const struct of_device_id *match;
+
+ match = of_match_device(of_match_ptr(fan53555_dt_ids),
+ &client->dev);
+ if (!match)
+ return -ENODEV;
+
+ di->vendor = (int) match->data;
+ } else {
/* if no ramp constraint set, get the pdata ramp_delay */
if (!di->regulator->constraints.ramp_delay) {
int slew_idx = (pdata->slew_rate & 0x7)
@@ -316,6 +380,8 @@ static int fan53555_regulator_probe(struct i2c_client *client,
di->regulator->constraints.ramp_delay
= slew_rates[slew_idx];
}
+
+ di->vendor = id->driver_data;
}
di->regmap = devm_regmap_init_i2c(client, &fan53555_regmap_config);
@@ -363,7 +429,13 @@ static int fan53555_regulator_probe(struct i2c_client *client,
}
static const struct i2c_device_id fan53555_id[] = {
- {"fan53555", -1},
+ {
+ .name = "fan53555",
+ .driver_data = FAN53555_VENDOR_FAIRCHILD
+ }, {
+ .name = "syr82x",
+ .driver_data = FAN53555_VENDOR_SILERGY
+ },
{ },
};