[PATCH 08/12] regulator: arizona-micsupp: Support Cirrus Logic CS48L31/32/33

[Richard Fitzgerald]

This adds a new driver identity "cs48l32-micsupp" and probe function
so that this driver can be used to control the micsupp regulator on
Cirrus Logic CS48L31/32/33 audio codecs.

Signed-off-by: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
---
 drivers/regulator/Kconfig           |  8 ++--
 drivers/regulator/arizona-micsupp.c | 58 +++++++++++++++++++++++++++++
 2 files changed, 62 insertions(+), 4 deletions(-)

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 070e4403c6c2..1d6813b24f85 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -139,12 +139,12 @@ config REGULATOR_ARIZONA_LDO1
 
 config REGULATOR_ARIZONA_MICSUPP
 	tristate "Cirrus Madera and Wolfson Arizona class devices MICSUPP"
-	depends on MFD_ARIZONA || MFD_MADERA
+	depends on MFD_ARIZONA || MFD_MADERA || MFD_CS48L32
 	depends on SND_SOC
 	help
-	  Support for the MICSUPP regulators found on Cirrus Logic Madera codecs
-	  and Wolfson Microelectronic Arizona codecs
-	  devices.
+	  Support for the MICSUPP regulators found on Cirrus Logic Madera,
+	  Cirrus Logic CS48L31/32/33, and on Wolfson Microelectronic
+	  Arizona codecs.
 
 config REGULATOR_ARM_SCMI
 	tristate "SCMI based regulator driver"
diff --git a/drivers/regulator/arizona-micsupp.c b/drivers/regulator/arizona-micsupp.c
index 596ecd8041cd..bf154067ed34 100644
--- a/drivers/regulator/arizona-micsupp.c
+++ b/drivers/regulator/arizona-micsupp.c
@@ -24,6 +24,9 @@
 #include <linux/mfd/arizona/pdata.h>
 #include <linux/mfd/arizona/registers.h>
 
+#include <linux/mfd/cs48l32/core.h>
+#include <linux/mfd/cs48l32/registers.h>
+
 #include <linux/mfd/madera/core.h>
 #include <linux/mfd/madera/pdata.h>
 #include <linux/mfd/madera/registers.h>
@@ -225,6 +228,28 @@ static const struct regulator_desc madera_micsupp = {
 	.owner = THIS_MODULE,
 };
 
+static const struct regulator_desc cs48l32_micsupp = {
+	.name = "VOUT_MIC",
+	.supply_name = "VDD_CP",
+	.type = REGULATOR_VOLTAGE,
+	.n_voltages = 40,
+	.ops = &arizona_micsupp_ops,
+
+	.vsel_reg = CS48L32_LDO2_CTRL1,
+	.vsel_mask = CS48L32_LDO2_VSEL_MASK,
+	.enable_reg = CS48L32_CHARGE_PUMP1,
+	.enable_mask = CS48L32_CP2_EN_MASK,
+	.bypass_reg = CS48L32_CHARGE_PUMP1,
+	.bypass_mask = CS48L32_CP2_BYPASS_MASK,
+
+	.linear_ranges = arizona_micsupp_ext_ranges,
+	.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges),
+
+	.enable_time = 3000,
+
+	.owner = THIS_MODULE,
+};
+
 static int arizona_micsupp_of_get_pdata(struct arizona_micsupp_pdata *pdata,
 					struct regulator_config *config,
 					const struct regulator_desc *desc)
@@ -361,6 +386,29 @@ static int madera_micsupp_probe(struct platform_device *pdev)
 					   &madera->pdata.micvdd);
 }
 
+static int cs48l32_micsupp_probe(struct platform_device *pdev)
+{
+	struct cs48l32_mfd *mfd = dev_get_drvdata(pdev->dev.parent);
+	struct arizona_micsupp *micsupp;
+	struct arizona_micsupp_pdata *pdata;
+
+	micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
+	if (!micsupp)
+		return -ENOMEM;
+
+	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return -ENOMEM;
+
+	micsupp->regmap = mfd->regmap;
+	micsupp->dapm = &mfd->dapm;
+	micsupp->dev = mfd->dev;
+	micsupp->init_data = arizona_micsupp_ext_default;
+	micsupp->supply.supply = "VOUT_MIC";
+
+	return arizona_micsupp_common_init(pdev, micsupp, &cs48l32_micsupp, pdata);
+}
+
 static struct platform_driver arizona_micsupp_driver = {
 	.probe = arizona_micsupp_probe,
 	.driver		= {
@@ -375,9 +423,17 @@ static struct platform_driver madera_micsupp_driver = {
 	},
 };
 
+static struct platform_driver cs48l32_micsupp_driver = {
+	.probe = cs48l32_micsupp_probe,
+	.driver		= {
+		.name	= "cs48l32-micsupp",
+	},
+};
+
 static struct platform_driver * const arizona_micsupp_drivers[] = {
 	&arizona_micsupp_driver,
 	&madera_micsupp_driver,
+	&cs48l32_micsupp_driver,
 };
 
 static int __init arizona_micsupp_init(void)
@@ -396,7 +452,9 @@ module_exit(arizona_micsupp_exit);
 
 /* Module information */
 MODULE_AUTHOR("Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>");
+MODULE_AUTHOR("Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>");
 MODULE_DESCRIPTION("Arizona microphone supply driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:arizona-micsupp");
+MODULE_ALIAS("platform:cs48l32-micsupp");
 MODULE_ALIAS("platform:madera-micsupp");
-- 
2.30.2