[PATCH v3 2/4] mfd: simple-mfd-i2c: Adds Ampere's Altra SMpro support

Quan Nguyen
2021-04-09T03:14:20Z

Adds an MFD driver for SMpro found on the Mt.Jade hardware reference
platform with Ampere's Altra processor family.

Signed-off-by: Quan Nguyen <quan@os.amperecomputing.com>
---
drivers/mfd/Kconfig | 10 ++++++++++
drivers/mfd/simple-mfd-i2c.c | 6 ++++++
2 files changed, 16 insertions(+)

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index d07e8cf93286..f7a6460f7aa0 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -77,6 +77,16 @@ config MFD_AS3711
help
Support for the AS3711 PMIC from AMS

+config MFD_SMPRO
+ tristate "Ampere Computing MFD SMpro core driver"
+ select MFD_SIMPLE_MFD_I2C
+ help
+ Say yes here to enable SMpro driver support for Ampere's Altra
+ processor family.
+
+ Ampere's Altra SMpro exposes an I2C regmap interface that can
+ be accessed by child devices.
+
config MFD_AS3722
tristate "ams AS3722 Power Management IC"
select MFD_CORE
diff --git a/drivers/mfd/simple-mfd-i2c.c b/drivers/mfd/simple-mfd-i2c.c
index 87f684cff9a1..9a44655f5592 100644
--- a/drivers/mfd/simple-mfd-i2c.c
+++ b/drivers/mfd/simple-mfd-i2c.c
@@ -21,6 +21,11 @@ static const struct regmap_config simple_regmap_config = {
.val_bits = 8,
};

+static const struct regmap_config simple_word_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 16,
+};
+
static int simple_mfd_i2c_probe(struct i2c_client *i2c)
{
const struct regmap_config *config;
@@ -39,6 +44,7 @@ static int simple_mfd_i2c_probe(struct i2c_client *i2c)

static const struct of_device_id simple_mfd_i2c_of_match[] = {
{ .compatible = "kontron,sl28cpld" },
+ { .compatible = "ampere,smpro", .data = &simple_word_regmap_config },
{}
};
MODULE_DEVICE_TABLE(of, simple_mfd_i2c_of_match);
--
2.28.0