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Nguyen" Subject: Re: [PATCH 2/4] mfd: simple-mfd-i2c: Adds Ampere's Altra SMpro support Message-ID: <20210226083114.GE641347@dell> References: <20210225101854.13896-1-quan@os.amperecomputing.com> <20210225101854.13896-3-quan@os.amperecomputing.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20210225101854.13896-3-quan@os.amperecomputing.com> Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On Thu, 25 Feb 2021, Quan Nguyen wrote: > 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 > --- > drivers/mfd/Kconfig | 10 ++++++++++ > drivers/mfd/simple-mfd-i2c.c | 15 +++++++++++++-- > 2 files changed, 23 insertions(+), 2 deletions(-) > > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig > index b74efa469e90..5414371bdea1 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 Nice to see another user here. > + 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..0459a9fbd3f5 100644 > --- a/drivers/mfd/simple-mfd-i2c.c > +++ b/drivers/mfd/simple-mfd-i2c.c > @@ -21,14 +21,24 @@ 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; > struct regmap *regmap; > > config = device_get_match_data(&i2c->dev); > - if (!config) > - config = &simple_regmap_config; > + if (!config) { > + if (of_device_is_compatible(i2c->dev.of_node, > + "ampere,ac01-smpro")) Could you use 'struct of_device_id's .data attribute instead please? > + config = &simple_word_regmap_config; > + else > + config = &simple_regmap_config; > + } > > regmap = devm_regmap_init_i2c(i2c, config); > if (IS_ERR(regmap)) > @@ -39,6 +49,7 @@ 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,ac01-smpro" }, > {} > }; > MODULE_DEVICE_TABLE(of, simple_mfd_i2c_of_match); -- Lee Jones [李琼斯] Senior Technical Lead - Developer Services Linaro.org │ Open source software for Arm SoCs Follow Linaro: Facebook | Twitter | Blog