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

[Quan Nguyen <quan@os.amperecomputing.com>]

On 14/04/2021 19:21, Guenter Roeck wrote:
> On Fri, Apr 09, 2021 at 10:13:30AM +0700, 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 <quan@os.amperecomputing.com>
>> Reported-by: kernel test robot <lkp@intel.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
> 
> This is missing "depends on I2C".
> 
Thanks Guenter to help pointing this out.
This fixes the issue reported by kernel test robot. Will include this in 
next version.

>> +	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);