Re: [PATCH 7/7] mfd: cros_ec: add RTC as mfd subdevice

Enric Balletbo i Serra
2017-04-03T15:07:46Z

On 03/04/17 16:25, Lee Jones wrote:
> On Fri, 24 Mar 2017, Enric Balletbo i Serra wrote:
>
>> From: Stephen Barber <smbarber@chromium.org>
>>
>> If the EC supports RTC host commands, expose an RTC device.
>>
>> Signed-off-by: Stephen Barber <smbarber@chromium.org>
>> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
>> ---
>> drivers/mfd/cros_ec.c | 18 ++++++++++++++++++
>> 1 file changed, 18 insertions(+)
>>
>> diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
>> index bbc17ab..1ff88b1 100644
>> --- a/drivers/mfd/cros_ec.c
>> +++ b/drivers/mfd/cros_ec.c
>> @@ -51,6 +51,11 @@ static const struct mfd_cell ec_pd_cell = {
>> .pdata_size = sizeof(pd_p),
>> };
>>
>> +static const struct mfd_cell ec_rtc_cell = {
>> + .name = "cros-ec-rtc",
>> + .id = -1,
>
> Why -1?
>
>> +};
>> +
>> static irqreturn_t ec_irq_thread(int irq, void *data)
>> {
>> struct cros_ec_device *ec_dev = data;
>> @@ -238,6 +243,15 @@ static void cros_ec_sensors_register(struct cros_ec_device *ec_dev)
>> kfree(msg);
>> }
>>
>> +static void cros_ec_rtc_register(struct cros_ec_device *ec_dev)
>> +{
>> + int ret;
>> +
>> + ret = mfd_add_devices(ec_dev->dev, 0, &ec_rtc_cell, 1, NULL, 0, NULL);
>
> Why 0?
>

Right, just maintained the one in the original. I think I can use
PLATFORM_DEVID_AUTO here?

>> + if (ret)
>> + dev_err(ec_dev->dev, "failed to add EC RTC\n");
>> +}
>> +
>> int cros_ec_register(struct cros_ec_device *ec_dev)
>> {
>> struct device *dev = ec_dev->dev;
>> @@ -287,6 +301,10 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
>> if (cros_ec_check_features(ec_dev, EC_FEATURE_MOTION_SENSE))
>> cros_ec_sensors_register(ec_dev);
>>
>> + /* Check whether this EC has RTC support */
>> + if (cros_ec_check_features(ec_dev, EC_FEATURE_RTC))
>> + cros_ec_rtc_register(ec_dev);
>> +
>> if (ec_dev->max_passthru) {
>> /*
>> * Register a PD device as well on top of this device.
>