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SubjectRe: [PATCH v4 4/5] mfd: rn5t618: add more subdevices
On Wed, 11 Dec 2019, Andreas Kemnade wrote:

> The RC5T619 has a RTC which is missing in the
> RN5T618. Add it as subdevice to prepare for their implementation
>
> Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
> ---
> Changes in v3:
> - alignment cleanup
> drivers/mfd/rn5t618.c | 16 ++++++++++++++--
> 1 file changed, 14 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mfd/rn5t618.c b/drivers/mfd/rn5t618.c
> index d78eb29b94a4..18d56a732b20 100644
> --- a/drivers/mfd/rn5t618.c
> +++ b/drivers/mfd/rn5t618.c
> @@ -22,6 +22,12 @@ static const struct mfd_cell rn5t618_cells[] = {
> { .name = "rn5t618-wdt" },
> };
>
> +static const struct mfd_cell rc5t619_cells[] = {
> + { .name = "rn5t618-regulator" },
> + { .name = "rc5t619-rtc" },
> + { .name = "rn5t618-wdt" },
> +};
> +
> static bool rn5t618_volatile_reg(struct device *dev, unsigned int reg)
> {
> switch (reg) {
> @@ -173,8 +179,14 @@ static int rn5t618_i2c_probe(struct i2c_client *i2c,
> return ret;
> }
>
> - ret = devm_mfd_add_devices(&i2c->dev, -1, rn5t618_cells,
> - ARRAY_SIZE(rn5t618_cells), NULL, 0, NULL);
> + if (priv->variant == RC5T619)
> + ret = devm_mfd_add_devices(&i2c->dev, -1, rc5t619_cells,

Ref: The "-1", please use this as an opportunity to use the defines.

> + ARRAY_SIZE(rc5t619_cells),
> + NULL, 0, NULL);
> + else

Are you sure it's not possible for 'variant' to be an unsupported
device?

> + ret = devm_mfd_add_devices(&i2c->dev, -1, rn5t618_cells,
> + ARRAY_SIZE(rn5t618_cells),
> + NULL, 0, NULL);
> if (ret) {
> dev_err(&i2c->dev, "failed to add sub-devices: %d\n", ret);
> return ret;

--
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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