Thanks Marek,
On 23 May 2018 12:42 Marek Vasut wrote,
> To: linux-kernel@xxxxxxxxxxxxxxx
> Cc: Marek Vasut <marek.vasut+renesas@xxxxxxxxx>; Geert Uytterhoeven <geert+renesas@xxxxxxxxx>; Lee Jones <lee.jones@xxxxxxxxxx>; Mark Brown <broonie@xxxxxxxxxx>; Steve Twiss <stwiss.opensource@xxxxxxxxxxx>; Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>; linux-renesas-soc@xxxxxxxxxxxxxxx
> Subject: [PATCH 4/6] mfd: da9063: Disallow RTC on DA9063L
>
> The DA9063L does not contain RTC block, unlike the full DA9063.
> Do not allow binding RTC driver on this variant of the chip.
>
> Signed-off-by: Marek Vasut <marek.vasut+renesas@xxxxxxxxx>
> Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> Cc: Lee Jones <lee.jones@xxxxxxxxxx>
> Cc: Mark Brown <broonie@xxxxxxxxxx>
> Cc: Steve Twiss <stwiss.opensource@xxxxxxxxxxx>
> Cc: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
> Cc: linux-renesas-soc@xxxxxxxxxxxxxxx
> ---
> drivers/mfd/da9063-core.c | 18 +++++++++++-------
> 1 file changed, 11 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/mfd/da9063-core.c b/drivers/mfd/da9063-core.c index 7360b76b4f72..263c83006413 100644
> --- a/drivers/mfd/da9063-core.c
> +++ b/drivers/mfd/da9063-core.c
> @@ -101,14 +101,14 @@ static const struct mfd_cell da9063_devs[] = {
> .of_compatible = "dlg,da9063-onkey",
> },
> {
> + .name = DA9063_DRVNAME_VIBRATION,
> + },
> + { /* Only present on DA9063 , not on DA9063L */
> .name = DA9063_DRVNAME_RTC,
> .num_resources = ARRAY_SIZE(da9063_rtc_resources),
> .resources = da9063_rtc_resources,
> .of_compatible = "dlg,da9063-rtc",
> },
> - {
> - .name = DA9063_DRVNAME_VIBRATION,
> - },
> };
>
> static int da9063_clear_fault_log(struct da9063 *da9063) @@ -163,7 +163,7 @@ int da9063_device_init(struct da9063 *da9063, unsigned int irq) {
> struct da9063_pdata *pdata = da9063->dev->platform_data;
> int model, variant_id, variant_code;
> - int ret;
> + int da9063_devs_len, ret;
>
> ret = da9063_clear_fault_log(da9063);
> if (ret < 0)
> @@ -225,9 +225,13 @@ int da9063_device_init(struct da9063 *da9063, unsigned int irq)
>
> da9063->irq_base = regmap_irq_chip_get_base(da9063->regmap_irq);
>
> - ret = mfd_add_devices(da9063->dev, -1, da9063_devs,
> - ARRAY_SIZE(da9063_devs), NULL, da9063->irq_base,
> - NULL);
> + da9063_devs_len = ARRAY_SIZE(da9063_devs);
> + /* RTC, the last device in the list, is only present on DA9063 */
> + if (da9063->type == PMIC_TYPE_DA9063L)
> + da9063_devs_len -= 1;
> +
> + ret = mfd_add_devices(da9063->dev, -1, da9063_devs, da9063_devs_len,
> + NULL, da9063->irq_base, NULL);
> if (ret)
> dev_err(da9063->dev, "Cannot add MFD cells\n");
>
> --
> 2.16.2
MFD cells definitely has less impact than regmap_range and regmap_irq.
I agree, there's no point in having a completely new
static const struct mfd_cell da9063l_devs[] = { ... } for DA9063L
Acked-by: Steve Twiss <stwiss.opensource@xxxxxxxxxxx>
Regards,
Steve
