Re: [PATCH v9 3/5] mfd: Add support for the MediaTek MT6358 PMIC

[Nicolas Boichat]

Thanks, much better. Just one issue left.

On Tue, Mar 10, 2020 at 6:10 PM Hsin-Hsiung Wang
<hsin-hsiung.wang@xxxxxxxxxxxx> wrote:
>
> This adds support for the MediaTek MT6358 PMIC. This is a
> multifunction device with the following sub modules:
>
> - Regulator
> - RTC
> - Codec
> - Interrupt
>
> It is interfaced to the host controller using SPI interface
> by a proprietary hardware called PMIC wrapper or pwrap.
> MT6358 MFD is a child device of the pwrap.
>
> Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.wang@xxxxxxxxxxxx>
> ---
>  drivers/mfd/Makefile                 |   2 +-
>  drivers/mfd/mt6358-irq.c             | 238 +++++++++++++++++++++++++++++
>  drivers/mfd/mt6397-core.c            |  55 ++++++-
>  include/linux/mfd/mt6358/core.h      | 158 ++++++++++++++++++++
>  include/linux/mfd/mt6358/registers.h | 282 +++++++++++++++++++++++++++++++++++
>  include/linux/mfd/mt6397/core.h      |   3 +
>  6 files changed, 733 insertions(+), 5 deletions(-)
>  create mode 100644 drivers/mfd/mt6358-irq.c
>  create mode 100644 include/linux/mfd/mt6358/core.h
>  create mode 100644 include/linux/mfd/mt6358/registers.h
>
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index b83f172..9af1414 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -238,7 +238,7 @@ obj-$(CONFIG_INTEL_SOC_PMIC)        += intel-soc-pmic.o
>  obj-$(CONFIG_INTEL_SOC_PMIC_BXTWC)     += intel_soc_pmic_bxtwc.o
>  obj-$(CONFIG_INTEL_SOC_PMIC_CHTWC)     += intel_soc_pmic_chtwc.o
>  obj-$(CONFIG_INTEL_SOC_PMIC_CHTDC_TI)  += intel_soc_pmic_chtdc_ti.o
> -mt6397-objs    := mt6397-core.o mt6397-irq.o
> +mt6397-objs                    := mt6397-core.o mt6397-irq.o mt6358-irq.o
>  obj-$(CONFIG_MFD_MT6397)       += mt6397.o
>  obj-$(CONFIG_INTEL_SOC_PMIC_MRFLD)     += intel_soc_pmic_mrfld.o
>
> diff --git a/drivers/mfd/mt6358-irq.c b/drivers/mfd/mt6358-irq.c
> new file mode 100644
> index 0000000..0b99a39
> --- /dev/null
> +++ b/drivers/mfd/mt6358-irq.c
> @@ -0,0 +1,238 @@
> [snip]
> +static irqreturn_t mt6358_irq_handler(int irq, void *data)
> +{
> +       struct mt6397_chip *chip = data;
> +       struct pmic_irq_data *mt6358_irq_data = chip->irq_data;
> +       unsigned int bit, i, top_irq_status;
> +       int ret;
> +
> +       ret = regmap_read(chip->regmap,
> +                         mt6358_irq_data->top_int_status_reg,
> +                         &top_irq_status);
> +       if (ret) {
> +               dev_err(chip->dev,
> +                       "Failed to read status from the device, ret=%d\n", ret);
> +               return IRQ_NONE;
> +       }
> +
> +       for (i = 0; i < mt6358_irq_data->num_top; i++) {
> +               for (i = 0; i < mt6358_irq_data->num_top; i++) {

Only one loop needed.

> +                       bit = BIT(mt6358_ints[i].top_offset);
> +                       if (top_irq_status & bit) {
> +                               mt6358_irq_sp_handler(chip, i);
> +                               top_irq_status &= ~bit;
> +                               if (!top_irq_status)
> +                                       break;
> +                       }
> +               }
> +       }
> +
> +       return IRQ_HANDLED;
> +}
> +
> +static int pmic_irq_domain_map(struct irq_domain *d, unsigned int irq,
> +                              irq_hw_number_t hw)
> +{
> +       struct mt6397_chip *mt6397 = d->host_data;
> +
> +       irq_set_chip_data(irq, mt6397);
> +       irq_set_chip_and_handler(irq, &mt6358_irq_chip, handle_level_irq);
> +       irq_set_nested_thread(irq, 1);
> +       irq_set_noprobe(irq);
> +
> +       return 0;
> +}
> [snip]