linux-kernel - Re: [PATCH v4] mfd: mt6360: add pmic mt6360 driver

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Date:   Thu, 24 Oct 2019 09:29:28 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Gene Chen <gene.chen.richtek@...il.com>
Cc:     matthias.bgg@...il.com, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        gene_chen@...htek.com, Wilma.Wu@...iatek.com,
        shufan_lee@...htek.com, cy_huang@...htek.com
Subject: Re: [PATCH v4] mfd: mt6360: add pmic mt6360 driver

On Tue, 22 Oct 2019, Gene Chen wrote:

> From: Gene Chen <gene_chen@...htek.com>
> 
> Add mfd driver for mt6360 pmic chip include
> Battery Charger/USB_PD/Flash LED/RGB LED/LDO/Buck
> 
> Signed-off-by: Gene Chen <gene_chen@...htek.com
> ---
>  drivers/mfd/Kconfig                |  12 +
>  drivers/mfd/Makefile               |   1 +
>  drivers/mfd/mt6360-core.c          | 457 +++++++++++++++++++++++++++++++++++++
>  include/linux/mfd/mt6360-private.h | 279 ++++++++++++++++++++++
>  include/linux/mfd/mt6360.h         |  32 +++
>  5 files changed, 781 insertions(+)
>  create mode 100644 drivers/mfd/mt6360-core.c
>  create mode 100644 include/linux/mfd/mt6360-private.h
>  create mode 100644 include/linux/mfd/mt6360.h
> 
> changelogs between v1 & v2
> - include missing header file
> 
> changelogs between v2 & v3
> - add changelogs
> 
> changelogs between v3 & v4
> - fix Kconfig description
> - replace mt6360_pmu_info with mt6360_pmu_data
> - replace probe with probe_new
> - remove unnecessary irq_chip variable
> - remove annotation
> - replace MT6360_MFD_CELL with OF_MFD_CELL

[...]

> +/* IRQ definitions */
> +struct mt6360_pmu_irq_desc {
> +	const char *name;
> +	irq_handler_t irq_handler;
> +};
> +
> +#define  MT6360_DT_VALPROP(name, type) \
> +			{#name, offsetof(type, name)}
> +
> +struct mt6360_val_prop {
> +	const char *name;
> +	size_t offset;
> +};
> +
> +static inline void mt6360_dt_parser_helper(struct device_node *np, void *data,
> +					   const struct mt6360_val_prop *props,
> +					   int prop_cnt)
> +{
> +	int i;
> +
> +	for (i = 0; i < prop_cnt; i++) {
> +		if (unlikely(!props[i].name))
> +			continue;
> +		of_property_read_u32(np, props[i].name, data + props[i].offset);
> +	}
> +}
> +
> +#define MT6360_PDATA_VALPROP(name, type, reg, shift, mask, func, base) \
> +			{offsetof(type, name), reg, shift, mask, func, base}
> +
> +struct mt6360_pdata_prop {
> +	size_t offset;
> +	u8 reg;
> +	u8 shift;
> +	u8 mask;
> +	u32 (*transform)(u32 val);
> +	u8 base;
> +};
> +
> +static inline int mt6360_pdata_apply_helper(void *context, void *pdata,
> +					   const struct mt6360_pdata_prop *prop,
> +					   int prop_cnt)
> +{
> +	int i, ret;
> +	u32 val;
> +
> +	for (i = 0; i < prop_cnt; i++) {
> +		val = *(u32 *)(pdata + prop[i].offset);
> +		if (prop[i].transform)
> +			val = prop[i].transform(val);
> +		val += prop[i].base;
> +		ret = regmap_update_bits(context,
> +			     prop[i].reg, prop[i].mask, val << prop[i].shift);
> +		if (ret < 0)
> +			return ret;
> +	}
> +	return 0;
> +}

Where are these helpers used?

Are they generic?

Why are they helpful to you, but not helpful to anyone else?

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