linux-kernel - Re: [PATCH V2] nvmem: sc27xx: add sc2730 efuse support

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Message-ID: <3b41564b-f34a-6b31-8142-c3edcc1699e8@linaro.org>
Date:   Tue, 16 Jun 2020 09:30:08 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Chunyan Zhang <zhang.lyra@...il.com>
Cc:     linux-kernel@...r.kernel.org, Orson Zhai <orsonzhai@...il.com>,
        Baolin Wang <baolin.wang7@...il.com>,
        Chunyan Zhang <chunyan.zhang@...soc.com>,
        Freeman Liu <freeman.liu@...soc.com>
Subject: Re: [PATCH V2] nvmem: sc27xx: add sc2730 efuse support



On 16/06/2020 03:05, Chunyan Zhang wrote:
> From: Freeman Liu <freeman.liu@...soc.com>
> 
> Add support to the new efuse IP which is integrated in the SC2730
> which includes multiple blocks in a single chip.
> 
> Signed-off-by: Freeman Liu <freeman.liu@...soc.com>
> Signed-off-by: Chunyan Zhang <chunyan.zhang@...soc.com>
> Reviewed-by: Baolin Wang <baolin.wang7@...il.com>


Applied thanks,

-srini

> ---
> Changes from v1:
> * Addressed comments from Srinivas;
> * Added reviewed-by from Baolin.
> ---
>   drivers/nvmem/sc27xx-efuse.c | 27 ++++++++++++++++++++++++---
>   1 file changed, 24 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/nvmem/sc27xx-efuse.c b/drivers/nvmem/sc27xx-efuse.c
> index ab5e7e0bc3d8..c825fc902d10 100644
> --- a/drivers/nvmem/sc27xx-efuse.c
> +++ b/drivers/nvmem/sc27xx-efuse.c
> @@ -4,12 +4,14 @@
>   #include <linux/hwspinlock.h>
>   #include <linux/module.h>
>   #include <linux/of.h>
> +#include <linux/of_device.h>
>   #include <linux/platform_device.h>
>   #include <linux/regmap.h>
>   #include <linux/nvmem-provider.h>
>   
>   /* PMIC global registers definition */
>   #define SC27XX_MODULE_EN		0xc08
> +#define SC2730_MODULE_EN		0x1808
>   #define SC27XX_EFUSE_EN			BIT(6)
>   
>   /* Efuse controller registers definition */
> @@ -49,12 +51,29 @@
>   #define SC27XX_EFUSE_POLL_TIMEOUT	3000000
>   #define SC27XX_EFUSE_POLL_DELAY_US	10000
>   
> +/*
> + * Since different PMICs of SC27xx series can have different
> + * address , we should save address in the device data structure.
> + */
> +struct sc27xx_efuse_variant_data {
> +	u32 module_en;
> +};
> +
>   struct sc27xx_efuse {
>   	struct device *dev;
>   	struct regmap *regmap;
>   	struct hwspinlock *hwlock;
>   	struct mutex mutex;
>   	u32 base;
> +	const struct sc27xx_efuse_variant_data *var_data;
> +};
> +
> +static const struct sc27xx_efuse_variant_data sc2731_edata = {
> +	.module_en = SC27XX_MODULE_EN,
> +};
> +
> +static const struct sc27xx_efuse_variant_data sc2730_edata = {
> +	.module_en = SC2730_MODULE_EN,
>   };
>   
>   /*
> @@ -119,7 +138,7 @@ static int sc27xx_efuse_read(void *context, u32 offset, void *val, size_t bytes)
>   		return ret;
>   
>   	/* Enable the efuse controller. */
> -	ret = regmap_update_bits(efuse->regmap, SC27XX_MODULE_EN,
> +	ret = regmap_update_bits(efuse->regmap, efuse->var_data->module_en,
>   				 SC27XX_EFUSE_EN, SC27XX_EFUSE_EN);
>   	if (ret)
>   		goto unlock_efuse;
> @@ -169,7 +188,7 @@ static int sc27xx_efuse_read(void *context, u32 offset, void *val, size_t bytes)
>   
>   disable_efuse:
>   	/* Disable the efuse controller after reading. */
> -	regmap_update_bits(efuse->regmap, SC27XX_MODULE_EN, SC27XX_EFUSE_EN, 0);
> +	regmap_update_bits(efuse->regmap, efuse->var_data->module_en, SC27XX_EFUSE_EN, 0);
>   unlock_efuse:
>   	sc27xx_efuse_unlock(efuse);
>   
> @@ -219,6 +238,7 @@ static int sc27xx_efuse_probe(struct platform_device *pdev)
>   
>   	mutex_init(&efuse->mutex);
>   	efuse->dev = &pdev->dev;
> +	efuse->var_data = of_device_get_match_data(&pdev->dev);
>   
>   	econfig.stride = 1;
>   	econfig.word_size = 1;
> @@ -238,7 +258,8 @@ static int sc27xx_efuse_probe(struct platform_device *pdev)
>   }
>   
>   static const struct of_device_id sc27xx_efuse_of_match[] = {
> -	{ .compatible = "sprd,sc2731-efuse" },
> +	{ .compatible = "sprd,sc2731-efuse", .data = &sc2731_edata},
> +	{ .compatible = "sprd,sc2730-efuse", .data = &sc2730_edata},
>   	{ }
>   };
>   
>