linux-kernel - Re: [PATCH V4 2/8] soc: mediatek: pwrap: add caps flag for pwrap

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Date:   Wed, 2 May 2018 12:27:26 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     argus.lin@...iatek.com, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>
Cc:     Chenglin Xu <chenglin.xu@...iatek.com>,
        Sean Wang <sean.wang@...iatek.com>, wsd_upstream@...iatek.com,
        henryc.chen@...iatek.com, flora.fu@...iatek.com,
        Chen Zhong <chen.zhong@...iatek.com>,
        Christophe Jaillet <christophe.jaillet@...adoo.fr>,
        "shailendra . v" <shailendra.v@...sung.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH V4 2/8] soc: mediatek: pwrap: add caps flag for pwrap



On 05/02/2018 11:21 AM, argus.lin@...iatek.com wrote:
> From: Argus Lin <argus.lin@...iatek.com>
> 
> We use caps to describe pwrap's capability, used
> to replace has_bridge flag for single meaning.
> 
> Signed-off-by: Argus Lin <argus.lin@...iatek.com>
> ---
>  drivers/soc/mediatek/mtk-pmic-wrap.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c
> index e9e054a15b7d..3a25ff6e6907 100644
> --- a/drivers/soc/mediatek/mtk-pmic-wrap.c
> +++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
> @@ -76,6 +76,12 @@
>  #define PWRAP_SLV_CAP_SECURITY	BIT(2)
>  #define HAS_CAP(_c, _x)	(((_c) & (_x)) == (_x))
>  
> +/* Group of bits used for shown pwrap capability */
> +#define PWRAP_CAP_BRIDGE	BIT(0)
> +#define PWRAP_CAP_RESET		BIT(1)
> +#define PWRAP_CAP_DCM		BIT(2)
> +#define PWRAP_CAP_INT1_EN	BIT(3)
> +

You are missing the logic to handle the caps.
With out this logic, this patch is useless.

Regards,
Matthias

>  /* defines for slave device wrapper registers */
>  enum dew_regs {
>  	PWRAP_DEW_BASE,
> @@ -684,6 +690,8 @@ struct pmic_wrapper_type {
>  	u32 spi_w;
>  	u32 wdt_src;
>  	unsigned int has_bridge:1;
> +	/* Flags indicating the capability for the target pwrap */
> +	u8 caps;
>  	int (*init_reg_clock)(struct pmic_wrapper *wrp);
>  	int (*init_soc_specific)(struct pmic_wrapper *wrp);
>  };
> @@ -1394,6 +1402,7 @@ static const struct pmic_wrapper_type pwrap_mt2701 = {
>  	.spi_w = PWRAP_MAN_CMD_SPI_WRITE_NEW,
>  	.wdt_src = PWRAP_WDT_SRC_MASK_ALL,
>  	.has_bridge = 0,
> +	.caps = PWRAP_CAP_RESET | PWRAP_CAP_DCM,
>  	.init_reg_clock = pwrap_mt2701_init_reg_clock,
>  	.init_soc_specific = pwrap_mt2701_init_soc_specific,
>  };
> @@ -1406,6 +1415,7 @@ static const struct pmic_wrapper_type pwrap_mt7622 = {
>  	.spi_w = PWRAP_MAN_CMD_SPI_WRITE,
>  	.wdt_src = PWRAP_WDT_SRC_MASK_ALL,
>  	.has_bridge = 0,
> +	.caps = PWRAP_CAP_RESET | PWRAP_CAP_DCM,
>  	.init_reg_clock = pwrap_common_init_reg_clock,
>  	.init_soc_specific = pwrap_mt7622_init_soc_specific,
>  };
> @@ -1418,6 +1428,7 @@ static const struct pmic_wrapper_type pwrap_mt8135 = {
>  	.spi_w = PWRAP_MAN_CMD_SPI_WRITE,
>  	.wdt_src = PWRAP_WDT_SRC_MASK_ALL,
>  	.has_bridge = 1,
> +	.caps = PWRAP_CAP_BRIDGE | PWRAP_CAP_RESET | PWRAP_CAP_DCM,
>  	.init_reg_clock = pwrap_common_init_reg_clock,
>  	.init_soc_specific = pwrap_mt8135_init_soc_specific,
>  };
> -- 
> 2.12.5
> 
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