linux-kernel - Re: [PATCH v2 2/3] Input: mtk-pmic-keys - Move long press debounce mask to mtk_pmic

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Message-ID: <87k0abdtl1.fsf@baylibre.com>
Date:   Tue, 24 May 2022 14:05:14 +0200
From:   Mattijs Korpershoek <mkorpershoek@...libre.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        dmitry.torokhov@...il.com
Cc:     matthias.bgg@...il.com, angelogioacchino.delregno@...labora.com,
        linux-input@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] Input: mtk-pmic-keys - Move long press debounce
 mask to mtk_pmic_regs

On mar., mai 24, 2022 at 11:35, AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com> wrote:

> As the second and last step of preparation to add support for more
> PMICs in this driver, move the long press debounce mask to struct
> mtk_pmic_regs and use that in mtk_pmic_keys_lp_reset_setup() instead
> of directly using the definition.
>
> While at it, remove the definition for MTK_PMIC_RST_DU_SHIFT as we
> are able to calculate it dynamically and spares us some unnecessary
> new definitions around for future per-PMIC variations of RST_DU_MASK.
>
> Lastly, it was necessary to change the function signature of
> mtk_pmic_keys_lp_reset_setup() to now pass a pointer to the main
> mtk_pmic_regs structure, since that's where the reset debounce
> mask now resides.
>
> This commit brings no functional changes.
>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

Reviewed-by: Mattijs Korpershoek <mkorpershoek@...libre.com>

> ---
>  drivers/input/keyboard/mtk-pmic-keys.c | 15 +++++++++------
>  1 file changed, 9 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/input/keyboard/mtk-pmic-keys.c b/drivers/input/keyboard/mtk-pmic-keys.c
> index 2509a349a173..6404081253ea 100644
> --- a/drivers/input/keyboard/mtk-pmic-keys.c
> +++ b/drivers/input/keyboard/mtk-pmic-keys.c
> @@ -19,7 +19,6 @@
>  #include <linux/regmap.h>
>  
>  #define MTK_PMIC_RST_DU_MASK	GENMASK(9, 8)
> -#define MTK_PMIC_RST_DU_SHIFT	8
>  #define MTK_PMIC_PWRKEY_RST	BIT(6)
>  #define MTK_PMIC_HOMEKEY_RST	BIT(5)
>  
> @@ -48,6 +47,7 @@ struct mtk_pmic_keys_regs {
>  struct mtk_pmic_regs {
>  	const struct mtk_pmic_keys_regs keys_regs[MTK_PMIC_MAX_KEY_COUNT];
>  	u32 pmic_rst_reg;
> +	u32 rst_lprst_mask; /* Long-press reset timeout bitmask */
>  };
>  
>  static const struct mtk_pmic_regs mt6397_regs = {
> @@ -58,6 +58,7 @@ static const struct mtk_pmic_regs mt6397_regs = {
>  		MTK_PMIC_KEYS_REGS(MT6397_OCSTATUS2,
>  		0x10, MT6397_INT_RSV, 0x8, MTK_PMIC_HOMEKEY_RST),
>  	.pmic_rst_reg = MT6397_TOP_RST_MISC,
> +	.rst_lprst_mask = MTK_PMIC_RST_DU_MASK,
>  };
>  
>  static const struct mtk_pmic_regs mt6323_regs = {
> @@ -68,6 +69,7 @@ static const struct mtk_pmic_regs mt6323_regs = {
>  		MTK_PMIC_KEYS_REGS(MT6323_CHRSTATUS,
>  		0x4, MT6323_INT_MISC_CON, 0x8, MTK_PMIC_HOMEKEY_RST),
>  	.pmic_rst_reg = MT6323_TOP_RST_MISC,
> +	.rst_lprst_mask = MTK_PMIC_RST_DU_MASK,
>  };
>  
>  static const struct mtk_pmic_regs mt6358_regs = {
> @@ -80,6 +82,7 @@ static const struct mtk_pmic_regs mt6358_regs = {
>  				   0x8, MT6358_PSC_TOP_INT_CON0, 0xa,
>  				   MTK_PMIC_HOMEKEY_RST),
>  	.pmic_rst_reg = MT6358_TOP_RST_MISC,
> +	.rst_lprst_mask = MTK_PMIC_RST_DU_MASK,
>  };
>  
>  struct mtk_pmic_keys_info {
> @@ -105,7 +108,7 @@ enum mtk_pmic_keys_lp_mode {
>  };
>  
>  static void mtk_pmic_keys_lp_reset_setup(struct mtk_pmic_keys *keys,
> -					 u32 pmic_rst_reg)
> +					 const struct mtk_pmic_regs *regs)
>  {
>  	const struct mtk_pmic_keys_regs *kregs_home, *kregs_pwr;
>  	u32 long_press_mode, long_press_debounce;
> @@ -120,8 +123,8 @@ static void mtk_pmic_keys_lp_reset_setup(struct mtk_pmic_keys *keys,
>  	if (error)
>  		long_press_debounce = 0;
>  
> -	mask = MTK_PMIC_RST_DU_MASK;
> -	value = long_press_debounce << MTK_PMIC_RST_DU_SHIFT;
> +	mask = regs->rst_lprst_mask;
> +	value = long_press_debounce << (ffs(regs->rst_lprst_mask) - 1);
>  
>  	error  = of_property_read_u32(keys->dev->of_node,
>  				      "mediatek,long-press-mode",
> @@ -147,7 +150,7 @@ static void mtk_pmic_keys_lp_reset_setup(struct mtk_pmic_keys *keys,
>  		break;
>  	}
>  
> -	regmap_update_bits(keys->regmap, pmic_rst_reg, mask, value);
> +	regmap_update_bits(keys->regmap, regs->pmic_rst_reg, mask, value);
>  }
>  
>  static irqreturn_t mtk_pmic_keys_irq_handler_thread(int irq, void *data)
> @@ -351,7 +354,7 @@ static int mtk_pmic_keys_probe(struct platform_device *pdev)
>  		return error;
>  	}
>  
> -	mtk_pmic_keys_lp_reset_setup(keys, mtk_pmic_regs->pmic_rst_reg);
> +	mtk_pmic_keys_lp_reset_setup(keys, mtk_pmic_regs);
>  
>  	platform_set_drvdata(pdev, keys);
>  
> -- 
> 2.35.1