linux-kernel - Re: [PATCH v3 04/14] rtc: pcf2127: adapt for WD registers at any offset

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Date:   Sat, 7 Jan 2023 17:59:38 +0100
From:   Bruno Thomsen <bruno.thomsen@...il.com>
To:     Hugo Villeneuve <hugo@...ovil.com>
Cc:     a.zummo@...ertech.it, alexandre.belloni@...tlin.com,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        linux-rtc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Hugo Villeneuve <hvilleneuve@...onoff.com>
Subject: Re: [PATCH v3 04/14] rtc: pcf2127: adapt for WD registers at any offset

Den tor. 15. dec. 2022 kl. 16.19 skrev Hugo Villeneuve <hugo@...ovil.com>:
>
> From: Hugo Villeneuve <hvilleneuve@...onoff.com>
>
> This will simplify the implementation of new variants into this driver.
>
> Signed-off-by: Hugo Villeneuve <hvilleneuve@...onoff.com>

Reviewed-by: Bruno Thomsen <bruno.thomsen@...il.com>
Tested-by: Bruno Thomsen <bruno.thomsen@...il.com>

> ---
>  drivers/rtc/rtc-pcf2127.c | 14 ++++++++++----
>  1 file changed, 10 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/rtc/rtc-pcf2127.c b/drivers/rtc/rtc-pcf2127.c
> index db0cb784c0c9..5d8c06e32dce 100644
> --- a/drivers/rtc/rtc-pcf2127.c
> +++ b/drivers/rtc/rtc-pcf2127.c
> @@ -114,6 +114,8 @@ struct pcf21xx_config {
>         unsigned int has_bit_wd_ctl_cd0:1;
>         u8 regs_td_base; /* Time/data base registers. */
>         u8 regs_alarm_base; /* Alarm function base registers. */
> +       u8 reg_wd_ctl; /* Watchdog control register. */
> +       u8 reg_wd_val; /* Watchdog value register. */
>  };
>
>  struct pcf2127 {
> @@ -297,7 +299,7 @@ static int pcf2127_wdt_ping(struct watchdog_device *wdd)
>  {
>         struct pcf2127 *pcf2127 = watchdog_get_drvdata(wdd);
>
> -       return regmap_write(pcf2127->regmap, PCF2127_REG_WD_VAL, wdd->timeout);
> +       return regmap_write(pcf2127->regmap, pcf2127->cfg->reg_wd_val, wdd->timeout);
>  }
>
>  /*
> @@ -331,7 +333,7 @@ static int pcf2127_wdt_stop(struct watchdog_device *wdd)
>  {
>         struct pcf2127 *pcf2127 = watchdog_get_drvdata(wdd);
>
> -       return regmap_write(pcf2127->regmap, PCF2127_REG_WD_VAL,
> +       return regmap_write(pcf2127->regmap, pcf2127->cfg->reg_wd_val,
>                             PCF2127_WD_VAL_STOP);
>  }
>
> @@ -380,7 +382,7 @@ static int pcf2127_watchdog_init(struct device *dev, struct pcf2127 *pcf2127)
>         watchdog_set_drvdata(&pcf2127->wdd, pcf2127);
>
>         /* Test if watchdog timer is started by bootloader */
> -       ret = regmap_read(pcf2127->regmap, PCF2127_REG_WD_VAL, &wdd_timeout);
> +       ret = regmap_read(pcf2127->regmap, pcf2127->cfg->reg_wd_val, &wdd_timeout);
>         if (ret)
>                 return ret;
>
> @@ -664,6 +666,8 @@ static struct pcf21xx_config pcf21xx_cfg[] = {
>                 .has_bit_wd_ctl_cd0 = 1,
>                 .regs_td_base = PCF2127_REG_TIME_DATE_BASE,
>                 .regs_alarm_base = PCF2127_REG_ALARM_BASE,
> +               .reg_wd_ctl = PCF2127_REG_WD_CTL,
> +               .reg_wd_val = PCF2127_REG_WD_VAL,
>         },
>         [PCF2129] = {
>                 .max_register = 0x19,
> @@ -671,6 +675,8 @@ static struct pcf21xx_config pcf21xx_cfg[] = {
>                 .has_bit_wd_ctl_cd0 = 0,
>                 .regs_td_base = PCF2127_REG_TIME_DATE_BASE,
>                 .regs_alarm_base = PCF2127_REG_ALARM_BASE,
> +               .reg_wd_ctl = PCF2127_REG_WD_CTL,
> +               .reg_wd_val = PCF2127_REG_WD_VAL,
>         },
>  };
>
> @@ -772,7 +778,7 @@ static int pcf2127_probe(struct device *dev, struct regmap *regmap,
>          * as T. Bits labeled as T must always be written with
>          * logic 0.
>          */
> -       ret = regmap_update_bits(pcf2127->regmap, PCF2127_REG_WD_CTL,
> +       ret = regmap_update_bits(pcf2127->regmap, pcf2127->cfg->reg_wd_ctl,
>                                  PCF2127_BIT_WD_CTL_CD1 |
>                                  PCF2127_BIT_WD_CTL_CD0 |
>                                  PCF2127_BIT_WD_CTL_TF1 |
> --
> 2.30.2
>