linux-kernel - Re: [PATCH v2 2/3] rtc: s5m: Add separate field for storing auto-cleared mask in register config

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Date:	Wed, 30 Dec 2015 15:39:04 +0530
From:	Alim Akhtar <alim.akhtar@...sung.com>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Sangbeom Kim <sbkim73@...sung.com>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Lee Jones <lee.jones@...aro.org>, linux-kernel@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org, rtc-linux@...glegroups.com
Cc:	Yadwinder Singh Brar <yadi.brar01@...il.com>
Subject: Re: [PATCH v2 2/3] rtc: s5m: Add separate field for storing
 auto-cleared mask in register config

Hi Krzysztof,


On 12/30/2015 10:17 AM, Krzysztof Kozlowski wrote:
> Some devices from S2M/S5M family use different register update masks for
> different operations (alarm and register update). Now the driver uses
> common register configuration and a lot of exceptions per device in code.
>
> Before eliminating the exceptions and using specific register
> configuration for given device, make the auto-cleared mask a separate
> field. This is merely a refactoring.
>
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
>

Tested for s2mps15 pmic on exynos7-espresso board. Works well.
Fill free to add
Reviewed-by: Alim Akhtar <alim.akhtar@...sung.com>
Tested-by: Alim Akhtar <alim.akhtar@...sung.com>
> ---
>
> Changes since v1:
> 1. None.
> ---
>   drivers/rtc/rtc-s5m.c | 6 +++++-
>   1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/rtc/rtc-s5m.c b/drivers/rtc/rtc-s5m.c
> index 85649861a6b0..559db8f72117 100644
> --- a/drivers/rtc/rtc-s5m.c
> +++ b/drivers/rtc/rtc-s5m.c
> @@ -56,6 +56,8 @@ struct s5m_rtc_reg_config {
>   	 * auto-cleared after successful update.
>   	 */
>   	unsigned int udr_update;
> +	/* Auto-cleared mask in UDR field for writing time and alarm */
> +	unsigned int autoclear_udr_mask;
>   	/* Mask for UDR field in 'udr_update' register */
>   	unsigned int udr_mask;
>   };
> @@ -68,6 +70,7 @@ static const struct s5m_rtc_reg_config s5m_rtc_regs = {
>   	.alarm0			= S5M_ALARM0_SEC,
>   	.alarm1			= S5M_ALARM1_SEC,
>   	.udr_update		= S5M_RTC_UDR_CON,
> +	.autoclear_udr_mask	= S5M_RTC_UDR_MASK,
>   	.udr_mask		= S5M_RTC_UDR_MASK,
>   };
>
> @@ -82,6 +85,7 @@ static const struct s5m_rtc_reg_config s2mps_rtc_regs = {
>   	.alarm0			= S2MPS_ALARM0_SEC,
>   	.alarm1			= S2MPS_ALARM1_SEC,
>   	.udr_update		= S2MPS_RTC_UDR_CON,
> +	.autoclear_udr_mask	= S2MPS_RTC_WUDR_MASK,
>   	.udr_mask		= S2MPS_RTC_WUDR_MASK,
>   };
>
> @@ -167,7 +171,7 @@ static inline int s5m8767_wait_for_udr_update(struct s5m_rtc_info *info)
>
>   	do {
>   		ret = regmap_read(info->regmap, info->regs->udr_update, &data);
> -	} while (--retry && (data & info->regs->udr_mask) && !ret);
> +	} while (--retry && (data & info->regs->autoclear_udr_mask) && !ret);
>
>   	if (!retry)
>   		dev_err(info->dev, "waiting for UDR update, reached max number of retries\n");
>
--
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