linux-kernel - Re: [PATCH v1 6/7] rtc: s5m: add support for S2MPS16 RTC

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Message-ID: <2025091416350055a27358@mail.local>
Date: Sun, 14 Sep 2025 18:35:00 +0200
From: Alexandre Belloni <alexandre.belloni@...tlin.com>
To: Ivaylo Ivanov <ivo.ivanov.ivanov1@...il.com>
Cc: Krzysztof Kozlowski <krzk@...nel.org>,
	André Draszik <andre.draszik@...aro.org>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Alim Akhtar <alim.akhtar@...sung.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Lee Jones <lee@...nel.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>, linux-samsung-soc@...r.kernel.org,
	devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
	linux-rtc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 6/7] rtc: s5m: add support for S2MPS16 RTC

On 14/09/2025 15:42:26+0300, Ivaylo Ivanov wrote:
> Add support for Samsung's S2MPS16 PMIC RTC, which has pretty much
> identical functionality to the existing S2MPS15 support, with the
> difference being the ST2 register.
> 
> Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@...il.com>
Acked-by: Alexandre Belloni <alexandre.belloni@...tlin.com>

> ---
>  drivers/rtc/rtc-s5m.c | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/drivers/rtc/rtc-s5m.c b/drivers/rtc/rtc-s5m.c
> index a7220b4d0..910248731 100644
> --- a/drivers/rtc/rtc-s5m.c
> +++ b/drivers/rtc/rtc-s5m.c
> @@ -18,6 +18,7 @@
>  #include <linux/mfd/samsung/irq.h>
>  #include <linux/mfd/samsung/rtc.h>
>  #include <linux/mfd/samsung/s2mps14.h>
> +#include <linux/mfd/samsung/s2mps16.h>
>  
>  /*
>   * Maximum number of retries for checking changes in UDR field
> @@ -254,6 +255,11 @@ static int s5m_check_pending_alarm_interrupt(struct s5m_rtc_info *info,
>  		ret = regmap_read(info->regmap, S5M_RTC_STATUS, &val);
>  		val &= S5M_ALARM0_STATUS;
>  		break;
> +	case S2MPS16X:
> +		ret = regmap_read(info->s5m87xx->regmap_pmic, S2MPS16_REG_ST2,
> +				  &val);
> +		val &= S2MPS_ALARM0_STATUS;
> +		break;
>  	case S2MPG10:
>  	case S2MPS15X:
>  	case S2MPS14X:
> @@ -303,6 +309,7 @@ static int s5m8767_rtc_set_alarm_reg(struct s5m_rtc_info *info)
>  		udr_mask |= S5M_RTC_TIME_EN_MASK;
>  		break;
>  	case S2MPG10:
> +	case S2MPS16X:
>  	case S2MPS15X:
>  	case S2MPS14X:
>  	case S2MPS13X:
> @@ -354,6 +361,7 @@ static int s5m_rtc_read_time(struct device *dev, struct rtc_time *tm)
>  	switch (info->device_type) {
>  	case S5M8767X:
>  	case S2MPG10:
> +	case S2MPS16X:
>  	case S2MPS15X:
>  	case S2MPS14X:
>  	case S2MPS13X:
> @@ -378,6 +386,7 @@ static int s5m_rtc_set_time(struct device *dev, struct rtc_time *tm)
>  	switch (info->device_type) {
>  	case S5M8767X:
>  	case S2MPG10:
> +	case S2MPS16X:
>  	case S2MPS15X:
>  	case S2MPS14X:
>  	case S2MPS13X:
> @@ -416,6 +425,7 @@ static int s5m_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
>  	switch (info->device_type) {
>  	case S5M8767X:
>  	case S2MPG10:
> +	case S2MPS16X:
>  	case S2MPS15X:
>  	case S2MPS14X:
>  	case S2MPS13X:
> @@ -455,6 +465,7 @@ static int s5m_rtc_stop_alarm(struct s5m_rtc_info *info)
>  	switch (info->device_type) {
>  	case S5M8767X:
>  	case S2MPG10:
> +	case S2MPS16X:
>  	case S2MPS15X:
>  	case S2MPS14X:
>  	case S2MPS13X:
> @@ -494,6 +505,7 @@ static int s5m_rtc_start_alarm(struct s5m_rtc_info *info)
>  	switch (info->device_type) {
>  	case S5M8767X:
>  	case S2MPG10:
> +	case S2MPS16X:
>  	case S2MPS15X:
>  	case S2MPS14X:
>  	case S2MPS13X:
> @@ -532,6 +544,7 @@ static int s5m_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
>  	switch (info->device_type) {
>  	case S5M8767X:
>  	case S2MPG10:
> +	case S2MPS16X:
>  	case S2MPS15X:
>  	case S2MPS14X:
>  	case S2MPS13X:
> @@ -613,6 +626,7 @@ static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info)
>  		break;
>  
>  	case S2MPG10:
> +	case S2MPS16X:
>  	case S2MPS15X:
>  	case S2MPS14X:
>  	case S2MPS13X:
> @@ -680,6 +694,7 @@ static int s5m_rtc_probe(struct platform_device *pdev)
>  		struct i2c_client *i2c;
>  
>  		switch (device_type) {
> +		case S2MPS16X:
>  		case S2MPS15X:
>  			regmap_cfg = &s2mps14_rtc_regmap_config;
>  			info->regs = &s2mps15_rtc_regs;
> @@ -817,6 +832,7 @@ static const struct platform_device_id s5m_rtc_id[] = {
>  	{ "s2mps13-rtc",	S2MPS13X },
>  	{ "s2mps14-rtc",	S2MPS14X },
>  	{ "s2mps15-rtc",	S2MPS15X },
> +	{ "s2mps16-rtc",	S2MPS16X },
>  	{ },
>  };
>  MODULE_DEVICE_TABLE(platform, s5m_rtc_id);
> -- 
> 2.43.0
> 

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com