linux-kernel - Re: [PATCH 1/2] acpi/pmic: modify the pen function signature to take bit field

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Date:	Sun, 12 Jun 2016 10:07:45 +0800
From:	Aaron Lu <aaron.lu@...el.com>
To:	Bin Gao <bin.gao@...ux.intel.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	linux-acpi@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, ysiyer <yegnesh.s.iyer@...el.com>,
	Ajay Thomas <ajay.thomas.david.rajamanickam@...el.com>,
	Bin Gao <bin.gao@...el.com>
Subject: Re: [PATCH 1/2] acpi/pmic: modify the pen function signature to take
 bit field

On 06/11/2016 03:22 PM, Bin Gao wrote:
> Issue description: On some pmics, the policy enable for thermal alerts
> refers to different bit fields of the same registers, whereas on other
> pmics, the policy enable refers to the same bit field on different
> registers. Previous implementation did not provide the flexibility for
> supporting the first approach.
> 
> Solution: Modified the policy enable function to take bit field as well.
> The use of bit field is left to the pmic specific opregion driver.
> 
> Signed-off-by: Yegnesh Iyer <yegnesh.s.iyer@...el.com>
> Signed-off-by: Bin Gao <bin.gao@...el.com>

Acked-by: Aaron Lu <aaron.lu@...el.com>

Thanks,
Aaron

> ---
>  drivers/acpi/pmic/intel_pmic.c     | 13 +++++++------
>  drivers/acpi/pmic/intel_pmic.h     |  4 ++--
>  drivers/acpi/pmic/intel_pmic_crc.c |  5 +++--
>  3 files changed, 12 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/acpi/pmic/intel_pmic.c b/drivers/acpi/pmic/intel_pmic.c
> index bd772cd..410e96f 100644
> --- a/drivers/acpi/pmic/intel_pmic.c
> +++ b/drivers/acpi/pmic/intel_pmic.c
> @@ -131,7 +131,7 @@ static int pmic_thermal_aux(struct intel_pmic_opregion *opregion, int reg,
>  }
>  
>  static int pmic_thermal_pen(struct intel_pmic_opregion *opregion, int reg,
> -			    u32 function, u64 *value)
> +			    int bit, u32 function, u64 *value)
>  {
>  	struct intel_pmic_opregion_data *d = opregion->data;
>  	struct regmap *regmap = opregion->regmap;
> @@ -140,12 +140,12 @@ static int pmic_thermal_pen(struct intel_pmic_opregion *opregion, int reg,
>  		return -ENXIO;
>  
>  	if (function == ACPI_READ)
> -		return d->get_policy(regmap, reg, value);
> +		return d->get_policy(regmap, reg, bit, value);
>  
>  	if (*value != 0 && *value != 1)
>  		return -EINVAL;
>  
> -	return d->update_policy(regmap, reg, *value);
> +	return d->update_policy(regmap, reg, bit, *value);
>  }
>  
>  static bool pmic_thermal_is_temp(int address)
> @@ -170,13 +170,13 @@ static acpi_status intel_pmic_thermal_handler(u32 function,
>  {
>  	struct intel_pmic_opregion *opregion = region_context;
>  	struct intel_pmic_opregion_data *d = opregion->data;
> -	int reg, result;
> +	int reg, bit, result;
>  
>  	if (bits != 32 || !value64)
>  		return AE_BAD_PARAMETER;
>  
>  	result = pmic_get_reg_bit(address, d->thermal_table,
> -				  d->thermal_table_count, &reg, NULL);
> +				  d->thermal_table_count, &reg, &bit);
>  	if (result == -ENOENT)
>  		return AE_BAD_PARAMETER;
>  
> @@ -187,7 +187,8 @@ static acpi_status intel_pmic_thermal_handler(u32 function,
>  	else if (pmic_thermal_is_aux(address))
>  		result = pmic_thermal_aux(opregion, reg, function, value64);
>  	else if (pmic_thermal_is_pen(address))
> -		result = pmic_thermal_pen(opregion, reg, function, value64);
> +		result = pmic_thermal_pen(opregion, reg, bit,
> +						function, value64);
>  	else
>  		result = -EINVAL;
>  
> diff --git a/drivers/acpi/pmic/intel_pmic.h b/drivers/acpi/pmic/intel_pmic.h
> index d4e90af..e8bfa7b 100644
> --- a/drivers/acpi/pmic/intel_pmic.h
> +++ b/drivers/acpi/pmic/intel_pmic.h
> @@ -12,8 +12,8 @@ struct intel_pmic_opregion_data {
>  	int (*update_power)(struct regmap *r, int reg, int bit, bool on);
>  	int (*get_raw_temp)(struct regmap *r, int reg);
>  	int (*update_aux)(struct regmap *r, int reg, int raw_temp);
> -	int (*get_policy)(struct regmap *r, int reg, u64 *value);
> -	int (*update_policy)(struct regmap *r, int reg, int enable);
> +	int (*get_policy)(struct regmap *r, int reg, int bit, u64 *value);
> +	int (*update_policy)(struct regmap *r, int reg, int bit, int enable);
>  	struct pmic_table *power_table;
>  	int power_table_count;
>  	struct pmic_table *thermal_table;
> diff --git a/drivers/acpi/pmic/intel_pmic_crc.c b/drivers/acpi/pmic/intel_pmic_crc.c
> index fcd1852..d7f1761 100644
> --- a/drivers/acpi/pmic/intel_pmic_crc.c
> +++ b/drivers/acpi/pmic/intel_pmic_crc.c
> @@ -141,7 +141,8 @@ static int intel_crc_pmic_update_aux(struct regmap *regmap, int reg, int raw)
>  		regmap_update_bits(regmap, reg - 1, 0x3, raw >> 8) ? -EIO : 0;
>  }
>  
> -static int intel_crc_pmic_get_policy(struct regmap *regmap, int reg, u64 *value)
> +static int intel_crc_pmic_get_policy(struct regmap *regmap,
> +					int reg, int bit, u64 *value)
>  {
>  	int pen;
>  
> @@ -152,7 +153,7 @@ static int intel_crc_pmic_get_policy(struct regmap *regmap, int reg, u64 *value)
>  }
>  
>  static int intel_crc_pmic_update_policy(struct regmap *regmap,
> -					int reg, int enable)
> +					int reg, int bit, int enable)
>  {
>  	int alert0;
>  
>