linux-kernel - Re: [PATCH v2 02/14] mfd: pm8008: fix regmap irq chip initialisation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240531170353.GB1204315@google.com>
Date: Fri, 31 May 2024 18:03:53 +0100
From: Lee Jones <lee@...nel.org>
To: Johan Hovold <johan+linaro@...nel.org>
Cc: Mark Brown <broonie@...nel.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Das Srinagesh <quic_gurus@...cinc.com>,
	Satya Priya Kakitapalli <quic_skakitap@...cinc.com>,
	Stephen Boyd <swboyd@...omium.org>,
	Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
	Andy Shevchenko <andy.shevchenko@...il.com>,
	linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org
Subject: Re: [PATCH v2 02/14] mfd: pm8008: fix regmap irq chip initialisation

On Wed, 29 May 2024, Johan Hovold wrote:

> The regmap irq array is potentially shared between multiple PMICs and
> should only contain static data.
> 
> Use a custom macro to initialise also the type fields and drop the
> unnecessary updates on each probe.
> 
> Fixes: 6b149f3310a4 ("mfd: pm8008: Add driver for QCOM PM8008 PMIC")
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
> ---
>  drivers/mfd/qcom-pm8008.c | 64 ++++++++++++++-------------------------
>  1 file changed, 23 insertions(+), 41 deletions(-)
> 
> diff --git a/drivers/mfd/qcom-pm8008.c b/drivers/mfd/qcom-pm8008.c
> index 3ac3742f438b..f71c490f25c8 100644
> --- a/drivers/mfd/qcom-pm8008.c
> +++ b/drivers/mfd/qcom-pm8008.c
> @@ -56,15 +56,25 @@ static unsigned int pm8008_config_regs[] = {
>  	INT_POL_LOW_OFFSET,
>  };
>  
> -static struct regmap_irq pm8008_irqs[] = {
> -	REGMAP_IRQ_REG(PM8008_IRQ_MISC_UVLO,	PM8008_MISC,	BIT(0)),
> -	REGMAP_IRQ_REG(PM8008_IRQ_MISC_OVLO,	PM8008_MISC,	BIT(1)),
> -	REGMAP_IRQ_REG(PM8008_IRQ_MISC_OTST2,	PM8008_MISC,	BIT(2)),
> -	REGMAP_IRQ_REG(PM8008_IRQ_MISC_OTST3,	PM8008_MISC,	BIT(3)),
> -	REGMAP_IRQ_REG(PM8008_IRQ_MISC_LDO_OCP,	PM8008_MISC,	BIT(4)),
> -	REGMAP_IRQ_REG(PM8008_IRQ_TEMP_ALARM,	PM8008_TEMP_ALARM, BIT(0)),
> -	REGMAP_IRQ_REG(PM8008_IRQ_GPIO1,	PM8008_GPIO1,	BIT(0)),
> -	REGMAP_IRQ_REG(PM8008_IRQ_GPIO2,	PM8008_GPIO2,	BIT(0)),
> +#define _IRQ(_irq, _off, _mask, _types)			\
> +	[_irq] = {					\
> +		.reg_offset = (_off),			\
> +		.mask = (_mask),			\
> +		.type = {				\
> +			.type_reg_offset = (_off),	\
> +			.types_supported = (_types),	\
> +		},					\
> +	}

Any reason why this can't be generic and be tucked away somewhere in a
header file?

> +static const struct regmap_irq pm8008_irqs[] = {
> +	_IRQ(PM8008_IRQ_MISC_UVLO,    PM8008_MISC,	BIT(0), IRQ_TYPE_EDGE_RISING),
> +	_IRQ(PM8008_IRQ_MISC_OVLO,    PM8008_MISC,	BIT(1), IRQ_TYPE_EDGE_RISING),
> +	_IRQ(PM8008_IRQ_MISC_OTST2,   PM8008_MISC,	BIT(2), IRQ_TYPE_EDGE_RISING),
> +	_IRQ(PM8008_IRQ_MISC_OTST3,   PM8008_MISC,	BIT(3), IRQ_TYPE_EDGE_RISING),
> +	_IRQ(PM8008_IRQ_MISC_LDO_OCP, PM8008_MISC,	BIT(4), IRQ_TYPE_EDGE_RISING),
> +	_IRQ(PM8008_IRQ_TEMP_ALARM,   PM8008_TEMP_ALARM,BIT(0), IRQ_TYPE_SENSE_MASK),
> +	_IRQ(PM8008_IRQ_GPIO1,	      PM8008_GPIO1,	BIT(0), IRQ_TYPE_SENSE_MASK),
> +	_IRQ(PM8008_IRQ_GPIO2,	      PM8008_GPIO2,	BIT(0), IRQ_TYPE_SENSE_MASK),
>  };
>  
>  static const unsigned int pm8008_periph_base[] = {
> @@ -143,38 +153,9 @@ static struct regmap_config qcom_mfd_regmap_cfg = {
>  	.max_register	= 0xFFFF,
>  };
>  
> -static int pm8008_probe_irq_peripherals(struct device *dev,
> -					struct regmap *regmap,
> -					int client_irq)
> -{
> -	int rc, i;
> -	struct regmap_irq_type *type;
> -	struct regmap_irq_chip_data *irq_data;
> -
> -	for (i = 0; i < ARRAY_SIZE(pm8008_irqs); i++) {
> -		type = &pm8008_irqs[i].type;
> -
> -		type->type_reg_offset = pm8008_irqs[i].reg_offset;
> -
> -		if (type->type_reg_offset == PM8008_MISC)
> -			type->types_supported = IRQ_TYPE_EDGE_RISING;
> -		else
> -			type->types_supported = (IRQ_TYPE_EDGE_BOTH |
> -				IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW);
> -	}
> -
> -	rc = devm_regmap_add_irq_chip(dev, regmap, client_irq,
> -			IRQF_SHARED, 0, &pm8008_irq_chip, &irq_data);
> -	if (rc) {
> -		dev_err(dev, "Failed to add IRQ chip: %d\n", rc);
> -		return rc;
> -	}
> -
> -	return 0;
> -}
> -
>  static int pm8008_probe(struct i2c_client *client)
>  {
> +	struct regmap_irq_chip_data *irq_data;
>  	int rc;
>  	struct device *dev;
>  	struct regmap *regmap;
> @@ -187,9 +168,10 @@ static int pm8008_probe(struct i2c_client *client)
>  	i2c_set_clientdata(client, regmap);
>  
>  	if (of_property_read_bool(dev->of_node, "interrupt-controller")) {
> -		rc = pm8008_probe_irq_peripherals(dev, regmap, client->irq);
> +		rc = devm_regmap_add_irq_chip(dev, regmap, client->irq,
> +				IRQF_SHARED, 0, &pm8008_irq_chip, &irq_data);
>  		if (rc)
> -			dev_err(dev, "Failed to probe irq periphs: %d\n", rc);
> +			dev_err(dev, "failed to add IRQ chip: %d\n", rc);
>  	}
>  
>  	return devm_of_platform_populate(dev);
> -- 
> 2.44.1
> 

-- 
Lee Jones [李琼斯]