linux-kernel - Re: [RFC PATCH 04/15] irqchip: exynos

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Date:	Fri, 10 Jun 2016 13:44:40 +0200
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Matthew Leach <matthew@...tleach.net>,
	Ben Dooks <ben.dooks@...ethink.co.uk>
Cc:	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>,
	Marc Zyngier <marc.zyngier@....com>,
	Kukjin Kim <kgene@...nel.org>
Subject: Re: [RFC PATCH 04/15] irqchip: exynos_combiner: fixup reg access on be

On 06/08/2016 08:30 PM, Matthew Leach wrote:
> Use the byte-order aware big endian accessors, allowing for kernels
> running under big-endian.
> 
> Signed-off-by: Matthew Leach <matthew@...tleach.net>
> ---
> CC: Thomas Gleixner <tglx@...utronix.de>
> CC: Jason Cooper <jason@...edaemon.net>
> CC: Marc Zyngier <marc.zyngier@....com>
> CC: Kukjin Kim <kgene@...nel.org>
> CC: Krzysztof Kozlowski <k.kozlowski@...sung.com>
> CC: linux-kernel@...r.kernel.org
> CC: linux-arm-kernel@...ts.infradead.org
> CC: linux-samsung-soc@...r.kernel.org
> ---
>  drivers/irqchip/exynos-combiner.c | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/irqchip/exynos-combiner.c b/drivers/irqchip/exynos-combiner.c
> index ead15be..b78a169 100644
> --- a/drivers/irqchip/exynos-combiner.c
> +++ b/drivers/irqchip/exynos-combiner.c
> @@ -55,14 +55,14 @@ static void combiner_mask_irq(struct irq_data *data)
>  {
>  	u32 mask = 1 << (data->hwirq % 32);
>  
> -	__raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_CLEAR);
> +	writel_relaxed(mask, combiner_base(data) + COMBINER_ENABLE_CLEAR);
>  }
>  
>  static void combiner_unmask_irq(struct irq_data *data)
>  {
>  	u32 mask = 1 << (data->hwirq % 32);
>  
> -	__raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_SET);
> +	writel_relaxed(mask, combiner_base(data) + COMBINER_ENABLE_SET);
>  }
>  
>  static void combiner_handle_cascade_irq(struct irq_desc *desc)
> @@ -75,7 +75,7 @@ static void combiner_handle_cascade_irq(struct irq_desc *desc)
>  	chained_irq_enter(chip, desc);
>  
>  	spin_lock(&irq_controller_lock);
> -	status = __raw_readl(chip_data->base + COMBINER_INT_STATUS);
> +	status = readl_relaxed(chip_data->base + COMBINER_INT_STATUS);
>  	spin_unlock(&irq_controller_lock);
>  	status &= chip_data->irq_mask;
>  
> @@ -135,7 +135,7 @@ static void __init combiner_init_one(struct combiner_chip_data *combiner_data,
>  	combiner_data->parent_irq = irq;
>  
>  	/* Disable all interrupts */
> -	__raw_writel(combiner_data->irq_mask, base + COMBINER_ENABLE_CLEAR);
> +	writel_relaxed(combiner_data->irq_mask, base + COMBINER_ENABLE_CLEAR);
>  }
>  
>  static int combiner_irq_domain_xlate(struct irq_domain *d,
> @@ -218,7 +218,7 @@ static int combiner_suspend(void)
>  
>  	for (i = 0; i < max_nr; i++)
>  		combiner_data[i].pm_save =
> -			__raw_readl(combiner_data[i].base + COMBINER_ENABLE_SET);
> +			readl_relaxed(combiner_data[i].base + COMBINER_ENABLE_SET);
>  
>  	return 0;
>  }
> @@ -235,9 +235,9 @@ static void combiner_resume(void)
>  	int i;
>  
>  	for (i = 0; i < max_nr; i++) {
> -		__raw_writel(combiner_data[i].irq_mask,
> +		writel_relaxed(combiner_data[i].irq_mask,
>  			     combiner_data[i].base + COMBINER_ENABLE_CLEAR);
> -		__raw_writel(combiner_data[i].pm_save,
> +		writel_relaxed(combiner_data[i].pm_save,
>  			     combiner_data[i].base + COMBINER_ENABLE_SET);

Indentation of arguments is broken. I think it was aligned before.

Beside that:

Reviewed-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>

Best regards,
Krzysztof