linux-kernel - Re: [PATCH v5 09/10] clocksource: atmel-st: remove mach/hardware dependency

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Date:	Fri, 13 Mar 2015 11:21:35 +0100
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Nicolas Ferre <nicolas.ferre@...el.com>
CC:	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Wim Van Sebroeck <wim@...ana.be>,
	Guenter Roeck <linux@...ck-us.net>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-watchdog@...r.kernel.org
Subject: Re: [PATCH v5 09/10] clocksource: atmel-st: remove mach/hardware
 dependency

On 03/12/2015 01:07 PM, Alexandre Belloni wrote:
> Remove the mach/hardware dependency to prepare the driver for multiplatform
> support.
> Also switch from setup_irq() to request_irq()
>
> Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
> ---
>   drivers/clocksource/timer-atmel-st.c | 21 +++++++++------------
>   1 file changed, 9 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/clocksource/timer-atmel-st.c b/drivers/clocksource/timer-atmel-st.c
> index 674ef2519d6b..91d6cbb7a56b 100644
> --- a/drivers/clocksource/timer-atmel-st.c
> +++ b/drivers/clocksource/timer-atmel-st.c
> @@ -31,13 +31,12 @@
>
>   #include <asm/mach/time.h>

Couldn't the header above be removed ?

Other than that:

Acked-by: Daniel Lezcano <daniel.lezcano@...aro.org>

> -#include <mach/hardware.h>
> -
>   static unsigned long last_crtr;
>   static u32 irqmask;
>   static struct clock_event_device clkevt;
>   static struct regmap *regmap_st;
>
> +#define AT91_SLOW_CLOCK		32768
>   #define RM9200_TIMER_LATCH	((AT91_SLOW_CLOCK + HZ/2) / HZ)
>
>   /*
> @@ -96,13 +95,6 @@ static irqreturn_t at91rm9200_timer_interrupt(int irq, void *dev_id)
>   	return IRQ_NONE;
>   }
>
> -static struct irqaction at91rm9200_timer_irq = {
> -	.name		= "at91_tick",
> -	.flags		= IRQF_SHARED | IRQF_TIMER | IRQF_IRQPOLL,
> -	.handler	= at91rm9200_timer_interrupt,
> -	.irq		= NR_IRQS_LEGACY + AT91_ID_SYS,
> -};
> -
>   static cycle_t read_clk32k(struct clocksource *cs)
>   {
>   	return read_CRTR();
> @@ -193,6 +185,7 @@ static struct clock_event_device clkevt = {
>   static void __init atmel_st_timer_init(struct device_node *node)
>   {
>   	unsigned int val;
> +	int irq, ret;
>
>   	regmap_st = syscon_node_to_regmap(node);
>   	if (IS_ERR(regmap_st))
> @@ -204,12 +197,16 @@ static void __init atmel_st_timer_init(struct device_node *node)
>   	regmap_read(regmap_st, AT91_ST_SR, &val);
>
>   	/* Get the interrupts property */
> -	at91rm9200_timer_irq.irq  = irq_of_parse_and_map(node, 0);
> -	if (!at91rm9200_timer_irq.irq)
> +	irq  = irq_of_parse_and_map(node, 0);
> +	if (!irq)
>   		panic(pr_fmt("Unable to get IRQ from DT\n"));
>
>   	/* Make IRQs happen for the system timer */
> -	setup_irq(at91rm9200_timer_irq.irq, &at91rm9200_timer_irq);
> +	ret = request_irq(irq, at91rm9200_timer_interrupt,
> +			  IRQF_SHARED | IRQF_TIMER | IRQF_IRQPOLL,
> +			  "at91_tick", regmap_st);
> +	if (ret)
> +		panic(pr_fmt("Unable to setup IRQ\n"));
>
>   	/* The 32KiHz "Slow Clock" (tick every 30517.58 nanoseconds) is used
>   	 * directly for the clocksource and all clockevents, after adjusting
>


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