linux-kernel - Re: [PATCH v5 1/3] clocksource: timer-keystone: introduce clocksource driver for Keystone

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Message-ID: <52F397A5.8030201@ti.com>
Date:	Thu, 6 Feb 2014 16:09:41 +0200
From:	Ivan Khoronzhuk <ivan.khoronzhuk@...com>
To:	Josh Cartwright <joshc@...eaurora.org>
CC:	<santosh.shilimkar@...com>, <rob@...dley.net>,
	<linux@....linux.org.uk>, <galak@...eaurora.org>,
	<mark.rutland@....com>, <devicetree@...r.kernel.org>,
	<grygorii.strashko@...com>, <pawel.moll@....com>,
	<ijc+devicetree@...lion.org.uk>, <daniel.lezcano@...aro.org>,
	<linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<robh+dt@...nel.org>, <tglx@...utronix.de>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v5 1/3] clocksource: timer-keystone: introduce clocksource
 driver for Keystone

On 02/06/2014 02:35 AM, Josh Cartwright wrote:
> Hey Ivan-
>
> On Wed, Feb 05, 2014 at 03:47:38PM +0200, Ivan Khoronzhuk wrote:
>> Add broadcast clock-event device for the Keystone arch.
>>
>> The timer can be configured as a general-purpose 64-bit timer,
>> dual general-purpose 32-bit timers. When configured as dual 32-bit
>> timers, each half can operate in conjunction (chain mode) or
>> independently (unchained mode) of each other.
>>
>> Reviewed-by: Stephen Boyd <sboyd@...eaurora.org>
>> Acked-by: Santosh shilimkar <santosh.shilimkar@...com>
>> Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@...com>
>> ---
>>   drivers/clocksource/Makefile         |   1 +
>>   drivers/clocksource/timer-keystone.c | 233 +++++++++++++++++++++++++++++++++++
>>   2 files changed, 234 insertions(+)
>>   create mode 100644 drivers/clocksource/timer-keystone.c
>>
>> diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
>> index c7ca50a..4abe5aa 100644
>> --- a/drivers/clocksource/Makefile
>> +++ b/drivers/clocksource/Makefile
>> @@ -37,3 +37,4 @@ obj-$(CONFIG_ARM_ARCH_TIMER)		+= arm_arch_timer.o
>>   obj-$(CONFIG_ARM_GLOBAL_TIMER)		+= arm_global_timer.o
>>   obj-$(CONFIG_CLKSRC_METAG_GENERIC)	+= metag_generic.o
>>   obj-$(CONFIG_ARCH_HAS_TICK_BROADCAST)	+= dummy_timer.o
>> +obj-$(CONFIG_ARCH_KEYSTONE)		+= timer-keystone.o
>> diff --git a/drivers/clocksource/timer-keystone.c b/drivers/clocksource/timer-keystone.c
>> new file mode 100644
>> index 0000000..2299666
>> --- /dev/null
>> +++ b/drivers/clocksource/timer-keystone.c
>> +static void __init keystone_timer_init(struct device_node *np)
>> +{
>> +	struct clock_event_device *event_dev = &timer.event_dev;
>> +	unsigned long rate;
>> +	struct clk *clk;
>> +	int irq, error;
>> +	u32 tgcr;
>> +
>> +	irq  = irq_of_parse_and_map(np, 0);
>> +	if (irq == NO_IRQ) {
>> +		pr_err("%s: failed to map interrupts\n", __func__);
>> +		return;
>> +	}
>> +
>> +	timer.base = of_iomap(np, 0);
>> +	if (!timer.base) {
>> +		pr_err("%s: failed to map registers\n", __func__);
>> +		return;
>> +	}
>> +
>> +	clk = of_clk_get(np, 0);
>> +	if (!clk) {
> This condition should be IS_ERR(clk).

Thanks Josh,
I'll fix it.

-- 
Regards,
Ivan Khoronzhuk

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