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SubjectRe: [PATCH] irqchip: renesas-irqc: Add wake-up support
On Wed, Apr 01, 2015 at 02:00:06PM +0200, Geert Uytterhoeven wrote:
> The IRQC module clock is managed through Runtime PM and PM Domains.
> If wake-up is enabled, this clock must not be disabled during system
> suspend.
>
> Hence implement irq_chip.irq_set_wake(), which increments/decrements the
> clock's enable_count when needed.
>
> This fixes wake-up by gpio-keys on r8a73a4/ape6evm.
>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>

> ---
> Against irqchip/renesas
>
> drivers/irqchip/irq-renesas-irqc.c | 26 +++++++++++++++++++++++++-
> 1 file changed, 25 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/irqchip/irq-renesas-irqc.c b/drivers/irqchip/irq-renesas-irqc.c
> index 718f01cd1aea19f6..cdf80b7794cd738e 100644
> --- a/drivers/irqchip/irq-renesas-irqc.c
> +++ b/drivers/irqchip/irq-renesas-irqc.c
> @@ -17,6 +17,7 @@
> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> */
>
> +#include <linux/clk.h>
> #include <linux/init.h>
> #include <linux/platform_device.h>
> #include <linux/spinlock.h>
> @@ -66,6 +67,7 @@ struct irqc_priv {
> struct platform_device *pdev;
> struct irq_chip irq_chip;
> struct irq_domain *irq_domain;
> + struct clk *clk;
> };
>
> static void irqc_dbg(struct irqc_irq *i, char *str)
> @@ -119,6 +121,21 @@ static int irqc_irq_set_type(struct irq_data *d, unsigned int type)
> return 0;
> }
>
> +static int irqc_irq_set_wake(struct irq_data *d, unsigned int on)
> +{
> + struct irqc_priv *p = irq_data_get_irq_chip_data(d);
> +
> + if (!p->clk)
> + return 0;
> +
> + if (on)
> + clk_enable(p->clk);
> + else
> + clk_disable(p->clk);
> +
> + return 0;
> +}
> +
> static irqreturn_t irqc_irq_handler(int irq, void *dev_id)
> {
> struct irqc_irq *i = dev_id;
> @@ -181,6 +198,12 @@ static int irqc_probe(struct platform_device *pdev)
> p->pdev = pdev;
> platform_set_drvdata(pdev, p);
>
> + p->clk = devm_clk_get(&pdev->dev, NULL);
> + if (IS_ERR(p->clk)) {
> + dev_warn(&pdev->dev, "unable to get clock\n");
> + p->clk = NULL;
> + }
> +
> pm_runtime_enable(&pdev->dev);
> pm_runtime_get_sync(&pdev->dev);
>
> @@ -224,7 +247,8 @@ static int irqc_probe(struct platform_device *pdev)
> irq_chip->irq_mask = irqc_irq_disable;
> irq_chip->irq_unmask = irqc_irq_enable;
> irq_chip->irq_set_type = irqc_irq_set_type;
> - irq_chip->flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND;
> + irq_chip->irq_set_wake = irqc_irq_set_wake;
> + irq_chip->flags = IRQCHIP_MASK_ON_SUSPEND;
>
> p->irq_domain = irq_domain_add_simple(pdev->dev.of_node,
> p->number_of_irqs,
> --
> 1.9.1
>


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