From 6f46aedb9c85873b67f6186a8b0f9d7a769b6b2c Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Wed, 1 Apr 2015 14:00:06 +0200 Subject: [PATCH] irqchip: renesas-irqc: Add wake-up support 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 Reviewed-by: Simon Horman Link: https://lkml.kernel.org/r/1427889606-18671-1-git-send-email-geert+renesas@glider.be Signed-off-by: Jason Cooper --- 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 2fe9612041b0..7be2fdf69924 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 #include #include #include @@ -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, -- 2.20.1