Merge branch 'x86-pmem-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[firefly-linux-kernel-4.4.55.git] / drivers / irqchip / irq-renesas-irqc.c

diff --git a/drivers/irqchip/irq-renesas-irqc.c b/drivers/irqchip/irq-renesas-irqc.c
index 384e6ed61d7c5e94a3081380b0bde6edc2d08129..cdf80b7794cd738e38ec956f3246ae216f9ddde1 100644 (file)
--- 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>
@@ -29,15 +30,26 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/platform_data/irq-renesas-irqc.h>
+#include <linux/pm_runtime.h>
 
-#define IRQC_IRQ_MAX 32 /* maximum 32 interrupts per driver instance */
+#define IRQC_IRQ_MAX   32      /* maximum 32 interrupts per driver instance */
 
-#define IRQC_REQ_STS 0x00
-#define IRQC_EN_STS 0x04
-#define IRQC_EN_SET 0x08
+#define IRQC_REQ_STS   0x00    /* Interrupt Request Status Register */
+#define IRQC_EN_STS    0x04    /* Interrupt Enable Status Register */
+#define IRQC_EN_SET    0x08    /* Interrupt Enable Set Register */
 #define IRQC_INT_CPU_BASE(n) (0x000 + ((n) * 0x10))
-#define DETECT_STATUS 0x100
+                               /* SYS-CPU vs. RT-CPU */
+#define DETECT_STATUS  0x100   /* IRQn Detect Status Register */
+#define MONITOR                0x104   /* IRQn Signal Level Monitor Register */
+#define HLVL_STS       0x108   /* IRQn High Level Detect Status Register */
+#define LLVL_STS       0x10c   /* IRQn Low Level Detect Status Register */
+#define S_R_EDGE_STS   0x110   /* IRQn Sync Rising Edge Detect Status Reg. */
+#define S_F_EDGE_STS   0x114   /* IRQn Sync Falling Edge Detect Status Reg. */
+#define A_R_EDGE_STS   0x118   /* IRQn Async Rising Edge Detect Status Reg. */
+#define A_F_EDGE_STS   0x11c   /* IRQn Async Falling Edge Detect Status Reg. */
+#define CHTEN_STS      0x120   /* Chattering Reduction Status Register */
 #define IRQC_CONFIG(n) (0x180 + ((n) * 0x04))
+                               /* IRQn Configuration Register */
 
 struct irqc_irq {
        int hw_irq;
@@ -55,6 +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)
@@ -94,7 +107,7 @@ static int irqc_irq_set_type(struct irq_data *d, unsigned int type)
        struct irqc_priv *p = irq_data_get_irq_chip_data(d);
        int hw_irq = irqd_to_hwirq(d);
        unsigned char value = irqc_sense[type & IRQ_TYPE_SENSE_MASK];
-       unsigned long tmp;
+       u32 tmp;
 
        irqc_dbg(&p->irq[hw_irq], "sense");
 
@@ -108,11 +121,26 @@ 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;
        struct irqc_priv *p = i->p;
-       unsigned long bit = BIT(i->hw_irq);
+       u32 bit = BIT(i->hw_irq);
 
        irqc_dbg(i, "demux1");
 
@@ -170,6 +198,15 @@ 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);
+
        /* get hold of manadatory IOMEM */
        io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (!io) {
@@ -210,7 +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,
@@ -250,6 +288,8 @@ err3:
 err2:
        iounmap(p->iomem);
 err1:
+       pm_runtime_put(&pdev->dev);
+       pm_runtime_disable(&pdev->dev);
        kfree(p);
 err0:
        return ret;
@@ -265,6 +305,8 @@ static int irqc_remove(struct platform_device *pdev)
 
        irq_domain_remove(p->irq_domain);
        iounmap(p->iomem);
+       pm_runtime_put(&pdev->dev);
+       pm_runtime_disable(&pdev->dev);
        kfree(p);
        return 0;
 }