Merge tag 'soc2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm…

…/arm-soc Pull ARM soc-specific updates, take 2 from Olof Johansson: "This branch converts the MXS Freescale platform to use irqdomains and sparse IRQ, in preparation for DT probing and multiplatform kernels." * tag 'soc2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: ARM: mxs: remove mach/irqs.h ARM: mxs: select SPARSE_IRQ ARM: mxs: adopt irq_domain support for icoll driver ARM: mxs: select MULTI_IRQ_HANDLER ARM: mxs: retrieve timer irq from device tree gpio/mxs: adopt irq_domain support for mxs gpio driver
git-mirror · Oct 2, 2012 · 84be4ae · 84be4ae
2 parents ac9e7ab + 36246a8
commit 84be4ae
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Showing 12 changed files with 112 additions and 137 deletions.
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
@@ -485,7 +485,9 @@ config ARCH_MXS
 	select CLKSRC_MMIO
 	select COMMON_CLK
 	select HAVE_CLK_PREPARE
+	select MULTI_IRQ_HANDLER
 	select PINCTRL
+	select SPARSE_IRQ
 	select USE_OF
 	help
 	  Support for Freescale MXS-based family of processors

diff --git a/arch/arm/boot/dts/imx23.dtsi b/arch/arm/boot/dts/imx23.dtsi
@@ -43,7 +43,7 @@
 			ranges;
 
 			icoll: interrupt-controller@80000000 {
-				compatible = "fsl,imx23-icoll", "fsl,mxs-icoll";
+				compatible = "fsl,imx23-icoll", "fsl,icoll";
 				interrupt-controller;
 				#interrupt-cells = <1>;
 				reg = <0x80000000 0x2000>;
@@ -407,8 +407,9 @@
 			};
 
 			timrot@80068000 {
+				compatible = "fsl,imx23-timrot", "fsl,timrot";
 				reg = <0x80068000 0x2000>;
-				status = "disabled";
+				interrupts = <28 29 30 31>;
 			};
 
 			auart0: serial@8006c000 {

diff --git a/arch/arm/boot/dts/imx28.dtsi b/arch/arm/boot/dts/imx28.dtsi
@@ -52,7 +52,7 @@
 			ranges;
 
 			icoll: interrupt-controller@80000000 {
-				compatible = "fsl,imx28-icoll", "fsl,mxs-icoll";
+				compatible = "fsl,imx28-icoll", "fsl,icoll";
 				interrupt-controller;
 				#interrupt-cells = <1>;
 				reg = <0x80000000 0x2000>;
@@ -787,8 +787,9 @@
 			};
 
 			timrot@80068000 {
+				compatible = "fsl,imx28-timrot", "fsl,timrot";
 				reg = <0x80068000 0x2000>;
-				status = "disabled";
+				interrupts = <48 49 50 51>;
 			};
 
 			auart0: serial@8006a000 {

diff --git a/arch/arm/mach-mxs/icoll.c b/arch/arm/mach-mxs/icoll.c
@@ -19,20 +19,27 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/irq.h>
+#include <linux/irqdomain.h>
 #include <linux/io.h>
-
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <asm/exception.h>
 #include <mach/mxs.h>
 #include <mach/common.h>
 
 #define HW_ICOLL_VECTOR				0x0000
 #define HW_ICOLL_LEVELACK			0x0010
 #define HW_ICOLL_CTRL				0x0020
+#define HW_ICOLL_STAT_OFFSET			0x0070
 #define HW_ICOLL_INTERRUPTn_SET(n)		(0x0124 + (n) * 0x10)
 #define HW_ICOLL_INTERRUPTn_CLR(n)		(0x0128 + (n) * 0x10)
 #define BM_ICOLL_INTERRUPTn_ENABLE		0x00000004
 #define BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0	0x1
 
+#define ICOLL_NUM_IRQS		128
+
 static void __iomem *icoll_base = MXS_IO_ADDRESS(MXS_ICOLL_BASE_ADDR);
+static struct irq_domain *icoll_domain;
 
 static void icoll_ack_irq(struct irq_data *d)
 {
@@ -48,13 +55,13 @@ static void icoll_ack_irq(struct irq_data *d)
 static void icoll_mask_irq(struct irq_data *d)
 {
 	__raw_writel(BM_ICOLL_INTERRUPTn_ENABLE,
-			icoll_base + HW_ICOLL_INTERRUPTn_CLR(d->irq));
+			icoll_base + HW_ICOLL_INTERRUPTn_CLR(d->hwirq));
 }
 
 static void icoll_unmask_irq(struct irq_data *d)
 {
 	__raw_writel(BM_ICOLL_INTERRUPTn_ENABLE,
-			icoll_base + HW_ICOLL_INTERRUPTn_SET(d->irq));
+			icoll_base + HW_ICOLL_INTERRUPTn_SET(d->hwirq));
 }
 
 static struct irq_chip mxs_icoll_chip = {
@@ -63,18 +70,56 @@ static struct irq_chip mxs_icoll_chip = {
 	.irq_unmask = icoll_unmask_irq,
 };
 
-void __init icoll_init_irq(void)
+asmlinkage void __exception_irq_entry icoll_handle_irq(struct pt_regs *regs)
 {
-	int i;
+	u32 irqnr;
+
+	do {
+		irqnr = __raw_readl(icoll_base + HW_ICOLL_STAT_OFFSET);
+		if (irqnr != 0x7f) {
+			__raw_writel(irqnr, icoll_base + HW_ICOLL_VECTOR);
+			irqnr = irq_find_mapping(icoll_domain, irqnr);
+			handle_IRQ(irqnr, regs);
+			continue;
+		}
+		break;
+	} while (1);
+}
+
+static int icoll_irq_domain_map(struct irq_domain *d, unsigned int virq,
+				irq_hw_number_t hw)
+{
+	irq_set_chip_and_handler(virq, &mxs_icoll_chip, handle_level_irq);
+	set_irq_flags(virq, IRQF_VALID);
+
+	return 0;
+}
 
+static struct irq_domain_ops icoll_irq_domain_ops = {
+	.map = icoll_irq_domain_map,
+	.xlate = irq_domain_xlate_onecell,
+};
+
+void __init icoll_of_init(struct device_node *np,
+			  struct device_node *interrupt_parent)
+{
 	/*
 	 * Interrupt Collector reset, which initializes the priority
 	 * for each irq to level 0.
 	 */
 	mxs_reset_block(icoll_base + HW_ICOLL_CTRL);
 
-	for (i = 0; i < MXS_INTERNAL_IRQS; i++) {
-		irq_set_chip_and_handler(i, &mxs_icoll_chip, handle_level_irq);
-		set_irq_flags(i, IRQF_VALID);
-	}
+	icoll_domain = irq_domain_add_linear(np, ICOLL_NUM_IRQS,
+					     &icoll_irq_domain_ops, NULL);
+	WARN_ON(!icoll_domain);
+}
+
+static const struct of_device_id icoll_of_match[] __initconst = {
+	{.compatible = "fsl,icoll", .data = icoll_of_init},
+	{ /* sentinel */ }
+};
+
+void __init icoll_init_irq(void)
+{
+	of_irq_init(icoll_of_match);
 }
diff --git a/arch/arm/mach-mxs/include/mach/common.h b/arch/arm/mach-mxs/include/mach/common.h
@@ -13,7 +13,7 @@
 
 extern const u32 *mxs_get_ocotp(void);
 extern int mxs_reset_block(void __iomem *);
-extern void mxs_timer_init(int);
+extern void mxs_timer_init(void);
 extern void mxs_restart(char, const char *);
 extern int mxs_saif_clkmux_select(unsigned int clkmux);
 
@@ -24,5 +24,6 @@ extern int mx28_clocks_init(void);
 extern void mx28_map_io(void);
 
 extern void icoll_init_irq(void);
+extern void icoll_handle_irq(struct pt_regs *);
 
 #endif /* __MACH_MXS_COMMON_H__ */
diff --git a/arch/arm/mach-mxs/include/mach/entry-macro.S b/arch/arm/mach-mxs/include/mach/entry-macro.S
diff --git a/arch/arm/mach-mxs/include/mach/irqs.h b/arch/arm/mach-mxs/include/mach/irqs.h
diff --git a/arch/arm/mach-mxs/mach-mxs.c b/arch/arm/mach-mxs/mach-mxs.c
@@ -17,10 +17,8 @@
 #include <linux/err.h>
 #include <linux/gpio.h>
 #include <linux/init.h>
-#include <linux/irqdomain.h>
 #include <linux/micrel_phy.h>
 #include <linux/mxsfb.h>
-#include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <linux/phy.h>
 #include <linux/pinctrl/consumer.h>
@@ -141,37 +139,6 @@ static struct of_dev_auxdata mxs_auxdata_lookup[] __initdata = {
 	{ /* sentinel */ }
 };
 
-static int __init mxs_icoll_add_irq_domain(struct device_node *np,
-				struct device_node *interrupt_parent)
-{
-	irq_domain_add_legacy(np, 128, 0, 0, &irq_domain_simple_ops, NULL);
-
-	return 0;
-}
-
-static int __init mxs_gpio_add_irq_domain(struct device_node *np,
-				struct device_node *interrupt_parent)
-{
-	static int gpio_irq_base = MXS_GPIO_IRQ_START;
-
-	irq_domain_add_legacy(np, 32, gpio_irq_base, 0, &irq_domain_simple_ops, NULL);
-	gpio_irq_base += 32;
-
-	return 0;
-}
-
-static const struct of_device_id mxs_irq_match[] __initconst = {
-	{ .compatible = "fsl,mxs-icoll", .data = mxs_icoll_add_irq_domain, },
-	{ .compatible = "fsl,mxs-gpio", .data = mxs_gpio_add_irq_domain, },
-	{ /* sentinel */ }
-};
-
-static void __init mxs_dt_init_irq(void)
-{
-	icoll_init_irq();
-	of_irq_init(mxs_irq_match);
-}
-
 static void __init imx23_timer_init(void)
 {
 	mx23_clocks_init();
@@ -421,7 +388,8 @@ static const char *imx28_dt_compat[] __initdata = {
 
 DT_MACHINE_START(IMX23, "Freescale i.MX23 (Device Tree)")
 	.map_io		= mx23_map_io,
-	.init_irq	= mxs_dt_init_irq,
+	.init_irq	= icoll_init_irq,
+	.handle_irq	= icoll_handle_irq,
 	.timer		= &imx23_timer,
 	.init_machine	= mxs_machine_init,
 	.dt_compat	= imx23_dt_compat,
@@ -430,7 +398,8 @@ MACHINE_END
 
 DT_MACHINE_START(IMX28, "Freescale i.MX28 (Device Tree)")
 	.map_io		= mx28_map_io,
-	.init_irq	= mxs_dt_init_irq,
+	.init_irq	= icoll_init_irq,
+	.handle_irq	= icoll_handle_irq,
 	.timer		= &imx28_timer,
 	.init_machine	= mxs_machine_init,
 	.dt_compat	= imx28_dt_compat,

diff --git a/arch/arm/mach-mxs/timer.c b/arch/arm/mach-mxs/timer.c
@@ -25,6 +25,8 @@
 #include <linux/irq.h>
 #include <linux/clockchips.h>
 #include <linux/clk.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
 
 #include <asm/mach/time.h>
 #include <mach/mxs.h>
@@ -244,9 +246,17 @@ static int __init mxs_clocksource_init(struct clk *timer_clk)
 	return 0;
 }
 
-void __init mxs_timer_init(int irq)
+void __init mxs_timer_init(void)
 {
+	struct device_node *np;
 	struct clk *timer_clk;
+	int irq;
+
+	np = of_find_compatible_node(NULL, NULL, "fsl,timrot");
+	if (!np) {
+		pr_err("%s: failed find timrot node\n", __func__);
+		return;
+	}
 
 	timer_clk = clk_get_sys("timrot", NULL);
 	if (IS_ERR(timer_clk)) {
@@ -295,5 +305,6 @@ void __init mxs_timer_init(int irq)
 	mxs_clockevent_init(timer_clk);
 
 	/* Make irqs happen */
+	irq = irq_of_parse_and_map(np, 0);
 	setup_irq(irq, &mxs_timer_irq);
 }
diff --git a/drivers/clk/mxs/clk-imx23.c b/drivers/clk/mxs/clk-imx23.c
@@ -165,7 +165,7 @@ int __init mx23_clocks_init(void)
 	for (i = 0; i < ARRAY_SIZE(clks_init_on); i++)
 		clk_prepare_enable(clks[clks_init_on[i]]);
 
-	mxs_timer_init(MX23_INT_TIMER0);
+	mxs_timer_init();
 
 	return 0;
 }
diff --git a/drivers/clk/mxs/clk-imx28.c b/drivers/clk/mxs/clk-imx28.c
@@ -244,7 +244,7 @@ int __init mx28_clocks_init(void)
 	for (i = 0; i < ARRAY_SIZE(clks_init_on); i++)
 		clk_prepare_enable(clks[clks_init_on[i]]);
 
-	mxs_timer_init(MX28_INT_TIMER0);
+	mxs_timer_init();
 
 	return 0;
 }