SPEAr: Add DT bindings for SPEAr's timer

All SPEAr SoC's use ST's Timer module. This patch adds device tree probing
capability for that.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

11 files changed, 38 insertions, 19 deletions

diff --git a/arch/arm/boot/dts/spear3xx.dtsi b/arch/arm/boot/dts/spear3xx.dtsi
index 0ae7c8e86311..91072553963f 100644
--- a/arch/arm/boot/dts/spear3xx.dtsi
+++ b/arch/arm/boot/dts/spear3xx.dtsi
@@ -139,6 +139,12 @@
                                 interrupts = <12>;
                                 status = "disabled";
                         };
+
+                        timer@f0000000 {
+                                compatible = "st,spear-timer";
+                                reg = <0xf0000000 0x400>;
+                                interrupts = <2>;
+                        };
                 };
         };
 };
diff --git a/arch/arm/boot/dts/spear600.dtsi b/arch/arm/boot/dts/spear600.dtsi
index d777e3a6f178..089f0a42c50e 100644
--- a/arch/arm/boot/dts/spear600.dtsi
+++ b/arch/arm/boot/dts/spear600.dtsi
@@ -177,6 +177,12 @@
                                 interrupts = <28>;
                                 status = "disabled";
                         };
+
+                        timer@f0000000 {
+                                compatible = "st,spear-timer";
+                                reg = <0xf0000000 0x400>;
+                                interrupts = <16>;
+                        };
                 };
         };
 };
diff --git a/arch/arm/mach-spear3xx/include/mach/generic.h b/arch/arm/mach-spear3xx/include/mach/generic.h
index e4f4d721cda2..efb69357429a 100644
--- a/arch/arm/mach-spear3xx/include/mach/generic.h
+++ b/arch/arm/mach-spear3xx/include/mach/generic.h
@@ -28,7 +28,7 @@ extern struct pl022_ssp_controller pl022_plat_data;
 extern struct pl08x_platform_data pl080_plat_data;
 
 /* Add spear3xx family function declarations here */
-void __init spear_setup_timer(resource_size_t base, int irq);
+void __init spear_setup_of_timer(void);
 void __init spear3xx_map_io(void);
 void __init spear3xx_dt_init_irq(void);
 
diff --git a/arch/arm/mach-spear3xx/include/mach/irqs.h b/arch/arm/mach-spear3xx/include/mach/irqs.h
index 319620a1afb4..51bd62a0254c 100644
--- a/arch/arm/mach-spear3xx/include/mach/irqs.h
+++ b/arch/arm/mach-spear3xx/include/mach/irqs.h
@@ -16,7 +16,6 @@
 
 /* FIXME: probe all these from DT */
 #define SPEAR3XX_IRQ_INTRCOMM_RAS_ARM           1
-#define SPEAR3XX_IRQ_CPU_GPT1_1                 2
 #define SPEAR3XX_IRQ_GEN_RAS_1                  28
 #define SPEAR3XX_IRQ_GEN_RAS_2                  29
 #define SPEAR3XX_IRQ_GEN_RAS_3                  30
diff --git a/arch/arm/mach-spear3xx/include/mach/spear.h b/arch/arm/mach-spear3xx/include/mach/spear.h
index 6d4dadc67633..04da906b0d4c 100644
--- a/arch/arm/mach-spear3xx/include/mach/spear.h
+++ b/arch/arm/mach-spear3xx/include/mach/spear.h
@@ -26,7 +26,6 @@
 /* ML1 - Multi Layer CPU Subsystem */
 #define SPEAR3XX_ICM3_ML1_2_BASE        UL(0xF0000000)
 #define VA_SPEAR6XX_ML_CPU_BASE         UL(0xF0000000)
-#define SPEAR3XX_CPU_TMR_BASE           UL(0xF0000000)
 
 /* ICM3 - Basic Subsystem */
 #define SPEAR3XX_ICM3_SMI_CTRL_BASE     UL(0xFC000000)
diff --git a/arch/arm/mach-spear3xx/spear3xx.c b/arch/arm/mach-spear3xx/spear3xx.c
index bbb11efa6056..25c6c67d5b07 100644
--- a/arch/arm/mach-spear3xx/spear3xx.c
+++ b/arch/arm/mach-spear3xx/spear3xx.c
@@ -534,7 +534,7 @@ static void __init spear3xx_timer_init(void)
         clk_put(gpt_clk);
         clk_put(pclk);
 
-        spear_setup_timer(SPEAR3XX_CPU_TMR_BASE, SPEAR3XX_IRQ_CPU_GPT1_1);
+        spear_setup_of_timer();
 }
 
 struct sys_timer spear3xx_timer = {
diff --git a/arch/arm/mach-spear6xx/include/mach/generic.h b/arch/arm/mach-spear6xx/include/mach/generic.h
index 7167fd331d86..65514b159370 100644
--- a/arch/arm/mach-spear6xx/include/mach/generic.h
+++ b/arch/arm/mach-spear6xx/include/mach/generic.h
@@ -16,7 +16,7 @@
 
 #include <linux/init.h>
 
-void __init spear_setup_timer(resource_size_t base, int irq);
+void __init spear_setup_of_timer(void);
 void spear_restart(char, const char *);
 void __init spear6xx_clk_init(void);
 
diff --git a/arch/arm/mach-spear6xx/include/mach/irqs.h b/arch/arm/mach-spear6xx/include/mach/irqs.h
index 2b735389e74b..37a5c411a866 100644
--- a/arch/arm/mach-spear6xx/include/mach/irqs.h
+++ b/arch/arm/mach-spear6xx/include/mach/irqs.h
@@ -16,9 +16,6 @@
 
 /* IRQ definitions */
 /* VIC 1 */
-/* FIXME: probe this from DT */
-#define IRQ_CPU_GPT1_1                          16
-
 #define IRQ_VIC_END                             64
 
 /* GPIO pins virtual irqs */
diff --git a/arch/arm/mach-spear6xx/include/mach/spear.h b/arch/arm/mach-spear6xx/include/mach/spear.h
index d278ed047a53..cb8ed2f4dc85 100644
--- a/arch/arm/mach-spear6xx/include/mach/spear.h
+++ b/arch/arm/mach-spear6xx/include/mach/spear.h
@@ -25,7 +25,6 @@
 /* ML-1, 2 - Multi Layer CPU Subsystem */
 #define SPEAR6XX_ML_CPU_BASE            UL(0xF0000000)
 #define VA_SPEAR6XX_ML_CPU_BASE         UL(0xF0000000)
-#define SPEAR6XX_CPU_TMR_BASE           UL(0xF0000000)
 
 /* ICM3 - Basic Subsystem */
 #define SPEAR6XX_ICM3_SMI_CTRL_BASE     UL(0xFC000000)
diff --git a/arch/arm/mach-spear6xx/spear6xx.c b/arch/arm/mach-spear6xx/spear6xx.c
index de194dbb8371..7ae4d5be6cb5 100644
--- a/arch/arm/mach-spear6xx/spear6xx.c
+++ b/arch/arm/mach-spear6xx/spear6xx.c
@@ -448,7 +448,7 @@ static void __init spear6xx_timer_init(void)
         clk_put(gpt_clk);
         clk_put(pclk);
 
-        spear_setup_timer(SPEAR6XX_CPU_TMR_BASE, IRQ_CPU_GPT1_1);
+        spear_setup_of_timer();
 }
 
 struct sys_timer spear6xx_timer = {
diff --git a/arch/arm/plat-spear/time.c b/arch/arm/plat-spear/time.c
index a3164d1647fd..9a378987bbb1 100644
--- a/arch/arm/plat-spear/time.c
+++ b/arch/arm/plat-spear/time.c
@@ -18,6 +18,8 @@
 #include <linux/ioport.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
 #include <linux/time.h>
 #include <linux/irq.h>
 #include <asm/mach/time.h>
@@ -197,19 +199,32 @@ static void __init spear_clockevent_init(int irq)
         setup_irq(irq, &spear_timer_irq);
 }
 
-void __init spear_setup_timer(resource_size_t base, int irq)
+const static struct of_device_id timer_of_match[] __initconst = {
+        { .compatible = "st,spear-timer", },
+        { },
+};
+
+void __init spear_setup_of_timer(void)
 {
-        int ret;
+        struct device_node *np;
+        int irq, ret;
+
+        np = of_find_matching_node(NULL, timer_of_match);
+        if (!np) {
+                pr_err("%s: No timer passed via DT\n", __func__);
+                return;
+        }
 
-        if (!request_mem_region(base, SZ_1K, "gpt0")) {
-                pr_err("%s:cannot get IO addr\n", __func__);
+        irq = irq_of_parse_and_map(np, 0);
+        if (!irq) {
+                pr_err("%s: No irq passed for timer via DT\n", __func__);
                 return;
         }
 
-        gpt_base = ioremap(base, SZ_1K);
+        gpt_base = of_iomap(np, 0);
         if (!gpt_base) {
-                pr_err("%s:ioremap failed for gpt\n", __func__);
-                goto err_mem;
+                pr_err("%s: of iomap failed\n", __func__);
+                return;
         }
 
         gpt_clk = clk_get_sys("gpt0", NULL);
@@ -233,6 +248,4 @@ err_clk:
         clk_put(gpt_clk);
 err_iomap:
         iounmap(gpt_base);
-err_mem:
-        release_mem_region(base, SZ_1K);
 }