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author | Viresh Kumar <viresh.kumar@st.com> | 2012-04-21 07:45:37 (GMT) |
---|---|---|
committer | Arnd Bergmann <arnd@arndb.de> | 2012-05-12 19:03:26 (GMT) |
commit | 30551c0108e0d2fed48778a6bbd52843088bcb7b (patch) | |
tree | b26eba9ad07964e76465bddb42474e25c4690597 | |
parent | fa599c333d3d66846545026b41bcf36d1350fe30 (diff) | |
download | linux-30551c0108e0d2fed48778a6bbd52843088bcb7b.tar.xz |
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>
-rw-r--r-- | Documentation/devicetree/bindings/arm/spear-timer.txt | 18 | ||||
-rw-r--r-- | arch/arm/boot/dts/spear3xx.dtsi | 6 | ||||
-rw-r--r-- | arch/arm/boot/dts/spear600.dtsi | 6 | ||||
-rw-r--r-- | arch/arm/mach-spear3xx/include/mach/generic.h | 2 | ||||
-rw-r--r-- | arch/arm/mach-spear3xx/include/mach/irqs.h | 1 | ||||
-rw-r--r-- | arch/arm/mach-spear3xx/include/mach/spear.h | 1 | ||||
-rw-r--r-- | arch/arm/mach-spear3xx/spear3xx.c | 2 | ||||
-rw-r--r-- | arch/arm/mach-spear6xx/include/mach/generic.h | 2 | ||||
-rw-r--r-- | arch/arm/mach-spear6xx/include/mach/irqs.h | 3 | ||||
-rw-r--r-- | arch/arm/mach-spear6xx/include/mach/spear.h | 1 | ||||
-rw-r--r-- | arch/arm/mach-spear6xx/spear6xx.c | 2 | ||||
-rw-r--r-- | arch/arm/plat-spear/time.c | 31 |
12 files changed, 56 insertions, 19 deletions
diff --git a/Documentation/devicetree/bindings/arm/spear-timer.txt b/Documentation/devicetree/bindings/arm/spear-timer.txt new file mode 100644 index 0000000..c001722 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/spear-timer.txt @@ -0,0 +1,18 @@ +* SPEAr ARM Timer + +** Timer node required properties: + +- compatible : Should be: + "st,spear-timer" +- reg: Address range of the timer registers +- interrupt-parent: Should be the phandle for the interrupt controller + that services interrupts for this device +- interrupt: Should contain the timer interrupt number + +Example: + + timer@f0000000 { + compatible = "st,spear-timer"; + reg = <0xf0000000 0x400>; + interrupts = <2>; + }; diff --git a/arch/arm/boot/dts/spear3xx.dtsi b/arch/arm/boot/dts/spear3xx.dtsi index 0ae7c8e..9107255 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 d777e3a..089f0a4 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 e4f4d72..efb6935 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 319620a..51bd62a 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 6d4dadc..04da906 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 bbb11ef..25c6c67 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 7167fd3..65514b1 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 2b73538..37a5c41 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 d278ed0..cb8ed2f 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 de194db..7ae4d5b 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 a3164d1..9a37898 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); } |