diff --git a/Documentation/devicetree/bindings/arm/msm/timer.txt b/Documentation/devicetree/bindings/arm/msm/timer.txt index 8c5907b9cae84724ab30500cff9772838d8975d6..c6ef8f13dc7edd92eee2e2f64c25d9ea74ca09b0 100644 --- a/Documentation/devicetree/bindings/arm/msm/timer.txt +++ b/Documentation/devicetree/bindings/arm/msm/timer.txt @@ -3,36 +3,35 @@ Properties: - compatible : Should at least contain "qcom,msm-timer". More specific - properties such as "qcom,msm-gpt" and "qcom,msm-dgt" specify a general - purpose timer and a debug timer respectively. + properties specify which subsystem the timers are paired with. -- interrupts : Interrupt indicating a match event. + "qcom,kpss-timer" - krait subsystem + "qcom,scss-timer" - scorpion subsystem -- reg : Specifies the base address of the timer registers. The second region - specifies an optional register used to configure the clock divider. +- interrupts : Interrupts for the the debug timer, the first general purpose + timer, and optionally a second general purpose timer in that + order. -- clock-frequency : The frequency of the timer in Hz. +- reg : Specifies the base address of the timer registers. + +- clock-frequency : The frequency of the debug timer and the general purpose + timer(s) in Hz in that order. Optional: - cpu-offset : per-cpu offset used when the timer is accessed without the - CPU remapping facilities. The offset is cpu-offset * cpu-nr. + CPU remapping facilities. The offset is + cpu-offset + (0x10000 * cpu-nr). Example: - timer@200a004 { - compatible = "qcom,msm-gpt", "qcom,msm-timer"; - interrupts = <1 2 0x301>; - reg = <0x0200a004 0x10>; - clock-frequency = <32768>; - cpu-offset = <0x40000>; - }; - - timer@200a024 { - compatible = "qcom,msm-dgt", "qcom,msm-timer"; - interrupts = <1 3 0x301>; - reg = <0x0200a024 0x10>, - <0x0200a034 0x4>; - clock-frequency = <6750000>; + timer@200a000 { + compatible = "qcom,scss-timer", "qcom,msm-timer"; + interrupts = <1 1 0x301>, + <1 2 0x301>, + <1 3 0x301>; + reg = <0x0200a000 0x100>; + clock-frequency = <19200000>, + <32768>; cpu-offset = <0x40000>; }; diff --git a/arch/arm/boot/dts/msm8660-surf.dts b/arch/arm/boot/dts/msm8660-surf.dts index 31f2157cd7d700beeaf904cc0f4bfa2bd0783492..743ef42df23ee7d8dbe213be9863c5be18f1fd91 100644 --- a/arch/arm/boot/dts/msm8660-surf.dts +++ b/arch/arm/boot/dts/msm8660-surf.dts @@ -16,19 +16,13 @@ }; timer@2000004 { - compatible = "qcom,msm-gpt", "qcom,msm-timer"; - interrupts = <1 1 0x301>; - reg = <0x02000004 0x10>; - clock-frequency = <32768>; - cpu-offset = <0x40000>; - }; - - timer@2000024 { - compatible = "qcom,msm-dgt", "qcom,msm-timer"; - interrupts = <1 0 0x301>; - reg = <0x02000024 0x10>, - <0x02000034 0x4>; - clock-frequency = <6750000>; + compatible = "qcom,scss-timer", "qcom,msm-timer"; + interrupts = <1 0 0x301>, + <1 1 0x301>, + <1 2 0x301>; + reg = <0x02000000 0x100>; + clock-frequency = <27000000>, + <32768>; cpu-offset = <0x40000>; }; diff --git a/arch/arm/boot/dts/msm8960-cdp.dts b/arch/arm/boot/dts/msm8960-cdp.dts index 9e621b5ad3ddf4e1996ef3cb2c72e3cfbdbe0a4a..3ae51fb02e17c75e9fa425ddc0cd9798cd4e1347 100644 --- a/arch/arm/boot/dts/msm8960-cdp.dts +++ b/arch/arm/boot/dts/msm8960-cdp.dts @@ -15,20 +15,14 @@ < 0x02002000 0x1000 >; }; - timer@200a004 { - compatible = "qcom,msm-gpt", "qcom,msm-timer"; - interrupts = <1 2 0x301>; - reg = <0x0200a004 0x10>; - clock-frequency = <32768>; - cpu-offset = <0x80000>; - }; - - timer@200a024 { - compatible = "qcom,msm-dgt", "qcom,msm-timer"; - interrupts = <1 1 0x301>; - reg = <0x0200a024 0x10>, - <0x0200a034 0x4>; - clock-frequency = <6750000>; + timer@200a000 { + compatible = "qcom,kpss-timer", "qcom,msm-timer"; + interrupts = <1 1 0x301>, + <1 2 0x301>, + <1 3 0x301>; + reg = <0x0200a000 0x100>; + clock-frequency = <27000000>, + <32768>; cpu-offset = <0x80000>; }; diff --git a/arch/arm/mach-msm/timer.c b/arch/arm/mach-msm/timer.c index 2969027f02fa57045ec7bb3d65d7a98927cfde3c..165e33b9b1ee3fa0eb10f3e454f3a7bc78737ea8 100644 --- a/arch/arm/mach-msm/timer.c +++ b/arch/arm/mach-msm/timer.c @@ -36,6 +36,7 @@ #define TIMER_ENABLE_CLR_ON_MATCH_EN BIT(1) #define TIMER_ENABLE_EN BIT(0) #define TIMER_CLEAR 0x000C +#define DGT_CLK_CTL 0x10 #define DGT_CLK_CTL_DIV_4 0x3 #define GPT_HZ 32768 @@ -214,13 +215,9 @@ static void __init msm_timer_init(u32 dgt_hz, int sched_bits, int irq, } #ifdef CONFIG_OF -static const struct of_device_id msm_dgt_match[] __initconst = { - { .compatible = "qcom,msm-dgt" }, - { }, -}; - -static const struct of_device_id msm_gpt_match[] __initconst = { - { .compatible = "qcom,msm-gpt" }, +static const struct of_device_id msm_timer_match[] __initconst = { + { .compatible = "qcom,kpss-timer" }, + { .compatible = "qcom,scss-timer" }, { }, }; @@ -231,33 +228,29 @@ void __init msm_dt_timer_init(void) int irq; struct resource res; u32 percpu_offset; - void __iomem *dgt_clk_ctl; + void __iomem *base; + void __iomem *cpu0_base; - np = of_find_matching_node(NULL, msm_gpt_match); + np = of_find_matching_node(NULL, msm_timer_match); if (!np) { - pr_err("Can't find GPT DT node\n"); + pr_err("Can't find msm timer DT node\n"); return; } - event_base = of_iomap(np, 0); - if (!event_base) { + base = of_iomap(np, 0); + if (!base) { pr_err("Failed to map event base\n"); return; } - irq = irq_of_parse_and_map(np, 0); + /* We use GPT0 for the clockevent */ + irq = irq_of_parse_and_map(np, 1); if (irq <= 0) { pr_err("Can't get irq\n"); return; } - of_node_put(np); - - np = of_find_matching_node(NULL, msm_dgt_match); - if (!np) { - pr_err("Can't find DGT DT node\n"); - return; - } + /* We use CPU0's DGT for the clocksource */ if (of_property_read_u32(np, "cpu-offset", &percpu_offset)) percpu_offset = 0; @@ -266,45 +259,39 @@ void __init msm_dt_timer_init(void) return; } - source_base = ioremap(res.start + percpu_offset, resource_size(&res)); - if (!source_base) { + cpu0_base = ioremap(res.start + percpu_offset, resource_size(&res)); + if (!cpu0_base) { pr_err("Failed to map source base\n"); return; } - if (!of_address_to_resource(np, 1, &res)) { - dgt_clk_ctl = ioremap(res.start + percpu_offset, - resource_size(&res)); - if (!dgt_clk_ctl) { - pr_err("Failed to map DGT control base\n"); - return; - } - writel_relaxed(DGT_CLK_CTL_DIV_4, dgt_clk_ctl); - iounmap(dgt_clk_ctl); - } - if (of_property_read_u32(np, "clock-frequency", &freq)) { pr_err("Unknown frequency\n"); return; } of_node_put(np); + event_base = base + 0x4; + source_base = cpu0_base + 0x24; + freq /= 4; + writel_relaxed(DGT_CLK_CTL_DIV_4, source_base + DGT_CLK_CTL); + msm_timer_init(freq, 32, irq, !!percpu_offset); } #endif -static int __init msm_timer_map(phys_addr_t event, phys_addr_t source) +static int __init msm_timer_map(phys_addr_t addr, u32 event, u32 source) { - event_base = ioremap(event, SZ_64); - if (!event_base) { - pr_err("Failed to map event base\n"); - return 1; - } - source_base = ioremap(source, SZ_64); - if (!source_base) { - pr_err("Failed to map source base\n"); - return 1; + void __iomem *base; + + base = ioremap(addr, SZ_256); + if (!base) { + pr_err("Failed to map timer base\n"); + return -ENOMEM; } + event_base = base + event; + source_base = base + source; + return 0; } @@ -312,7 +299,7 @@ void __init msm7x01_timer_init(void) { struct clocksource *cs = &msm_clocksource; - if (msm_timer_map(0xc0100000, 0xc0100010)) + if (msm_timer_map(0xc0100000, 0x0, 0x10)) return; cs->read = msm_read_timer_count_shift; cs->mask = CLOCKSOURCE_MASK((32 - MSM_DGT_SHIFT)); @@ -323,14 +310,14 @@ void __init msm7x01_timer_init(void) void __init msm7x30_timer_init(void) { - if (msm_timer_map(0xc0100004, 0xc0100024)) + if (msm_timer_map(0xc0100000, 0x4, 0x24)) return; msm_timer_init(24576000 / 4, 32, 1, false); } void __init qsd8x50_timer_init(void) { - if (msm_timer_map(0xAC100000, 0xAC100010)) + if (msm_timer_map(0xAC100000, 0x0, 0x10)) return; msm_timer_init(19200000 / 4, 32, 7, false); }