From: fu.wei@linaro.org To: rjw@rjwysocki.net, lenb@kernel.org, daniel.lezcano@linaro.org, tglx@linutronix.de, marc.zyngier@arm.com, mark.rutland@arm.com, lorenzo.pieralisi@arm.com, sudeep.holla@arm.com, hanjun.guo@linaro.org Cc: linux-arm-kernel@lists.infradead.org, linaro-acpi@lists.linaro.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, rruigrok@codeaurora.org, harba@codeaurora.org, cov@codeaurora.org, timur@codeaurora.org, graeme.gregory@linaro.org, al.stone@linaro.org, jcm@redhat.com, wei@redhat.com, arnd@arndb.de, catalin.marinas@arm.com, will.deacon@arm.com, Suravee.Suthikulpanit@amd.com, leo.duran@amd.com, wim@iguana.be, linux@roeck-us.net, linux-watchdog@vger.kernel.org, tn@semihalf.com, christoffer.dall@linaro.org, julien.grall@arm.com, Fu Wei <fu.wei@linaro.org> Subject: [PATCH v19 10/15] clocksource/drivers/arm_arch_timer: Refactor the timer init code to prepare for GTDT Date: Wed, 21 Dec 2016 14:45:58 +0800 [thread overview] Message-ID: <20161221064603.11830-11-fu.wei@linaro.org> (raw) In-Reply-To: <20161221064603.11830-1-fu.wei@linaro.org> From: Fu Wei <fu.wei@linaro.org> The patch refactor original memory-mapped timer init code: (1) Refactor "arch_timer_mem_init", make it become a common code for memory-mapped timer init. (2) Add a new function "arch_timer_mem_of_init" for DT init. Signed-off-by: Fu Wei <fu.wei@linaro.org> --- drivers/clocksource/arm_arch_timer.c | 135 ++++++++++++++++++++++++----------- 1 file changed, 92 insertions(+), 43 deletions(-) diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index 9113df8..b10cc26 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -922,17 +922,17 @@ static int __init arch_timer_of_init(struct device_node *np) CLOCKSOURCE_OF_DECLARE(armv7_arch_timer, "arm,armv7-timer", arch_timer_of_init); CLOCKSOURCE_OF_DECLARE(armv8_arch_timer, "arm,armv8-timer", arch_timer_of_init); -static int __init arch_timer_mem_init(struct device_node *np) +static int __init arch_timer_mem_init(struct arch_timer_mem *timer_mem) { - struct device_node *frame, *best_frame = NULL; void __iomem *cntctlbase, *base; - unsigned int irq, ret = -EINVAL; + struct arch_timer_mem_frame *best_frame = NULL; + unsigned int irq; u32 cnttidr; + int i, ret; - arch_timers_present |= ARCH_TIMER_TYPE_MEM; - cntctlbase = of_iomap(np, 0); + cntctlbase = ioremap(timer_mem->cntctlbase, timer_mem->size); if (!cntctlbase) { - pr_err("Can't find CNTCTLBase\n"); + pr_err("Can't map CNTCTLBase.\n"); return -ENXIO; } @@ -942,26 +942,18 @@ static int __init arch_timer_mem_init(struct device_node *np) * Try to find a virtual capable frame. Otherwise fall back to a * physical capable frame. */ - for_each_available_child_of_node(np, frame) { - int n; - u32 cntacr; - - if (of_property_read_u32(frame, "frame-number", &n)) { - pr_err("Missing frame-number\n"); - of_node_put(frame); - goto out; - } + for (i = 0; i < timer_mem->num_frames; i++) { + u32 cntacr = CNTACR_RFRQ | CNTACR_RWPT | CNTACR_RPCT | + CNTACR_RWVT | CNTACR_RVOFF | CNTACR_RVCT; + int n = timer_mem->frame[i].frame_nr; /* Try enabling everything, and see what sticks */ - cntacr = CNTACR_RFRQ | CNTACR_RWPT | CNTACR_RPCT | - CNTACR_RWVT | CNTACR_RVOFF | CNTACR_RVCT; writel_relaxed(cntacr, cntctlbase + CNTACR(n)); cntacr = readl_relaxed(cntctlbase + CNTACR(n)); if ((cnttidr & CNTTIDR_VIRT(n)) && !(~cntacr & (CNTACR_RWVT | CNTACR_RVCT))) { - of_node_put(best_frame); - best_frame = frame; + best_frame = &timer_mem->frame[i]; arch_timer_mem_use_virtual = true; break; } @@ -969,51 +961,108 @@ static int __init arch_timer_mem_init(struct device_node *np) if (~cntacr & (CNTACR_RWPT | CNTACR_RPCT)) continue; - of_node_put(best_frame); - best_frame = of_node_get(frame); + best_frame = &timer_mem->frame[i]; } + iounmap(cntctlbase); - ret= -ENXIO; - base = arch_counter_base = of_io_request_and_map(best_frame, 0, - "arch_mem_timer"); - if (IS_ERR(base)) { - pr_err("Can't map frame's registers\n"); - goto out; + if (!best_frame) { + pr_err("Can't find frame for register\n"); + return -EINVAL; } if (arch_timer_mem_use_virtual) - irq = irq_of_parse_and_map(best_frame, ARCH_TIMER_VIRT_SPI); + irq = best_frame->virt_irq; else - irq = irq_of_parse_and_map(best_frame, ARCH_TIMER_PHYS_SPI); + irq = best_frame->phys_irq; - ret = -EINVAL; if (!irq) { pr_err("Frame missing %s irq.\n", arch_timer_mem_use_virtual ? "virt" : "phys"); - goto out; + return -EINVAL; } - /* - * Try to determine the frequency from the device tree, - * if fail, get the frequency from CNTFRQ. - */ - if (!arch_timer_rate && - of_property_read_u32(np, "clock-frequency", &arch_timer_rate)) - arch_timer_mem_detect_rate(base); + if (!request_mem_region(best_frame->cntbase, best_frame->size, + "arch_mem_timer")) + return -EBUSY; + + base = ioremap(best_frame->cntbase, best_frame->size); + if (!base) { + pr_err("Can't map frame's registers\n"); + return -ENXIO; + } + + arch_timer_mem_detect_rate(base); ret = arch_timer_mem_register(base, irq); - if (ret) + if (ret) { + iounmap(base); + return ret; + } + + arch_counter_base = base; + arch_timers_present |= ARCH_TIMER_TYPE_MEM; + + return 0; +} + +static int __init arch_timer_mem_of_init(struct device_node *np) +{ + struct arch_timer_mem *timer_mem; + struct device_node *frame_node; + struct resource res; + int i, ret = -EINVAL; + + timer_mem = kzalloc(sizeof(*timer_mem), GFP_KERNEL); + if (!timer_mem) + return -ENOMEM; + + if (of_address_to_resource(np, 0, &res)) goto out; + timer_mem->cntctlbase = res.start; + timer_mem->size = resource_size(&res); + + i = 0; + for_each_available_child_of_node(np, frame_node) { + int n; + struct arch_timer_mem_frame *frame = &timer_mem->frame[i]; + + if (of_property_read_u32(frame_node, "frame-number", &n)) { + pr_err("Missing frame-number\n"); + of_node_put(frame_node); + goto out; + } + frame->frame_nr = n; + + if (of_address_to_resource(frame_node, 0, &res)) { + of_node_put(frame_node); + goto out; + } + frame->cntbase = res.start; + frame->size = resource_size(&res); + + frame->virt_irq = irq_of_parse_and_map(frame_node, + ARCH_TIMER_VIRT_SPI); + frame->phys_irq = irq_of_parse_and_map(frame_node, + ARCH_TIMER_PHYS_SPI); - if (!arch_timer_needs_of_probing()) + if (++i >= ARCH_TIMER_MEM_MAX_FRAMES) + break; + } + timer_mem->num_frames = i; + + /* Try to determine the frequency from the device tree */ + if (!arch_timer_rate) + of_property_read_u32(np, "clock-frequency", &arch_timer_rate); + + ret = arch_timer_mem_init(timer_mem); + if (!ret && !arch_timer_needs_of_probing()) ret = arch_timer_common_init(); out: - iounmap(cntctlbase); - of_node_put(best_frame); + kfree(timer_mem); return ret; } CLOCKSOURCE_OF_DECLARE(armv7_arch_timer_mem, "arm,armv7-timer-mem", - arch_timer_mem_init); + arch_timer_mem_of_init); #ifdef CONFIG_ACPI static int __init map_generic_timer_interrupt(u32 interrupt, u32 flags) -- 2.9.3
WARNING: multiple messages have this Message-ID (diff)
From: fu.wei@linaro.org (fu.wei at linaro.org) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v19 10/15] clocksource/drivers/arm_arch_timer: Refactor the timer init code to prepare for GTDT Date: Wed, 21 Dec 2016 14:45:58 +0800 [thread overview] Message-ID: <20161221064603.11830-11-fu.wei@linaro.org> (raw) In-Reply-To: <20161221064603.11830-1-fu.wei@linaro.org> From: Fu Wei <fu.wei@linaro.org> The patch refactor original memory-mapped timer init code: (1) Refactor "arch_timer_mem_init", make it become a common code for memory-mapped timer init. (2) Add a new function "arch_timer_mem_of_init" for DT init. Signed-off-by: Fu Wei <fu.wei@linaro.org> --- drivers/clocksource/arm_arch_timer.c | 135 ++++++++++++++++++++++++----------- 1 file changed, 92 insertions(+), 43 deletions(-) diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index 9113df8..b10cc26 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -922,17 +922,17 @@ static int __init arch_timer_of_init(struct device_node *np) CLOCKSOURCE_OF_DECLARE(armv7_arch_timer, "arm,armv7-timer", arch_timer_of_init); CLOCKSOURCE_OF_DECLARE(armv8_arch_timer, "arm,armv8-timer", arch_timer_of_init); -static int __init arch_timer_mem_init(struct device_node *np) +static int __init arch_timer_mem_init(struct arch_timer_mem *timer_mem) { - struct device_node *frame, *best_frame = NULL; void __iomem *cntctlbase, *base; - unsigned int irq, ret = -EINVAL; + struct arch_timer_mem_frame *best_frame = NULL; + unsigned int irq; u32 cnttidr; + int i, ret; - arch_timers_present |= ARCH_TIMER_TYPE_MEM; - cntctlbase = of_iomap(np, 0); + cntctlbase = ioremap(timer_mem->cntctlbase, timer_mem->size); if (!cntctlbase) { - pr_err("Can't find CNTCTLBase\n"); + pr_err("Can't map CNTCTLBase.\n"); return -ENXIO; } @@ -942,26 +942,18 @@ static int __init arch_timer_mem_init(struct device_node *np) * Try to find a virtual capable frame. Otherwise fall back to a * physical capable frame. */ - for_each_available_child_of_node(np, frame) { - int n; - u32 cntacr; - - if (of_property_read_u32(frame, "frame-number", &n)) { - pr_err("Missing frame-number\n"); - of_node_put(frame); - goto out; - } + for (i = 0; i < timer_mem->num_frames; i++) { + u32 cntacr = CNTACR_RFRQ | CNTACR_RWPT | CNTACR_RPCT | + CNTACR_RWVT | CNTACR_RVOFF | CNTACR_RVCT; + int n = timer_mem->frame[i].frame_nr; /* Try enabling everything, and see what sticks */ - cntacr = CNTACR_RFRQ | CNTACR_RWPT | CNTACR_RPCT | - CNTACR_RWVT | CNTACR_RVOFF | CNTACR_RVCT; writel_relaxed(cntacr, cntctlbase + CNTACR(n)); cntacr = readl_relaxed(cntctlbase + CNTACR(n)); if ((cnttidr & CNTTIDR_VIRT(n)) && !(~cntacr & (CNTACR_RWVT | CNTACR_RVCT))) { - of_node_put(best_frame); - best_frame = frame; + best_frame = &timer_mem->frame[i]; arch_timer_mem_use_virtual = true; break; } @@ -969,51 +961,108 @@ static int __init arch_timer_mem_init(struct device_node *np) if (~cntacr & (CNTACR_RWPT | CNTACR_RPCT)) continue; - of_node_put(best_frame); - best_frame = of_node_get(frame); + best_frame = &timer_mem->frame[i]; } + iounmap(cntctlbase); - ret= -ENXIO; - base = arch_counter_base = of_io_request_and_map(best_frame, 0, - "arch_mem_timer"); - if (IS_ERR(base)) { - pr_err("Can't map frame's registers\n"); - goto out; + if (!best_frame) { + pr_err("Can't find frame for register\n"); + return -EINVAL; } if (arch_timer_mem_use_virtual) - irq = irq_of_parse_and_map(best_frame, ARCH_TIMER_VIRT_SPI); + irq = best_frame->virt_irq; else - irq = irq_of_parse_and_map(best_frame, ARCH_TIMER_PHYS_SPI); + irq = best_frame->phys_irq; - ret = -EINVAL; if (!irq) { pr_err("Frame missing %s irq.\n", arch_timer_mem_use_virtual ? "virt" : "phys"); - goto out; + return -EINVAL; } - /* - * Try to determine the frequency from the device tree, - * if fail, get the frequency from CNTFRQ. - */ - if (!arch_timer_rate && - of_property_read_u32(np, "clock-frequency", &arch_timer_rate)) - arch_timer_mem_detect_rate(base); + if (!request_mem_region(best_frame->cntbase, best_frame->size, + "arch_mem_timer")) + return -EBUSY; + + base = ioremap(best_frame->cntbase, best_frame->size); + if (!base) { + pr_err("Can't map frame's registers\n"); + return -ENXIO; + } + + arch_timer_mem_detect_rate(base); ret = arch_timer_mem_register(base, irq); - if (ret) + if (ret) { + iounmap(base); + return ret; + } + + arch_counter_base = base; + arch_timers_present |= ARCH_TIMER_TYPE_MEM; + + return 0; +} + +static int __init arch_timer_mem_of_init(struct device_node *np) +{ + struct arch_timer_mem *timer_mem; + struct device_node *frame_node; + struct resource res; + int i, ret = -EINVAL; + + timer_mem = kzalloc(sizeof(*timer_mem), GFP_KERNEL); + if (!timer_mem) + return -ENOMEM; + + if (of_address_to_resource(np, 0, &res)) goto out; + timer_mem->cntctlbase = res.start; + timer_mem->size = resource_size(&res); + + i = 0; + for_each_available_child_of_node(np, frame_node) { + int n; + struct arch_timer_mem_frame *frame = &timer_mem->frame[i]; + + if (of_property_read_u32(frame_node, "frame-number", &n)) { + pr_err("Missing frame-number\n"); + of_node_put(frame_node); + goto out; + } + frame->frame_nr = n; + + if (of_address_to_resource(frame_node, 0, &res)) { + of_node_put(frame_node); + goto out; + } + frame->cntbase = res.start; + frame->size = resource_size(&res); + + frame->virt_irq = irq_of_parse_and_map(frame_node, + ARCH_TIMER_VIRT_SPI); + frame->phys_irq = irq_of_parse_and_map(frame_node, + ARCH_TIMER_PHYS_SPI); - if (!arch_timer_needs_of_probing()) + if (++i >= ARCH_TIMER_MEM_MAX_FRAMES) + break; + } + timer_mem->num_frames = i; + + /* Try to determine the frequency from the device tree */ + if (!arch_timer_rate) + of_property_read_u32(np, "clock-frequency", &arch_timer_rate); + + ret = arch_timer_mem_init(timer_mem); + if (!ret && !arch_timer_needs_of_probing()) ret = arch_timer_common_init(); out: - iounmap(cntctlbase); - of_node_put(best_frame); + kfree(timer_mem); return ret; } CLOCKSOURCE_OF_DECLARE(armv7_arch_timer_mem, "arm,armv7-timer-mem", - arch_timer_mem_init); + arch_timer_mem_of_init); #ifdef CONFIG_ACPI static int __init map_generic_timer_interrupt(u32 interrupt, u32 flags) -- 2.9.3
next prev parent reply other threads:[~2016-12-21 6:45 UTC|newest] Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-12-21 6:45 [PATCH v19 00/15] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer fu.wei 2016-12-21 6:45 ` fu.wei at linaro.org 2016-12-21 6:45 ` [PATCH v19 01/15] clocksource/drivers/arm_arch_timer: Move enums and defines to header file fu.wei 2016-12-21 6:45 ` fu.wei at linaro.org 2016-12-21 6:45 ` [PATCH v19 02/15] clocksource/drivers/arm_arch_timer: Add a new enum for spi type fu.wei 2016-12-21 6:45 ` fu.wei at linaro.org 2016-12-21 6:45 ` [PATCH v19 04/15] clocksource/drivers/arm_arch_timer: rename some enums and defines fu.wei 2016-12-21 6:45 ` fu.wei at linaro.org 2016-12-21 6:45 ` [PATCH v19 05/15] clocksource/drivers/arm_arch_timer: rework PPI determination fu.wei 2016-12-21 6:45 ` fu.wei at linaro.org 2017-01-16 17:29 ` Mark Rutland 2017-01-16 17:29 ` Mark Rutland 2017-01-17 23:49 ` Fu Wei 2017-01-17 23:49 ` Fu Wei 2017-01-17 23:49 ` Fu Wei 2016-12-21 6:45 ` [PATCH v19 09/15] clocksource/drivers/arm_arch_timer: Introduce some new structs to prepare for GTDT fu.wei 2016-12-21 6:45 ` fu.wei at linaro.org 2016-12-21 6:45 ` fu.wei [this message] 2016-12-21 6:45 ` [PATCH v19 10/15] clocksource/drivers/arm_arch_timer: Refactor the timer init code " fu.wei at linaro.org [not found] ` <20161221064603.11830-11-fu.wei-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> 2017-01-16 18:30 ` Mark Rutland 2017-01-16 18:30 ` Mark Rutland 2017-01-16 18:30 ` Mark Rutland 2017-01-17 10:30 ` Fu Wei 2017-01-17 10:30 ` Fu Wei 2017-01-17 10:30 ` Fu Wei [not found] ` <CADyBb7tFaSshUmZsJbNO2tnbqAKEii39NQVfcx5CqDiDsK5OJA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2017-01-17 10:39 ` Fu Wei 2017-01-17 10:39 ` Fu Wei 2017-01-17 10:39 ` Fu Wei 2017-01-17 12:18 ` Timur Tabi 2017-01-17 12:18 ` Timur Tabi 2017-01-17 12:18 ` Timur Tabi 2017-01-17 12:29 ` Mark Rutland 2017-01-17 12:29 ` Mark Rutland 2017-01-17 12:29 ` Mark Rutland 2017-01-17 13:22 ` Fu Wei 2017-01-17 13:22 ` Fu Wei 2017-01-17 13:22 ` Fu Wei 2016-12-21 6:45 ` [PATCH v19 11/15] acpi/arm64: Add GTDT table parse driver fu.wei 2016-12-21 6:45 ` fu.wei at linaro.org 2016-12-21 6:46 ` [PATCH v19 12/15] clocksource/drivers/arm_arch_timer: Simplify ACPI support code fu.wei 2016-12-21 6:46 ` fu.wei at linaro.org 2016-12-21 6:46 ` [PATCH v19 13/15] acpi/arm64: Add memory-mapped timer support in GTDT driver fu.wei 2016-12-21 6:46 ` fu.wei at linaro.org 2016-12-21 6:46 ` fu.wei 2016-12-21 6:46 ` [PATCH v19 14/15] clocksource/drivers/arm_arch_timer: Add GTDT support for memory-mapped timer fu.wei 2016-12-21 6:46 ` fu.wei at linaro.org 2016-12-21 6:46 ` [PATCH v19 15/15] acpi/arm64: Add SBSA Generic Watchdog support in GTDT driver fu.wei 2016-12-21 6:46 ` fu.wei at linaro.org 2016-12-21 6:46 ` fu.wei [not found] ` <20161221064603.11830-1-fu.wei-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> 2016-12-21 6:45 ` [PATCH v19 03/15] clocksource/drivers/arm_arch_timer: Improve printk relevant code fu.wei-QSEj5FYQhm4dnm+yROfE0A 2016-12-21 6:45 ` fu.wei at linaro.org 2016-12-21 6:45 ` fu.wei 2016-12-21 6:45 ` [PATCH v19 06/15] clocksource/drivers/arm_arch_timer: Rework counter frequency detection fu.wei-QSEj5FYQhm4dnm+yROfE0A 2016-12-21 6:45 ` fu.wei at linaro.org 2016-12-21 6:45 ` fu.wei 2017-01-16 17:50 ` Mark Rutland 2017-01-16 17:50 ` Mark Rutland 2017-01-18 4:27 ` Fu Wei 2017-01-18 4:27 ` Fu Wei 2017-01-18 4:27 ` Fu Wei 2016-12-21 6:45 ` [PATCH v19 07/15] clocksource/drivers/arm_arch_timer: Refactor arch_timer_needs_probing fu.wei-QSEj5FYQhm4dnm+yROfE0A 2016-12-21 6:45 ` fu.wei at linaro.org 2016-12-21 6:45 ` fu.wei 2016-12-21 6:45 ` [PATCH v19 08/15] clocksource/drivers/arm_arch_timer: move arch_timer_needs_of_probing into DT init call fu.wei-QSEj5FYQhm4dnm+yROfE0A 2016-12-21 6:45 ` fu.wei at linaro.org 2016-12-21 6:45 ` fu.wei 2017-01-16 6:26 ` [PATCH v19 00/15] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer Fu Wei 2017-01-16 6:26 ` Fu Wei 2017-01-16 6:26 ` Fu Wei 2017-01-16 12:01 ` Mark Rutland 2017-01-16 12:01 ` Mark Rutland 2017-01-16 12:01 ` Mark Rutland 2017-01-16 12:04 ` Fu Wei 2017-01-16 12:04 ` Fu Wei 2017-01-16 12:04 ` Fu Wei 2017-01-16 17:00 ` Mark Rutland 2017-01-16 17:00 ` Mark Rutland 2017-01-16 17:00 ` Mark Rutland 2017-01-17 9:14 ` Fu Wei 2017-01-17 9:14 ` Fu Wei 2017-01-17 9:14 ` Fu Wei
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