From: Fu Wei fu.wei@linaro.org
The patch update arm_arch_timer driver to use the function provided by the new GTDT driver of ACPI. By this way, arm_arch_timer.c can be simplified, and separate all the ACPI GTDT knowledge from this timer driver.
Signed-off-by: Fu Wei fu.wei@linaro.org Signed-off-by: Hanjun Guo hanjun.guo@linaro.org Tested-by: Xiongfeng Wang wangxiongfeng2@huawei.com Reviewed-by: Hanjun Guo hanjun.guo@linaro.org Tested-by: Hanjun Guo hanjun.guo@linaro.org --- drivers/clocksource/arm_arch_timer.c | 54 ++++++++++++------------------------ 1 file changed, 17 insertions(+), 37 deletions(-)
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index 4aaebe7..415e30a 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -1149,63 +1149,36 @@ static int __init arch_timer_mem_of_init(struct device_node *np) CLOCKSOURCE_OF_DECLARE(armv7_arch_timer_mem, "arm,armv7-timer-mem", arch_timer_mem_of_init);
-#ifdef CONFIG_ACPI -static int __init map_generic_timer_interrupt(u32 interrupt, u32 flags) -{ - int trigger, polarity; - - if (!interrupt) - return 0; - - trigger = (flags & ACPI_GTDT_INTERRUPT_MODE) ? ACPI_EDGE_SENSITIVE - : ACPI_LEVEL_SENSITIVE; - - polarity = (flags & ACPI_GTDT_INTERRUPT_POLARITY) ? ACPI_ACTIVE_LOW - : ACPI_ACTIVE_HIGH; - - return acpi_register_gsi(NULL, interrupt, trigger, polarity); -} - +#ifdef CONFIG_ACPI_GTDT /* Initialize per-processor generic timer */ static int __init arch_timer_acpi_init(struct acpi_table_header *table) { int ret; - struct acpi_table_gtdt *gtdt;
if (arch_timers_present & ARCH_TIMER_TYPE_CP15) { pr_warn("already initialized, skipping\n"); return -EINVAL; }
- gtdt = container_of(table, struct acpi_table_gtdt, header); - arch_timers_present |= ARCH_TIMER_TYPE_CP15;
- arch_timer_ppi[ARCH_TIMER_PHYS_SECURE_PPI] = - map_generic_timer_interrupt(gtdt->secure_el1_interrupt, - gtdt->secure_el1_flags); + ret = acpi_gtdt_init(table, NULL); + if (ret) { + pr_err("Failed to init GTDT table.\n"); + return ret; + }
arch_timer_ppi[ARCH_TIMER_PHYS_NONSECURE_PPI] = - map_generic_timer_interrupt(gtdt->non_secure_el1_interrupt, - gtdt->non_secure_el1_flags); + acpi_gtdt_map_ppi(ARCH_TIMER_PHYS_NONSECURE_PPI);
arch_timer_ppi[ARCH_TIMER_VIRT_PPI] = - map_generic_timer_interrupt(gtdt->virtual_timer_interrupt, - gtdt->virtual_timer_flags); + acpi_gtdt_map_ppi(ARCH_TIMER_VIRT_PPI);
arch_timer_ppi[ARCH_TIMER_HYP_PPI] = - map_generic_timer_interrupt(gtdt->non_secure_el2_interrupt, - gtdt->non_secure_el2_flags); + acpi_gtdt_map_ppi(ARCH_TIMER_HYP_PPI);
arch_timer_kvm_info.virtual_irq = arch_timer_ppi[ARCH_TIMER_VIRT_PPI];
- /* Get the frequency from the sysreg CNTFRQ */ - arch_timer_rate = arch_timer_get_cntfrq(); - if (!arch_timer_rate) { - pr_err(FW_BUG "frequency not available.\n"); - return -EINVAL; - } - arch_timer_uses_ppi = arch_timer_select_ppi(); if (!arch_timer_ppi[arch_timer_uses_ppi]) { pr_err("No interrupt available, giving up\n"); @@ -1213,7 +1186,14 @@ static int __init arch_timer_acpi_init(struct acpi_table_header *table) }
/* Always-on capability */ - arch_timer_c3stop = !(gtdt->non_secure_el1_flags & ACPI_GTDT_ALWAYS_ON); + arch_timer_c3stop = acpi_gtdt_c3stop(arch_timer_uses_ppi); + + /* Get the frequency from the sysreg CNTFRQ */ + arch_timer_rate = arch_timer_get_cntfrq(); + if (!arch_timer_rate) { + pr_err(FW_BUG "frequency not available.\n"); + return -EINVAL; + }
ret = arch_timer_register(); if (ret)