clocksource: arm_arch_timer: simplify ACPI support code.

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>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>

1 files changed, 10 insertions, 30 deletions

diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index d87c4035a505..e398228d60b2 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -1385,53 +1385,33 @@ out:
 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];
 
@@ -1452,7 +1432,7 @@ 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);
 
         /* Check for globally applicable workarounds */
         arch_timer_check_ool_workaround(ate_match_acpi_oem_info, table);