[PATCH v24 07/11] clocksource: arm_arch_timer: simplify ACPI support code.

fu.wei
2017-04-14T18:42:27Z

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>
---
drivers/clocksource/arm_arch_timer.c | 40 +++++++++---------------------------
1 file changed, 10 insertions(+), 30 deletions(-)

diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index dad0264..05f2f7a 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -1384,53 +1384,33 @@ 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];

@@ -1451,7 +1431,7 @@ 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);
--
2.9.3