From: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
Introduce a general quirk framework for each timer erratum in ACPI,
which use the oem information in GTDT table for platform specific erratums.
The struct gtdt_arch_timer_fixup is introduced to record the oem
information to match the quirk and handle the erratum.
v3: Introduce a generic aquick framework for erratum in ACPI mode.
v4: rename the quirk handler parameter to make it more generic, and
avoid break loop when handling the quirk becasue it need to
support multi quirks handler.
Signed-off-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
Signed-off-by: Ding Tianhong <dingtianhong@xxxxxxxxxx>
---
drivers/clocksource/arm_arch_timer.c | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 3d59af1..d4f4a0d 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -1068,6 +1068,39 @@ CLOCKSOURCE_OF_DECLARE(armv7_arch_timer_mem, "arm,armv7-timer-mem",
arch_timer_mem_init);
#ifdef CONFIG_ACPI
+struct gtdt_arch_timer_fixup {
+ char oem_id[ACPI_OEM_ID_SIZE];
+ char oem_table_id[ACPI_OEM_TABLE_ID_SIZE];
+ u32 oem_revision;
+
+ /* quirk handler for arch timer erratum */
+ void (*handler)(void *context);
+ void *context;
+};
+
+/* note: this needs to be updated according to the doc of OEM ID
+ * and TABLE ID for different board.
+ */
+struct gtdt_arch_timer_fixup arch_timer_quirks[] __initdata = {
+};
+
+void __init arch_timer_acpi_quirks_handler(char *oem_id,
+ char *oem_table_id,
+ u32 oem_revision)
+{
+ struct gtdt_arch_timer_fixup *quirks = arch_timer_quirks;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(arch_timer_quirks); i++, quirks++) {
+ if (!memcmp(quirks->oem_id, oem_id, ACPI_OEM_ID_SIZE) &&
+ !memcmp(quirks->oem_table_id, oem_table_id, ACPI_OEM_TABLE_ID_SIZE) &&
+ quirks->oem_revision == oem_revision) {
+ if (quirks->handler && quirks->context)
+ quirks->handler(quirks->context);
+ }
+ }
+}
+
static int __init map_generic_timer_interrupt(u32 interrupt, u32 flags)
{
int trigger, polarity;
@@ -1094,6 +1127,9 @@ static int __init arch_timer_acpi_init(struct acpi_table_header *table)
return -EINVAL;
}
+ arch_timer_acpi_quirks_handler(table->oem_id, table->oem_table_id,
+ table->oem_revision);
+
gtdt = container_of(table, struct acpi_table_gtdt, header);
arch_timers_present |= ARCH_CP15_TIMER;
--
1.9.0
--
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