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path: root/drivers/acpi/acpica/hwgpe.c
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Diffstat (limited to 'drivers/acpi/acpica/hwgpe.c')
-rw-r--r--drivers/acpi/acpica/hwgpe.c52
1 files changed, 40 insertions, 12 deletions
diff --git a/drivers/acpi/acpica/hwgpe.c b/drivers/acpi/acpica/hwgpe.c
index bd72319a38f0..d989b8e786cc 100644
--- a/drivers/acpi/acpica/hwgpe.c
+++ b/drivers/acpi/acpica/hwgpe.c
@@ -57,6 +57,27 @@ acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
/******************************************************************************
*
+ * FUNCTION: acpi_hw_gpe_register_bit
+ *
+ * PARAMETERS: gpe_event_info - Info block for the GPE
+ * gpe_register_info - Info block for the GPE register
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Compute GPE enable mask with one bit corresponding to the given
+ * GPE set.
+ *
+ ******************************************************************************/
+
+u32 acpi_hw_gpe_register_bit(struct acpi_gpe_event_info *gpe_event_info,
+ struct acpi_gpe_register_info *gpe_register_info)
+{
+ return (u32)1 << (gpe_event_info->gpe_number -
+ gpe_register_info->base_gpe_number);
+}
+
+/******************************************************************************
+ *
* FUNCTION: acpi_hw_low_disable_gpe
*
* PARAMETERS: gpe_event_info - Info block for the GPE to be disabled
@@ -72,6 +93,7 @@ acpi_status acpi_hw_low_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
struct acpi_gpe_register_info *gpe_register_info;
acpi_status status;
u32 enable_mask;
+ u32 register_bit;
/* Get the info block for the entire GPE register */
@@ -89,9 +111,9 @@ acpi_status acpi_hw_low_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
/* Clear just the bit that corresponds to this GPE */
- ACPI_CLEAR_BIT(enable_mask, ((u32)1 <<
- (gpe_event_info->gpe_number -
- gpe_register_info->base_gpe_number)));
+ register_bit = acpi_hw_gpe_register_bit(gpe_event_info,
+ gpe_register_info);
+ ACPI_CLEAR_BIT(enable_mask, register_bit);
/* Write the updated enable mask */
@@ -150,21 +172,28 @@ acpi_hw_write_gpe_enable_reg(struct acpi_gpe_event_info * gpe_event_info)
acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info * gpe_event_info)
{
+ struct acpi_gpe_register_info *gpe_register_info;
acpi_status status;
- u8 register_bit;
+ u32 register_bit;
ACPI_FUNCTION_ENTRY();
- register_bit = (u8)(1 <<
- (gpe_event_info->gpe_number -
- gpe_event_info->register_info->base_gpe_number));
+ /* Get the info block for the entire GPE register */
+
+ gpe_register_info = gpe_event_info->register_info;
+ if (!gpe_register_info) {
+ return (AE_NOT_EXIST);
+ }
+
+ register_bit = acpi_hw_gpe_register_bit(gpe_event_info,
+ gpe_register_info);
/*
* Write a one to the appropriate bit in the status register to
* clear this GPE.
*/
status = acpi_hw_write(register_bit,
- &gpe_event_info->register_info->status_address);
+ &gpe_register_info->status_address);
return (status);
}
@@ -187,7 +216,7 @@ acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info,
acpi_event_status * event_status)
{
u32 in_byte;
- u8 register_bit;
+ u32 register_bit;
struct acpi_gpe_register_info *gpe_register_info;
acpi_status status;
acpi_event_status local_event_status = 0;
@@ -204,9 +233,8 @@ acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info,
/* Get the register bitmask for this GPE */
- register_bit = (u8)(1 <<
- (gpe_event_info->gpe_number -
- gpe_event_info->register_info->base_gpe_number));
+ register_bit = acpi_hw_gpe_register_bit(gpe_event_info,
+ gpe_register_info);
/* GPE currently enabled? (enabled for runtime?) */