diff options
| -rw-r--r-- | drivers/platform/chrome/cros_ec_lpc.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c index fa6606da802a..5d9cc8df208b 100644 --- a/drivers/platform/chrome/cros_ec_lpc.c +++ b/drivers/platform/chrome/cros_ec_lpc.c @@ -44,6 +44,11 @@ static bool cros_ec_lpc_acpi_device_found; * the ACPI device. */ #define CROS_EC_LPC_QUIRK_ACPI_ID BIT(1) +/* + * Indicates that lpc_driver_data.quirk_aml_mutex_name should be used + * to find an AML mutex to protect access to Microchip EC. + */ +#define CROS_EC_LPC_QUIRK_AML_MUTEX BIT(2) /** * struct lpc_driver_data - driver data attached to a DMI device ID to indicate @@ -52,11 +57,14 @@ static bool cros_ec_lpc_acpi_device_found; * @quirk_mmio_memory_base: The first I/O port addressing EC mapped memory (used * when quirk ...REMAP_MEMORY is set.) * @quirk_acpi_id: An ACPI HID to be used to find the ACPI device. + * @quirk_aml_mutex_name: The name of an AML mutex to be used to protect access + * to Microchip EC. */ struct lpc_driver_data { u32 quirks; u16 quirk_mmio_memory_base; const char *quirk_acpi_id; + const char *quirk_aml_mutex_name; }; /** @@ -482,6 +490,17 @@ static int cros_ec_lpc_probe(struct platform_device *pdev) } ACPI_COMPANION_SET(dev, adev); } + + if (quirks & CROS_EC_LPC_QUIRK_AML_MUTEX) { + const char *name + = driver_data->quirk_aml_mutex_name; + ret = cros_ec_lpc_mec_acpi_mutex(ACPI_COMPANION(dev), name); + if (ret) { + dev_err(dev, "failed to get AML mutex '%s'", name); + return ret; + } + dev_info(dev, "got AML mutex '%s'", name); + } } /* |