diff options
Diffstat (limited to 'drivers/platform/chrome/chromeos_pstore.c')
| -rw-r--r-- | drivers/platform/chrome/chromeos_pstore.c | 55 |
1 files changed, 53 insertions, 2 deletions
diff --git a/drivers/platform/chrome/chromeos_pstore.c b/drivers/platform/chrome/chromeos_pstore.c index 34749200e4ab..308a853ac4f1 100644 --- a/drivers/platform/chrome/chromeos_pstore.c +++ b/drivers/platform/chrome/chromeos_pstore.c @@ -8,6 +8,7 @@ * the Free Software Foundation, version 2 of the License. */ +#include <linux/acpi.h> #include <linux/dmi.h> #include <linux/module.h> #include <linux/platform_device.h> @@ -58,7 +59,7 @@ MODULE_DEVICE_TABLE(dmi, chromeos_pstore_dmi_table); static struct ramoops_platform_data chromeos_ramoops_data = { .mem_size = 0x100000, .mem_address = 0xf00000, - .record_size = 0x20000, + .record_size = 0x40000, .console_size = 0x20000, .ftrace_size = 0x20000, .dump_oops = 1, @@ -71,9 +72,59 @@ static struct platform_device chromeos_ramoops = { }, }; +#ifdef CONFIG_ACPI +static const struct acpi_device_id cros_ramoops_acpi_match[] = { + { "GOOG9999", 0 }, + { } +}; +MODULE_DEVICE_TABLE(acpi, cros_ramoops_acpi_match); + +static struct platform_driver chromeos_ramoops_acpi = { + .driver = { + .name = "chromeos_pstore", + .acpi_match_table = ACPI_PTR(cros_ramoops_acpi_match), + }, +}; + +static int __init chromeos_probe_acpi(struct platform_device *pdev) +{ + struct resource *res; + resource_size_t len; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENOMEM; + + len = resource_size(res); + if (!res->start || !len) + return -ENOMEM; + + pr_info("chromeos ramoops using acpi device.\n"); + + chromeos_ramoops_data.mem_size = len; + chromeos_ramoops_data.mem_address = res->start; + + return 0; +} + +static bool __init chromeos_check_acpi(void) +{ + if (!platform_driver_probe(&chromeos_ramoops_acpi, chromeos_probe_acpi)) + return true; + return false; +} +#else +static inline bool chromeos_check_acpi(void) { return false; } +#endif + static int __init chromeos_pstore_init(void) { - if (dmi_check_system(chromeos_pstore_dmi_table)) + bool acpi_dev_found; + + /* First check ACPI for non-hardcoded values from firmware. */ + acpi_dev_found = chromeos_check_acpi(); + + if (acpi_dev_found || dmi_check_system(chromeos_pstore_dmi_table)) return platform_device_register(&chromeos_ramoops); return -ENODEV; |