diff options
| author | Gwendal Grignou | 2017-05-16 17:46:48 +0200 |
|---|---|---|
| committer | Benson Leung | 2017-06-23 16:12:15 -0700 |
| commit | 12278dc7c572e87727715ecce9cda15b70efeca5 (patch) | |
| tree | 4869ec9101787c4783755ab917f2cecee548c42a | |
| parent | 8d4a3dc423a2695be51ac864eefb8ba7688b1240 (diff) | |
platform/chrome: cros_ec_lpc: Add support for GOOG004 ACPI device
This patch removes platform_device_register() call and adds an ACPI
device id structure. The driver is now automatically probed for devices
with a GOOG0004 ACPI entry.
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Signed-off-by: Benson Leung <bleung@chromium.org>
| -rw-r--r-- | drivers/platform/chrome/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_lpc.c | 23 |
2 files changed, 10 insertions, 15 deletions
diff --git a/drivers/platform/chrome/Kconfig b/drivers/platform/chrome/Kconfig index 6d80fb5076b6..0ad6e290bbda 100644 --- a/drivers/platform/chrome/Kconfig +++ b/drivers/platform/chrome/Kconfig @@ -49,7 +49,7 @@ config CROS_EC_CHARDEV config CROS_EC_LPC tristate "ChromeOS Embedded Controller (LPC)" - depends on MFD_CROS_EC && (X86 || COMPILE_TEST) + depends on MFD_CROS_EC && ACPI && (X86 || COMPILE_TEST) help If you say Y here, you get support for talking to the ChromeOS EC over an LPC bus. This uses a simple byte-level protocol with a diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c index bc2dc6210d7b..9070352168a6 100644 --- a/drivers/platform/chrome/cros_ec_lpc.c +++ b/drivers/platform/chrome/cros_ec_lpc.c @@ -21,6 +21,7 @@ * expensive. */ +#include <linux/acpi.h> #include <linux/dmi.h> #include <linux/delay.h> #include <linux/io.h> @@ -32,6 +33,7 @@ #include <linux/printk.h> #define DRV_NAME "cros_ec_lpcs" +#define ACPI_DRV_NAME "GOOG0004" static int ec_response_timed_out(void) { @@ -288,6 +290,12 @@ static int cros_ec_lpc_remove(struct platform_device *pdev) return 0; } +static const struct acpi_device_id cros_ec_lpc_acpi_device_ids[] = { + { ACPI_DRV_NAME, 0 }, + { } +}; +MODULE_DEVICE_TABLE(acpi, cros_ec_lpc_acpi_device_ids); + static struct dmi_system_id cros_ec_lpc_dmi_table[] __initdata = { { /* @@ -328,15 +336,12 @@ MODULE_DEVICE_TABLE(dmi, cros_ec_lpc_dmi_table); static struct platform_driver cros_ec_lpc_driver = { .driver = { .name = DRV_NAME, + .acpi_match_table = cros_ec_lpc_acpi_device_ids, }, .probe = cros_ec_lpc_probe, .remove = cros_ec_lpc_remove, }; -static struct platform_device cros_ec_lpc_device = { - .name = DRV_NAME -}; - static int __init cros_ec_lpc_init(void) { int ret; @@ -356,21 +361,11 @@ static int __init cros_ec_lpc_init(void) return ret; } - /* Register the device, and it'll get hooked up automatically */ - ret = platform_device_register(&cros_ec_lpc_device); - if (ret) { - pr_err(DRV_NAME ": can't register device: %d\n", ret); - platform_driver_unregister(&cros_ec_lpc_driver); - cros_ec_lpc_reg_destroy(); - return ret; - } - return 0; } static void __exit cros_ec_lpc_exit(void) { - platform_device_unregister(&cros_ec_lpc_device); platform_driver_unregister(&cros_ec_lpc_driver); cros_ec_lpc_reg_destroy(); } |