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platform/chrome: cros_ec_typec: Use notifier for updates

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Register a listener for the cros-usbpd-notifier, and update port state
when a notification comes in.

Signed-off-by: Prashant Malani <pmalani@chromium.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
This commit is contained in:
Prashant Malani 2020-04-14 22:29:41 -07:00 committed by Enric Balletbo i Serra
parent cf96e284de
commit 7110f5f0e5
2 changed files with 24 additions and 0 deletions
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1
drivers/platform/chrome/Kconfig
View File

@ -217,6 +217,7 @@ config CROS_EC_SYSFS
config CROS_EC_TYPEC
tristate "ChromeOS EC Type-C Connector Control"
depends on MFD_CROS_EC_DEV && TYPEC
depends on CROS_USBPD_NOTIFY
default MFD_CROS_EC_DEV
help
If you say Y here, you get support for accessing Type C connector

23
drivers/platform/chrome/cros_ec_typec.c
View File

@ -11,6 +11,7 @@
#include <linux/of.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_data/cros_usbpd_notify.h>
#include <linux/platform_device.h>
#include <linux/usb/typec.h>
@ -26,6 +27,7 @@ struct cros_typec_data {
struct typec_port *ports[EC_USB_PD_MAX_PORTS];
/* Initial capabilities for each port. */
struct typec_capability *caps[EC_USB_PD_MAX_PORTS];
struct notifier_block nb;
};
static int cros_typec_parse_port_props(struct typec_capability *cap,
@ -272,6 +274,22 @@ static int cros_typec_get_cmd_version(struct cros_typec_data *typec)
return 0;
}
static int cros_ec_typec_event(struct notifier_block *nb,
unsigned long host_event, void *_notify)
{
struct cros_typec_data *typec = container_of(nb, struct cros_typec_data,
nb);
int ret, i;
for (i = 0; i < typec->num_ports; i++) {
ret = cros_typec_port_update(typec, i);
if (ret < 0)
dev_warn(typec->dev, "Update failed for port: %d\n", i);
}
return NOTIFY_OK;
}
#ifdef CONFIG_ACPI
static const struct acpi_device_id cros_typec_acpi_id[] = {
{ "GOOG0014", 0 },
@ -332,6 +350,11 @@ static int cros_typec_probe(struct platform_device *pdev)
goto unregister_ports;
}
typec->nb.notifier_call = cros_ec_typec_event;
ret = cros_usbpd_register_notify(&typec->nb);
if (ret < 0)
goto unregister_ports;
return 0;
unregister_ports: