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ec/google/chromeec: Add new *-switch properties to USBC.CONx devices 

The Linux ChromeOS EC driver now looks for 3 new properties under each
USBC.CONx device contained within the ChromeOS EC device. These
properties are just a reference to the device that controls the
switches for USB 2/3 muxing, SBU lines, and CC lines. It uses the new
function, soc_get_pmc_mux_device() to retrieve the device.

Change-Id: I03cd83f9b2901b5583053fac8ab6eab64717a07d
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40618
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Tim Wawrzynczak 2020-05-18 13:45:43 -06:00 committed by Duncan Laurie
parent c7854b064f
commit 6046739b9d
1 changed files with 33 additions and 0 deletions
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33
src/ec/google/chromeec/ec_acpi.c
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@ -19,6 +19,14 @@
#define GOOGLE_CHROMEEC_USBC_DEVICE_HID "GOOG0014"
#define GOOGLE_CHROMEEC_USBC_DEVICE_NAME "USBC"
/* Avoid adding a false dependency on an SoC or intel/common */
extern const struct device *soc_get_pmc_mux_device(int port_number);
__weak const struct device *soc_get_pmc_mux_device(int port_number)
{
return NULL;
}
const char *google_chromeec_acpi_name(const struct device *dev)
{
/*
@ -186,6 +194,30 @@ static void add_usb_port_references(struct acpi_dp *dsd, int port_number)
}
}
/*
* Another helper for fill_ssdt_typec_device(). For each port, this one adds references to the
* ACPI device which control the orientation, USB data role and data muxing.
*/
static void add_switch_references(struct acpi_dp *dsd, int port_number)
{
const struct device *dev;
const char *path;
dev = soc_get_pmc_mux_device(port_number);
if (!dev) {
printk(BIOS_ERR, "ERROR: %s: No SOC PMC MUX device found", __func__);
return;
}
path = acpi_device_path(dev);
if (!path)
return;
acpi_dp_add_reference(dsd, "orientation-switch", path);
acpi_dp_add_reference(dsd, "usb-role-switch", path);
acpi_dp_add_reference(dsd, "mode-switch", path);
}
static void fill_ssdt_typec_device(const struct device *dev)
{
struct usb_pd_port_caps port_caps;
@ -218,6 +250,7 @@ static void fill_ssdt_typec_device(const struct device *dev)
acpi_dp_add_integer(dsd, "port-number", i);
add_port_caps(dsd, &port_caps);
add_usb_port_references(dsd, i);
add_switch_references(dsd, i);
acpi_dp_write(dsd);
acpigen_pop_len(); /* Device CONx */