diff options
| author | Duncan Laurie <dlaurie@google.com> | 2017-08-29 08:28:58 -0700 |
|---|---|---|
| committer | Duncan Laurie <dlaurie@chromium.org> | 2017-08-30 15:36:54 +0000 |
| commit | 1533a3cae8cdeeef8ed397c4965e7deca3c73adc (patch) | |
| tree | 4e88248c84cc22ffc86930b9f234b5f0d4fbfbcd /src/drivers/i2c | |
| parent | b3023b697adb3d7049a6d9ed98a313c356739d91 (diff) | |
drivers/i2c/generic: Support additional device properties
Add support for providing additional free form device properties via
devicetree in order to make this driver suitable for kernel drivers
that need additional board-specific device properties.
This currently allows adding up to 10 additional properties to a device.
BUG=b:63413023
TEST=manual testing to ensure that newly added properties are in SSDT
Change-Id: I2b8ceb208f4aba01053746547def6d07c8f8f3a2
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/21270
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/drivers/i2c')
| -rw-r--r-- | src/drivers/i2c/generic/chip.h | 6 | ||||
| -rw-r--r-- | src/drivers/i2c/generic/generic.c | 6 |
2 files changed, 11 insertions, 1 deletions
diff --git a/src/drivers/i2c/generic/chip.h b/src/drivers/i2c/generic/chip.h index c5d458b6ee..8b285f054c 100644 --- a/src/drivers/i2c/generic/chip.h +++ b/src/drivers/i2c/generic/chip.h @@ -19,6 +19,8 @@ #include <arch/acpi_device.h> #include <device/i2c_simple.h> +#define MAX_GENERIC_PROPERTY_LIST 10 + struct drivers_i2c_generic_config { const char *hid; /* ACPI _HID (required) */ const char *cid; /* ACPI _CID */ @@ -59,6 +61,10 @@ struct drivers_i2c_generic_config { struct acpi_gpio enable_gpio; /* Delay to be inserted after device is enabled. */ unsigned enable_delay_ms; + + /* Generic properties for exporting device-specific data to the OS */ + struct acpi_dp property_list[MAX_GENERIC_PROPERTY_LIST]; + int property_count; }; /* diff --git a/src/drivers/i2c/generic/generic.c b/src/drivers/i2c/generic/generic.c index b7a535e47f..fa27b0e9fd 100644 --- a/src/drivers/i2c/generic/generic.c +++ b/src/drivers/i2c/generic/generic.c @@ -116,7 +116,8 @@ void i2c_generic_fill_ssdt(struct device *dev, } /* DSD */ - if (config->probed || (reset_gpio_index != -1) || + if (config->probed || config->property_count || + (reset_gpio_index != -1) || (enable_gpio_index != -1) || (irq_gpio_index != -1)) { dsd = acpi_dp_new_table("_DSD"); if (config->probed) @@ -134,6 +135,9 @@ void i2c_generic_fill_ssdt(struct device *dev, acpi_dp_add_gpio(dsd, "enable-gpios", path, enable_gpio_index, 0, config->enable_gpio.polarity); + /* Add generic property list */ + acpi_dp_add_property_list(dsd, config->property_list, + config->property_count); acpi_dp_write(dsd); } |