zephyr: Add chip info API in cros_system driver

Add the following chip_info API in cros_system driver for getting the
chip information:
1. cros_system_chip_vendor()
2. cros_system_chip_name()
3. cros_system_chip_revision()

BUG=none
BRANCH=none
TEST=build & boot ec on volteer

Signed-off-by: Mulin Chao <mlchao@nuvoton.com>
Signed-off-by: Wealian Liao <whliao@nuvoton.corp-partner.google.com>
Change-Id: I06718ff26f9cbee26cc9dbdcbbd02a0cc901d397
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2807477
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Keith Short <keithshort@chromium.org>
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Commit-Queue: Jack Rosenthal <jrosenth@chromium.org>

1 files changed, 89 insertions, 0 deletions

diff --git a/zephyr/include/drivers/cros_system.h b/zephyr/include/drivers/cros_system.h
index 9010be2829..fcd3ef3b6a 100644
--- a/zephyr/include/drivers/cros_system.h
+++ b/zephyr/include/drivers/cros_system.h
@@ -61,11 +61,35 @@ typedef int (*cros_system_hibernate_api)(const struct device *dev,
 					 uint32_t seconds,
 					 uint32_t microseconds);
 
+/**
+ * @typedef cros_system_chip_vendor_api
+ * @brief Callback API for getting the chip vendor.
+ * See cros_system_chip_vendor() for argument descriptions
+ */
+typedef const char *(*cros_system_chip_vendor_api)(const struct device *dev);
+
+/**
+ * @typedef cros_system_chip_name_api
+ * @brief Callback API for getting the chip name.
+ * See cros_system_chip_name() for argument descriptions
+ */
+typedef const char *(*cros_system_chip_name_api)(const struct device *dev);
+
+/**
+ * @typedef cros_system_chip_revision_api
+ * @brief Callback API for getting the chip revision.
+ * See cros_system_chip_revision() for argument descriptions
+ */
+typedef const char *(*cros_system_chip_revision_api)(const struct device *dev);
+
 /** @brief Driver API structure. */
 __subsystem struct cros_system_driver_api {
 	cros_system_get_reset_cause_api get_reset_cause;
 	cros_system_soc_reset_api soc_reset;
 	cros_system_hibernate_api hibernate;
+	cros_system_chip_vendor_api chip_vendor;
+	cros_system_chip_name_api chip_name;
+	cros_system_chip_revision_api chip_revision;
 };
 
 /**
@@ -140,6 +164,71 @@ static inline int z_impl_cros_system_hibernate(const struct device *dev,
 }
 
 /**
+ * @brief Get the chip vendor.
+ *
+ * @param dev Pointer to the device structure for the driver instance.
+ * @retval Chip vendor string if successful.
+ * @retval Null string if failure.
+ */
+__syscall const char *cros_system_chip_vendor(const struct device *dev);
+
+static inline const char *
+z_impl_cros_system_chip_vendor(const struct device *dev)
+{
+	const struct cros_system_driver_api *api =
+		(const struct cros_system_driver_api *)dev->api;
+
+	if (!api->chip_vendor) {
+		return "";
+	}
+
+	return api->chip_vendor(dev);
+}
+
+/**
+ * @brief Get the chip name.
+ *
+ * @param dev Pointer to the device structure for the driver instance.
+ * @retval Chip name string if successful.
+ * @retval Null string if failure.
+ */
+__syscall const char *cros_system_chip_name(const struct device *dev);
+
+static inline const char *z_impl_cros_system_chip_name(const struct device *dev)
+{
+	const struct cros_system_driver_api *api =
+		(const struct cros_system_driver_api *)dev->api;
+
+	if (!api->chip_name) {
+		return "";
+	}
+
+	return api->chip_name(dev);
+}
+
+/**
+ * @brief Get the chip revision.
+ *
+ * @param dev Pointer to the device structure for the driver instance.
+ * @retval Chip revision string if successful.
+ * @retval Null string if failure.
+ */
+__syscall const char *cros_system_chip_revision(const struct device *dev);
+
+static inline const char *
+z_impl_cros_system_chip_revision(const struct device *dev)
+{
+	const struct cros_system_driver_api *api =
+		(const struct cros_system_driver_api *)dev->api;
+
+	if (!api->chip_revision) {
+		return "";
+	}
+
+	return api->chip_revision(dev);
+}
+
+/**
  * @}
  */
 #include <syscalls/cros_system.h>