zephyr: add bbram system call

This CL include the following:
1. Adds BBRAM system call.
2. BBRAM read/write data isn't really for characters. Change to use
uint8_t.

BUG=None.
BRANCH=None.
TEST=build & boot EC on volteer

Signed-off-by: Wealian Liao <whliao@nuvoton.corp-partner.google.com>
Change-Id: Iff92071e1808c4dacb24bf46e663898120369821
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2731177
Reviewed-by: Keith Short <keithshort@chromium.org>

1 files changed, 135 insertions, 18 deletions

diff --git a/zephyr/include/drivers/cros_bbram.h b/zephyr/include/drivers/cros_bbram.h
index 24dda79251..f96ef3dba4 100644
--- a/zephyr/include/drivers/cros_bbram.h
+++ b/zephyr/include/drivers/cros_bbram.h
@@ -14,7 +14,7 @@
  *
  * @return 0 if the Battery-Backed RAM data is valid.
  */
-typedef int (*cros_bbram_ibbr)(const struct device *dev);
+typedef int (*cros_bbram_api_ibbr)(const struct device *dev);
 
 /**
  * Reset the IBBR status (calling cros_bbram_ibbr will return 0 after this).
@@ -22,7 +22,7 @@ typedef int (*cros_bbram_ibbr)(const struct device *dev);
  * @return 0 after reset is complete.
  * @see cros_bbram_ibbr
  */
-typedef int (*cros_bbram_reset_ibbr)(const struct device *dev);
+typedef int (*cros_bbram_api_reset_ibbr)(const struct device *dev);
 
 /**
  * Check for V SBY power failure. This will return an error if the V SBY power
@@ -30,7 +30,7 @@ typedef int (*cros_bbram_reset_ibbr)(const struct device *dev);
  *
  * @return 0 if V SBY power domain is in normal operation.
  */
-typedef int (*cros_bbram_vsby)(const struct device *dev);
+typedef int (*cros_bbram_api_vsby)(const struct device *dev);
 
 /**
  * Reset the V SBY status (calling cros_bbram_vsby will return 0 after this).
@@ -38,7 +38,7 @@ typedef int (*cros_bbram_vsby)(const struct device *dev);
  * @return 0 after reset is complete.
  * @see cros_bbram_vsby
  */
-typedef int (*cros_bbram_reset_vsby)(const struct device *dev);
+typedef int (*cros_bbram_api_reset_vsby)(const struct device *dev);
 
 /**
  * Check for V CC1 power failure. This will return an error if the V CC1 power
@@ -46,7 +46,7 @@ typedef int (*cros_bbram_reset_vsby)(const struct device *dev);
  *
  * @return 0 if the V CC1 power domain is in normal operation.
  */
-typedef int (*cros_bbram_vcc1)(const struct device *dev);
+typedef int (*cros_bbram_api_vcc1)(const struct device *dev);
 
 /**
  * Reset the V CC1 status (calling cros_bbram_vcc1 will return 0 after this).
@@ -54,23 +54,140 @@ typedef int (*cros_bbram_vcc1)(const struct device *dev);
  * @return 0 after reset is complete.
  * @see cros_bbram_vcc1
  */
-typedef int (*cros_bbram_reset_vcc1)(const struct device *dev);
+typedef int (*cros_bbram_api_reset_vcc1)(const struct device *dev);
 
-typedef int (*cros_bbram_read)(const struct device *dev, int offset, int size,
-			       char *data);
+typedef int (*cros_bbram_api_read)(const struct device *dev, int offset,
+				   int size, uint8_t *data);
 
-typedef int (*cros_bbram_write)(const struct device *dev, int offset, int size,
-				char *data);
+typedef int (*cros_bbram_api_write)(const struct device *dev, int offset,
+				    int size, uint8_t *data);
 
 __subsystem struct cros_bbram_driver_api {
-	cros_bbram_ibbr ibbr;
-	cros_bbram_reset_ibbr reset_ibbr;
-	cros_bbram_vsby vsby;
-	cros_bbram_reset_vsby reset_vsby;
-	cros_bbram_vcc1 vcc1;
-	cros_bbram_reset_vcc1 reset_vcc1;
-	cros_bbram_read read;
-	cros_bbram_write write;
+	cros_bbram_api_ibbr ibbr;
+	cros_bbram_api_reset_ibbr reset_ibbr;
+	cros_bbram_api_vsby vsby;
+	cros_bbram_api_reset_vsby reset_vsby;
+	cros_bbram_api_vcc1 vcc1;
+	cros_bbram_api_reset_vcc1 reset_vcc1;
+	cros_bbram_api_read read;
+	cros_bbram_api_write write;
 };
 
+__syscall int cros_bbram_get_ibbr(const struct device *dev);
+
+static inline int z_impl_cros_bbram_get_ibbr(const struct device *dev)
+{
+	const struct cros_bbram_driver_api *api =
+		(const struct cros_bbram_driver_api *)dev->api;
+
+	if (!api->ibbr) {
+		return -ENOTSUP;
+	}
+
+	return api->ibbr(dev);
+}
+
+__syscall int cros_bbram_reset_ibbr(const struct device *dev);
+
+static inline int z_impl_cros_bbram_reset_ibbr(const struct device *dev)
+{
+	const struct cros_bbram_driver_api *api =
+		(const struct cros_bbram_driver_api *)dev->api;
+
+	if (!api->reset_ibbr) {
+		return -ENOTSUP;
+	}
+
+	return api->reset_ibbr(dev);
+}
+
+__syscall int cros_bbram_get_vsby(const struct device *dev);
+
+static inline int z_impl_cros_bbram_get_vsby(const struct device *dev)
+{
+	const struct cros_bbram_driver_api *api =
+		(const struct cros_bbram_driver_api *)dev->api;
+
+	if (!api->vsby) {
+		return -ENOTSUP;
+	}
+
+	return api->vsby(dev);
+}
+
+__syscall int cros_bbram_reset_vsby(const struct device *dev);
+
+static inline int z_impl_cros_bbram_reset_vsby(const struct device *dev)
+{
+	const struct cros_bbram_driver_api *api =
+		(const struct cros_bbram_driver_api *)dev->api;
+
+	if (!api->reset_vsby) {
+		return -ENOTSUP;
+	}
+
+	return api->reset_vsby(dev);
+}
+
+__syscall int cros_bbram_get_vcc1(const struct device *dev);
+
+static inline int z_impl_cros_bbram_get_vcc1(const struct device *dev)
+{
+	const struct cros_bbram_driver_api *api =
+		(const struct cros_bbram_driver_api *)dev->api;
+
+	if (!api->vcc1) {
+		return -ENOTSUP;
+	}
+
+	return api->vcc1(dev);
+}
+
+__syscall int cros_bbram_reset_vcc1(const struct device *dev);
+
+static inline int z_impl_cros_bbram_reset_vcc1(const struct device *dev)
+{
+	const struct cros_bbram_driver_api *api =
+		(const struct cros_bbram_driver_api *)dev->api;
+
+	if (!api->reset_vcc1) {
+		return -ENOTSUP;
+	}
+
+	return api->reset_vcc1(dev);
+}
+
+__syscall int cros_bbram_read(const struct device *dev, int offset, int size,
+			      uint8_t *data);
+
+static inline int z_impl_cros_bbram_read(const struct device *dev, int offset,
+					 int size, uint8_t *data)
+{
+	const struct cros_bbram_driver_api *api =
+		(const struct cros_bbram_driver_api *)dev->api;
+
+	if (!api->read) {
+		return -ENOTSUP;
+	}
+
+	return api->read(dev, offset, size, data);
+}
+
+__syscall int cros_bbram_write(const struct device *dev, int offset, int size,
+			       uint8_t *data);
+
+static inline int z_impl_cros_bbram_write(const struct device *dev, int offset,
+					  int size, uint8_t *data)
+{
+	const struct cros_bbram_driver_api *api =
+		(const struct cros_bbram_driver_api *)dev->api;
+
+	if (!api->write) {
+		return -ENOTSUP;
+	}
+
+	return api->write(dev, offset, size, data);
+}
+
+#include <syscalls/cros_bbram.h>
 #endif /* ZEPHYR_INCLUDE_DRIVERS_CROS_BBRAM_H_ */