zephyr: Move BBRAM access functions to common system.c

NPCX & IT8xxx2 series are both use BBRAM for scratchpad/reset_flags
access. cros_bbram API already handles the chip-specific code. This CL
moves scratchpad/reset_flags access functions to the common system.c to
avoid duplicate those functions.

BUG=none
BRANCH=none
TEST=zmake testall
TEST=check reset cause on lazor & npcx_evb

Signed-off-by: Wealian Liao <whliao@nuvoton.corp-partner.google.com>
Change-Id: I0a394e5fbf784ec2e3caea77f194c88ae9d5542e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3067156
Reviewed-by: Yuval Peress <peress@chromium.org>
Commit-Queue: Yuval Peress <peress@chromium.org>

1 files changed, 0 insertions, 79 deletions

diff --git a/zephyr/shim/chip/it8xxx2/system.c b/zephyr/shim/chip/it8xxx2/system.c
index e40c49d137..d9dcd7ccfb 100644
--- a/zephyr/shim/chip/it8xxx2/system.c
+++ b/zephyr/shim/chip/it8xxx2/system.c
@@ -3,87 +3,8 @@
  * found in the LICENSE file.
  */
 
-#include <drivers/cros_bbram.h>
-#include <logging/log.h>
-
 #include "system.h"
 
-#define GET_BBRAM_OFFSET(node) \
-	DT_PROP(DT_PATH(named_bbram_regions, node), offset)
-#define GET_BBRAM_SIZE(node) DT_PROP(DT_PATH(named_bbram_regions, node), size)
-
-LOG_MODULE_REGISTER(shim_ite_system, LOG_LEVEL_ERR);
-
-const struct device *bbram_dev;
-
-void chip_save_reset_flags(uint32_t flags)
-{
-	if (bbram_dev == NULL) {
-		LOG_ERR("bbram_dev doesn't have a binding");
-		return;
-	}
-
-	cros_bbram_write(bbram_dev, GET_BBRAM_OFFSET(saved_reset_flags),
-			 GET_BBRAM_SIZE(saved_reset_flags), (uint8_t *)&flags);
-}
-
-uint32_t chip_read_reset_flags(void)
-{
-	uint32_t flags = 0;
-
-	if (bbram_dev == NULL) {
-		LOG_ERR("bbram_dev doesn't have a binding");
-		return 0;
-	}
-
-	cros_bbram_read(bbram_dev, GET_BBRAM_OFFSET(saved_reset_flags),
-			GET_BBRAM_SIZE(saved_reset_flags), (uint8_t *)&flags);
-
-	return flags;
-}
-
-int system_set_scratchpad(uint32_t value)
-{
-	if (bbram_dev == NULL) {
-		LOG_ERR("bbram_dev doesn't have a binding");
-		return 0;
-	}
-
-	cros_bbram_write(bbram_dev, GET_BBRAM_OFFSET(scratchpad),
-			 GET_BBRAM_SIZE(scratchpad), (uint8_t *)&value);
-
-	return EC_SUCCESS;
-}
-
-uint32_t system_get_scratchpad(void)
-{
-	uint32_t value = 0;
-
-	if (bbram_dev == NULL) {
-		LOG_ERR("bbram_dev doesn't have a binding");
-		return 0;
-	}
-
-	cros_bbram_read(bbram_dev, GET_BBRAM_OFFSET(scratchpad),
-			GET_BBRAM_SIZE(scratchpad), (uint8_t *)&value);
-
-	return value;
-}
-
-static int chip_system_init(const struct device *unused)
-{
-	ARG_UNUSED(unused);
-
-	bbram_dev = DEVICE_DT_GET(DT_NODELABEL(bbram));
-	if (!device_is_ready(bbram_dev)) {
-		LOG_ERR("Error: device %s is not ready", bbram_dev->name);
-		return -1;
-	}
-
-	return 0;
-}
-SYS_INIT(chip_system_init, PRE_KERNEL_1, 15);
-
 uintptr_t system_get_fw_reset_vector(uintptr_t base)
 {
 	/*