drivers: hwinfo: Add cypress psoc6 hwinfo support

Introduce Cypress PSoC-6 hwinfo driver.

Signed-off-by: Gerson Fernando Budke <gerson.budke@atl-electronics.com>

drivers/hwinfo/CMakeLists.txt

@@ -12,4 +12,5 @@ zephyr_sources_ifdef(CONFIG_HWINFO_SAM        hwinfo_sam.c)
 zephyr_sources_ifdef(CONFIG_HWINFO_SAM4L      hwinfo_sam4l.c)
 zephyr_sources_ifdef(CONFIG_HWINFO_SAM0       hwinfo_sam0.c)
 zephyr_sources_ifdef(CONFIG_HWINFO_LITEX      hwinfo_litex.c)
+zephyr_sources_ifdef(CONFIG_HWINFO_PSOC6      hwinfo_psoc6.c)
 zephyr_sources_ifdef(CONFIG_HWINFO_SHELL hwinfo_shell.c)

drivers/hwinfo/Kconfig

@@ -91,4 +91,13 @@ config HWINFO_LITEX
 	select HWINFO_HAS_DRIVER
 	help
 	  Enable LiteX hwinfo driver
+
+config HWINFO_PSOC6
+	bool "Cypress PSoC-6 unique device ID"
+	default y
+	depends on SOC_FAMILY_PSOC6
+	select HWINFO_HAS_DRIVER
+	help
+	  Enable Cypress PSoC-6 hwinfo driver.
+
 endif

drivers/hwinfo/hwinfo_psoc6.c

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2020 ATL Electronics
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#define DT_DRV_COMPAT cypress_psoc6_uid
+
+#include <device.h>
+#include <drivers/hwinfo.h>
+#include <init.h>
+#include <soc.h>
+#include <string.h>
+
+#include <cy_syslib.h>
+
+ssize_t z_impl_hwinfo_get_device_id(uint8_t *buffer, size_t length)
+{
+	uint8_t *uid_addr = (uint8_t *) DT_INST_REG_ADDR(0);
+
+	if (buffer == NULL) {
+		return 0;
+	}
+
+	if (length > DT_INST_REG_SIZE(0)) {
+		length = DT_INST_REG_SIZE(0);
+	}
+
+	memcpy(buffer, uid_addr, length);
+
+	return length;
+}