From bca8e83cab7e4cc86db42eb8a646cb5374c9474c Mon Sep 17 00:00:00 2001
From: Gerson Fernando Budke <nandojve@gmail.com>
Date: Fri, 19 Jun 2020 00:30:59 -0300
Subject: [PATCH] drivers: hwinfo: sam: Add sam4l hwinfo support

Add initial version.

Signed-off-by: Gerson Fernando Budke <nandojve@gmail.com>
---
 drivers/hwinfo/CMakeLists.txt |  1 +
 drivers/hwinfo/Kconfig        | 10 +++++++++-
 drivers/hwinfo/hwinfo_sam4l.c | 30 ++++++++++++++++++++++++++++++
 3 files changed, 40 insertions(+), 1 deletion(-)
 create mode 100644 drivers/hwinfo/hwinfo_sam4l.c

diff --git a/drivers/hwinfo/CMakeLists.txt b/drivers/hwinfo/CMakeLists.txt
index 3fa1b484c9f..0ebc99ca178 100644
--- a/drivers/hwinfo/CMakeLists.txt
+++ b/drivers/hwinfo/CMakeLists.txt
@@ -9,6 +9,7 @@ zephyr_sources_ifdef(CONFIG_HWINFO_MCUX_SIM   hwinfo_mcux_sim.c)
 zephyr_sources_ifdef(CONFIG_HWINFO_ESP32      hwinfo_esp32.c)
 zephyr_sources_ifdef(CONFIG_HWINFO_IMXRT      hwinfo_imxrt.c)
 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_SHELL hwinfo_shell.c)
diff --git a/drivers/hwinfo/Kconfig b/drivers/hwinfo/Kconfig
index 51ccf90bf9c..bb8a603af50 100644
--- a/drivers/hwinfo/Kconfig
+++ b/drivers/hwinfo/Kconfig
@@ -55,11 +55,19 @@ config HWINFO_IMXRT
 config HWINFO_SAM
 	bool "Atmel SAM device ID"
 	default y
-	depends on SOC_FAMILY_SAM
+	depends on SOC_FAMILY_SAM && !SOC_SERIES_SAM4L
 	select HWINFO_HAS_DRIVER
 	help
 	  Enable Atmel SAM hwinfo driver.
 
+config HWINFO_SAM4L
+	bool "Atmel SAM4L device ID"
+	default y
+	depends on SOC_SERIES_SAM4L
+	select HWINFO_HAS_DRIVER
+	help
+	  Enable Atmel SAM4L hwinfo driver.
+
 config HWINFO_SAM0
 	bool "Atmel SAM0 device ID"
 	default y
diff --git a/drivers/hwinfo/hwinfo_sam4l.c b/drivers/hwinfo/hwinfo_sam4l.c
new file mode 100644
index 00000000000..25719be054d
--- /dev/null
+++ b/drivers/hwinfo/hwinfo_sam4l.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2020 Gerson Fernando Budke <nandojve@gmail.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#define DT_DRV_COMPAT atmel_sam4l_uid
+
+#include <device.h>
+#include <drivers/hwinfo.h>
+#include <init.h>
+#include <soc.h>
+#include <string.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 < 0) {
+		length = DT_INST_REG_SIZE(0);
+	}
+
+	memcpy(buffer, uid_addr, length);
+
+	return length;
+}