[U-Boot] [PATCH 25/32] cros_ec: Move EC interface into common library

[Simon Glass]

From: Vadim Bendebury <vbendeb at chromium.org>

Add a common library for obtaining access to the Chrome OS EC. This is
used by boards which need to talk to the EC.

Signed-off-by: Vadim Bendebury <vbendeb at chromium.org>
Signed-off-by: Simon Glass <sjg at chromium.org>
Reviewed-by: Vadim Bendebury <vbendeb at google.com>
Tested-by: Vadim Bendebury <vbendeb at google.com>
---
 board/samsung/smdk5250/exynos5-dt.c |  5 -----
 common/Makefile                     |  1 +
 common/cros_ec.c                    | 44 +++++++++++++++++++++++++++++++++++++
 include/cros_ec.h                   | 18 +++++++++++++++
 4 files changed, 63 insertions(+), 5 deletions(-)
 create mode 100644 common/cros_ec.c

diff --git a/board/samsung/smdk5250/exynos5-dt.c b/board/samsung/smdk5250/exynos5-dt.c
index 6bcc883..35888fd 100644
--- a/board/samsung/smdk5250/exynos5-dt.c
+++ b/board/samsung/smdk5250/exynos5-dt.c
@@ -73,11 +73,6 @@ static void  board_enable_audio_codec(void)
 }
 #endif
 
-struct cros_ec_dev *board_get_cros_ec_dev(void)
-{
-	return local.cros_ec_dev;
-}
-
 static int board_init_cros_ec_devices(const void *blob)
 {
 	local.cros_ec_err = cros_ec_init(blob, &local.cros_ec_dev);
diff --git a/common/Makefile b/common/Makefile
index 32acbf9..2ba9880 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -222,6 +222,7 @@ obj-$(SPD) += ddr_spd.o
 obj-$(CONFIG_HWCONFIG) += hwconfig.o
 obj-$(CONFIG_BOUNCE_BUFFER) += bouncebuf.o
 obj-y += console.o
+obj-$(CONFIG_CROS_EC) += cros_ec.o
 obj-y += dlmalloc.o
 obj-y += image.o
 obj-$(CONFIG_OF_LIBFDT) += image-fdt.o
diff --git a/common/cros_ec.c b/common/cros_ec.c
new file mode 100644
index 0000000..b8ce1b5
--- /dev/null
+++ b/common/cros_ec.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ */
+
+#include <common.h>
+#include <cros_ec.h>
+DECLARE_GLOBAL_DATA_PTR;
+
+struct local_info {
+	struct cros_ec_dev *cros_ec_dev;	/* Pointer to cros_ec device */
+	int cros_ec_err;			/* Error for cros_ec, 0 if ok */
+};
+
+static struct local_info local;
+
+struct cros_ec_dev *board_get_cros_ec_dev(void)
+{
+	return local.cros_ec_dev;
+}
+
+static int board_init_cros_ec_devices(const void *blob)
+{
+	local.cros_ec_err = cros_ec_init(blob, &local.cros_ec_dev);
+	if (local.cros_ec_err)
+		return -1;  /* Will report in board_late_init() */
+
+	return 0;
+}
+
+int cros_ec_board_init(void)
+{
+	return board_init_cros_ec_devices(gd->fdt_blob);
+}
+
+int cros_ec_get_error(void)
+{
+	return local.cros_ec_err;
+}
diff --git a/include/cros_ec.h b/include/cros_ec.h
index 1e89f29..22eae90 100644
--- a/include/cros_ec.h
+++ b/include/cros_ec.h
@@ -431,4 +431,22 @@ int cros_ec_set_ldo(struct cros_ec_dev *dev, uint8_t index, uint8_t state);
  * @return 0 if ok, -1 on error
  */
 int cros_ec_get_ldo(struct cros_ec_dev *dev, uint8_t index, uint8_t *state);
+
+/**
+ * Initialize the Chrome OS EC at board initialization time.
+ *
+ * @return 0 if ok, -ve on error
+ */
+int cros_ec_board_init(void);
+
+/**
+ * Get access to the error reported when cros_ec_board_init() was called
+ *
+ * This permits delayed reporting of the EC error if it failed during
+ * early init.
+ *
+ * @return error (0 if there was no error, -ve if there was an error)
+ */
+int cros_ec_get_error(void);
+
 #endif
-- 
1.8.4.1