Move ADC console command to common

We have three duplicated ADC read console command, and we are about to
have the fourth. Let's consolidate them to a single implementation in
common/.

Note that we have to add a simple implementation of
adc_read_all_channels() for LM4.

BUG=chrome-os-partner:18343
TEST=Build all boards
TEST=Read single channel
TEST=Read all channels
BRANCH=None

Change-Id: I079c0b33ab6b81a188f309cf99875eb02e9d78a4
Signed-off-by: Vic (Chun-Ju) Yang <victoryang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/180831

2 files changed, 58 insertions, 0 deletions

diff --git a/common/adc.c b/common/adc.c
new file mode 100644
index 0000000000..696b017788
--- /dev/null
+++ b/common/adc.c
@@ -0,0 +1,57 @@
+/* Copyright (c) 2013 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.
+ */
+
+/* ADC module for Chrome EC */
+
+#include "adc.h"
+#include "adc_chip.h"
+#include "common.h"
+#include "console.h"
+#include "util.h"
+
+static enum adc_channel find_adc_channel_by_name(const char *name)
+{
+	const struct adc_t *ch = adc_channels;
+	int i;
+
+	if (!name || !*name)
+		return ADC_CH_COUNT;
+
+	for (i = 0; i < ADC_CH_COUNT; i++, ch++) {
+		if (!strcasecmp(name, ch->name))
+			return i;
+	}
+
+	return ADC_CH_COUNT;
+}
+
+static int command_adc(int argc, char **argv)
+{
+	int i, v;
+	int data[ADC_CH_COUNT];
+
+	/* If a channel is specified, read only that one */
+	if (argc == 2) {
+		i = find_adc_channel_by_name(argv[1]);
+		if (i == ADC_CH_COUNT)
+			return EC_ERROR_PARAM1;
+		v = adc_read_channel(i);
+		if (v == ADC_READ_ERROR)
+			return EC_ERROR_UNKNOWN;
+		ccprintf("  %s = %d\n", adc_channels[i].name, v);
+		return EC_SUCCESS;
+	} else {
+		/* Otherwise print them all */
+		if (adc_read_all_channels(data))
+			return EC_ERROR_UNKNOWN;
+		for (i = 0; i < ADC_CH_COUNT; ++i)
+			ccprintf("  %s = %d\n", adc_channels[i].name, data[i]);
+		return EC_SUCCESS;
+	}
+}
+DECLARE_CONSOLE_COMMAND(adc, command_adc,
+			"[name]",
+			"Print ADC channel(s)",
+			NULL);
diff --git a/common/build.mk b/common/build.mk
index 9e4b6c7fa3..b1ac341891 100644
--- a/common/build.mk
+++ b/common/build.mk
@@ -10,6 +10,7 @@ common-y=main.o util.o console_output.o uart_buffering.o
 common-y+=memory_commands.o shared_mem.o system.o hooks.o
 common-y+=gpio.o version.o printf.o queue.o
 
+common-$(CONFIG_ADC)+=adc.o
 common-$(CONFIG_ALS)+=als.o
 common-$(CONFIG_AP_HANG_DETECT)+=ap_hang_detect.o
 common-$(CONFIG_BACKLIGHT_LID)+=backlight_lid.o