All of lore.kernel.org
 help / color / mirror / Atom feed
From: Kent Gibson <warthog618@gmail.com>
To: linux-gpio@vger.kernel.org, bgolaszewski@baylibre.com
Cc: Kent Gibson <warthog618@gmail.com>
Subject: [libgpiod][PATCH v3 08/14] tests: add tests for SET_CONFIG
Date: Mon, 25 Nov 2019 22:31:51 +0800	[thread overview]
Message-ID: <20191125143157.26154-9-warthog618@gmail.com> (raw)
In-Reply-To: <20191125143157.26154-1-warthog618@gmail.com>

Extend test coverage over the SET_CONFIG functions.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
---
 tests/tests-line.c | 370 ++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 369 insertions(+), 1 deletion(-)

diff --git a/tests/tests-line.c b/tests/tests-line.c
index 4bf7c02..97b7df9 100644
--- a/tests/tests-line.c
+++ b/tests/tests-line.c
@@ -265,6 +265,7 @@ GPIOD_TEST_CASE(set_value, 0, { 8 })
 
 	ret = gpiod_line_request_output(line, GPIOD_TEST_CONSUMER, 0);
 	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 0);
 
 	ret = gpiod_line_set_value(line, 1);
 	g_assert_cmpint(ret, ==, 0);
@@ -327,6 +328,351 @@ GPIOD_TEST_CASE(set_value_bulk, 0, { 8 })
 	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 0);
 }
 
+GPIOD_TEST_CASE(set_config_bulk_null_values, 0, { 8 })
+{
+	g_autoptr(gpiod_chip_struct) chip = NULL;
+	struct gpiod_line_bulk bulk = GPIOD_LINE_BULK_INITIALIZER;
+	struct gpiod_line *line0, *line1, *line2;
+	gint ret;
+
+	chip = gpiod_chip_open(gpiod_test_chip_path(0));
+	g_assert_nonnull(chip);
+	gpiod_test_return_if_failed();
+
+	line0 = gpiod_chip_get_line(chip, 0);
+	line1 = gpiod_chip_get_line(chip, 1);
+	line2 = gpiod_chip_get_line(chip, 2);
+
+	g_assert_nonnull(line0);
+	g_assert_nonnull(line1);
+	g_assert_nonnull(line2);
+	gpiod_test_return_if_failed();
+
+	gpiod_line_bulk_add(&bulk, line0);
+	gpiod_line_bulk_add(&bulk, line1);
+	gpiod_line_bulk_add(&bulk, line2);
+
+	ret = gpiod_line_request_bulk_output(&bulk, GPIOD_TEST_CONSUMER, 0);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_active_state(line0), ==,
+			GPIOD_LINE_ACTIVE_STATE_HIGH);
+	g_assert_cmpint(gpiod_line_active_state(line1), ==,
+			GPIOD_LINE_ACTIVE_STATE_HIGH);
+	g_assert_cmpint(gpiod_line_active_state(line2), ==,
+			GPIOD_LINE_ACTIVE_STATE_HIGH);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 0), ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 1), ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 0);
+
+	ret = gpiod_line_set_config_bulk(&bulk,
+			GPIOD_LINE_REQUEST_DIRECTION_OUTPUT,
+			GPIOD_LINE_REQUEST_FLAG_ACTIVE_LOW, NULL);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_active_state(line0), ==,
+			GPIOD_LINE_ACTIVE_STATE_LOW);
+	g_assert_cmpint(gpiod_line_active_state(line1), ==,
+			GPIOD_LINE_ACTIVE_STATE_LOW);
+	g_assert_cmpint(gpiod_line_active_state(line2), ==,
+			GPIOD_LINE_ACTIVE_STATE_LOW);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 0), ==, 1);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 1), ==, 1);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 1);
+
+	ret = gpiod_line_set_config_bulk(&bulk,
+			GPIOD_LINE_REQUEST_DIRECTION_OUTPUT, 0, NULL);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_active_state(line0), ==,
+			GPIOD_LINE_ACTIVE_STATE_HIGH);
+	g_assert_cmpint(gpiod_line_active_state(line1), ==,
+			GPIOD_LINE_ACTIVE_STATE_HIGH);
+	g_assert_cmpint(gpiod_line_active_state(line2), ==,
+			GPIOD_LINE_ACTIVE_STATE_HIGH);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 0), ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 1), ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 0);
+}
+
+GPIOD_TEST_CASE(set_flags_active_state, 0, { 8 })
+{
+	g_autoptr(gpiod_chip_struct) chip = NULL;
+	struct gpiod_line *line;
+	gint ret;
+
+	chip = gpiod_chip_open(gpiod_test_chip_path(0));
+	g_assert_nonnull(chip);
+	gpiod_test_return_if_failed();
+
+	line = gpiod_chip_get_line(chip, 2);
+	g_assert_nonnull(line);
+	gpiod_test_return_if_failed();
+
+	ret = gpiod_line_request_output(line, GPIOD_TEST_CONSUMER, 1);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_active_state(line), ==,
+			GPIOD_LINE_ACTIVE_STATE_HIGH);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 1);
+
+	ret = gpiod_line_set_flags(line, GPIOD_LINE_REQUEST_FLAG_ACTIVE_LOW);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_active_state(line), ==,
+			GPIOD_LINE_ACTIVE_STATE_LOW);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 0);
+
+	ret = gpiod_line_set_flags(line, 0);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_active_state(line), ==,
+			GPIOD_LINE_ACTIVE_STATE_HIGH);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 1);
+}
+
+GPIOD_TEST_CASE(set_flags_bias, 0, { 8 })
+{
+	g_autoptr(gpiod_chip_struct) chip = NULL;
+	struct gpiod_line *line;
+	gint ret;
+
+	chip = gpiod_chip_open(gpiod_test_chip_path(0));
+	g_assert_nonnull(chip);
+	gpiod_test_return_if_failed();
+
+	line = gpiod_chip_get_line(chip, 2);
+	g_assert_nonnull(line);
+	gpiod_test_return_if_failed();
+
+	ret = gpiod_line_request_input(line, GPIOD_TEST_CONSUMER);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_bias(line), ==, GPIOD_LINE_BIAS_AS_IS);
+
+	ret = gpiod_line_set_flags(line,
+		GPIOD_LINE_REQUEST_FLAG_BIAS_DISABLE);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_bias(line), ==, GPIOD_LINE_BIAS_DISABLE);
+
+	ret = gpiod_line_set_flags(line,
+		GPIOD_LINE_REQUEST_FLAG_BIAS_PULL_UP);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_bias(line), ==, GPIOD_LINE_BIAS_PULL_UP);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 1);
+
+	ret = gpiod_line_set_flags(line,
+		GPIOD_LINE_REQUEST_FLAG_BIAS_PULL_DOWN);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_bias(line), ==, GPIOD_LINE_BIAS_PULL_DOWN);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 0);
+}
+
+GPIOD_TEST_CASE(set_flags_drive, 0, { 8 })
+{
+	g_autoptr(gpiod_chip_struct) chip = NULL;
+	struct gpiod_line *line;
+	gint ret;
+
+	chip = gpiod_chip_open(gpiod_test_chip_path(0));
+	g_assert_nonnull(chip);
+	gpiod_test_return_if_failed();
+
+	line = gpiod_chip_get_line(chip, 2);
+	g_assert_nonnull(line);
+	gpiod_test_return_if_failed();
+
+	ret = gpiod_line_request_output(line, GPIOD_TEST_CONSUMER, 0);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_is_open_drain(line), ==, false);
+	g_assert_cmpint(gpiod_line_is_open_source(line), ==, false);
+
+	ret = gpiod_line_set_flags(line,
+		GPIOD_LINE_REQUEST_FLAG_OPEN_DRAIN);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_is_open_drain(line), ==, true);
+	g_assert_cmpint(gpiod_line_is_open_source(line), ==, false);
+
+	ret = gpiod_line_set_flags(line,
+		GPIOD_LINE_REQUEST_FLAG_OPEN_SOURCE);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_is_open_drain(line), ==, false);
+	g_assert_cmpint(gpiod_line_is_open_source(line), ==, true);
+}
+
+GPIOD_TEST_CASE(set_direction, 0, { 8 })
+{
+	g_autoptr(gpiod_chip_struct) chip = NULL;
+	struct gpiod_line *line;
+	gint ret;
+
+	chip = gpiod_chip_open(gpiod_test_chip_path(0));
+	g_assert_nonnull(chip);
+	gpiod_test_return_if_failed();
+
+	line = gpiod_chip_get_line(chip, 2);
+	g_assert_nonnull(line);
+	gpiod_test_return_if_failed();
+
+	ret = gpiod_line_request_output(line, GPIOD_TEST_CONSUMER, 0);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_direction(line), ==,
+			GPIOD_LINE_DIRECTION_OUTPUT);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 0);
+
+	ret = gpiod_line_set_direction_input(line);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_direction(line), ==,
+			GPIOD_LINE_DIRECTION_INPUT);
+
+	ret = gpiod_line_set_direction_output(line, 1);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_direction(line), ==,
+			GPIOD_LINE_DIRECTION_OUTPUT);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 1);
+}
+
+GPIOD_TEST_CASE(set_direction_bulk, 0, { 8 })
+{
+	g_autoptr(gpiod_chip_struct) chip = NULL;
+	struct gpiod_line_bulk bulk = GPIOD_LINE_BULK_INITIALIZER;
+	struct gpiod_line *line0, *line1, *line2;
+	int values[3];
+	gint ret;
+
+	chip = gpiod_chip_open(gpiod_test_chip_path(0));
+	g_assert_nonnull(chip);
+	gpiod_test_return_if_failed();
+
+	line0 = gpiod_chip_get_line(chip, 0);
+	line1 = gpiod_chip_get_line(chip, 1);
+	line2 = gpiod_chip_get_line(chip, 2);
+
+	g_assert_nonnull(line0);
+	g_assert_nonnull(line1);
+	g_assert_nonnull(line2);
+	gpiod_test_return_if_failed();
+
+	gpiod_line_bulk_add(&bulk, line0);
+	gpiod_line_bulk_add(&bulk, line1);
+	gpiod_line_bulk_add(&bulk, line2);
+
+	values[0] = 0;
+	values[1] = 1;
+	values[2] = 2;
+
+	ret = gpiod_line_request_bulk_output(&bulk,
+			GPIOD_TEST_CONSUMER, values);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_direction(line0), ==,
+			GPIOD_LINE_DIRECTION_OUTPUT);
+	g_assert_cmpint(gpiod_line_direction(line1), ==,
+			GPIOD_LINE_DIRECTION_OUTPUT);
+	g_assert_cmpint(gpiod_line_direction(line2), ==,
+			GPIOD_LINE_DIRECTION_OUTPUT);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 0), ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 1), ==, 1);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 1);
+
+	ret = gpiod_line_set_direction_input_bulk(&bulk);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_direction(line0), ==,
+			GPIOD_LINE_DIRECTION_INPUT);
+	g_assert_cmpint(gpiod_line_direction(line1), ==,
+			GPIOD_LINE_DIRECTION_INPUT);
+	g_assert_cmpint(gpiod_line_direction(line2), ==,
+			GPIOD_LINE_DIRECTION_INPUT);
+
+	values[0] = 2;
+	values[1] = 1;
+	values[2] = 0;
+
+	ret = gpiod_line_set_direction_output_bulk(&bulk, values);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_direction(line0), ==,
+			GPIOD_LINE_DIRECTION_OUTPUT);
+	g_assert_cmpint(gpiod_line_direction(line1), ==,
+			GPIOD_LINE_DIRECTION_OUTPUT);
+	g_assert_cmpint(gpiod_line_direction(line2), ==,
+			GPIOD_LINE_DIRECTION_OUTPUT);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 0), ==, 1);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 1), ==, 1);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 0);
+
+	ret = gpiod_line_set_direction_output_bulk(&bulk, NULL);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_line_direction(line0), ==,
+			GPIOD_LINE_DIRECTION_OUTPUT);
+	g_assert_cmpint(gpiod_line_direction(line1), ==,
+			GPIOD_LINE_DIRECTION_OUTPUT);
+	g_assert_cmpint(gpiod_line_direction(line2), ==,
+			GPIOD_LINE_DIRECTION_OUTPUT);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 0), ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 1), ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 0);
+}
+
+GPIOD_TEST_CASE(output_value_caching, 0, { 8 })
+{
+	g_autoptr(gpiod_chip_struct) chip = NULL;
+	struct gpiod_line *line;
+	struct gpiod_line_bulk bulk;
+	gint ret;
+
+	chip = gpiod_chip_open(gpiod_test_chip_path(0));
+	g_assert_nonnull(chip);
+	gpiod_test_return_if_failed();
+
+	line = gpiod_chip_get_line(chip, 2);
+	g_assert_nonnull(line);
+	gpiod_test_return_if_failed();
+
+	/* check cached by request... */
+	ret = gpiod_line_request_output(line, GPIOD_TEST_CONSUMER, 1);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 1);
+
+	/* ...by checking cached value applied by set_flags */
+	ret = gpiod_line_set_flags(line, 0);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 1);
+
+	/* check cached by set_value */
+	ret = gpiod_line_set_value(line, 0);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 0);
+
+	ret = gpiod_line_set_flags(line, 0);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 0);
+
+	ret = gpiod_line_set_value(line, 1);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 1);
+
+	ret = gpiod_line_set_flags(line, 0);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 1);
+
+	/* check cached by set_config */
+	ret = gpiod_line_set_config(line, GPIOD_LINE_REQUEST_DIRECTION_OUTPUT,
+				    0, 0);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 0);
+
+	ret = gpiod_line_set_flags(line, 0);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 0);
+
+	/* check cached by set_value_bulk default */
+	ret = gpiod_line_set_value(line, 1);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 1);
+
+	gpiod_line_bulk_init(&bulk);
+	gpiod_line_bulk_add(&bulk, line);
+	ret = gpiod_line_set_value_bulk(&bulk, NULL);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 0);
+
+	ret = gpiod_line_set_flags(line, 0);
+	g_assert_cmpint(ret, ==, 0);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 2), ==, 0);
+}
+
 GPIOD_TEST_CASE(get_value_different_chips, 0, { 8, 8 })
 {
 	g_autoptr(gpiod_chip_struct) chipA = NULL;
@@ -441,10 +787,11 @@ GPIOD_TEST_CASE(direction, 0, { 8 })
 	g_assert_nonnull(line);
 	gpiod_test_return_if_failed();
 
-	ret = gpiod_line_request_output(line, GPIOD_TEST_CONSUMER, 0);
+	ret = gpiod_line_request_output(line, GPIOD_TEST_CONSUMER, 1);
 	g_assert_cmpint(ret, ==, 0);
 	g_assert_cmpint(gpiod_line_direction(line), ==,
 			GPIOD_LINE_DIRECTION_OUTPUT);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 5), ==, 1);
 
 	gpiod_line_release(line);
 
@@ -482,6 +829,27 @@ GPIOD_TEST_CASE(active_state, 0, { 8 })
 
 	g_assert_cmpint(gpiod_line_direction(line), ==,
 			GPIOD_LINE_DIRECTION_INPUT);
+
+	gpiod_line_release(line);
+
+	ret = gpiod_line_request_output_flags(line, GPIOD_TEST_CONSUMER,
+			GPIOD_LINE_REQUEST_FLAG_ACTIVE_LOW, 0);
+	g_assert_cmpint(ret, ==, 0);
+
+	g_assert_cmpint(gpiod_line_direction(line), ==,
+			GPIOD_LINE_DIRECTION_OUTPUT);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 5), ==, 1);
+
+	gpiod_line_release(line);
+
+	ret = gpiod_line_request_output_flags(line,
+			GPIOD_TEST_CONSUMER, 0, 0);
+	g_assert_cmpint(ret, ==, 0);
+
+	g_assert_cmpint(gpiod_line_direction(line), ==,
+			GPIOD_LINE_DIRECTION_OUTPUT);
+	g_assert_cmpint(gpiod_test_chip_get_value(0, 5), ==, 0);
+
 }
 
 GPIOD_TEST_CASE(misc_flags, 0, { 8 })
-- 
2.24.0


  parent reply	other threads:[~2019-11-25 14:33 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-25 14:31 [libgpiod][PATCH v3 00/14] Add support for bias flags and SET_CONFIG Kent Gibson
2019-11-25 14:31 ` [libgpiod][PATCH v3 01/14] core: add support for bias flags Kent Gibson
2019-11-25 14:31 ` [libgpiod][PATCH v3 02/14] tests: add tests " Kent Gibson
2019-11-28 10:28   ` Bartosz Golaszewski
2019-11-25 14:31 ` [libgpiod][PATCH v3 03/14] bindings: cxx: add support " Kent Gibson
2019-11-28 10:29   ` Bartosz Golaszewski
2019-11-25 14:31 ` [libgpiod][PATCH v3 04/14] bindings: cxx: tests: add tests " Kent Gibson
2019-11-25 14:31 ` [libgpiod][PATCH v3 05/14] bindings: python: add support " Kent Gibson
2019-11-25 14:31 ` [libgpiod][PATCH v3 06/14] bindings: python: tests: add tests " Kent Gibson
2019-11-25 14:31 ` [libgpiod][PATCH v3 07/14] core: add support for SET_CONFIG Kent Gibson
2019-11-28 10:29   ` Bartosz Golaszewski
2019-11-25 14:31 ` Kent Gibson [this message]
2019-11-25 14:31 ` [libgpiod][PATCH v3 09/14] bindings: cxx: " Kent Gibson
2019-11-28 10:29   ` Bartosz Golaszewski
2019-11-25 14:31 ` [libgpiod][PATCH v3 10/14] bindings: cxx: tests: add tests for SET_CONFIG methods Kent Gibson
2019-11-25 14:31 ` [libgpiod][PATCH v3 11/14] bindings: python: add support for SET_CONFIG Kent Gibson
2019-11-28 10:29   ` Bartosz Golaszewski
2019-11-25 14:31 ` [libgpiod][PATCH v3 12/14] bindings: python: tests: add tests for SET_CONFIG methods Kent Gibson
2019-11-25 14:31 ` [libgpiod][PATCH v3 13/14] tools: add support for bias flags Kent Gibson
2019-11-28 10:29   ` Bartosz Golaszewski
2019-11-25 14:31 ` [libgpiod][PATCH v3 14/14] tools: add tests for bias and drive flags Kent Gibson

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20191125143157.26154-9-warthog618@gmail.com \
    --to=warthog618@gmail.com \
    --cc=bgolaszewski@baylibre.com \
    --cc=linux-gpio@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.