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Subject[PATCH] platform/chrome: wilco_ec: Add debugfs test_event file
Date
This change introduces a new debugfs file 'test_event' that when written
to causes the EC to generate a test event.

Signed-off-by: Daniel Campello <campello@chromium.org>
---

drivers/platform/chrome/wilco_ec/debugfs.c | 33 +++++++++++++++++-----
1 file changed, 26 insertions(+), 7 deletions(-)

diff --git a/drivers/platform/chrome/wilco_ec/debugfs.c b/drivers/platform/chrome/wilco_ec/debugfs.c
index 8d65a1e2f1a3..2103c3ed8385 100644
--- a/drivers/platform/chrome/wilco_ec/debugfs.c
+++ b/drivers/platform/chrome/wilco_ec/debugfs.c
@@ -160,29 +160,29 @@ static const struct file_operations fops_raw = {

#define CMD_KB_CHROME 0x88
#define SUB_CMD_H1_GPIO 0x0A
+#define SUB_CMD_TEST_EVENT 0x0B

-struct h1_gpio_status_request {
+struct ec_request {
u8 cmd; /* Always CMD_KB_CHROME */
u8 reserved;
u8 sub_cmd; /* Always SUB_CMD_H1_GPIO */
} __packed;

-struct hi_gpio_status_response {
+struct ec_response {
u8 status; /* 0 if allowed */
u8 val; /* BIT(0)=ENTRY_TO_FACT_MODE, BIT(1)=SPI_CHROME_SEL */
} __packed;

-static int h1_gpio_get(void *arg, u64 *val)
+static int write_to_mailbox(struct wilco_ec_device *ec, u8 sub_cmd, u64 *val)
{
- struct wilco_ec_device *ec = arg;
- struct h1_gpio_status_request rq;
- struct hi_gpio_status_response rs;
+ struct ec_request rq;
+ struct ec_response rs;
struct wilco_ec_message msg;
int ret;

memset(&rq, 0, sizeof(rq));
rq.cmd = CMD_KB_CHROME;
- rq.sub_cmd = SUB_CMD_H1_GPIO;
+ rq.sub_cmd = sub_cmd;

memset(&msg, 0, sizeof(msg));
msg.type = WILCO_EC_MSG_LEGACY;
@@ -201,8 +201,25 @@ static int h1_gpio_get(void *arg, u64 *val)
return 0;
}

+static int h1_gpio_get(void *arg, u64 *val)
+{
+ return write_to_mailbox(arg, SUB_CMD_H1_GPIO, val);
+}
+
DEFINE_DEBUGFS_ATTRIBUTE(fops_h1_gpio, h1_gpio_get, NULL, "0x%02llx\n");

+static int test_event_set(void *arg, u64 val)
+{
+ u64 ret;
+
+ return write_to_mailbox(arg, SUB_CMD_TEST_EVENT, &ret);
+}
+
+/* Format set to NULL since it is only used on read operations which are
+ * forbidden by file permissions.
+ */
+DEFINE_DEBUGFS_ATTRIBUTE(fops_test_event, NULL, test_event_set, NULL);
+
/**
* wilco_ec_debugfs_probe() - Create the debugfs node
* @pdev: The platform device, probably created in core.c
@@ -226,6 +243,8 @@ static int wilco_ec_debugfs_probe(struct platform_device *pdev)
debugfs_create_file("raw", 0644, debug_info->dir, NULL, &fops_raw);
debugfs_create_file("h1_gpio", 0444, debug_info->dir, ec,
&fops_h1_gpio);
+ debugfs_create_file("test_event", 0200, debug_info->dir, ec,
+ &fops_test_event);

return 0;
}
--
2.23.0.162.g0b9fbb3734-goog
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