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platform/chrome: wilco_ec: Add debugfs test_event file 

This change introduces a new debugfs file 'test_event' that when written
to causes the EC to generate a test event.
This adds a second sub cmd for the test event, and pulls out send_ec_cmd
to be a common helper between h1_gpio_get and test_event_set.

Signed-off-by: Daniel Campello <campello@chromium.org>
Reviewed-by: Benson Leung <bleung@chromium.org>
Reviewed-by: Nick Crews <ncrews@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
This commit is contained in:
Daniel Campello 2019-09-24 14:37:16 -06:00 committed by Enric Balletbo i Serra
parent 54ecb8f702
commit e6679fd1e2
1 changed files with 37 additions and 10 deletions
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47
drivers/platform/chrome/wilco_ec/debugfs.c
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@ -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 */
u8 sub_cmd;
} __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 */
u8 val;
} __packed;
static int h1_gpio_get(void *arg, u64 *val)
static int send_ec_cmd(struct wilco_ec_device *ec, u8 sub_cmd, u8 *out_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;
@ -196,13 +196,38 @@ static int h1_gpio_get(void *arg, u64 *val)
if (rs.status)
return -EIO;
*val = rs.val;
*out_val = rs.val;
return 0;
}
/**
* h1_gpio_get() - Gets h1 gpio status.
* @arg: The wilco EC device.
* @val: BIT(0)=ENTRY_TO_FACT_MODE, BIT(1)=SPI_CHROME_SEL
*/
static int h1_gpio_get(void *arg, u64 *val)
{
return send_ec_cmd(arg, SUB_CMD_H1_GPIO, (u8 *)val);
}
DEFINE_DEBUGFS_ATTRIBUTE(fops_h1_gpio, h1_gpio_get, NULL, "0x%02llx\n");
/**
* test_event_set() - Sends command to EC to cause an EC test event.
* @arg: The wilco EC device.
* @val: unused.
*/
static int test_event_set(void *arg, u64 val)
{
u8 ret;
return send_ec_cmd(arg, SUB_CMD_TEST_EVENT, &ret);
}
/* Format is unused since it is only required for get method which is NULL */
DEFINE_DEBUGFS_ATTRIBUTE(fops_test_event, NULL, test_event_set, "%llu\n");
/**
* wilco_ec_debugfs_probe() - Create the debugfs node
* @pdev: The platform device, probably created in core.c
@ -226,6 +251,8 @@ 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;
}