Commit e6679fd1 authored by Daniel Campello's avatar Daniel Campello Committed by Enric Balletbo i Serra
Browse files

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: default avatarDaniel Campello <campello@chromium.org>
Reviewed-by: default avatarBenson Leung <bleung@chromium.org>
Reviewed-by: default avatarNick Crews <ncrews@chromium.org>
Signed-off-by: default avatarEnric Balletbo i Serra <enric.balletbo@collabora.com>
parent 54ecb8f7

drivers/platform/chrome/wilco_ec/debugfs.c

+37 −10
Original line number Diff line number Diff line
@@ -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;

}

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