Hi Daniel, Thanks for sending this.
On Wed, Sep 18, 2019 at 02:43:16PM -0600, Daniel Campello wrote: > This change introduces a new debugfs file 'test_event' that when written > to causes the EC to generate a test event. Please mention that 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 <campe...@chromium.org> > --- > Changes for v2: > - Cleaned up and added comments. > - Renamed and updated function signature from write_to_mailbox to > send_ec_cmd. > Changes for v3: > - Switched NULL format string to empty format string > - Renamed val parameter on send_ec_cmd to out_val > Changes for v4: > - Provided a format string to avoid -Wformat-zero-length warning > > drivers/platform/chrome/wilco_ec/debugfs.c | 46 +++++++++++++++++----- > 1 file changed, 36 insertions(+), 10 deletions(-) > > diff --git a/drivers/platform/chrome/wilco_ec/debugfs.c > b/drivers/platform/chrome/wilco_ec/debugfs.c > index 8d65a1e2f1a3..ba86c38421ff 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 */ > + 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 +196,37 @@ static int h1_gpio_get(void *arg, u64 *val) > if (rs.status) > return -EIO; > > - *val = rs.val; > + *out_val = rs.val; > > return 0; > } > +/** Minor nit. Add one line of whitespace before this comment start. > + * 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 +250,8 @@ 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; > } > -- > 2.23.0.237.gc6a4ce50a0-goog > -- Benson Leung Staff Software Engineer Chrome OS Kernel Google Inc. ble...@google.com Chromium OS Project ble...@chromium.org
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