[PATCH] [v9] platform/chrome: cros_ec_lpc: Move host command to prepare/complete

From: Tim Van Patten
Date: Mon May 15 2023 - 16:26:17 EST

Update cros_ec_lpc_pm_ops to call cros_ec_lpc_prepare() during PM
.prepare() and cros_ec_lpc_complete() during .complete(). This moves the
host command that the AP sends and allows the EC to log entry/exit of
AP's suspend/resume more accurately.

Changes in v9:
- Remove log statements.
- Ignore return value from cros_ec_resume().

Changes in v8:
- Resend with chromium.org account.
- No code changes.

Changes in v7:
- Rename "host event" to "host command" in title/description.

Changes in v6:
- Fully restore fixes from v3.

Changes in v5:
- Restore fixes from v3.

Changes in v4:
- Update title and description.

Changes in v3:
- Update cros_ec_lpc_suspend() to cros_ec_lpc_prepare()
- Update cros_ec_lpc_resume() to cros_ec_lpc_complete()

Changes in v2:
- Include cros_ec_resume() return value in dev_info() output.
- Guard setting .prepare/.complete with #ifdef CONFIG_PM_SLEEP.

Reviewed-by: Raul E Rangel <rrangel@xxxxxxxxxxxx>
Signed-off-by: Tim Van Patten <timvp@xxxxxxxxxxxx>

drivers/platform/chrome/cros_ec_lpc.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c
index 68bba0fcafab3..2318eccd9c6ad 100644
--- a/drivers/platform/chrome/cros_ec_lpc.c
+++ b/drivers/platform/chrome/cros_ec_lpc.c
@@ -543,23 +543,25 @@ static const struct dmi_system_id cros_ec_lpc_dmi_table[] __initconst = {
MODULE_DEVICE_TABLE(dmi, cros_ec_lpc_dmi_table);

-static int cros_ec_lpc_suspend(struct device *dev)
+static int cros_ec_lpc_prepare(struct device *dev)
struct cros_ec_device *ec_dev = dev_get_drvdata(dev);

return cros_ec_suspend(ec_dev);

-static int cros_ec_lpc_resume(struct device *dev)
+static void cros_ec_lpc_complete(struct device *dev)
struct cros_ec_device *ec_dev = dev_get_drvdata(dev);
- return cros_ec_resume(ec_dev);
+ cros_ec_resume(ec_dev);

static const struct dev_pm_ops cros_ec_lpc_pm_ops = {
- SET_LATE_SYSTEM_SLEEP_PM_OPS(cros_ec_lpc_suspend, cros_ec_lpc_resume)
+ .prepare = cros_ec_lpc_prepare,
+ .complete = cros_ec_lpc_complete

static struct platform_driver cros_ec_lpc_driver = {