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Input: silead - try firmware reload after unsuccessful resume

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[ Upstream commit dde27443211062e841806feaf690674b7c3a599f ]

A certain silead controller (Chip ID: 0x56810000) loses its firmware
after suspend, causing the resume to fail. This patch tries to load
the firmware, should a resume error occur and retries the resuming.

Signed-off-by: Julian Sax <jsbc@gmx.de>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Julian Sax 2018-10-05 11:48:31 -07:00 committed by Greg Kroah-Hartman
parent c13b00c394
commit 090122baa2
1 changed files with 13 additions and 0 deletions
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13
drivers/input/touchscreen/silead.c
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@ -558,20 +558,33 @@ static int __maybe_unused silead_ts_suspend(struct device *dev)
static int __maybe_unused silead_ts_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
bool second_try = false;
int error, status;
silead_ts_set_power(client, SILEAD_POWER_ON);
retry:
error = silead_ts_reset(client);
if (error)
return error;
if (second_try) {
error = silead_ts_load_fw(client);
if (error)
return error;
}
error = silead_ts_startup(client);
if (error)
return error;
status = silead_ts_get_status(client);
if (status != SILEAD_STATUS_OK) {
if (!second_try) {
second_try = true;
dev_dbg(dev, "Reloading firmware after unsuccessful resume\n");
goto retry;
}
dev_err(dev, "Resume error, status: 0x%02x\n", status);
return -ENODEV;
}