Re: [PATCH resend 03/10] Input: goodix - Make resetting the controller at probe independent from the GPIO setup
From: Bastien Nocera <hadess@hadess.net>
Date: 2020-03-02 11:14:53
On Fri, 2020-02-21 at 17:47 +0100, Hans de Goede wrote:
Before this commit we would always reset the controller at probe when we have access to the GPIOs which are necessary to do a reset. Doing the reset requires access to the GPIOs, but just because we have access to the GPIOs does not mean that we should always reset the controller at probe. On X86 ACPI platforms the BIOS / UEFI firmware will already have reset the controller and it will have loaded the device specific config into the controller. Doing the reset sometimes causes the controller to loose its configuration, so on X86 ACPI platforms this
lose.
is not a good idea. This commit adds a new reset_controller_at_probe boolean to control the reset at probe behavior. This commits sets the new bool to true when we set irq_pin_access_method to irq_pin_access_gpio, so there are no functional changes. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1786317 BugLink: https://github.com/nexus511/gpd-ubuntu-packages/issues/10 BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=199207 Cc: Dmitry Mastykin <redacted> Signed-off-by: Hans de Goede <redacted>
Looks good apart from the typo in the commit message Reviewed-by: Bastien Nocera <hadess@hadess.net>
quoted hunk ↗ jump to hunk
--- drivers/input/touchscreen/goodix.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)diff --git a/drivers/input/touchscreen/goodix.cb/drivers/input/touchscreen/goodix.c index eccf07adfae1..dd5a8f9e8ada 100644--- a/drivers/input/touchscreen/goodix.c +++ b/drivers/input/touchscreen/goodix.c@@ -56,6 +56,7 @@ struct goodix_ts_data { u16 id; u16 version; const char *cfg_name; + bool reset_controller_at_probe; bool load_cfg_from_disk; struct completion firmware_loading_complete; unsigned long irq_flags;@@ -656,6 +657,7 @@ static int goodix_get_gpio_config(structgoodix_ts_data *ts) ts->gpiod_rst = gpiod; if (ts->gpiod_int && ts->gpiod_rst) { + ts->reset_controller_at_probe = true; ts->load_cfg_from_disk = true; ts->irq_pin_access_method = irq_pin_access_gpio; }@@ -932,7 +934,7 @@ static int goodix_ts_probe(struct i2c_client*client, if (error) return error; - if (ts->irq_pin_access_method == irq_pin_access_gpio) { + if (ts->reset_controller_at_probe) { /* reset the controller */ error = goodix_reset(ts); if (error) {