Hi Dmitry, When the trackpoint device receives this command, it enters the power saving mode (power consumption <400uA), the trackpoint would be woken up after touching it. This patch was tested on 5.4, do we have to test it again on 5.10? Thanks, Josh -----Original Message----- From: Jingle.Wu [mailto:jingle.wu@xxxxxxxxxx] Sent: Thursday, March 24, 2022 9:13 AM To: 'Dmitry Torokhov'; 'Dave.Wang'; 'Josh.Chen' Cc: linux-kernel@xxxxxxxxxxxxxxx; linux-input@xxxxxxxxxxxxxxx; phoenix@xxxxxxxxxx; 'jingle.wu' Subject: RE: [PATCH] Input: trackpoint - Add Suspend mode for Elan TrackPoint Loop Josh, Dave. -----Original Message----- From: Dmitry Torokhov [mailto:dmitry.torokhov@xxxxxxxxx] Sent: Thursday, March 24, 2022 1:28 AM To: jingle.wu <jingle.wu@xxxxxxxxxx> Cc: linux-kernel@xxxxxxxxxxxxxxx; linux-input@xxxxxxxxxxxxxxx; phoenix@xxxxxxxxxx; jingle.wu <jingle.wu@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> Subject: Re: [PATCH] Input: trackpoint - Add Suspend mode for Elan TrackPoint Hi Jingle, On Fri, Sep 04, 2020 at 10:42:31AM +0800, jingle.wu wrote: > From: "jingle.wu" <jingle.wu@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> > > Add suspend command for elan trackpoint Could you please elaborate what this mode does to the trackpint? Also, your signed-off-by is missing. > --- > drivers/input/mouse/trackpoint.c | 16 ++++++++++++++++ > drivers/input/mouse/trackpoint.h | 1 + > 2 files changed, 17 insertions(+) > > diff --git a/drivers/input/mouse/trackpoint.c > b/drivers/input/mouse/trackpoint.c > index 3eefee2ee2a1..b3cba973a4eb 100644 > --- a/drivers/input/mouse/trackpoint.c > +++ b/drivers/input/mouse/trackpoint.c > @@ -389,6 +389,20 @@ static int trackpoint_reconnect(struct psmouse *psmouse) > return 0; > } > > +static void trackpoint_cleanup(struct psmouse *psmouse) { > + struct trackpoint_data *tp = psmouse->private; > + u8 param[3] = { TP_TOGGLE, TP_TOGGLE_BURST, TP_TOGGLE_ELAN_SLEEP }; > + > + if (tp->variant_id == TP_VARIANT_ELAN) { > + if (ps2_command(&psmouse->ps2dev, param, I'd combine the 2 "ifs". > + MAKE_PS2_CMD(3, 0, TP_COMMAND))) { > + psmouse_err(psmouse, psmouse_warn() since it is not a hard error. > + "failed to suspend trackpont.\n"); I'd say "failed to suspend Elan trackpont\n". > + } > + } > +} > + > int trackpoint_detect(struct psmouse *psmouse, bool set_properties) { > struct ps2dev *ps2dev = &psmouse->ps2dev; @@ -421,6 +435,8 @@ int > trackpoint_detect(struct psmouse *psmouse, bool set_properties) > psmouse->reconnect = trackpoint_reconnect; > psmouse->disconnect = trackpoint_disconnect; > > + psmouse->cleanup = trackpoint_cleanup; > + > if (variant_id != TP_VARIANT_IBM) { > /* Newer variants do not support extended button query. */ > button_info = 0x33; > diff --git a/drivers/input/mouse/trackpoint.h > b/drivers/input/mouse/trackpoint.h > index 5cb93ed26085..c7fa75452976 100644 > --- a/drivers/input/mouse/trackpoint.h > +++ b/drivers/input/mouse/trackpoint.h > @@ -107,6 +107,7 @@ > #define TP_TOGGLE_EXT_TAG 0x22 /* Bit 3 of the first packet coming from the > external device will be forced to 1 */ > #define TP_MASK_EXT_TAG 0x04 > +#define TP_TOGGLE_ELAN_SLEEP 0x8 It seems to me that TP_TOGGLE_ELAN_SLEEP is a bit in TP_TOGGLE_BURST subcommand, so it is better to move it next to TP_MASK_BURST and call it TP_MASK_ELAN_SLEEP to match the rest. Thanks. -- Dmitry
