> -----Original Message----- > From: linux-input-owner@xxxxxxxxxxxxxxx [mailto:linux-input-owner@xxxxxxxxxxxxxxx] On Behalf Of Karsten Merker > Sent: 09 October, 2015 20:56 > To: Bastien Nocera; Dmitry Torokhov; Tirdea, Irina; Aleksei Mamlin; linux-input@xxxxxxxxxxxxxxx; Ian Campbell > Cc: devicetree@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; Chen-Yu Tsai; Karsten Merker > Subject: [PATCH RFC V2 1/3] Input: goodix - add dt axis swapping and axis inversion support > > Implement support for the following device-tree properties > in the goodix touchscreen driver: > > - touchscreen-inverted-x: X axis is inverted (boolean) > - touchscreen-inverted-y: Y axis is inverted (boolean) > - touchscreen-swapped-x-y: X and Y axis are swapped (boolean) > > These are necessary on tablets which have a display in portrait > format while the touchscreen is in landscape format, such as e.g. > the MSI Primo 81. > > Signed-off-by: Karsten Merker <merker@xxxxxxxxxx> > --- > drivers/input/touchscreen/goodix.c | 27 +++++++++++++++++++++++++++ > 1 file changed, 27 insertions(+) > > diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c > index 22bfc4b..a05bdad 100644 > --- a/drivers/input/touchscreen/goodix.c > +++ b/drivers/input/touchscreen/goodix.c > @@ -2,6 +2,7 @@ > * Driver for Goodix Touchscreens > * > * Copyright (c) 2014 Red Hat Inc. > + * Copyright (c) 2015 K. Merker <merker@xxxxxxxxxx> > * > * This code is based on gt9xx.c authored by andrew@xxxxxxxxxx: > * > @@ -53,6 +54,9 @@ struct goodix_ts_data { > atomic_t open_count; > /* Protects power management calls and access to suspended flag */ > struct mutex mutex; > + bool swapped_x_y; > + bool inverted_x; > + bool inverted_y; > }; > > #define GOODIX_GPIO_INT_NAME "irq" > @@ -271,6 +275,14 @@ static void goodix_ts_report_touch(struct goodix_ts_data *ts, u8 *coor_data) > input_y = ts->abs_y_max - input_y; > } > > + /* Inversions have to happen before axis swapping */ > + if (ts->inverted_x) > + input_x = ts->abs_x_max - input_x; > + if (ts->inverted_y) > + input_y = ts->abs_y_max - input_y; > + if (ts->swapped_x_y) > + swap(input_x, input_y); > + > input_mt_slot(ts->input_dev, id); > input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); > input_report_abs(ts->input_dev, ABS_MT_POSITION_X, input_x); > @@ -666,6 +678,8 @@ static void goodix_read_config(struct goodix_ts_data *ts) > error); > ts->abs_x_max = GOODIX_MAX_WIDTH; > ts->abs_y_max = GOODIX_MAX_HEIGHT; > + if (ts->swapped_x_y) > + swap(ts->abs_x_max, ts->abs_y_max); > ts->int_trigger_type = GOODIX_INT_TRIGGER; > ts->max_touch_num = GOODIX_MAX_CONTACTS; > return; > @@ -673,6 +687,8 @@ static void goodix_read_config(struct goodix_ts_data *ts) > > ts->abs_x_max = get_unaligned_le16(&config[RESOLUTION_LOC]); > ts->abs_y_max = get_unaligned_le16(&config[RESOLUTION_LOC + 2]); > + if (ts->swapped_x_y) > + swap(ts->abs_x_max, ts->abs_y_max); > ts->int_trigger_type = config[TRIGGER_LOC] & 0x03; > ts->max_touch_num = config[MAX_CONTACTS_LOC] & 0x0f; > if (!ts->abs_x_max || !ts->abs_y_max || !ts->max_touch_num) { > @@ -680,6 +696,8 @@ static void goodix_read_config(struct goodix_ts_data *ts) > "Invalid config, using defaults\n"); > ts->abs_x_max = GOODIX_MAX_WIDTH; > ts->abs_y_max = GOODIX_MAX_HEIGHT; > + if (ts->swapped_x_y) > + swap(ts->abs_x_max, ts->abs_y_max); > ts->max_touch_num = GOODIX_MAX_CONTACTS; > } > > @@ -950,6 +968,15 @@ static int goodix_ts_probe(struct i2c_client *client, > return 0; > } > > +#ifdef CONFIG_OF > + ts->swapped_x_y = of_property_read_bool(client->dev.of_node, > + "touchscreen-swapped-x-y"); > + ts->inverted_x = of_property_read_bool(client->dev.of_node, > + "touchscreen-inverted-x"); > + ts->inverted_y = of_property_read_bool(client->dev.of_node, > + "touchscreen-inverted-y"); > +#endif > + If interrupt and reset gpio pins are declared in the DT configuration, this code will not be executed. To make the properties available for all configurations (with/without gpio pins declared), you should read the properties inside goodix_configure_dev(). You could also use device_property_read_bool() instead, so that these properties can be used with ACPI 5.1. as well. Thanks, Irina > return goodix_configure_dev(ts); > > err_free_cfg_name: > -- > 2.1.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-input" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
