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Tue, 12 Sep 2023 01:44:14 -0700 (PDT) From: Neil Armstrong Date: Tue, 12 Sep 2023 10:44:09 +0200 Subject: [PATCH v6 3/4] Input: goodix-berlin - add I2C support for Goodix Berlin Touchscreen IC MIME-Version: 1.0 Message-Id: <20230912-topic-goodix-berlin-upstream-initial-v6-3-b4ecfa49fb9d@linaro.org> References: <20230912-topic-goodix-berlin-upstream-initial-v6-0-b4ecfa49fb9d@linaro.org> In-Reply-To: <20230912-topic-goodix-berlin-upstream-initial-v6-0-b4ecfa49fb9d@linaro.org> To: Dmitry Torokhov Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bastien Nocera , Hans de Goede , Henrik Rydberg , Jeff LaBundy , linux-input@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Neil Armstrong X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=4476; i=neil.armstrong@linaro.org; h=from:subject:message-id; bh=fvuZaiaDmAw7atVHwbHQLhUjO6UmtXJUopSvbqmyj84=; b=owEBbQKS/ZANAwAKAXfc29rIyEnRAcsmYgBlACTabbo/LqW9p+P0nS6fY0li5bfohl5Aak5P7BZM gfVwWJGJAjMEAAEKAB0WIQQ9U8YmyFYF/h30LIt33NvayMhJ0QUCZQAk2gAKCRB33NvayMhJ0d3oEA C5Xy+znUA+pM51v0zdR5Xp6KDzsMC2Z520vt0nZB84HrdgLIJNqq8M60lPbSe9EqaSGr5kvM9KUVhP HkOeS/JY5G228YvMoH0HGDAXMswNhSzCSg0zs5rtekjJ/TWmQKiWW9YRp+h7gudmBHyfy7F++cfeP2 PiQo9AXxWvGsq2e/+nUEbwY4Tc7ax+eT+c7VC5bYQ1izLMtQRqSgsQmlH/4QEFL6+Mw2JX3Nm9vEpA RfuNDS1DvhuDT7jlxUH5JCRj1XpWZmkWmLCAWK3SI8cibBby9IEGD9+7Kw1s/Dy+xYW/iDJ1bhmW8B 0H17dm44lHUb2RTRfJ9jNpwOVoGx9AqAtBvaD3HJ8KXsWu0KVsUGw0zJBmFyXegO0swlqBPvQz41mj 4cBTUPoDAZWJoHzNJYc7elQ5M+gYNTCjEI1f0aK0khPc8sfLwU3Oq1HoOySL3znCwmZX8pXePZ5R8T 11Z+mL0sjtEWVW/wb49dnspUAqnhiNH/8b7PE6uDEAvUMY6cGciEyXMYyBGHUvsuak+pJ3l7HbMVS5 K02P5FRP2pjdb/e+FEsm9GOF+tCnOw6qAoES9MM+xRQFwk+0EyhhO0FNoY7BvvIrLFyt34/auvGvZ2 bRG9L/0PKYETTTrm+V0pGlp12DcfN+O9J+PFnr5gOCz1IY8vfFiMZFfWkY6Q== X-Developer-Key: i=neil.armstrong@linaro.org; a=openpgp; fpr=89EC3D058446217450F22848169AB7B1A4CFF8AE Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Tue, 12 Sep 2023 01:45:13 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1776892601121577577 X-GMAIL-MSGID: 1776892601121577577 Add initial support for the new Goodix "Berlin" touchscreen ICs over the I2C interface. This initial driver is derived from the Goodix goodix_ts_berlin available at [1] and [2] and only supports the GT9916 IC present on the Qualcomm SM8550 MTP & QRD touch panel. The current implementation only supports BerlinD, aka GT9916. [1] https://github.com/goodix/goodix_ts_berlin [2] https://git.codelinaro.org/clo/la/platform/vendor/opensource/touch-drivers Reviewed-by: Jeff LaBundy Signed-off-by: Neil Armstrong --- drivers/input/touchscreen/Kconfig | 14 ++++++ drivers/input/touchscreen/Makefile | 1 + drivers/input/touchscreen/goodix_berlin_i2c.c | 69 +++++++++++++++++++++++++++ 3 files changed, 84 insertions(+) diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index 950da599ae1a..cc7b88118158 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -419,6 +419,20 @@ config TOUCHSCREEN_GOODIX config TOUCHSCREEN_GOODIX_BERLIN_CORE tristate +config TOUCHSCREEN_GOODIX_BERLIN_I2C + tristate "Goodix Berlin I2C touchscreen" + depends on I2C + select REGMAP_I2C + select TOUCHSCREEN_GOODIX_BERLIN_CORE + help + Say Y here if you have a Goodix Berlin IC connected to + your system via I2C. + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called goodix_berlin_i2c. + config TOUCHSCREEN_HIDEEP tristate "HiDeep Touch IC" depends on I2C diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile index 2e2f3e70cd2c..7ef677cf7a10 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -48,6 +48,7 @@ obj-$(CONFIG_TOUCHSCREEN_EXC3000) += exc3000.o obj-$(CONFIG_TOUCHSCREEN_FUJITSU) += fujitsu_ts.o obj-$(CONFIG_TOUCHSCREEN_GOODIX) += goodix_ts.o obj-$(CONFIG_TOUCHSCREEN_GOODIX_BERLIN_CORE) += goodix_berlin_core.o +obj-$(CONFIG_TOUCHSCREEN_GOODIX_BERLIN_I2C) += goodix_berlin_i2c.o obj-$(CONFIG_TOUCHSCREEN_HIDEEP) += hideep.o obj-$(CONFIG_TOUCHSCREEN_HYNITRON_CSTXXX) += hynitron_cstxxx.o obj-$(CONFIG_TOUCHSCREEN_ILI210X) += ili210x.o diff --git a/drivers/input/touchscreen/goodix_berlin_i2c.c b/drivers/input/touchscreen/goodix_berlin_i2c.c new file mode 100644 index 000000000000..6407b2258eb1 --- /dev/null +++ b/drivers/input/touchscreen/goodix_berlin_i2c.c @@ -0,0 +1,69 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Goodix Berlin Touchscreen Driver + * + * Copyright (C) 2020 - 2021 Goodix, Inc. + * Copyright (C) 2023 Linaro Ltd. + * + * Based on goodix_ts_berlin driver. + */ +#include +#include +#include +#include + +#include "goodix_berlin.h" + +#define I2C_MAX_TRANSFER_SIZE 256 + +static const struct regmap_config goodix_berlin_i2c_regmap_conf = { + .reg_bits = 32, + .val_bits = 8, + .max_raw_read = I2C_MAX_TRANSFER_SIZE, + .max_raw_write = I2C_MAX_TRANSFER_SIZE, +}; + +/* vendor & product left unassigned here, should probably be updated from fw info */ +static const struct input_id goodix_berlin_i2c_input_id = { + .bustype = BUS_I2C, +}; + +static int goodix_berlin_i2c_probe(struct i2c_client *client) +{ + struct regmap *regmap; + + regmap = devm_regmap_init_i2c(client, &goodix_berlin_i2c_regmap_conf); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + return goodix_berlin_probe(&client->dev, client->irq, + &goodix_berlin_i2c_input_id, regmap); +} + +static const struct i2c_device_id goodix_berlin_i2c_id[] = { + { "gt9916", 0 }, + { } +}; + +MODULE_DEVICE_TABLE(i2c, goodix_berlin_i2c_id); + +static const struct of_device_id goodix_berlin_i2c_of_match[] = { + { .compatible = "goodix,gt9916", }, + { } +}; +MODULE_DEVICE_TABLE(of, goodix_berlin_i2c_of_match); + +static struct i2c_driver goodix_berlin_i2c_driver = { + .driver = { + .name = "goodix-berlin-i2c", + .of_match_table = goodix_berlin_i2c_of_match, + .pm = pm_sleep_ptr(&goodix_berlin_pm_ops), + }, + .probe = goodix_berlin_i2c_probe, + .id_table = goodix_berlin_i2c_id, +}; +module_i2c_driver(goodix_berlin_i2c_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Goodix Berlin I2C Touchscreen driver"); +MODULE_AUTHOR("Neil Armstrong ");