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Thu, 22 Jun 2023 07:29:06 -0700 (PDT) From: Neil Armstrong Date: Thu, 22 Jun 2023 16:29:01 +0200 Subject: [PATCH v3 3/4] input: touchscreen: add I2C support for Goodix Berlin Touchscreen IC MIME-Version: 1.0 Message-Id: <20230606-topic-goodix-berlin-upstream-initial-v3-3-f0577cead709@linaro.org> References: <20230606-topic-goodix-berlin-upstream-initial-v3-0-f0577cead709@linaro.org> In-Reply-To: <20230606-topic-goodix-berlin-upstream-initial-v3-0-f0577cead709@linaro.org> To: Dmitry Torokhov , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bastien Nocera , Hans de Goede , Henrik Rydberg , Jeff LaBundy Cc: 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 0.12.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=4427; i=neil.armstrong@linaro.org; h=from:subject:message-id; bh=QHOGGZ9YgSGmH3eo15UAb80SbAazpeBZYECMck5eCmA=; b=owEBbQKS/ZANAwAKAXfc29rIyEnRAcsmYgBklFqtJTXz1Yb3QLVMB2aa+JFRKv2PowPhKbow9/XC O+Hvi1GJAjMEAAEKAB0WIQQ9U8YmyFYF/h30LIt33NvayMhJ0QUCZJRarQAKCRB33NvayMhJ0Y8JD/ 9ivhtmNdp1mrE1aRxjMQ0UKhLpSTc48h/xeXgc3S1km0hnBkfnqEGnWke7YOnghiIgB+q9liGh1b18 MPVN/QvDLiU04weCkbKxBI1DjBb7pO0H8Sm36YbZv4vv33VcYEl1Vg8XFMxWBD8yV29PB7xk9peO66 RCXSEphHxCqaNuOqED/yw7LYwU05KE/PBhOI9Q4o1mk9q5BoqZVaYGWRhXtfRsFRMfqml/6mUTKwDM 6O4bOERw7fKf+pAroqACLTurqp2PXNbdlumlD0pVLv5ABe8oAAxycgLvXeq14wHSwsLJ543DF1dyam WIkgvaYM9Wp7KBf19jtqoRsS73akcQ51J/+wEWqqxcccGbSH8U8mXmuW8zvsIl0FfLoRxBREPfbJNL dYkn3jHXpjifsmGPpbS22pfAk73gZ2LMa8St9/OceXMC49euEV/iodhhW9AORryvCAVv0YEaRRS2ky /62LcuMFzIuID1o96zyVY6OG5PvnLIchbNkhTzYwyv/LlS1d8094wM/tIz/WV9Sx1aUOYUqHcZ1yV9 HEsyxDcSlYYf/WMnRcGutEqYIxkv7IaMPP/MqvXRG/PBCnGW77j/D3NGg2d14VEykweQIeJ1uItez5 l6+RyJxoEw7upQI5RXGJiZeRyTjb3c0n2ck8FZns2T5Tm73Kw27kAcJYSzGQ== X-Developer-Key: i=neil.armstrong@linaro.org; a=openpgp; fpr=89EC3D058446217450F22848169AB7B1A4CFF8AE Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org 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 Signed-off-by: Neil Armstrong Reviewed-by: Jeff LaBundy --- 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 1a6f6f6da991..5e21cca6025d 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -421,6 +421,20 @@ config TOUCHSCREEN_GOODIX_BERLIN_CORE depends on REGMAP tristate +config TOUCHSCREEN_GOODIX_BERLIN_I2C + tristate "Goodix Berlin I2C touchscreen" + depends on I2C + depends on 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 29cdb042e104..921a2da0c2be 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 ");