From patchwork Tue Mar 10 14:28:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Linus Walleij X-Patchwork-Id: 11429525 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 107D814BC for ; Tue, 10 Mar 2020 14:28:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E4C6C24649 for ; Tue, 10 Mar 2020 14:28:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="B4y7OjNp" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727083AbgCJO2a (ORCPT ); Tue, 10 Mar 2020 10:28:30 -0400 Received: from mail-lj1-f170.google.com ([209.85.208.170]:37707 "EHLO mail-lj1-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726423AbgCJO2a (ORCPT ); Tue, 10 Mar 2020 10:28:30 -0400 Received: by mail-lj1-f170.google.com with SMTP id r24so749133ljd.4 for ; Tue, 10 Mar 2020 07:28:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=oq2TUuJgjX8T14WhhZPEa3jJeXtGZIthBibLM1uWq8A=; b=B4y7OjNpycQJv6Tb/xr1QLVim7t9Rw8XWToJWkDcaNxG9b31kY9FLflt0xSCgHsr3p 4OxOscuD7+1WlZM8Z6yPR2FEv3jPoRS3BQh0ooPAh9DUlGyC5MTCQ5EPBNwe9DllzIgq 43qutTr/l56boxw/0lKLbeVMmuVym8k8PciM8NQkBo9uPWvV1cDjRLyTosojKZzHa/8+ FCmfAi9SMgZORKu86H/xYV+Fa67I4Mx7fHK7ebJB4h0PkG/VVU7pKf0G3X7S6hSxjeOT BCn12Zs4J90U/OXN0cuNiwshEEG3wiUi6C5MhXNFrHixo7S3rp+X9lXS30w/rqdO8BWD Hnnw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=oq2TUuJgjX8T14WhhZPEa3jJeXtGZIthBibLM1uWq8A=; b=Eu/xLqlnAbycIcxkn4OvKqEsXGXhw8SiMr36IRWEP+ZF7m5aEUtVzkH5A7k/J524bN QeRvg8wYTwmMZbaCJU/eRf0wMznnjz52uqrdxYYHeP3sMNMKo5xez4m/63UGl/YhsIKy irkFNqC1LOFMLirTf/k67ymGXuSDmsvj7Q6UlOiZ5/cBFGH/R92/hurnOzPKKGp32tb+ MwT6fGeqy0DP/dQ2frkke0cCoO1DbVEguIO8+nLru9Vpgf4EHglqB1BUQzsrWvMOEmRm dNb6SSn7GgtOjt42EP7eN28JbFbkcxvOUc5uffHSBDpo297+uC2q92zFslXreWPkuwqY S6gQ== X-Gm-Message-State: ANhLgQ16MixAgkDIoo6G2QzZHVOmoNES/HJaUXsWgj3wHC967PAUhKPA gY9NtbxOeTP75An0S+EEtPuiIw== X-Google-Smtp-Source: ADFU+vvWFKIWGUtl92EE1gL69n4Km/arGy5lK3kwV/k5xtRJ9+eceWgnrlqtuXL4yqKtwzeQnFUQZQ== X-Received: by 2002:a2e:9590:: with SMTP id w16mr12879556ljh.113.1583850507090; Tue, 10 Mar 2020 07:28:27 -0700 (PDT) Received: from localhost.bredbandsbolaget (c-5ac9225c.014-348-6c756e10.bbcust.telenor.se. [92.34.201.90]) by smtp.gmail.com with ESMTPSA id w24sm22794505ljh.26.2020.03.10.07.28.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Mar 2020 07:28:26 -0700 (PDT) From: Linus Walleij To: Dmitry Torokhov , linux-input@vger.kernel.org Cc: Linus Walleij , devicetree@vger.kernel.org, Ferruh Yigit , Henrik Rydberg Subject: [PATCH 1/2 v1] dt-bindings: touchscreen: Add CY8CTMA140 bindings Date: Tue, 10 Mar 2020 15:28:17 +0100 Message-Id: <20200310142818.15415-1-linus.walleij@linaro.org> X-Mailer: git-send-email 2.21.1 MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org This adds device tree bindings for the Cypress CY8CTMA140 touchscreen. Cc: devicetree@vger.kernel.org Cc: Ferruh Yigit Cc: Henrik Rydberg Signed-off-by: Linus Walleij Reviewed-by: Rob Herring --- .../input/touchscreen/cypress,cy8ctma140.yaml | 72 +++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/touchscreen/cypress,cy8ctma140.yaml diff --git a/Documentation/devicetree/bindings/input/touchscreen/cypress,cy8ctma140.yaml b/Documentation/devicetree/bindings/input/touchscreen/cypress,cy8ctma140.yaml new file mode 100644 index 000000000000..66b488e48b74 --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/cypress,cy8ctma140.yaml @@ -0,0 +1,72 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/input/touchscreen/cypress,cy8ctma140.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Cypress CY8CTMA140 series touchscreen controller bindings + +maintainers: + - Linus Walleij + +allOf: + - $ref: touchscreen.yaml# + +properties: + compatible: + const: cypress,cy8ctma140 + + reg: + description: I2C client address, defined by hardware + const: 0x20 + + clock-frequency: + description: I2C client max frequency, defined by hardware + const: 400000 + + interrupts: + maxItems: 1 + + vcpin-supply: + description: Analog power supply regulator on VCPIN pin + + vdd-supply: + description: Digital power supply regulator on VDD pin + + touchscreen-inverted-x: true + touchscreen-inverted-y: true + touchscreen-size-x: true + touchscreen-size-y: true + touchscreen-swapped-x-y: true + touchscreen-max-pressure: true + +additionalProperties: false + +required: + - compatible + - reg + - interrupts + - touchscreen-size-x + - touchscreen-size-y + - touchscreen-max-pressure + +examples: +- | + #include + i2c@00000000 { + #address-cells = <1>; + #size-cells = <0>; + touchscreen@20 { + compatible = "cypress,cy8ctma140"; + reg = <0x20>; + touchscreen-size-x = <480>; + touchscreen-size-y = <800>; + touchscreen-max-pressure = <255>; + interrupt-parent = <&gpio6>; + interrupts = <26 IRQ_TYPE_EDGE_FALLING>; + vdd-supply = <&ab8500_ldo_aux2_reg>; + vcpin-supply = <&ab8500_ldo_aux2_reg>; + }; + }; + +... From patchwork Tue Mar 10 14:28:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Linus Walleij X-Patchwork-Id: 11429527 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AB4B314BC for ; Tue, 10 Mar 2020 14:28:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 792E8227BF for ; Tue, 10 Mar 2020 14:28:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="SOUL5Su9" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726423AbgCJO2c (ORCPT ); Tue, 10 Mar 2020 10:28:32 -0400 Received: from mail-lj1-f195.google.com ([209.85.208.195]:40976 "EHLO mail-lj1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726998AbgCJO2b (ORCPT ); Tue, 10 Mar 2020 10:28:31 -0400 Received: by mail-lj1-f195.google.com with SMTP id o10so7630011ljc.8 for ; Tue, 10 Mar 2020 07:28:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=lAsP5U8BxMgKAVbQTJnMiEkPLjb5zTWpXQUEqm8GMa0=; b=SOUL5Su9oS3gH0f5Lxrab0rV2IGRMa1AnmhXJWj/yFo5XZeg/sOqwM9JtPdZ5ZAVZ0 7peSAd03h/2ThNljJF/w0troRG1qv3RlL8aiz5sFmMoYIJDW0dgNpUx+kZYMuprAxCj7 FGWoT8CBCB2VCNIrl4TxCz7SGC6IwqEpyo6Tof+R9cm5Vn46X2XrRyNVxk9dLBXtnB43 tinukKHZzYPvWsbKVySGFLRMiwJUODzJ7d35yBjnv01FQWrPOUxDmMlQJn9wXWoNSUwy VKQh4x0daD86oinnpqhqb3rhtfpPsd8XKQ21g4gz6o1PNd52mkJCWxsCR3vcfx4gcIPU HTFg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=lAsP5U8BxMgKAVbQTJnMiEkPLjb5zTWpXQUEqm8GMa0=; b=EUrqpcpLZVDFpCR7ibGOcOKGaywhy/2NpB1855Rpq8P5zJvN6j8sZAe3Ng8QN7rojs ANqMiBZ/u/K10aGVYTqNtqCb26SuQhY8gO28ci76JI20p3xY4mZ7BFR6UJixBP4v0l/3 v5X0yI6P1sztkvuxP5PenL13pN9dbE5Ow4W0kH2iSflAfV/W2vc11oYMwaKPCZ+hcM/2 wtc70/u6p4j/AjTIMwY4lG6qhq5QqhdxoGQ2Z/a8kEXMqs7SCeovFvlM6w2AWwG8AX9v eTD+z4YnWFcLCJLUDoHj97WMg0GJsxgr7VGN51gfYi1BDNLdFuUpNCdNtRutjjECJcn6 gv2Q== X-Gm-Message-State: ANhLgQ3ZgO+WlY/aOOj8yTqAm94jLUdn3yQEPYZS1YtFHVwMRbDrZdG6 W2mhuj6a/330vwabp1NkKFqaKQjRT/M= X-Google-Smtp-Source: ADFU+vvlDNcFNggYjQrT37PThpCmQFyOFgFYzlC2p0GyrlKGpF0vZAP8UZXQL5drVPe2KPRqaIJYyQ== X-Received: by 2002:a2e:9ad1:: with SMTP id p17mr13079538ljj.26.1583850509208; Tue, 10 Mar 2020 07:28:29 -0700 (PDT) Received: from localhost.bredbandsbolaget (c-5ac9225c.014-348-6c756e10.bbcust.telenor.se. [92.34.201.90]) by smtp.gmail.com with ESMTPSA id w24sm22794505ljh.26.2020.03.10.07.28.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Mar 2020 07:28:28 -0700 (PDT) From: Linus Walleij To: Dmitry Torokhov , linux-input@vger.kernel.org Cc: Linus Walleij , Ferruh Yigit , Henrik Rydberg Subject: [PATCH 2/2 v1] Input: cy8ctma140 - add driver Date: Tue, 10 Mar 2020 15:28:18 +0100 Message-Id: <20200310142818.15415-2-linus.walleij@linaro.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200310142818.15415-1-linus.walleij@linaro.org> References: <20200310142818.15415-1-linus.walleij@linaro.org> MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org This adds a new driver for the Cypress CY8CTMA140 touchscreen. This driver is inspired by out-of-tree code for the Samsung GT-S7710 mobile phone. I have tried to compare the structure and behaviour of this touchscreen to the existing CYTTSP and CYTTSP4 generics and it seems pretty different. It is also different in character from the cy8ctmg110_ts.c. It appears to rather be vaguely related to the Melfas MMS114 driver, yet distinctly different. Cc: Ferruh Yigit Cc: Henrik Rydberg Signed-off-by: Linus Walleij --- MAINTAINERS | 6 + drivers/input/touchscreen/Kconfig | 13 + drivers/input/touchscreen/Makefile | 1 + drivers/input/touchscreen/cy8ctma140.c | 380 +++++++++++++++++++++++++ 4 files changed, 400 insertions(+) create mode 100644 drivers/input/touchscreen/cy8ctma140.c diff --git a/MAINTAINERS b/MAINTAINERS index 8e7433d74530..39163de1a082 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4628,6 +4628,12 @@ T: git git://linuxtv.org/anttip/media_tree.git S: Maintained F: drivers/media/common/cypress_firmware* +CYPRESS CY8CTMA140 TOUCHSCREEN DRIVER +M: Linus Walleij +L: linux-input@vger.kernel.org +S: Maintained +F: drivers/input/touchscreen/cy8ctma140.c + CYTTSP TOUCHSCREEN DRIVER M: Ferruh Yigit L: linux-input@vger.kernel.org diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index c071f7c407b6..279b96d1761a 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -214,6 +214,19 @@ config TOUCHSCREEN_CY8CTMG110 To compile this driver as a module, choose M here: the module will be called cy8ctmg110_ts. +config TOUCHSCREEN_CY8CTMA140 + tristate "cy8ctma140 touchscreen" + depends on I2C + depends on GPIOLIB || COMPILE_TEST + help + Say Y here if you have a Cypress CY8CTMA140 capacitive + touchscreen also just known as "TMA140" + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called cy8ctma140. + config TOUCHSCREEN_CYTTSP_CORE tristate "Cypress TTSP touchscreen" help diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile index 94c6162409b3..006444c8f87b 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -23,6 +23,7 @@ obj-$(CONFIG_TOUCHSCREEN_BU21029) += bu21029_ts.o obj-$(CONFIG_TOUCHSCREEN_CHIPONE_ICN8318) += chipone_icn8318.o obj-$(CONFIG_TOUCHSCREEN_CHIPONE_ICN8505) += chipone_icn8505.o obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110) += cy8ctmg110_ts.o +obj-$(CONFIG_TOUCHSCREEN_CY8CTMA140) += cy8ctma140.o obj-$(CONFIG_TOUCHSCREEN_CYTTSP_CORE) += cyttsp_core.o obj-$(CONFIG_TOUCHSCREEN_CYTTSP_I2C) += cyttsp_i2c.o cyttsp_i2c_common.o obj-$(CONFIG_TOUCHSCREEN_CYTTSP_SPI) += cyttsp_spi.o diff --git a/drivers/input/touchscreen/cy8ctma140.c b/drivers/input/touchscreen/cy8ctma140.c new file mode 100644 index 000000000000..fb79f4251122 --- /dev/null +++ b/drivers/input/touchscreen/cy8ctma140.c @@ -0,0 +1,380 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Driver for Cypress CY8CTMA140 (TMA140) touchscreen + * (C) 2020 Linus Walleij + * (C) 2007 Cypress + * (C) 2007 Google, Inc. + * + * Inspired by the tma140_skomer.c driver in the Samsung GT-S7710 code + * drop. The GT-S7710 is codenamed "Skomer", the code also indicates + * that the same touchscreen was used in a product called "Lucas". + * + * The code drop for GT-S7710 also contains a firmware downloader and + * 15 (!) versions of the firmware drop from Cypress. But here we assume + * the firmware got downloaded to the touchscreen flash successfully and + * just use it to read the fingers. The shipped vendor driver does the + * same. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Used for driver name etc */ +#define CY8CTMA140_NAME "cy8ctma140" + +/* + * The datasheet claims the device supports 4 fingers but the firmware + * I've seen certainly only supports 2 fingers. + */ +#define CY8CTMA140_MAX_FINGERS 2 +#define CY8CTMA140_GET_FINGERS 0x00 +#define CY8CTMA140_GET_FW_INFO 0x19 + +struct cy8ctma140 { + struct input_dev *input; + struct touchscreen_properties props; + struct device *dev; + struct i2c_client *client; + struct regulator *vcpin; + struct regulator *vdd; + struct gpio_desc *irq; +}; + +static irqreturn_t cy8ctma140_irq_thread(int irq, void *d) +{ + struct cy8ctma140 *ts = d; + u8 msgbuf0[1]; + u8 buf[31]; + struct i2c_msg msg[2] = { + { + .addr = ts->client->addr, + .flags = 0, + .len = 1, + .buf = msgbuf0, + }, { + .addr = ts->client->addr, + .flags = I2C_M_RD, + .len = sizeof(buf), + .buf = buf, + }, + }; + u8 fingers; + u16 f1x, f1y, f1z; + u16 f2x, f2y, f2z; + int ret; + int slots[CY8CTMA140_MAX_FINGERS]; + struct input_mt_pos pos[CY8CTMA140_MAX_FINGERS]; + + msgbuf0[0] = CY8CTMA140_GET_FINGERS; + ret = __i2c_transfer(ts->client->adapter, msg, 2); + if (ret < 0) { + dev_err(ts->dev, "error reading message\n"); + goto evt_out; + } + if (ret != 2) { + dev_err(ts->dev, "wrong number of messages\n"); + goto evt_out; + } + if (buf[1] & 0x20) { + dev_info(ts->dev, "invalid event\n"); + goto evt_out; + } + + f1x = buf[3] << 8 | buf[4]; + f1y = buf[5] << 8 | buf[6]; + f1z = buf[7]; + + f2x = buf[9] << 8 | buf[10]; + f2y = buf[11] << 8 | buf[12]; + f2z = buf[13]; + + fingers = buf[2] & 0x0f; + if (fingers == 0) { + dev_info(ts->dev, "no fingers\n"); + goto evt_out; + } + + input_mt_assign_slots(ts->input, slots, pos, fingers, 0); + + /* + * When just handling two fingers this code is simple and we do not + * need a loop increasing the complexity. If you need to modify + * this driver for some firmware handling more than 2 fingers, + * this is where you put in an array of coordinated and a loop + * instead. + */ + if (fingers >= 1) { + dev_dbg(ts->dev, "%d fingers: finger 1 ID: %02x (%d, %d, %d)\n", + fingers, buf[8] >> 4, f1x, f1y, f1z); + input_mt_slot(ts->input, slots[0]); + input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true); + input_report_abs(ts->input, ABS_MT_POSITION_X, f1x); + input_report_abs(ts->input, ABS_MT_POSITION_Y, f1y); + input_report_abs(ts->input, ABS_MT_PRESSURE, f1z); + } + if (fingers >= 2) { + dev_dbg(ts->dev, "%d fingers: finger 2 ID %02x (%d, %d, %d)\n", + fingers, buf[8] & 0x0f, f2x, f2y, f2z); + input_mt_slot(ts->input, slots[1]); + input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true); + input_report_abs(ts->input, ABS_MT_POSITION_X, f2x); + input_report_abs(ts->input, ABS_MT_POSITION_Y, f2y); + input_report_abs(ts->input, ABS_MT_PRESSURE, f2z); + } + if (fingers > 2) + dev_err(ts->dev, "%d fingers - unsupported!\n", fingers); + + input_mt_sync_frame(ts->input); + input_sync(ts->input); + +evt_out: + return IRQ_HANDLED; +} + +static int cy8ctma140_init(struct cy8ctma140 *ts) +{ + u8 addr[1]; + u8 buf[5]; + int ret; + + addr[0] = CY8CTMA140_GET_FW_INFO; + ret = i2c_master_send(ts->client, addr, 1); + if (ret < 0) { + dev_err(ts->dev, "error sending FW info message\n"); + return ret; + } + ret = i2c_master_recv(ts->client, buf, 5); + if (ret < 0) { + dev_err(ts->dev, "error recieveing FW info message\n"); + return ret; + } + if (ret != 5) { + dev_err(ts->dev, "got only %d bytes\n", ret); + return -EIO; + } + + dev_info(ts->dev, "vendor %c%c, HW ID %.2d, FW ver %.4d\n", + buf[0], buf[1], buf[3], buf[4]); + return 0; +} + +static int cy8ctma140_power_up(struct cy8ctma140 *ts) +{ + int ret; + + ret = regulator_enable(ts->vcpin); + if (ret) { + dev_err(ts->dev, "failed to enable VCPIN voltage\n"); + return ret; + } + ret = regulator_enable(ts->vdd); + if (ret) { + dev_err(ts->dev, "failed to enable VDD voltage\n"); + regulator_disable(ts->vcpin); + return ret; + } + + msleep(250); + + return 0; +} + +static void cy8ctma140_power_down(struct cy8ctma140 *ts) +{ + regulator_disable(ts->vdd); + regulator_disable(ts->vcpin); +} + +/* Called from the registered devm action */ +static void cy8ctma140_power_off_action(void *d) +{ + struct cy8ctma140 *ts = d; + + cy8ctma140_power_down(ts); +} + +static int cy8ctma140_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct cy8ctma140 *ts; + struct input_dev *input; + struct device *dev = &client->dev; + int ret; + + ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL); + if (!ts) + return -ENOMEM; + + input = devm_input_allocate_device(dev); + if (!input) + return -ENOMEM; + + ts->dev = dev; + ts->client = client; + ts->input = input; + + /* + * This sets up event max/min capabilities and fuzz. + * Some DT properties are compulsory so we do not need + * to provide defaults for X/Y max or pressure max. + * + * We just initialize a very simple MT touchscreen here, + * some devices use the capability of this touchscreen to + * provide touchkeys, and in that case this needs to be + * extended to handle touchkey input. + * + * The firmware takes care of finger tracking and dropping + * invalid ranges. + */ + touchscreen_parse_properties(input, true, &ts->props); + + ret = input_mt_init_slots(input, CY8CTMA140_MAX_FINGERS, + INPUT_MT_DIRECT); + if (ret) + return ret; + + input->name = CY8CTMA140_NAME; + input->phys = "inpus/ts"; + input->id.bustype = BUS_I2C; + input_set_drvdata(input, ts); + + /* VCPIN is the analog voltage supply */ + ts->vcpin = devm_regulator_get(dev, "vcpin"); + if (IS_ERR(ts->vcpin)) { + if (PTR_ERR(ts->vcpin) != -EPROBE_DEFER) + dev_err(dev, "Failed to get VCPIN regulator %d\n", + (int)PTR_ERR(ts->vcpin)); + return PTR_ERR(ts->vcpin); + } + /* According to datasheet this should be in the 2.7-3.6 V range */ + ret = regulator_set_voltage(ts->vcpin, 2700000, 3600000); + if (ret) { + dev_err(dev, "failed to set VCPIN voltage\n"); + return ret; + } + + /* + * VDD is the digital voltage supply + * since the voltage range of VDD overlaps that of VCPIN, + * many designs to just supply both with a single voltage + * source of ~3.3 V. + */ + ts->vdd = devm_regulator_get(dev, "vdd"); + if (IS_ERR(ts->vdd)) { + if (PTR_ERR(ts->vdd) != -EPROBE_DEFER) + dev_err(dev, "Failed to get VDD regulator %d\n", + (int)PTR_ERR(ts->vdd)); + return PTR_ERR(ts->vdd); + } + /* According to datasheet this should be in the 1.71-3.6 V range */ + ret = regulator_set_voltage(ts->vdd, 2700000, 3600000); + if (ret) { + dev_err(dev, "failed to set VDD voltage\n"); + return ret; + } + + ret = cy8ctma140_power_up(ts); + if (ret) + return ret; + ret = devm_add_action_or_reset(dev, cy8ctma140_power_off_action, ts); + if (ret) { + dev_err(dev, "failed to install power off handler\n"); + return ret; + } + + ret = devm_request_threaded_irq(dev, client->irq, NULL, + cy8ctma140_irq_thread, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + CY8CTMA140_NAME, ts); + if (ret) { + dev_err(dev, "irq %d busy? error %d\n", client->irq, ret); + goto err_reg_dis; + } + + ret = cy8ctma140_init(ts); + if (ret) + return ret; + + ret = input_register_device(input); + if (ret) + goto err_reg_dis; + + i2c_set_clientdata(client, ts); + + device_init_wakeup(dev, 1); + return 0; + +err_reg_dis: + cy8ctma140_power_down(ts); + return ret; +} + +static int __maybe_unused cy8ctma140_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct cy8ctma140 *ts = i2c_get_clientdata(client); + + if (device_may_wakeup(&client->dev)) + enable_irq_wake(client->irq); + else + cy8ctma140_power_down(ts); + + return 0; +} + +static int __maybe_unused cy8ctma140_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct cy8ctma140 *ts = i2c_get_clientdata(client); + int ret; + + if (device_may_wakeup(&client->dev)) { + disable_irq_wake(client->irq); + } else { + ret = cy8ctma140_power_up(ts); + if (ret) + return ret; + } + + return 0; +} + +static SIMPLE_DEV_PM_OPS(cy8ctma140_pm, cy8ctma140_suspend, cy8ctma140_resume); + +static const struct i2c_device_id cy8ctma140_idtable[] = { + { CY8CTMA140_NAME, 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, cy8ctma140_idtable); + +static const struct of_device_id cy8ctma140_of_match[] = { + { + .compatible = "cypress,cy8ctma140", + }, +}; +MODULE_DEVICE_TABLE(of, cy8ctma140_of_match); + +static struct i2c_driver cy8ctma140_driver = { + .driver = { + .name = CY8CTMA140_NAME, + .pm = &cy8ctma140_pm, + .of_match_table = cy8ctma140_of_match, + }, + .id_table = cy8ctma140_idtable, + .probe = cy8ctma140_probe, +}; +module_i2c_driver(cy8ctma140_driver); + +MODULE_AUTHOR("Linus Walleij "); +MODULE_DESCRIPTION("CY8CTMA140 TouchScreen Driver"); +MODULE_LICENSE("GPL v2");