From patchwork Wed May 4 15:24:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Markuss Broks X-Patchwork-Id: 569394 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1BE72C4167D for ; Wed, 4 May 2022 15:24:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352324AbiEDP22 (ORCPT ); Wed, 4 May 2022 11:28:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53204 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352299AbiEDP20 (ORCPT ); Wed, 4 May 2022 11:28:26 -0400 Received: from mail-wm1-x32d.google.com (mail-wm1-x32d.google.com [IPv6:2a00:1450:4864:20::32d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 75E4E4474B; Wed, 4 May 2022 08:24:49 -0700 (PDT) Received: by mail-wm1-x32d.google.com with SMTP id a14-20020a7bc1ce000000b00393fb52a386so3446159wmj.1; Wed, 04 May 2022 08:24:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=S0+dOonjyXB+u/RPDdGeIJKQE4fMwvUsn4WlnEiMshU=; b=YY9vBebDEgCZNjAmaLhjdYzaTqnAHEGlxSJawmMGqbg4pKN4YjtYcHCjw9OGiyf/ye vzqWImpXfFCqll276rqhRwlIiIwLSGTUBHEAhdvuq5ZkiQjBPZBXwxVJndESB6fcuBKY vohnEeNggv73lCZjTOpgdXdyn++4g8Sw1mbv8rhS8oeOPOaTHlaDOsDKPL3JQUg0CNj1 ktyCdYJJdzbw+nipTopjOCLDR3cShnhLL+ZpU+/SyJUUEyqrYsG4W+Cztfaso9JytgS1 q/O0Eilz3fkUYNUYYslcm08o9f7gZA1vzw95zwYIZZeUhVa1rQtPXGOHAt64SXzIL8sf pj1w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=S0+dOonjyXB+u/RPDdGeIJKQE4fMwvUsn4WlnEiMshU=; b=WQgEPhrfRUqKrxg1u0pnuOH3QraeWR7YJHQzRn7osB8CY814y+rQvro+y4jsdVefGk +huisbL4JDtWG/74p59Uj4UjAUez1EcAfR0wgNKaZwlf3FQ5RzKMCQlVUnvWS7wjbK8R 92oktnSdnNzj9i+19qSpSj7dJX5Jpy/hGQ9MPwi5gBHZHTt10zDbyA5gTDMC6vxRijBk GRaEQO0/rV72uecxT08ikpVeAjOtQS8x84yIM7DcKXjcjXll1X/UkzDQRoDqk3M0Ti2D 0pT5tj3596sNUK7hfdWPAOg2H9QzoCOREHd2NqpOlLipMsmK8z30b705h0CsJ9xxvxq+ XEVw== X-Gm-Message-State: AOAM53059HknQzupbFZT/EEKV3XsdnxUe2KNNzBvg8OoPMQ41TL+0k3D ESJbjdvbSKhyJxt1wnugEDmKjc9ck00= X-Google-Smtp-Source: ABdhPJxuCA0jS5OuPVXnnGgLs8Hy3fEvmxK8UOE0o/zR+PYdbBt5zeS6/NiNrBZ7/rymeQnCRK/sZA== X-Received: by 2002:a05:600c:1f0d:b0:394:23f0:4530 with SMTP id bd13-20020a05600c1f0d00b0039423f04530mr18326wmb.30.1651677887892; Wed, 04 May 2022 08:24:47 -0700 (PDT) Received: from nergzd-desktop.localdomain ([194.39.226.133]) by smtp.gmail.com with ESMTPSA id s14-20020adfa28e000000b0020c5253d91csm11541041wra.104.2022.05.04.08.24.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 May 2022 08:24:47 -0700 (PDT) From: Markuss Broks To: linux-kernel@vger.kernel.org Cc: phone-devel@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht, Markuss Broks , Lin Meng-Bo , Dmitry Torokhov , Rob Herring , Krzysztof Kozlowski , Henrik Rydberg , linux-input@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH 3/3] input/touchscreen: imagis: Add support for Imagis IST3038B Date: Wed, 4 May 2022 18:24:05 +0300 Message-Id: <20220504152406.8730-4-markuss.broks@gmail.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220504152406.8730-1-markuss.broks@gmail.com> References: <20220504152406.8730-1-markuss.broks@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Imagis IST3038B is another variant of Imagis IST3038 IC, which has a different register interface from IST3038C (possibly firmware defined). This should also work for IST3044B (though untested), however other variants using this interface/protocol(IST3026, IST3032, IST3026B, IST3032B) have a different format for coordinates, and they'd need additional effort to be supported by this driver. Signed-off-by: Markuss Broks --- drivers/input/touchscreen/imagis.c | 58 ++++++++++++++++++++++++------ 1 file changed, 47 insertions(+), 11 deletions(-) diff --git a/drivers/input/touchscreen/imagis.c b/drivers/input/touchscreen/imagis.c index b667914a44f1..57bb8f31ac1f 100644 --- a/drivers/input/touchscreen/imagis.c +++ b/drivers/input/touchscreen/imagis.c @@ -13,7 +13,7 @@ #define IST3038C_HIB_ACCESS (0x800B << 16) #define IST3038C_DIRECT_ACCESS BIT(31) -#define IST3038C_REG_CHIPID 0x40001000 +#define IST3038C_REG_CHIPID (0x40001000 | IST3038C_DIRECT_ACCESS) #define IST3038C_REG_HIB_BASE 0x30000100 #define IST3038C_REG_TOUCH_STATUS (IST3038C_REG_HIB_BASE | IST3038C_HIB_ACCESS) #define IST3038C_REG_TOUCH_COORD (IST3038C_REG_HIB_BASE | IST3038C_HIB_ACCESS | 0x8) @@ -31,8 +31,21 @@ #define IST3038C_FINGER_COUNT_SHIFT 12 #define IST3038C_FINGER_STATUS_MASK GENMASK(9, 0) +#define IST3038B_REG_STATUS 0x20 +#define IST3038B_REG_CHIPID 0x30 +#define IST3038B_WHOAMI 0x30380b + +struct imagis_properties { + unsigned int interrupt_msg_cmd; + unsigned int touch_coord_cmd; + unsigned int whoami_cmd; + unsigned int whoami_val; + bool protocol_b; +}; + struct imagis_ts { struct i2c_client *client; + const struct imagis_properties *tdata; struct input_dev *input_dev; struct touchscreen_properties prop; struct regulator_bulk_data supplies[2]; @@ -84,8 +97,7 @@ static irqreturn_t imagis_interrupt(int irq, void *dev_id) int i; int error; - error = imagis_i2c_read_reg(ts, IST3038C_REG_INTR_MESSAGE, - &intr_message); + error = imagis_i2c_read_reg(ts, ts->tdata->interrupt_msg_cmd, &intr_message); if (error) { dev_err(&ts->client->dev, "failed to read the interrupt message: %d\n", error); @@ -104,9 +116,13 @@ static irqreturn_t imagis_interrupt(int irq, void *dev_id) finger_pressed = intr_message & IST3038C_FINGER_STATUS_MASK; for (i = 0; i < finger_count; i++) { - error = imagis_i2c_read_reg(ts, - IST3038C_REG_TOUCH_COORD + (i * 4), - &finger_status); + if (ts->tdata->protocol_b) + error = imagis_i2c_read_reg(ts, + ts->tdata->touch_coord_cmd, &finger_status); + else + error = imagis_i2c_read_reg(ts, + ts->tdata->touch_coord_cmd + (i * 4), + &finger_status); if (error) { dev_err(&ts->client->dev, "failed to read coordinates for finger %d: %d\n", @@ -261,6 +277,12 @@ static int imagis_probe(struct i2c_client *i2c) ts->client = i2c; + ts->tdata = device_get_match_data(dev); + if (!ts->tdata) { + dev_err(dev, "missing chip data\n"); + return -EINVAL; + } + error = imagis_init_regulators(ts); if (error) { dev_err(dev, "regulator init error: %d\n", error); @@ -279,15 +301,13 @@ static int imagis_probe(struct i2c_client *i2c) return error; } - error = imagis_i2c_read_reg(ts, - IST3038C_REG_CHIPID | IST3038C_DIRECT_ACCESS, - &chip_id); + error = imagis_i2c_read_reg(ts, ts->tdata->whoami_cmd, &chip_id); if (error) { dev_err(dev, "chip ID read failure: %d\n", error); return error; } - if (chip_id != IST3038C_WHOAMI) { + if (chip_id != ts->tdata->whoami_val) { dev_err(dev, "unknown chip ID: 0x%x\n", chip_id); return -EINVAL; } @@ -343,9 +363,25 @@ static int __maybe_unused imagis_resume(struct device *dev) static SIMPLE_DEV_PM_OPS(imagis_pm_ops, imagis_suspend, imagis_resume); +static const struct imagis_properties imagis_3038b_data = { + .interrupt_msg_cmd = IST3038B_REG_STATUS, + .touch_coord_cmd = IST3038B_REG_STATUS, + .whoami_cmd = IST3038B_REG_CHIPID, + .whoami_val = IST3038B_WHOAMI, + .protocol_b = true, +}; + +static const struct imagis_properties imagis_3038c_data = { + .interrupt_msg_cmd = IST3038C_REG_INTR_MESSAGE, + .touch_coord_cmd = IST3038C_REG_TOUCH_COORD, + .whoami_cmd = IST3038C_REG_CHIPID, + .whoami_val = IST3038C_WHOAMI, +}; + #ifdef CONFIG_OF static const struct of_device_id imagis_of_match[] = { - { .compatible = "imagis,ist3038c", }, + { .compatible = "imagis,ist3038b", .data = &imagis_3038b_data }, + { .compatible = "imagis,ist3038c", .data = &imagis_3038c_data }, { }, }; MODULE_DEVICE_TABLE(of, imagis_of_match);