From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay1-d.mail.gandi.net (relay1-d.mail.gandi.net [217.70.183.193]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 89C8726AEA; Fri, 19 Apr 2024 12:32:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.193 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713529933; cv=none; b=X1JhBaRQtJEm7WOgjqFj1SZe+M7aQ32/0DddFEQojCpBX60YfCQHdPTQ19l6pF+Omf4Lw0dUiyt8PIAILCEdZ8+vxE+JlT5NqpX1rmpjTV3Z0bt4mYIinAclrx4SqMKPeIObMHYatIREbwWBn1Cp3jbHzPGxFQ1oF/idEUzos0I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713529933; c=relaxed/simple; bh=3AzwhE+TfEaJsKkyPQyPTfbS94T+02B1ohudxzLWRrw=; h=MIME-Version:Date:From:To:Cc:Subject:In-Reply-To:References: Message-ID:Content-Type; b=YHGo2xjIsQ3Ma3uR+K1Aq3hL90llVzD2Yijm8RXCyY/u5NcXrBIibUMkPOJ2DpKXaRtEReShaVP6GEo5nkxLXAsw2pB52+1QQBEwaNwa/ZDL46w7b4LOe+i51I80IK8F4H6znG1u/XAxpwAdGlvhSK4rBEybFowz4plN0O8aZoE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=d2QaD1pd; arc=none smtp.client-ip=217.70.183.193 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="d2QaD1pd" Received: by mail.gandi.net (Postfix) with ESMTPA id 25CE724000A; Fri, 19 Apr 2024 12:32:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1713529925; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=C6d3tTy7nNpSviXcLFyngRXqJU495b7dun3cZY3B0WM=; b=d2QaD1pd5WYh1RzLMKBaNDo01L9q6G87oxDVi5pvPaJg15G18evCDq7+0V8OgSlN5a8rsV +mubcBrbv9YslHyUd27VB8WEGMmJCPuyem2bMUbrSdZdyjZ3dD7vuXbDtt3WSE9801JTnW hJJp19k6KB1vddt7H6XjCSTFqpJLenKUC/q/T6ZNndKrCo6Aa+Si14OnEGWn4pRppc0W7C i+R0rIZCgot/1mEn7nPhPQATsKR6d8FWW+2KdtGZoDAsUikQ1dkQau90bsQg8irIfVscLf RYE3Cmg5zcGxkvEoq7YGrPOCHEYOzrW6LlClbtXq+Q1XLiRpDWPygkZiNRw+9Q== Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Fri, 19 Apr 2024 14:32:04 +0200 From: Kamel BOUHARA To: Marco Felsch Cc: Dmitry Torokhov , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Henrik Rydberg , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Jeff LaBundy , catalin.popescu@leica-geosystems.com, mark.satterthwaite@touchnetix.com, Thomas Petazzoni , Gregory Clement , bsp-development.geo@leica-geosystems.com Subject: Re: [PATCH v10 3/3] Input: Add TouchNetix axiom i2c touchscreen driver In-Reply-To: <20240419092826.2gq72etn4fh4q7ph@pengutronix.de> References: <20240419083342.61199-1-kamel.bouhara@bootlin.com> <20240419083342.61199-4-kamel.bouhara@bootlin.com> <20240419092826.2gq72etn4fh4q7ph@pengutronix.de> Message-ID: X-Sender: kamel.bouhara@bootlin.com Organization: Bootlin Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-GND-Sasl: kamel.bouhara@bootlin.com Le 2024-04-19 11:28, Marco Felsch a écrit : > Hi Kamel, > Hi, > thank you for the patch. Again just a rough review. > > On 24-04-19, Kamel Bouhara wrote: >> Add a new driver for the TouchNetix's axiom family of >> touchscreen controllers. This driver only supports i2c >> and can be later adapted for SPI and USB support. >> >> Signed-off-by: Kamel Bouhara >> --- > > ... > >> +static int axiom_i2c_probe(struct i2c_client *client) >> +{ >> + struct device *dev = &client->dev; >> + struct input_dev *input_dev; >> + struct axiom_data *ts; >> + u32 poll_interval; >> + int target; >> + int error; >> + >> + ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL); >> + if (!ts) >> + return -ENOMEM; >> + >> + i2c_set_clientdata(client, ts); >> + ts->client = client; >> + ts->dev = dev; >> + >> + ts->regmap = devm_regmap_init_i2c(client, &axiom_i2c_regmap_config); >> + error = PTR_ERR_OR_ZERO(ts->regmap); >> + if (error) { >> + dev_err(dev, "Failed to initialize regmap: %d\n", error); >> + return error; >> + } >> + >> + ts->vddi = devm_regulator_get(dev, "VDDI"); > > This does not match the dt-bindings. > >> + if (IS_ERR(ts->vddi)) >> + return dev_err_probe(&client->dev, PTR_ERR(ts->vddi), >> + "Failed to enable VDDI regulator\n"); >> + >> + ts->vdda = devm_regulator_get(dev, "VDDA"); > > Here as well. > >> + if (IS_ERR(ts->vdda)) >> + return dev_err_probe(&client->dev, PTR_ERR(ts->vdda), >> + "Failed to enable VDDA regulator\n"); > > Now we handle it as always but.. > >> + ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", >> GPIOD_OUT_HIGH); >> + if (IS_ERR(ts->reset_gpio)) >> + return dev_err_probe(dev, PTR_ERR(ts->reset_gpio), "failed to get >> reset GPIO\n"); >> + >> + if (ts->reset_gpio) >> + axiom_reset(ts->reset_gpio); >> + else >> + msleep(AXIOM_STARTUP_TIME_MS); > > still the reset is useless since you never enabled the regulators. So > either use devm_regulator_get_enable() or you do the enable/disable > separate via regulator_enable()/disable(). If there are no strict > enablement restrictions like orders and timings you could also make use > of the regulator_bulk API (e.g. devm_regulator_bulk_get_enable). I will just go with the devm_regulator_get_enable() solution in v11, regulator have to be enabled before reset is asserted here. Thanks again! Kamel > > Regards, > Marco > >> + >> + error = axiom_discover(ts); >> + if (error) >> + return dev_err_probe(dev, error, "Failed touchscreen discover\n"); >> + >> + input_dev = devm_input_allocate_device(ts->dev); >> + if (!input_dev) >> + return -ENOMEM; >> + >> + input_dev->name = "TouchNetix axiom Touchscreen"; >> + input_dev->phys = "input/axiom_ts"; >> + >> + input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, 65535, 0, 0); >> + input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, 65535, 0, 0); >> + input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE, 0, MT_TOOL_MAX, 0, >> 0); >> + input_set_abs_params(input_dev, ABS_MT_DISTANCE, 0, 127, 0, 0); >> + input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 127, 0, 0); >> + >> + touchscreen_parse_properties(input_dev, true, &ts->prop); >> + >> + /* Registers the axiom device as a touchscreen instead of a mouse >> pointer */ >> + error = input_mt_init_slots(input_dev, AXIOM_U41_MAX_TARGETS, >> INPUT_MT_DIRECT); >> + if (error) >> + return error; >> + >> + /* Enables the raw data for up to 4 force channels to be sent to the >> input subsystem */ >> + set_bit(EV_REL, input_dev->evbit); >> + set_bit(EV_MSC, input_dev->evbit); >> + /* Declare that we support "RAW" Miscellaneous events */ >> + set_bit(MSC_RAW, input_dev->mscbit); >> + >> + ts->input_dev = input_dev; >> + input_set_drvdata(ts->input_dev, ts); >> + >> + /* Ensure that all reports are initialised to not be present. */ >> + for (target = 0; target < AXIOM_U41_MAX_TARGETS; target++) >> + ts->targets[target].state = AXIOM_TARGET_STATE_NOT_PRESENT; >> + >> + error = devm_request_threaded_irq(dev, client->irq, NULL, >> + axiom_irq, IRQF_ONESHOT, dev_name(dev), ts); >> + if (error) { >> + dev_info(dev, "Request irq failed, falling back to polling mode"); >> + >> + error = input_setup_polling(input_dev, axiom_i2c_poll); >> + if (error) >> + return dev_err_probe(ts->dev, error, "Unable to set up polling >> mode\n"); >> + >> + if (!device_property_read_u32(ts->dev, "poll-interval", >> &poll_interval)) >> + input_set_poll_interval(input_dev, poll_interval); >> + else >> + input_set_poll_interval(input_dev, POLL_INTERVAL_DEFAULT_MS); >> + } >> + >> + return input_register_device(input_dev); >> +} >> + >> +static const struct i2c_device_id axiom_i2c_id_table[] = { >> + { "ax54a" }, >> + { }, >> +}; >> +MODULE_DEVICE_TABLE(i2c, axiom_i2c_id_table); >> + >> +static const struct of_device_id axiom_i2c_of_match[] = { >> + { .compatible = "touchnetix,ax54a", }, >> + { } >> +}; >> +MODULE_DEVICE_TABLE(of, axiom_i2c_of_match); >> + >> +static struct i2c_driver axiom_i2c_driver = { >> + .driver = { >> + .name = "axiom", >> + .of_match_table = axiom_i2c_of_match, >> + }, >> + .id_table = axiom_i2c_id_table, >> + .probe = axiom_i2c_probe, >> +}; >> +module_i2c_driver(axiom_i2c_driver); >> + >> +MODULE_AUTHOR("Bart Prescott "); >> +MODULE_AUTHOR("Pedro Torruella "); >> +MODULE_AUTHOR("Mark Satterthwaite >> "); >> +MODULE_AUTHOR("Hannah Rossiter "); >> +MODULE_AUTHOR("Kamel Bouhara "); >> +MODULE_DESCRIPTION("TouchNetix axiom touchscreen I2C bus driver"); >> +MODULE_LICENSE("GPL"); >> -- >> 2.25.1 >> >> -- -- Kamel Bouhara, Bootlin Embedded Linux and kernel engineering https://bootlin.com