From patchwork Sat Jul 15 09:18:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maksim Kiselev X-Patchwork-Id: 13314436 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 00AE6C001B0 for ; Sat, 15 Jul 2023 09:18:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=jd3D/Yo/nQWqo0OakRRmTDkr0bsAaqvjE+aeGczbIg4=; b=1hZpRrKeIEy4+O 1i7HHUG9f/DVZF5KhbNY9yKOxD5PRyyc3/AFoNSrzmNyCAuPHwO7JKwTQ5FGmVd9xBLHw62bW6rOR Ull605fYa3bq/HZVb+Ziat7Ap9cTdTF2426+PL6pKNt/xHngvmlrwpzrVwkrLtpmfx+Kc2zHiV0mX uRtJFqsZCv32ludwJ1wgpjT2Eb/RMDRPYJQDzEudjR5iXP2zf1oJrndVtw98nr5RSHiT4D1napEIe OSkIIOLoTi5SkJB1qqVgeYLXF85I3bWG/Rp9XDq2RNFVgg34RVg4p7PzA3RrNB62clqCuLmVltUtj y/pDeZfUyncgZuGYDn7g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qKbQK-008Gmp-2X; Sat, 15 Jul 2023 09:18:44 +0000 Received: from mail-lj1-x236.google.com ([2a00:1450:4864:20::236]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qKbQD-008Gjs-2V; Sat, 15 Jul 2023 09:18:38 +0000 Received: by mail-lj1-x236.google.com with SMTP id 38308e7fff4ca-2b6fdaf6eefso41668851fa.0; Sat, 15 Jul 2023 02:18:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1689412712; x=1692004712; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Ml0O9v4adwaXBJEIaQ084479cQpZdd+qXOYWMXt4ElA=; b=XXh3zvoVnJjyw+Vw1oB7KtQZbYBRIaUkMaa2x991IFW0s/OZ/kSSYGNrCDOxKTKYSS ZL8VA1Eu8gzIpmqN46PkaZpKdMzSsNwWOOYDfbN2WMv5nLEcrIJZPdhk5Apgva7LqSvX Mep8qlq7D+CRYNI+eWLfM1wLJIyhu41m9AnwXuNl0sjNWTtoCDbXVO1Eeii8QIXK+4FO v+TMjRBVlMlfwrL8USiNrcmwZcVnsFD12XaaKAARJlULo4cqpaYlLtUmKaK2d6Nkekka Uc7865qWaLXql6ZXEjTwVN+E0gH+luOuNY6Nur8QLI1EoasrBJax258VzZHzgw+gi8Vw N3cw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689412712; x=1692004712; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Ml0O9v4adwaXBJEIaQ084479cQpZdd+qXOYWMXt4ElA=; b=P9LjzFFSZz2Sb73T28Yp80072DGZeqVUm9cBBEZcyXWl/XiqYpGVGO6iVJiC6q+rZN mynPZzKmL4v9gPjmjZtcAVKC2O3xZ1YVbHpZulSaJCHF3BWS9pufIrzReZVS77HmbDDA +HsfXc7jz5wdxZuAHRQjhSLoStn87zuvDDVWahFSZr6FFZsLvLazuz0NAAxfylOkUTby BZm4DlUPjbNRbiFtYxen0CMgzR4MV2UI8/JVFjzL+AwKGM+2hn0fhrM80XSPmN/71sZB fwWfVyO2qyta48MxI+R8LdIEs+477w/aPfnv5IU2EWrmJ5//H8ZpceTEmRkgyoJu2cf1 m7/w== X-Gm-Message-State: ABy/qLbQY82vnFr71Nl0MnGB5aQmioknCm6h0TtnvRMZWnG75DxjJnxF XT5EVABB8xQ1d0dJR/G+kRM= X-Google-Smtp-Source: APBJJlH2MjuUkNhIv3D5y271CR9dnERIGeG6VJrEdFCX/0Z5fkvnvbXOAyVQ9MxF3mJap1rTA1eULA== X-Received: by 2002:a2e:9bcb:0:b0:2b6:dec9:2813 with SMTP id w11-20020a2e9bcb000000b002b6dec92813mr5993004ljj.29.1689412712645; Sat, 15 Jul 2023 02:18:32 -0700 (PDT) Received: from user-PC.. ([92.51.95.194]) by smtp.gmail.com with ESMTPSA id b17-20020a2e9891000000b002b840f283a7sm561784ljj.36.2023.07.15.02.18.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 15 Jul 2023 02:18:32 -0700 (PDT) From: Maksim Kiselev To: linux-iio@vger.kernel.org Cc: Maksim Kiselev , Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Paul Walmsley , Palmer Dabbelt , Albert Ou , Philipp Zabel , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: [PATCH v9 1/4] iio: adc: Kconfig change description for Allwinner GPADC Date: Sat, 15 Jul 2023 12:18:13 +0300 Message-Id: <20230715091816.3074375-2-bigunclemax@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230715091816.3074375-1-bigunclemax@gmail.com> References: <20230715091816.3074375-1-bigunclemax@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230715_021837_812744_3D3DF628 X-CRM114-Status: GOOD ( 10.93 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add SoCs names to Allwinner GPADC description to make it more informative. Signed-off-by: Maksim Kiselev --- drivers/iio/adc/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index dc14bde31ac1..5f1e9bb59623 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -1116,7 +1116,7 @@ config STMPE_ADC built-in ADC block (stmpe811). config SUN4I_GPADC - tristate "Support for the Allwinner SoCs GPADC" + tristate "Allwinner A10/A13/A31 and similar GPADCs driver" depends on IIO depends on MFD_SUN4I_GPADC || MACH_SUN8I depends on THERMAL || !THERMAL_OF From patchwork Sat Jul 15 09:18:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maksim Kiselev X-Patchwork-Id: 13314437 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8E552EB64DC for ; Sat, 15 Jul 2023 09:18:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=YiXUX6Pxuw00nc31I6ocPJb8XGcWUmEAnoX3fNnEjrU=; b=HjVQUDVGT82r9r G+UJ63ZHPCsEdLOJ7mBaeVQi3rywEz9bwcDdqHELMSz5/2sIADG+FTkwPlspsci55g3Kcx9e2nz9q PSkCPwbNDQwJnAhI/sAVA6c5vMUU7RKY4MrqjjUk4hAgrwRq/TOetqfX8MGviUfrqeOLo2SzFNa1B uHMoDmhMxxndgvyozEge+64zotxINL2I1d+ZFaegbNVvfg+NoPJ62bFjrnhxX0eeOf/XnvkoGapHq h6y9wzk68LiQInqDjCqM3VzKvV94mlIuMXxdmfxisXdrzzBu02qDFNF5zOiyYaU5ea8sHWAzVaRQ/ hV/2zexgIbzS8tq/1lBw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qKbQP-008God-2b; Sat, 15 Jul 2023 09:18:49 +0000 Received: from mail-lf1-x129.google.com ([2a00:1450:4864:20::129]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qKbQF-008GkF-1U; Sat, 15 Jul 2023 09:18:41 +0000 Received: by mail-lf1-x129.google.com with SMTP id 2adb3069b0e04-4fd32e611e0so1214296e87.0; Sat, 15 Jul 2023 02:18:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1689412716; x=1692004716; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=2jpNcy5dzVr82WuwEI1g6e6LWpPQ71PlmEmq2Gp7ysQ=; b=FkrTMK4ZjasfdQgtBLBDHgGJNMKGHsRES5JqlR0IMfxoe92LVbbOjattnX863XUh9c bjLWjl7HT9donsk+Eu9tqk+NLkemP9/A59eN+CIX0JYJgyje0kqxC0VMOT4W5M4DP1bj E+ktIUlFw+IZ5wzo0lpulklsy/6RmpHi+FqMUBFMEQFwuqUhkAmLq7Rm4jh9DIrL+46F 2rr/UU/uszsuqS/91McgHXJsw4u8XwMy80CeCmV1ktU8Yyz/3smG7R6pkuYRq3epGrlh ur7nJ4wHkobftHMP8Wak987jBvsYNZH2RRO62htKh8mUW9IWzEYCCHhNXtjtf5rYmbWz OqYQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689412716; x=1692004716; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=2jpNcy5dzVr82WuwEI1g6e6LWpPQ71PlmEmq2Gp7ysQ=; b=bl1MD3JcPrnzOgA6yZXiz4spP6hi4e9QNpELhYB8mHrq3vcgylnB8l4IFOAikAqqhz mKZG5Jaw7vwRBn7g/G7Ll5mSPYcXuEFxwBiuQdbamFWtZ1svYb7CLPU0jJHiCjEafV5x SokKwkqheatNDPnubRTsRvjENokquR7kM9DlwsvT7ztY5wguWlq4a2JizHVC+Z/Bhjt+ VCQV/UYub/i9j3JVoFDq45CV6Yvegzksi6t1mFt/bPRsTyyu4mjbqcTiNeOFKqRUunYB XQHJ5HY6PQZLuQAtk0utN7r8RlPRVqokc4+bOefs8TLa/hPhiF01SmiDLwnzg98EoJmf 4f+A== X-Gm-Message-State: ABy/qLbziYOD+XkqQWqDJU4W4VUAMwfSIceM9oKm8ktqhQqc9xJLy5Ct NwlCPCGa0bkgSGifmQcmUvI= X-Google-Smtp-Source: APBJJlFjlUwnRMcZk9RS4RINzx0js72EB9SAFazIwlHCMfh4PJY95mokGJzrnPxqR6PAglTw7wj1Dw== X-Received: by 2002:a05:6512:3a96:b0:4f8:6e50:d6d0 with SMTP id q22-20020a0565123a9600b004f86e50d6d0mr1787894lfu.31.1689412716242; Sat, 15 Jul 2023 02:18:36 -0700 (PDT) Received: from user-PC.. ([92.51.95.194]) by smtp.gmail.com with ESMTPSA id b17-20020a2e9891000000b002b840f283a7sm561784ljj.36.2023.07.15.02.18.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 15 Jul 2023 02:18:35 -0700 (PDT) From: Maksim Kiselev To: linux-iio@vger.kernel.org Cc: Maksim Kiselev , Andy Shevchenko , Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Paul Walmsley , Palmer Dabbelt , Albert Ou , Philipp Zabel , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: [PATCH v9 2/4] iio: adc: Add Allwinner D1/T113s/R329/T507 SoCs GPADC Date: Sat, 15 Jul 2023 12:18:14 +0300 Message-Id: <20230715091816.3074375-3-bigunclemax@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230715091816.3074375-1-bigunclemax@gmail.com> References: <20230715091816.3074375-1-bigunclemax@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230715_021839_499264_3384B9AD X-CRM114-Status: GOOD ( 29.75 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org The General Purpose ADC (GPADC) can convert the external signal into a certain proportion of digital value, to realize the measurement of analog signal, which can be applied to power detection and key detection. Theoretically, this ADC can support up to 16 channels. All SoCs below contain this GPADC IP. The only difference between them is the number of available channels: T113 - 1 channel D1 - 2 channels R329 - 4 channels T507 - 4 channels Reviewed-by: Andy Shevchenko Signed-off-by: Maksim Kiselev --- drivers/iio/adc/Kconfig | 10 ++ drivers/iio/adc/Makefile | 1 + drivers/iio/adc/sun20i-gpadc-iio.c | 276 +++++++++++++++++++++++++++++ 3 files changed, 287 insertions(+) create mode 100644 drivers/iio/adc/sun20i-gpadc-iio.c diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 5f1e9bb59623..517b3db114b8 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -1134,6 +1134,16 @@ config SUN4I_GPADC To compile this driver as a module, choose M here: the module will be called sun4i-gpadc-iio. +config SUN20I_GPADC + tristate "Allwinner D1/T113s/T507/R329 and similar GPADCs driver" + depends on ARCH_SUNXI || COMPILE_TEST + help + Say yes here to build support for Allwinner (D1, T113, T507 and R329) + SoCs GPADC. This ADC provides up to 16 channels. + + To compile this driver as a module, choose M here: the module will be + called sun20i-gpadc-iio. + config TI_ADC081C tristate "Texas Instruments ADC081C/ADC101C/ADC121C family" depends on I2C diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile index eb6e891790fb..2facf979327d 100644 --- a/drivers/iio/adc/Makefile +++ b/drivers/iio/adc/Makefile @@ -96,6 +96,7 @@ obj-$(CONFIG_RZG2L_ADC) += rzg2l_adc.o obj-$(CONFIG_SC27XX_ADC) += sc27xx_adc.o obj-$(CONFIG_SPEAR_ADC) += spear_adc.o obj-$(CONFIG_SUN4I_GPADC) += sun4i-gpadc-iio.o +obj-$(CONFIG_SUN20I_GPADC) += sun20i-gpadc-iio.o obj-$(CONFIG_STM32_ADC_CORE) += stm32-adc-core.o obj-$(CONFIG_STM32_ADC) += stm32-adc.o obj-$(CONFIG_STM32_DFSDM_CORE) += stm32-dfsdm-core.o diff --git a/drivers/iio/adc/sun20i-gpadc-iio.c b/drivers/iio/adc/sun20i-gpadc-iio.c new file mode 100644 index 000000000000..6a893d484cf7 --- /dev/null +++ b/drivers/iio/adc/sun20i-gpadc-iio.c @@ -0,0 +1,276 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * GPADC driver for sunxi platforms (D1, T113-S3 and R329) + * Copyright (c) 2023 Maksim Kiselev + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define SUN20I_GPADC_DRIVER_NAME "sun20i-gpadc" + +/* Register map definition */ +#define SUN20I_GPADC_SR 0x00 +#define SUN20I_GPADC_CTRL 0x04 +#define SUN20I_GPADC_CS_EN 0x08 +#define SUN20I_GPADC_FIFO_INTC 0x0c +#define SUN20I_GPADC_FIFO_INTS 0x10 +#define SUN20I_GPADC_FIFO_DATA 0X14 +#define SUN20I_GPADC_CB_DATA 0X18 +#define SUN20I_GPADC_DATAL_INTC 0x20 +#define SUN20I_GPADC_DATAH_INTC 0x24 +#define SUN20I_GPADC_DATA_INTC 0x28 +#define SUN20I_GPADC_DATAL_INTS 0x30 +#define SUN20I_GPADC_DATAH_INTS 0x34 +#define SUN20I_GPADC_DATA_INTS 0x38 +#define SUN20I_GPADC_CH_CMP_DATA(x) (0x40 + (x) * 4) +#define SUN20I_GPADC_CH_DATA(x) (0x80 + (x) * 4) + +#define SUN20I_GPADC_CTRL_ADC_AUTOCALI_EN_MASK BIT(23) +#define SUN20I_GPADC_CTRL_WORK_MODE_MASK GENMASK(19, 18) +#define SUN20I_GPADC_CTRL_ADC_EN_MASK BIT(16) +#define SUN20I_GPADC_CS_EN_ADC_CH(x) BIT(x) +#define SUN20I_GPADC_DATA_INTC_CH_DATA_IRQ_EN(x) BIT(x) + +#define SUN20I_GPADC_WORK_MODE_SINGLE 0 + +struct sun20i_gpadc_iio { + void __iomem *regs; + struct completion completion; + int last_channel; + /* + * Lock to protect the device state during a potential concurrent + * read access from userspace. Reading a raw value requires a sequence + * of register writes, then a wait for a completion callback, + * and finally a register read, during which userspace could issue + * another read request. This lock protects a read access from + * ocurring before another one has finished. + */ + struct mutex lock; +}; + +static int sun20i_gpadc_adc_read(struct sun20i_gpadc_iio *info, + struct iio_chan_spec const *chan, int *val) +{ + u32 ctrl; + int ret = IIO_VAL_INT; + + mutex_lock(&info->lock); + + reinit_completion(&info->completion); + + if (info->last_channel != chan->channel) { + info->last_channel = chan->channel; + + /* enable the analog input channel */ + writel(SUN20I_GPADC_CS_EN_ADC_CH(chan->channel), + info->regs + SUN20I_GPADC_CS_EN); + + /* enable the data irq for input channel */ + writel(SUN20I_GPADC_DATA_INTC_CH_DATA_IRQ_EN(chan->channel), + info->regs + SUN20I_GPADC_DATA_INTC); + } + + /* enable the ADC function */ + ctrl = readl(info->regs + SUN20I_GPADC_CTRL); + ctrl |= FIELD_PREP(SUN20I_GPADC_CTRL_ADC_EN_MASK, 1); + writel(ctrl, info->regs + SUN20I_GPADC_CTRL); + + /* + * According to the datasheet maximum acquire time(TACQ) can be + * (65535+1)/24Mhz and conversion time(CONV_TIME) is always constant + * and equal to 14/24Mhz, so (TACQ+CONV_TIME) <= 2.73125ms. + * A 10ms delay should be enough to make sure an interrupt occurs in + * normal conditions. If it doesn't occur, then there is a timeout. + */ + if (!wait_for_completion_timeout(&info->completion, msecs_to_jiffies(10))) { + ret = -ETIMEDOUT; + goto err_unlock; + } + + /* read the ADC data */ + *val = readl(info->regs + SUN20I_GPADC_CH_DATA(chan->channel)); + +err_unlock: + mutex_unlock(&info->lock); + + return ret; +} + +static int sun20i_gpadc_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, + int *val2, long mask) +{ + struct sun20i_gpadc_iio *info = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + return sun20i_gpadc_adc_read(info, chan, val); + case IIO_CHAN_INFO_SCALE: + /* value in mv = 1800mV / 4096 raw */ + *val = 1800; + *val2 = 12; + return IIO_VAL_FRACTIONAL_LOG2; + default: + return -EINVAL; + } +} + +static irqreturn_t sun20i_gpadc_irq_handler(int irq, void *data) +{ + struct sun20i_gpadc_iio *info = data; + + /* clear data interrupt status register */ + writel(GENMASK(31, 0), info->regs + SUN20I_GPADC_DATA_INTS); + + complete(&info->completion); + + return IRQ_HANDLED; +} + +static const struct iio_info sun20i_gpadc_iio_info = { + .read_raw = sun20i_gpadc_read_raw, +}; + +static void sun20i_gpadc_reset_assert(void *data) +{ + struct reset_control *rst = data; + + reset_control_assert(rst); +} + +static int sun20i_gpadc_alloc_channels(struct iio_dev *indio_dev, + struct device *dev) +{ + unsigned int channel; + int num_channels, i, ret; + struct iio_chan_spec *channels; + struct fwnode_handle *node; + + num_channels = device_get_child_node_count(dev); + if (num_channels == 0) + return dev_err_probe(dev, -ENODEV, "no channel children\n"); + + channels = devm_kcalloc(dev, num_channels, sizeof(*channels), + GFP_KERNEL); + if (!channels) + return -ENOMEM; + + i = 0; + device_for_each_child_node(dev, node) { + ret = fwnode_property_read_u32(node, "reg", &channel); + if (ret) { + fwnode_handle_put(node); + return dev_err_probe(dev, ret, "invalid channel number\n"); + } + + channels[i].type = IIO_VOLTAGE; + channels[i].indexed = 1; + channels[i].channel = channel; + channels[i].info_mask_separate = BIT(IIO_CHAN_INFO_RAW); + channels[i].info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE); + + i++; + } + + indio_dev->channels = channels; + indio_dev->num_channels = num_channels; + + return 0; +} + +static int sun20i_gpadc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct iio_dev *indio_dev; + struct sun20i_gpadc_iio *info; + struct reset_control *rst; + struct clk *clk; + int irq; + int ret; + + indio_dev = devm_iio_device_alloc(dev, sizeof(*info)); + if (!indio_dev) + return -ENOMEM; + + info = iio_priv(indio_dev); + info->last_channel = -1; + + mutex_init(&info->lock); + init_completion(&info->completion); + + ret = sun20i_gpadc_alloc_channels(indio_dev, dev); + if (ret) + return ret; + + indio_dev->info = &sun20i_gpadc_iio_info; + indio_dev->name = SUN20I_GPADC_DRIVER_NAME; + + info->regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(info->regs)) + return PTR_ERR(info->regs); + + clk = devm_clk_get_enabled(dev, NULL); + if (IS_ERR(clk)) + return dev_err_probe(dev, PTR_ERR(clk), "failed to enable bus clock\n"); + + rst = devm_reset_control_get_exclusive(dev, NULL); + if (IS_ERR(rst)) + return dev_err_probe(dev, PTR_ERR(rst), "failed to get reset control\n"); + + ret = reset_control_deassert(rst); + if (ret) + return dev_err_probe(dev, ret, "failed to deassert reset\n"); + + ret = devm_add_action_or_reset(dev, sun20i_gpadc_reset_assert, rst); + if (ret) + return ret; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + ret = devm_request_irq(dev, irq, sun20i_gpadc_irq_handler, 0, + dev_name(dev), info); + if (ret) + return dev_err_probe(dev, ret, "failed requesting irq %d\n", irq); + + writel(FIELD_PREP(SUN20I_GPADC_CTRL_ADC_AUTOCALI_EN_MASK, 1) | + FIELD_PREP(SUN20I_GPADC_CTRL_WORK_MODE_MASK, SUN20I_GPADC_WORK_MODE_SINGLE), + info->regs + SUN20I_GPADC_CTRL); + + ret = devm_iio_device_register(dev, indio_dev); + if (ret) + return dev_err_probe(dev, ret, "could not register the device\n"); + + return 0; +} + +static const struct of_device_id sun20i_gpadc_of_id[] = { + { .compatible = "allwinner,sun20i-d1-gpadc" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, sun20i_gpadc_of_id); + +static struct platform_driver sun20i_gpadc_driver = { + .driver = { + .name = SUN20I_GPADC_DRIVER_NAME, + .of_match_table = sun20i_gpadc_of_id, + }, + .probe = sun20i_gpadc_probe, +}; +module_platform_driver(sun20i_gpadc_driver); + +MODULE_DESCRIPTION("ADC driver for sunxi platforms"); +MODULE_AUTHOR("Maksim Kiselev "); +MODULE_LICENSE("GPL"); From patchwork Sat Jul 15 09:18:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maksim Kiselev X-Patchwork-Id: 13314438 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3E471EB64DC for ; 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([92.51.95.194]) by smtp.gmail.com with ESMTPSA id b17-20020a2e9891000000b002b840f283a7sm561784ljj.36.2023.07.15.02.18.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 15 Jul 2023 02:18:39 -0700 (PDT) From: Maksim Kiselev To: linux-iio@vger.kernel.org Cc: Maksim Kiselev , Conor Dooley , Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Paul Walmsley , Palmer Dabbelt , Albert Ou , Philipp Zabel , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: [PATCH v9 3/4] dt-bindings: iio: adc: Add Allwinner D1/T113s/R329/T507 SoCs GPADC Date: Sat, 15 Jul 2023 12:18:15 +0300 Message-Id: <20230715091816.3074375-4-bigunclemax@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230715091816.3074375-1-bigunclemax@gmail.com> References: <20230715091816.3074375-1-bigunclemax@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230715_021842_412619_7B333B07 X-CRM114-Status: GOOD ( 12.79 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Allwinner's D1/T113s/R329/T507 SoCs have a new general purpose ADC. This ADC is the same for all of this SoCs. The only difference is the number of available channels. Reviewed-by: Conor Dooley Signed-off-by: Maksim Kiselev --- .../iio/adc/allwinner,sun20i-d1-gpadc.yaml | 91 +++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml diff --git a/Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml b/Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml new file mode 100644 index 000000000000..7ef46c90ebc8 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml @@ -0,0 +1,91 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/allwinner,sun20i-d1-gpadc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Allwinner D1 General Purpose ADC + +maintainers: + - Maksim Kiselev + +properties: + compatible: + enum: + - allwinner,sun20i-d1-gpadc + + "#io-channel-cells": + const: 1 + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + + clocks: + maxItems: 1 + + interrupts: + maxItems: 1 + + reg: + maxItems: 1 + + resets: + maxItems: 1 + +patternProperties: + "^channel@[0-9a-f]+$": + $ref: adc.yaml + type: object + description: + Represents the internal channels of the ADC. + + properties: + reg: + items: + minimum: 0 + maximum: 15 + + required: + - reg + + unevaluatedProperties: false + +required: + - "#io-channel-cells" + - clocks + - compatible + - interrupts + - reg + - resets + +additionalProperties: false + +examples: + - | + #include + #include + #include + + gpadc: adc@2009000 { + compatible = "allwinner,sun20i-d1-gpadc"; + reg = <0x2009000 0x400>; + clocks = <&ccu CLK_BUS_GPADC>; + resets = <&ccu RST_BUS_GPADC>; + interrupts = <73 IRQ_TYPE_LEVEL_HIGH>; + #io-channel-cells = <1>; + + #address-cells = <1>; + #size-cells = <0>; + + channel@0 { + reg = <0>; + }; + + channel@1 { + reg = <1>; + }; + }; +... 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([92.51.95.194]) by smtp.gmail.com with ESMTPSA id b17-20020a2e9891000000b002b840f283a7sm561784ljj.36.2023.07.15.02.18.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 15 Jul 2023 02:18:42 -0700 (PDT) From: Maksim Kiselev To: linux-iio@vger.kernel.org Cc: Maksim Kiselev , Conor Dooley , Jernej Skrabec , Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chen-Yu Tsai , Samuel Holland , Paul Walmsley , Palmer Dabbelt , Albert Ou , Philipp Zabel , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: [PATCH v9 4/4] riscv: dts: allwinner: d1: Add GPADC node Date: Sat, 15 Jul 2023 12:18:16 +0300 Message-Id: <20230715091816.3074375-5-bigunclemax@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230715091816.3074375-1-bigunclemax@gmail.com> References: <20230715091816.3074375-1-bigunclemax@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230715_021844_964039_3CE35766 X-CRM114-Status: UNSURE ( 8.79 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add declaration of the general purpose ADC for D1 and T113s SoCs. Signed-off-by: Maksim Kiselev Reviewed-by: Conor Dooley Acked-by: Jernej Skrabec --- arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi b/arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi index 1bb1e5cae602..d59b4acf183a 100644 --- a/arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi +++ b/arch/riscv/boot/dts/allwinner/sunxi-d1s-t113.dtsi @@ -144,6 +144,16 @@ ccu: clock-controller@2001000 { #reset-cells = <1>; }; + gpadc: adc@2009000 { + compatible = "allwinner,sun20i-d1-gpadc"; + reg = <0x2009000 0x400>; + clocks = <&ccu CLK_BUS_GPADC>; + resets = <&ccu RST_BUS_GPADC>; + interrupts = ; + status = "disabled"; + #io-channel-cells = <1>; + }; + dmic: dmic@2031000 { compatible = "allwinner,sun20i-d1-dmic", "allwinner,sun50i-h6-dmic";