From patchwork Sat Jun 3 18:53:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shreeya Patel X-Patchwork-Id: 688839 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 8BE62C7EE2D for ; Sat, 3 Jun 2023 18:54:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229451AbjFCSyj (ORCPT ); Sat, 3 Jun 2023 14:54:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35560 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229711AbjFCSyh (ORCPT ); Sat, 3 Jun 2023 14:54:37 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8E9C81A8; Sat, 3 Jun 2023 11:54:35 -0700 (PDT) Received: from localhost.localdomain (unknown [IPv6:2405:201:0:21ea:e49:10dd:40c0:e842]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: shreeya) by madras.collabora.co.uk (Postfix) with ESMTPSA id 1E84D6603147; Sat, 3 Jun 2023 19:54:29 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1685818474; bh=5qal4yReBLe0r8IINy7OGXm+hpHMLxOtRFTpvqe4d8o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mpZaRIylG+JEVf4lXivK3l3Y2PgZQLThn9aewLTwnggkUKqVX2+/ms9MAn+EXm87G 1jcUNMeBXCmRO+HJoH41W67jPPrth3d1aTY3gNbuOF2pm5k6UmHlMfSnfi/UaHU244 nof49j+6GwwhuYH4tpD8jtMqRxaYVvDldSNraj+/JbMQZwgDi06f1PcFCpltxMZhie fGDXXGRw3IqX4UakQB3cG4Z6IghptSHb4Yl8H5O85k8gyex3P3QFaqNkvRkaidyFMG qWWoHq5t8D6FBvBeox5xLifhulAkkdOWM4Duc8kwQzpebMLMzCeb1Er+/LdU2Q8yPJ 5QWAQRIOVuJIg== From: Shreeya Patel To: jic23@kernel.org, lars@metafoo.de, heiko@sntech.de, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, sebastian.reichel@collabora.com Cc: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, gustavo.padovan@collabora.com, kernel@collabora.com, serge.broslavsky@collabora.com, Shreeya Patel , Simon Xue , AngeloGioacchino Del Regno Subject: [PATCH v3 2/8] iio: adc: rockchip_saradc: Add support for RK3588 Date: Sun, 4 Jun 2023 00:23:34 +0530 Message-Id: <20230603185340.13838-3-shreeya.patel@collabora.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230603185340.13838-1-shreeya.patel@collabora.com> References: <20230603185340.13838-1-shreeya.patel@collabora.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Simon Xue Add new start and read functions to support rk3588 device. Also, add a device compatible string for the same. Signed-off-by: Simon Xue Signed-off-by: Shreeya Patel Reviewed-by: AngeloGioacchino Del Regno --- Changes in v3 - Add bitfield.h header file. - Add a Reviewed-by tag. Changes in v2 - Add a from address. - Create separate patches for adding new device support and changes to the old device code. - Make use of FIELD_PREP. drivers/iio/adc/rockchip_saradc.c | 70 +++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) diff --git a/drivers/iio/adc/rockchip_saradc.c b/drivers/iio/adc/rockchip_saradc.c index 21f9d92a6af4..312286ec91dc 100644 --- a/drivers/iio/adc/rockchip_saradc.c +++ b/drivers/iio/adc/rockchip_saradc.c @@ -4,6 +4,7 @@ * Copyright (C) 2014 ROCKCHIP, Inc. */ +#include #include #include #include @@ -38,6 +39,22 @@ #define SARADC_TIMEOUT msecs_to_jiffies(100) #define SARADC_MAX_CHANNELS 8 +/* v2 registers */ +#define SARADC2_CONV_CON 0x0 +#define SARADC_T_PD_SOC 0x4 +#define SARADC_T_DAS_SOC 0xc +#define SARADC2_END_INT_EN 0x104 +#define SARADC2_ST_CON 0x108 +#define SARADC2_STATUS 0x10c +#define SARADC2_END_INT_ST 0x110 +#define SARADC2_DATA_BASE 0x120 + +#define SARADC2_EN_END_INT BIT(0) +#define SARADC2_START BIT(4) +#define SARADC2_SINGLE_MODE BIT(5) + +#define SARADC2_CONV_CHANNELS GENMASK(15, 0) + struct rockchip_saradc; struct rockchip_saradc_data { @@ -76,6 +93,25 @@ static void rockchip_saradc_start_v1(struct rockchip_saradc *info, int chn) SARADC_CTRL_IRQ_ENABLE, info->regs + SARADC_CTRL); } +static void rockchip_saradc_start_v2(struct rockchip_saradc *info, int chn) +{ + int val; + + if (info->reset) + rockchip_saradc_reset_controller(info->reset); + + writel_relaxed(0xc, info->regs + SARADC_T_DAS_SOC); + writel_relaxed(0x20, info->regs + SARADC_T_PD_SOC); + val = FIELD_PREP(SARADC2_EN_END_INT, 1); + val |= val << 16; + writel_relaxed(val, info->regs + SARADC2_END_INT_EN); + val = FIELD_PREP(SARADC2_START, 1) | + FIELD_PREP(SARADC2_SINGLE_MODE, 1) | + FIELD_PREP(SARADC2_CONV_CHANNELS, chn); + val |= val << 16; + writel(val, info->regs + SARADC2_CONV_CON); +} + static void rockchip_saradc_start(struct rockchip_saradc *info, int chn) { info->data->start(info, chn); @@ -86,6 +122,18 @@ static int rockchip_saradc_read_v1(struct rockchip_saradc *info) return readl_relaxed(info->regs + SARADC_DATA); } +static int rockchip_saradc_read_v2(struct rockchip_saradc *info) +{ + int offset; + + /* Clear irq */ + writel_relaxed(0x1, info->regs + SARADC2_END_INT_ST); + + offset = SARADC2_DATA_BASE + info->last_chan->channel * 0x4; + + return readl_relaxed(info->regs + offset); +} + static int rockchip_saradc_read(struct rockchip_saradc *info) { return info->data->read(info); @@ -248,6 +296,25 @@ static const struct rockchip_saradc_data rk3568_saradc_data = { .power_down = rockchip_saradc_power_down_v1, }; +static const struct iio_chan_spec rockchip_rk3588_saradc_iio_channels[] = { + SARADC_CHANNEL(0, "adc0", 12), + SARADC_CHANNEL(1, "adc1", 12), + SARADC_CHANNEL(2, "adc2", 12), + SARADC_CHANNEL(3, "adc3", 12), + SARADC_CHANNEL(4, "adc4", 12), + SARADC_CHANNEL(5, "adc5", 12), + SARADC_CHANNEL(6, "adc6", 12), + SARADC_CHANNEL(7, "adc7", 12), +}; + +static const struct rockchip_saradc_data rk3588_saradc_data = { + .channels = rockchip_rk3588_saradc_iio_channels, + .num_channels = ARRAY_SIZE(rockchip_rk3588_saradc_iio_channels), + .clk_rate = 1000000, + .start = rockchip_saradc_start_v2, + .read = rockchip_saradc_read_v2, +}; + static const struct of_device_id rockchip_saradc_match[] = { { .compatible = "rockchip,saradc", @@ -261,6 +328,9 @@ static const struct of_device_id rockchip_saradc_match[] = { }, { .compatible = "rockchip,rk3568-saradc", .data = &rk3568_saradc_data, + }, { + .compatible = "rockchip,rk3588-saradc", + .data = &rk3588_saradc_data, }, {}, };