From mboxrd@z Thu Jan 1 00:00:00 1970 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2F72AC4321E for ; Tue, 28 Sep 2021 13:33:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 17F7161246 for ; Tue, 28 Sep 2021 13:33:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241272AbhI1Ner (ORCPT ); Tue, 28 Sep 2021 09:34:47 -0400 Received: from relay3-d.mail.gandi.net ([217.70.183.195]:48961 "EHLO relay3-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241229AbhI1NeZ (ORCPT ); Tue, 28 Sep 2021 09:34:25 -0400 Received: (Authenticated sender: miquel.raynal@bootlin.com) by relay3-d.mail.gandi.net (Postfix) with ESMTPSA id 62D9760011; Tue, 28 Sep 2021 13:32:42 +0000 (UTC) From: Miquel Raynal To: Jonathan Cameron , Lars-Peter Clausen , Lee Jones Cc: Peter Meerwald-Stadler , Rob Herring , Dmitry Torokhov , bcousson@baylibre.com, Tony Lindgren , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-omap@vger.kernel.org, Thomas Petazzoni , Vignesh Raghavendra , Lokesh Vutla , Tero Kristo , Ryan Barnett , Grygorii Strashko , Jason Reeder , , Miquel Raynal , Jonathan Cameron Subject: [PATCH v4 22/48] mfd: ti_am335x_tscadc: Gather the ctrl register logic in one place Date: Tue, 28 Sep 2021 15:31:17 +0200 Message-Id: <20210928133143.157329-23-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210928133143.157329-1-miquel.raynal@bootlin.com> References: <20210928133143.157329-1-miquel.raynal@bootlin.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Instead of deriving in the probe and in the resume path the value of the ctrl register, let's do it only once in the probe, save the value of this register (all but the subsystem enable bit) in the driver's structure and use it from the resume callback. Signed-off-by: Miquel Raynal Reviewed-by: Jonathan Cameron --- drivers/mfd/ti_am335x_tscadc.c | 39 ++++++++++------------------ include/linux/mfd/ti_am335x_tscadc.h | 2 +- 2 files changed, 15 insertions(+), 26 deletions(-) diff --git a/drivers/mfd/ti_am335x_tscadc.c b/drivers/mfd/ti_am335x_tscadc.c index 01c2b7d1c18c..df4f905a7b52 100644 --- a/drivers/mfd/ti_am335x_tscadc.c +++ b/drivers/mfd/ti_am335x_tscadc.c @@ -121,7 +121,7 @@ static int ti_tscadc_probe(struct platform_device *pdev) struct property *prop; const __be32 *cur; u32 val; - int err, ctrl; + int err; int tsc_wires = 0, adc_channels = 0, cell_idx = 0, total_channels; int readouts = 0; @@ -217,22 +217,25 @@ static int ti_tscadc_probe(struct platform_device *pdev) tscadc->clk_div = (clk_get_rate(clk) / tscadc->data->target_clk_rate) - 1; regmap_write(tscadc->regmap, REG_CLKDIV, tscadc->clk_div); - /* Set the control register bits */ - ctrl = CNTRLREG_STEPCONFIGWRT | CNTRLREG_STEPID; + /* + * Set the control register bits. tscadc->ctrl stores the configuration + * of the CTRL register but not the subsystem enable bit which must be + * added manually when timely. + */ + tscadc->ctrl = CNTRLREG_STEPCONFIGWRT | CNTRLREG_STEPID; if (tsc_wires > 0) { - tscadc->tsc_wires = tsc_wires; + tscadc->ctrl |= CNTRLREG_TSCENB; if (tsc_wires == 5) - ctrl |= CNTRLREG_5WIRE | CNTRLREG_TSCENB; + tscadc->ctrl |= CNTRLREG_5WIRE; else - ctrl |= CNTRLREG_4WIRE | CNTRLREG_TSCENB; + tscadc->ctrl |= CNTRLREG_4WIRE; } - regmap_write(tscadc->regmap, REG_CTRL, ctrl); + regmap_write(tscadc->regmap, REG_CTRL, tscadc->ctrl); tscadc_idle_config(tscadc); /* Enable the TSC module enable bit */ - ctrl |= CNTRLREG_TSCSSENB; - regmap_write(tscadc->regmap, REG_CTRL, ctrl); + regmap_write(tscadc->regmap, REG_CTRL, tscadc->ctrl | CNTRLREG_TSCSSENB); /* TSC Cell */ if (tsc_wires > 0) { @@ -307,27 +310,13 @@ static int __maybe_unused tscadc_suspend(struct device *dev) static int __maybe_unused tscadc_resume(struct device *dev) { struct ti_tscadc_dev *tscadc = dev_get_drvdata(dev); - u32 ctrl; pm_runtime_get_sync(dev); - /* context restore */ regmap_write(tscadc->regmap, REG_CLKDIV, tscadc->clk_div); - - ctrl = CNTRLREG_STEPCONFIGWRT | CNTRLREG_STEPID; - if (tscadc->tsc_wires > 0) { - if (tscadc->tsc_wires == 5) - ctrl |= CNTRLREG_5WIRE | CNTRLREG_TSCENB; - else - ctrl |= CNTRLREG_4WIRE | CNTRLREG_TSCENB; - } - - regmap_write(tscadc->regmap, REG_CTRL, ctrl); - + regmap_write(tscadc->regmap, REG_CTRL, tscadc->ctrl); tscadc_idle_config(tscadc); - - ctrl |= CNTRLREG_TSCSSENB; - regmap_write(tscadc->regmap, REG_CTRL, ctrl); + regmap_write(tscadc->regmap, REG_CTRL, tscadc->ctrl | CNTRLREG_TSCSSENB); return 0; } diff --git a/include/linux/mfd/ti_am335x_tscadc.h b/include/linux/mfd/ti_am335x_tscadc.h index 23442059d271..c9c6f0b29181 100644 --- a/include/linux/mfd/ti_am335x_tscadc.h +++ b/include/linux/mfd/ti_am335x_tscadc.h @@ -177,8 +177,8 @@ struct ti_tscadc_dev { phys_addr_t tscadc_phys_base; const struct ti_tscadc_data *data; int irq; - int tsc_wires; struct mfd_cell cells[TSCADC_CELLS]; + u32 ctrl; u32 reg_se_cache; bool adc_waiting; bool adc_in_use; -- 2.27.0