From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ed1-f41.google.com (mail-ed1-f41.google.com [209.85.208.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E28897B for ; Fri, 15 Apr 2022 18:21:58 +0000 (UTC) Received: by mail-ed1-f41.google.com with SMTP id b15so10725120edn.4 for ; Fri, 15 Apr 2022 11:21:58 -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=2PQVWiHx93icOlykBtTVU6fhMCvfEE9ajlxw/JbX9tk=; b=nDqMmCrzZ/RJYcFVEehDawcwyUKWiH7DEZvbU5N0jebFmEqRQf0rbPjEu4ebEtONk7 K3iPP9ZOy5uj5oWfmo3F+j4CzZxs7JWsRCnQMVKn+w4yDlC+bfIEueBxsSGZpdqfpviK EkFXXpyCL/OpaFBD5ruViZx4MTlckcKR1dvLTEGQ9zJDDn6tF0MXYbMUxCk9fHkIPZ+5 J4uWgxH8I9TTjHtWJePoAVit+ZtekXYotjkod3pkmYv5ywhCgBfa3aL/XqnqCNh5LAdf D+udtgOtC2AgyXC0GUAVunAQxQrF5UqrSdObWxhiTR5NOWb5Glr2LabFvOMritXNpejw hGzw== 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=2PQVWiHx93icOlykBtTVU6fhMCvfEE9ajlxw/JbX9tk=; b=kPehfTqWGD5/KCuJGlsg6ui4KOd+oDq6Jvfk8Pi2d83+ItzyGpaJAYQngJbd4bosqw cuaxXx66l1Jr+XCvbrHIbBPwmsMPkAtZghV4tTd+zaq05XrQjk4ZqOPUTuLnEzGJxCbs CpESQowRVtOXKavu1cadesxl35qY/CCCNM1KP93i9yAG5DjwNi3ztqPBA1X6FIFsNYv6 Y8jNDy1yvrHCu3M3/7o53kRRZ856r15s0qPBsptNPxZyQl9qjQ/4yPkKMHd3wQ3FVUHQ XBMN+cJ00UbDQeCnnlty6c18r87inHVf1lrtkbsyn/g4BbWgSrTId7XmFy4sRelc7Hbx tI7g== X-Gm-Message-State: AOAM532khyKUqbPSfGKgamNbwV0PRyz6pI5blaeZzmg7mzSJXT03OSoJ kJ1bsd01MvAVHWOlz7m3jZjE6RR5VVBwfQ== X-Google-Smtp-Source: ABdhPJx3tAA1b57FqowvswLdUaAFlwRzKdSzq0UpYQtBvXK4epBT4qXR+T91BRr8Zrxb06jm5WM4rw== X-Received: by 2002:a05:6402:3318:b0:41d:893e:4d6 with SMTP id e24-20020a056402331800b0041d893e04d6mr437242eda.225.1650046917267; Fri, 15 Apr 2022 11:21:57 -0700 (PDT) Received: from jernej-laptop.localnet (89-212-118-115.static.t-2.net. [89.212.118.115]) by smtp.gmail.com with ESMTPSA id w1-20020a1709064a0100b006e89334f5dfsm1910230eju.136.2022.04.15.11.21.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Apr 2022 11:21:56 -0700 (PDT) From: Jernej =?utf-8?B?xaBrcmFiZWM=?= To: Dmitry Torokhov , Hans de Goede , Samuel Holland Cc: Samuel Holland , Maxime Ripard , Rob Herring , Chen-Yu Tsai , Krzysztof Kozlowski , Maxime Ripard , Rob Herring , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-sunxi@lists.linux.dev, Philipp Zabel Subject: Re: [PATCH v2 2/3] Input: sun4i-lradc-keys: Add optional clock/reset support Date: Fri, 15 Apr 2022 20:21:55 +0200 Message-ID: <2821426.e9J7NaK4W3@jernej-laptop> In-Reply-To: <20220414002349.24332-2-samuel@sholland.org> References: <20220414002349.24332-1-samuel@sholland.org> <20220414002349.24332-2-samuel@sholland.org> Precedence: bulk X-Mailing-List: linux-sunxi@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" Dne =C4=8Detrtek, 14. april 2022 ob 02:23:47 CEST je Samuel Holland napisal= (a): > Until the R329, the LRADC hardware was always active. Now it requires > enabling a clock gate and deasserting a reset line. Add support for this > variant of the hardware. >=20 > Signed-off-by: Samuel Holland Acked-by: Jernej Skrabec Best regards, Jernej > --- >=20 > Changes in v2: > - Guard the code with a flag instead of using "_optional" variants. >=20 > drivers/input/keyboard/sun4i-lradc-keys.c | 33 +++++++++++++++++++++++ > 1 file changed, 33 insertions(+) >=20 > diff --git a/drivers/input/keyboard/sun4i-lradc-keys.c > b/drivers/input/keyboard/sun4i-lradc-keys.c index > 4a796bed48ac..5630334a6c09 100644 > --- a/drivers/input/keyboard/sun4i-lradc-keys.c > +++ b/drivers/input/keyboard/sun4i-lradc-keys.c > @@ -14,6 +14,7 @@ > * there are no boards known to use channel 1. > */ >=20 > +#include > #include > #include > #include > @@ -23,6 +24,7 @@ > #include > #include > #include > +#include > #include >=20 > #define LRADC_CTRL 0x00 > @@ -58,10 +60,12 @@ > /* struct lradc_variant - Describe sun4i-a10-lradc-keys hardware variant > * @divisor_numerator: The numerator of lradc Vref internally=20 divisor > * @divisor_denominator: The denominator of lradc Vref internally=20 divisor > + * @has_clock_reset: If the binding requires a clock and reset > */ > struct lradc_variant { > u8 divisor_numerator; > u8 divisor_denominator; > + bool has_clock_reset; > }; >=20 > static const struct lradc_variant lradc_variant_a10 =3D { > @@ -83,6 +87,8 @@ struct sun4i_lradc_data { > struct device *dev; > struct input_dev *input; > void __iomem *base; > + struct clk *clk; > + struct reset_control *reset; > struct regulator *vref_supply; > struct sun4i_lradc_keymap *chan0_map; > const struct lradc_variant *variant; > @@ -140,6 +146,14 @@ static int sun4i_lradc_open(struct input_dev *dev) > if (error) > return error; >=20 > + error =3D reset_control_deassert(lradc->reset); > + if (error) > + goto err_disable_reg; > + > + error =3D clk_prepare_enable(lradc->clk); > + if (error) > + goto err_assert_reset; > + > lradc->vref =3D regulator_get_voltage(lradc->vref_supply) * > lradc->variant->divisor_numerator / > lradc->variant->divisor_denominator; > @@ -153,6 +167,13 @@ static int sun4i_lradc_open(struct input_dev *dev) > writel(CHAN0_KEYUP_IRQ | CHAN0_KEYDOWN_IRQ, lradc->base +=20 LRADC_INTC); >=20 > return 0; > + > +err_assert_reset: > + reset_control_assert(lradc->reset); > +err_disable_reg: > + regulator_disable(lradc->vref_supply); > + > + return error; > } >=20 > static void sun4i_lradc_close(struct input_dev *dev) > @@ -164,6 +185,8 @@ static void sun4i_lradc_close(struct input_dev *dev) > SAMPLE_RATE(2), lradc->base + LRADC_CTRL); > writel(0, lradc->base + LRADC_INTC); >=20 > + clk_disable_unprepare(lradc->clk); > + reset_control_assert(lradc->reset); > regulator_disable(lradc->vref_supply); > } >=20 > @@ -243,6 +266,16 @@ static int sun4i_lradc_probe(struct platform_device > *pdev) return -EINVAL; > } >=20 > + if (lradc->variant->has_clock_reset) { > + lradc->clk =3D devm_clk_get(dev, NULL); > + if (IS_ERR(lradc->clk)) > + return PTR_ERR(lradc->clk); > + > + lradc->reset =3D devm_reset_control_get_exclusive(dev,=20 NULL); > + if (IS_ERR(lradc->reset)) > + return PTR_ERR(lradc->reset); > + } > + > lradc->vref_supply =3D devm_regulator_get(dev, "vref"); > if (IS_ERR(lradc->vref_supply)) > return PTR_ERR(lradc->vref_supply); 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[89.212.118.115]) by smtp.gmail.com with ESMTPSA id w1-20020a1709064a0100b006e89334f5dfsm1910230eju.136.2022.04.15.11.21.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Apr 2022 11:21:56 -0700 (PDT) From: Jernej =?utf-8?B?xaBrcmFiZWM=?= To: Dmitry Torokhov , Hans de Goede , Samuel Holland Cc: Samuel Holland , Maxime Ripard , Rob Herring , Chen-Yu Tsai , Krzysztof Kozlowski , Maxime Ripard , Rob Herring , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-sunxi@lists.linux.dev, Philipp Zabel Subject: Re: [PATCH v2 2/3] Input: sun4i-lradc-keys: Add optional clock/reset support Date: Fri, 15 Apr 2022 20:21:55 +0200 Message-ID: <2821426.e9J7NaK4W3@jernej-laptop> In-Reply-To: <20220414002349.24332-2-samuel@sholland.org> References: <20220414002349.24332-1-samuel@sholland.org> <20220414002349.24332-2-samuel@sholland.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 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