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Sat, 15 Sep 2018 01:35:24 +0000 Received: from CY4PR21MB0776.namprd21.prod.outlook.com ([fe80::151:b6fe:32c8:cccd]) by CY4PR21MB0776.namprd21.prod.outlook.com ([fe80::151:b6fe:32c8:cccd%9]) with mapi id 15.20.1164.008; Sat, 15 Sep 2018 01:35:24 +0000 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Douglas Anderson , Linus Walleij , Sasha Levin Subject: [PATCH AUTOSEL 4.4 20/20] pinctrl: qcom: spmi-gpio: Fix pmic_gpio_config_get() to be compliant Thread-Topic: [PATCH AUTOSEL 4.4 20/20] pinctrl: qcom: spmi-gpio: Fix pmic_gpio_config_get() to be compliant Thread-Index: AQHUTJRbrPpVERYP4UeY3DM/aSsCZA== Date: Sat, 15 Sep 2018 01:35:17 +0000 Message-ID: <20180915013502.180110-20-alexander.levin@microsoft.com> References: <20180915013502.180110-1-alexander.levin@microsoft.com> In-Reply-To: <20180915013502.180110-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;CY4PR21MB0280;6:wnwIqWgOQFlOiJy2fWKhIwR3Rm21NUbA25kywvkz+AZo30Oa8+60UViS1GoUDc0gpHJjMePIYqXqKjh5d7ZYd2XCgs6nMThc8xipwVm0m1hgRXElO+pH8FNv/yWa3yxzrNyqUoLbs6rG1KEkn3F+TNjdtpmen9DKYlsAnB2k1F3wOK2z7zLY5QLSdx1yo0+4u8bRGUf/Vgg7b/aYBn69SZt3bSE8N3GcoMer8DEXlTTeFSvqzYcVbg0N9fIoYJUFVqUYgoEtmimm2gJu+v59Mz+WIC2v2ErwVv90Q5fGZCmrgh+arohgCuP8/QJm2sZeitJbzSlPCAhLnv+L/hQDkQgcCFl50XFRdrs6vWZdIJP+LvFs8tVQD3DFUMwUu4e/kgxzfr42NMObEqwrYiLuDSWj7bqQZFnJnDSlnrlBGkMJeW3rvRFFTju8BByl0ZLAhDMHFXsren7l9a69JxFP5g==;5:GyYOnRPZDWhBfgW5AEj3dbS3q6LsnOMUlXzbE4hn+MChALdZMn0WKyvOLLnC+3BIUos18NZBbmDPm1wA1VETGPVFuBBd6a6Sj82E3pDW1VgbamB6HgzSjRfpOum9knZox8YOtAGFG0DuLzEgV/RbVbS0MDoXpF018mCL7E0j9ao=;7:JJzBeXMtpx/uOrRe/wIKVMc1gol31SvNtt5N+3TKjddm5u/spD1lr+uNIDALQ40JsKp9efxitD32RkCaO00ZgJE+GNHQQi8lrFmOyzGrNxGuvfnlYT8giGcjRGqJ/qiantAB86F62oBcW4WIOpYNLBfKachrGptmEzautfJOCAemT3IJqYHu3CSIhRc0rA2lZdIW9ktzd62pauzzHwM8dNoe+thQTxO1xPDc3zQgeX41i3IF8HVFiSn+Tzpf/ixo x-ms-office365-filtering-correlation-id: 034eb933-a9b1-4085-d107-08d61aab8227 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(7020095)(4652040)(8989137)(4534165)(4627221)(201703031133081)(201702281549075)(8990107)(5600074)(711020)(4618075)(2017052603328)(7193020);SRVR:CY4PR21MB0280; 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received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-message-info: D4mng0FGtOKD514aykBhQTGJ+sKm4lgraeJ/UYyQgskn+RcacvKO4h/MbiX278qqS48O3k8zTbmkS3ruIfcXybhjWDEY8A+N9aDqy966pLPMc+rgEDEGhfQdqwdPrOiPQmrxTAif5807yG0dIOIgGfFp2ZX4P5w2optARDiiBQyPYQNqnvHLSZRUY9LOOXk/hNhwoRnVf4FvZ6inzb2NbRVtVta27iapxvIxQ1qTz6o/HRkyvhe1H+96MicqKDGAD8D1eideuAmDAETdruiIGqc8iLsNvFTapWi9g3VTrdWHbrLBNCxyYVag05FcUzziyGBuhNQm9BY9LzroX4iM9bsHb3aZ9Wwp/DGyquqasTI= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 034eb933-a9b1-4085-d107-08d61aab8227 X-MS-Exchange-CrossTenant-originalarrivaltime: 15 Sep 2018 01:35:17.4570 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR21MB0280 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Douglas Anderson [ Upstream commit 1cf86bc21257a330e3af51f2a4e885f1a705f6a5 ] If you do this on an sdm845 board: grep "" /sys/kernel/debug/pinctrl/*spmi:pmic*/pinconf-groups ...it looks like nonsense. For every pin you see listed: input bias disabled, input bias high impedance, input bias pull down, inp= ut bias pull up, ... That's because pmic_gpio_config_get() isn't complying with the rules that pinconf_generic_dump_one() expects. Specifically for boolean parameters (anything with a "struct pin_config_item" where has_arg is false) the function expects that the function should return its value not through the "config" parameter but should return "0" if the value is set and "-EINVAL" if the value isn't set. Let's fix this. >From a quick sample of other pinctrl drivers, it appears to be tradition to also return 1 through the config parameter for these boolean parameters when they exist. I'm not one to knock tradition, so I'll follow tradition and return 1 in these cases. While I'm at it, I'll also continue searching for four leaf clovers, kocking on wood three times, and trying not to break mirrors. NOTE: This also fixes an apparent typo for reading PIN_CONFIG_BIAS_DISABLE where the old driver was accidentally using "=3D" instead of "=3D=3D" and thus was setting some internal state when you tried to query PIN_CONFIG_BIAS_DISABLE. Oops. Fixes: eadff3024472 ("pinctrl: Qualcomm SPMI PMIC GPIO pin controller drive= r") Signed-off-by: Douglas Anderson Signed-off-by: Linus Walleij Signed-off-by: Sasha Levin --- drivers/pinctrl/qcom/pinctrl-spmi-gpio.c | 32 ++++++++++++++++++------ 1 file changed, 24 insertions(+), 8 deletions(-) diff --git a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c b/drivers/pinctrl/qco= m/pinctrl-spmi-gpio.c index 6c42ca14d2fd..4ea810cafaac 100644 --- a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c +++ b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c @@ -291,31 +291,47 @@ static int pmic_gpio_config_get(struct pinctrl_dev *p= ctldev, =20 switch (param) { case PIN_CONFIG_DRIVE_PUSH_PULL: - arg =3D pad->buffer_type =3D=3D PMIC_GPIO_OUT_BUF_CMOS; + if (pad->buffer_type !=3D PMIC_GPIO_OUT_BUF_CMOS) + return -EINVAL; + arg =3D 1; break; case PIN_CONFIG_DRIVE_OPEN_DRAIN: - arg =3D pad->buffer_type =3D=3D PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS; + if (pad->buffer_type !=3D PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS) + return -EINVAL; + arg =3D 1; break; case PIN_CONFIG_DRIVE_OPEN_SOURCE: - arg =3D pad->buffer_type =3D=3D PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS; + if (pad->buffer_type !=3D PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS) + return -EINVAL; + arg =3D 1; break; case PIN_CONFIG_BIAS_PULL_DOWN: - arg =3D pad->pullup =3D=3D PMIC_GPIO_PULL_DOWN; + if (pad->pullup !=3D PMIC_GPIO_PULL_DOWN) + return -EINVAL; + arg =3D 1; break; case PIN_CONFIG_BIAS_DISABLE: - arg =3D pad->pullup =3D PMIC_GPIO_PULL_DISABLE; + if (pad->pullup !=3D PMIC_GPIO_PULL_DISABLE) + return -EINVAL; + arg =3D 1; break; case PIN_CONFIG_BIAS_PULL_UP: - arg =3D pad->pullup =3D=3D PMIC_GPIO_PULL_UP_30; + if (pad->pullup !=3D PMIC_GPIO_PULL_UP_30) + return -EINVAL; + arg =3D 1; break; case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: - arg =3D !pad->is_enabled; + if (pad->is_enabled) + return -EINVAL; + arg =3D 1; break; case PIN_CONFIG_POWER_SOURCE: arg =3D pad->power_source; break; case PIN_CONFIG_INPUT_ENABLE: - arg =3D pad->input_enabled; + if (!pad->input_enabled) + return -EINVAL; + arg =3D 1; break; case PIN_CONFIG_OUTPUT: arg =3D pad->out_value; --=20 2.17.1