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Sat, 15 Sep 2018 01:35:16 +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 01:35:16 +0000 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Douglas Anderson , Linus Walleij , Sasha Levin Subject: [PATCH AUTOSEL 4.9 34/34] pinctrl: qcom: spmi-gpio: Fix pmic_gpio_config_get() to be compliant Thread-Topic: [PATCH AUTOSEL 4.9 34/34] pinctrl: qcom: spmi-gpio: Fix pmic_gpio_config_get() to be compliant Thread-Index: AQHUTJRJmpSmwVKN1kCwweqYU+DHHw== Date: Sat, 15 Sep 2018 01:34:47 +0000 Message-ID: <20180915013422.180023-34-alexander.levin@microsoft.com> References: <20180915013422.180023-1-alexander.levin@microsoft.com> In-Reply-To: <20180915013422.180023-1-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;CY4PR21MB0181;6:9wJe9RahJ37pcjYMvGmlaJl1O0603acKA3MK0VQMmGvVO/O3SBz6wvq1YSPqlQ4uSABe5Y0rNmkzhExSa+HSyALOOgWyX8d0KsjvUe6zqaI57mUEq0ZrX7imRmYGpm7AM8KihWjXFCeW2T4oMNiqOJZkWWb7sD1GmaYPXl6POa9PHBOMf1g/RmfVvzIGxukVPgo2cOv5aHZmF6DX0rp6FkTvZKHYWxgefT1qg/baxmX41l7JzwAm/1KFn9fChveUIkR+hPmTnI3qjX9u90ap5VHPdStnGgkFVQrAmPrBHbIVBE/0pUqNEibt9Tap9CHi81LT4Q6Tcyu1gqRcL86ooJ7SwHeDXOb5AzE1zsWu+vM61MdITGo1dOlo+DNVpmCrY4KIVLXpJcsGfXF0zjRNzOH9yZ3NN35dJcGhA1LLPD9XurYwrg4pKKjprT8G8YbqJt90dMbfzG3lKV3fkZGp/Q==;5:a9LTS0EVfODuOg4J9T8VQaMGIotdEkAXEkhIGilffUPVFlLm+Tv1n7+3Msap3R2mEZTJxh7bcymWly0I7PT855DvDzG968V4FxBeKLCxw53sdbXoaWTz6ETPod7BTTAsaUPxp2aNlFTO6jj3X9diBjhUaav4rG5zC6Sbn6iZkfI=;7:eZcwl+ZUyApvJMA9fWtW/6boEd98N4ZLv2zLOVQkYKXHTuW7YYH/miwT+ve2GZc8+9FNqAbsIC7GxEfR7gv3JSmWB78J+Xd6MyJ4P/ZA27b2Hp4DMl+aQEwIqwfkbwNIJJRQ4feqe+Rjpz6fA/CSzxGqBDxXBND7lE2ojOH8OEVJ44g8TC0w0X3s/laiaUdJDxZCY9DvCtfmIAUyrLf8joagziqVr44XcbYq+bshJ9vcC6PavwUdu8b/7y8QqqYs x-ms-office365-filtering-correlation-id: b4e54151-b1f7-4c8a-3638-08d61aab7d95 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:CY4PR21MB0181; 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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: /ghSMTKT9jJjGi/fHfrNVhCsoXyVP1BNnGT+tP4Z2kqGmeAWkkumvWsK8vAezPMxTMOwkxJ2NXkYBrm0BV1ZD6m2DTEe30v+Xu2iTQLorS+8dPNBk7cw+v04CCYzDaB5n3TmMwgny+CUjCAqXVM97FiQr08sBphy6nY0wpY55TN64lOGFmn2OUdyTmXxriii6jevU11R9hktoDFP06iPutyKsdWn6EQUHpCS1i2GRYkBe3FCY5WYUXwqenAqAWqzWrrdpyDMuI1UdabH6AMEzI+YK+exQ+VpEzNjk/VD4hSj+XEHfVcbzrtJLgkkb6UTyy+VLdeXcdryB2Rnobr+jbulS06fD4gr3UreZcYYJI8= 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: b4e54151-b1f7-4c8a-3638-08d61aab7d95 X-MS-Exchange-CrossTenant-originalarrivaltime: 15 Sep 2018 01:34:47.5515 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR21MB0181 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 664b641fd776..8093afd17aa4 100644 --- a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c +++ b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c @@ -287,31 +287,47 @@ 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