From patchwork Mon Apr 15 08:50:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Peng Fan (OSS)" X-Patchwork-Id: 13629654 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3D19FC4345F for ; Mon, 15 Apr 2024 08:43:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Cc:To:In-Reply-To: References:Message-Id:Subject:Date:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=6Q2OiAX4hVLVNXSSFCyHodgVuZc6RpPw3qdU6QdJfEM=; b=bPyxFqXoZybgDBx7iJjd6xdC7O lPhX5S7knIyPoaXe/62xrf5DBVHdvsy7KcJePAXfJf+/bpzBBh/OHEgQjwcXoXruKeucrfCJ/919c GC+yZ6qoY+zTBT+njmrzokNhK0xuu3wU8wqKr/H7FMW9ICV1ZHbvPGaZVIzCglgh8OFKieV39q8Ap KLjR2D/USpx7TTsX0JMS4NoS/kuR4t1x3PvbLq3lHeywE8ctcvd/3VLKY3Rr7VIUuEmHcyYVH74AX zussjlrZ4NE5k6dGAkBMLB4yx1nRXperee0dvL1jGmzbYqBYHu0CYg2pXNbf0c0A8kxRyCSI8fQre tHhihE+w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rwHw6-00000007aNK-43Kf; Mon, 15 Apr 2024 08:43:34 +0000 Received: from mail-am0eur02on20600.outbound.protection.outlook.com ([2a01:111:f403:2606::600] helo=EUR02-AM0-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rwHvj-00000007a4V-2XYJ for linux-arm-kernel@lists.infradead.org; Mon, 15 Apr 2024 08:43:13 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=EDa+XzHAaZgpMqsBTwOFRImsJN2U90sKQaW4b91N5gSEvGOsVLHICvzY3dwaNDWsLVl91zyuf1KRhHEiY81hGDhbQTLZcLMCwYHZT8cYlIE05o7DfTEVPIbf6T9MlTQZxnnZgWAD1X0vsL3cJ6TetoagFVQ3MST1lsljKDmilYSRWza2BqbUQ9IamD2zs2smn/1we39ofSEX5KCBbigfYrP0OjCinCRf7N8SAeB2CEHIZsmeMv0DJF0a8eqPbgZeLAIaMukMoe5UTQhSq6wglgSKFz1nseBAtEk16HXWN3QaK7xrbQ2tSCc9KxteFqSYoSViQViM+j32EdB7pxvFSg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=vxmDk/2iSI+UsJu28/ANZ/il3ws1Kfhx5WW+Jf0xHt4=; b=Zz7xgtSNSc+FH88XZGepxJVn5Tqjsrre0QkIzbdglNc2Tdvbie50rW0z3DYd9e/PD2PEImiunrfhVM5rV7r/CJfnFvRPDk8p+uD3PuIPPyoGFpIvu9lD+ghP/likbWhYPTVWW53SvPPud6NpG4i87j5wSYijg5uC7Tno2LTr1dwCrRh6kY0g59N+3w4J7d+jjrw4/FvQZELvtsgdJdTiXnQ2N/hCFuThPbBqdXp3gFHz7BUwyYBiAD+QQx2xTbnA3be0SratJDvCZ/vuqrnB42D2kXXPJU1273psBJ7KnVSm6XhU1OmYgt+iPBpFew6dzqLGvGFJyEyacXJ8+9a4hg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oss.nxp.com; dmarc=pass action=none header.from=oss.nxp.com; dkim=pass header.d=oss.nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=NXP1.onmicrosoft.com; s=selector2-NXP1-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=vxmDk/2iSI+UsJu28/ANZ/il3ws1Kfhx5WW+Jf0xHt4=; b=iZLFVl7npbn1Khe0XUBL9p04eGiTDuBz534VdBH8SUtuFmKS1z3dV42KgulSBJIKmy28sJpX/no0GEkru9pnpiPS8ZbzS7eA73o0Knpkx7uiwlKEjNDPI42+kpQEVvpMkll6K5MjhgfvuDm3pLEFjE2rE2HGR94uukWtuI08Nbg= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=oss.nxp.com; Received: from DU0PR04MB9417.eurprd04.prod.outlook.com (2603:10a6:10:358::11) by AM9PR04MB7506.eurprd04.prod.outlook.com (2603:10a6:20b:281::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7452.50; Mon, 15 Apr 2024 08:43:07 +0000 Received: from DU0PR04MB9417.eurprd04.prod.outlook.com ([fe80::d30b:44e7:e78e:662d]) by DU0PR04MB9417.eurprd04.prod.outlook.com ([fe80::d30b:44e7:e78e:662d%4]) with mapi id 15.20.7452.041; Mon, 15 Apr 2024 08:43:07 +0000 From: "Peng Fan (OSS)" Date: Mon, 15 Apr 2024 16:50:52 +0800 Subject: [PATCH v10 4/4] pinctrl: Implementation of the generic scmi-pinctrl driver Message-Id: <20240415-pinctrl-scmi-v10-4-59c6e7a586ee@nxp.com> References: <20240415-pinctrl-scmi-v10-0-59c6e7a586ee@nxp.com> In-Reply-To: <20240415-pinctrl-scmi-v10-0-59c6e7a586ee@nxp.com> To: Sudeep Holla , Cristian Marussi , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Linus Walleij , Dan Carpenter Cc: Dhruva Gole , Andy Shevchenko , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-gpio@vger.kernel.org, Peng Fan , Oleksii Moisieiev X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1713171062; l=18530; i=peng.fan@nxp.com; s=20230812; h=from:subject:message-id; bh=IOtzx+YMGFm2KwYZUPsN0IKPwxoPPQzwf7S9Idob8PY=; b=TDKDJBMyJqWgKdpXkEyMIVG5reXKpC9Ze1YguHscePhoz72v/EEo/GYdZfyDYKZ7qXukS8pBx Kw2w24gH90wAsis3+rPU1mSocKFc81NwgxWcYm6DyHtC+9xtVuH9k8g X-Developer-Key: i=peng.fan@nxp.com; a=ed25519; pk=I4sJg7atIT1g63H7bb5lDRGR2gJW14RKDD0wFL8TT1g= X-ClientProxiedBy: SG2PR02CA0011.apcprd02.prod.outlook.com (2603:1096:3:17::23) To DU0PR04MB9417.eurprd04.prod.outlook.com (2603:10a6:10:358::11) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DU0PR04MB9417:EE_|AM9PR04MB7506:EE_ X-MS-Office365-Filtering-Correlation-Id: 245d0cc5-ca46-446f-6d19-08dc5d2812d1 X-MS-Exchange-SharedMailbox-RoutingAgent-Processed: True X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DU0PR04MB9417.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230031)(1800799015)(7416005)(52116005)(376005)(366007)(38350700005);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?q?kOhdqVzywnU4tCt1UiLMyxrIukZp?= =?utf-8?q?/PDqrqjSlSq6Njsjb0iVBmUX6VogXNLcrVrpOYVPgTrOFmaROIYvuDcx6loQljCio?= =?utf-8?q?r9awgFbB+94gdIQkWix/Apn2ZvZoZf8MDO/89+4Y5ZdOL0ZkuXEPaBdj7oMPYKN2Y?= =?utf-8?q?8bZOjx6Dn1/M+pHUAo4pCVBRwRfA4V6/TjKhzjO0JWnDHZSvSUPEeKgCc1OO6Rhfq?= =?utf-8?q?oGK4Kp2ZrZRqlF8lBrWyJvATJ0N7Qpry7Gh2l8oxkg85/CwsZNJBEll+HSYRbkh3X?= =?utf-8?q?CEIhp8eX9EXxXoQGV26yLz2inHy8rZwg2KWtvWwoVtFCg436e2sQqc1JlHCEhqo/k?= =?utf-8?q?+l+5tANzIEZ5D6z3979itjxHFDDmHRa8cW9lq8u4zFF9JkmIMmk73StUoITqOE9Yo?= =?utf-8?q?+5y+euc0AxL6qvvh88YSXKMKk8IrLrQLzO0M+PIul3C+5/McoJLUXlB0fWlF/OnAK?= =?utf-8?q?0i3jKoYNB29ZrSbT25xMtzv3ZUTS2KUwulh2MISYQBEKPkek3vIM0r7lhxVROOD41?= =?utf-8?q?a83zxFky2ayE2zCp4NWyAUUdYCp4WwG7DNiV4fiCYBvWJDgcYtG1M9jIzqYuUYnH4?= =?utf-8?q?FN5l0ZLvIiDLdv1o0J82KZgkIqMFOCkvfMCcCLcmE21uv0k1ieL6ZBlxhBGW4Co9g?= =?utf-8?q?+UhwC+A4ToFcwb9s/9nOKIh/jFHUuG3dqwDlAmt2LT+aHLjlEJX6doVxffAdIuQWy?= =?utf-8?q?HbYriooYPvFReiu0IVekfVH7+jQsOEqwuq92w3LfBcHoRZ1mOH54Dj5946tb4J4Pr?= =?utf-8?q?DD9RoYamGXQM+waP/aSkeUY9Y6fdKr05L7i0rxWPhWLqam79RsHCSnlHS9u9+7W40?= =?utf-8?q?wMXm+5Jd/Il81JhKENSgUeq67vZEfJBbPgzDuWLeJpgxvEJrxb4g6maq0iPvE25WX?= =?utf-8?q?7Wue81VbSzRF15EZbHKtK3h6am8coK7Z9avNh5tV6sXQfOnXLcZp4svDRVP43iIRv?= =?utf-8?q?Nc4uKJ39lyEJwiKwA99Slx11TnvFVrg0ZSjQUwxQiqySlXEfOiz9N4+hZhPS7wPJh?= =?utf-8?q?NGykOWthXNxyTHLdM7akn7HJbogvbJ5E0Wm994ZARFE6nLUHSzIl+uphXdkPSRyy3?= =?utf-8?q?zE4VyInqRcE8+fZ4q6GSvgvrnckhYt3plnhdtItcmcQxS2A+tcNsBqgyUTEsyVsFq?= =?utf-8?q?YDDdSL+dQfg81/gQx0f2+A2iwSEM3Ful2s2dbFNNz3vZpCCFacAKXYzCMZta1FrPu?= =?utf-8?q?SMaJcfOG2DN5l/GEqKEY5RrxLQ0B42Tybltvceo8Rjrs21Fy8Eol7wTQYDZNfm4fJ?= =?utf-8?q?Xxvpp135IQWWFgFI/eQDODxZ1GsF0EE4kKs/WcqtS427ALim+yl6cop35Q89YhLe3?= =?utf-8?q?7Ir0CvQ1LZXRYuzfc0k7+W6yF8xDaxBibU3ZbCcXG0WpQh5c1G5Xl/mkunF66u1+W?= =?utf-8?q?/mgKNzpQmtj8jgNeNeU36zP4lnmhRpn7gpPNgmoyuXQWc4QHXGTIC1VdrP7DpBLCv?= =?utf-8?q?JfVBSZ7mc2rVnwE1nscXHJvzh+emPpRkJMX9xvAVt95p5MKtRxrcanWoURbb00jRV?= =?utf-8?q?uD8mit9rGdYA?= X-OriginatorOrg: oss.nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 245d0cc5-ca46-446f-6d19-08dc5d2812d1 X-MS-Exchange-CrossTenant-AuthSource: DU0PR04MB9417.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Apr 2024 08:43:07.6959 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: Z1ntymxtmttbz/pYt6mTvGHs8IYzu4gzrVt5lAe3uL9p1yidmd0PJEshJVxTbJFC+RAwtKHNqgdnQNmxP6S/Ww== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM9PR04MB7506 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240415_014311_751597_37055A2A X-CRM114-Status: GOOD ( 18.60 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Peng Fan scmi-pinctrl driver implements pinctrl driver interface and using SCMI protocol to redirect messages from pinctrl subsystem SDK to SCMI platform firmware, which does the changes in HW. Co-developed-by: Oleksii Moisieiev Signed-off-by: Oleksii Moisieiev Reviewed-by: Dhruva Gole Signed-off-by: Peng Fan Reviewed-by: Andy Shevchenko --- MAINTAINERS | 1 + drivers/pinctrl/Kconfig | 11 + drivers/pinctrl/Makefile | 1 + drivers/pinctrl/pinctrl-scmi.c | 572 +++++++++++++++++++++++++++++++++++++++++ 4 files changed, 585 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index b1b074ce2cf3..a37aaff190c7 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -21615,6 +21615,7 @@ F: drivers/cpufreq/sc[mp]i-cpufreq.c F: drivers/firmware/arm_scmi/ F: drivers/firmware/arm_scpi.c F: drivers/hwmon/scmi-hwmon.c +F: drivers/pinctrl/pinctrl-scmi.c F: drivers/pmdomain/arm/ F: drivers/powercap/arm_scmi_powercap.c F: drivers/regulator/scmi-regulator.c diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index 1be05efccc29..7e4f93a3bc7a 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -450,6 +450,17 @@ config PINCTRL_ROCKCHIP help This support pinctrl and GPIO driver for Rockchip SoCs. +config PINCTRL_SCMI + tristate "Pinctrl driver using SCMI protocol interface" + depends on ARM_SCMI_PROTOCOL || COMPILE_TEST + select PINMUX + select GENERIC_PINCONF + help + This driver provides support for pinctrl which is controlled + by firmware that implements the SCMI interface. + It uses SCMI Message Protocol to interact with the + firmware providing all the pinctrl controls. + config PINCTRL_SINGLE tristate "One-register-per-pin type device tree based pinctrl driver" depends on OF diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index 2152539b53d5..cc809669405a 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -45,6 +45,7 @@ obj-$(CONFIG_PINCTRL_PIC32) += pinctrl-pic32.o obj-$(CONFIG_PINCTRL_PISTACHIO) += pinctrl-pistachio.o obj-$(CONFIG_PINCTRL_RK805) += pinctrl-rk805.o obj-$(CONFIG_PINCTRL_ROCKCHIP) += pinctrl-rockchip.o +obj-$(CONFIG_PINCTRL_SCMI) += pinctrl-scmi.o obj-$(CONFIG_PINCTRL_SINGLE) += pinctrl-single.o obj-$(CONFIG_PINCTRL_ST) += pinctrl-st.o obj-$(CONFIG_PINCTRL_STMFX) += pinctrl-stmfx.o diff --git a/drivers/pinctrl/pinctrl-scmi.c b/drivers/pinctrl/pinctrl-scmi.c new file mode 100644 index 000000000000..accebe3f0706 --- /dev/null +++ b/drivers/pinctrl/pinctrl-scmi.c @@ -0,0 +1,572 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * System Control and Power Interface (SCMI) Protocol based pinctrl driver + * + * Copyright (C) 2024 EPAM + * Copyright 2024 NXP + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#include "pinctrl-utils.h" +#include "core.h" +#include "pinconf.h" + +#define DRV_NAME "scmi-pinctrl" + +/* Define num configs, if not large than 4 use stack, else use kcalloc */ +#define SCMI_NUM_CONFIGS 4 + +static const struct scmi_pinctrl_proto_ops *pinctrl_ops; + +struct scmi_pinctrl { + struct device *dev; + struct scmi_protocol_handle *ph; + struct pinctrl_dev *pctldev; + struct pinctrl_desc pctl_desc; + struct pinfunction *functions; + unsigned int nr_functions; + struct pinctrl_pin_desc *pins; + unsigned int nr_pins; +}; + +static int pinctrl_scmi_get_groups_count(struct pinctrl_dev *pctldev) +{ + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + return pinctrl_ops->count_get(pmx->ph, GROUP_TYPE); +} + +static const char *pinctrl_scmi_get_group_name(struct pinctrl_dev *pctldev, + unsigned int selector) +{ + int ret; + const char *name; + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + ret = pinctrl_ops->name_get(pmx->ph, selector, GROUP_TYPE, &name); + if (ret) { + dev_err(pmx->dev, "get name failed with err %d", ret); + return NULL; + } + + return name; +} + +static int pinctrl_scmi_get_group_pins(struct pinctrl_dev *pctldev, + unsigned int selector, + const unsigned int **pins, + unsigned int *num_pins) +{ + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + return pinctrl_ops->group_pins_get(pmx->ph, selector, pins, num_pins); +} + +static const struct pinctrl_ops pinctrl_scmi_pinctrl_ops = { + .get_groups_count = pinctrl_scmi_get_groups_count, + .get_group_name = pinctrl_scmi_get_group_name, + .get_group_pins = pinctrl_scmi_get_group_pins, +#ifdef CONFIG_OF + .dt_node_to_map = pinconf_generic_dt_node_to_map_all, + .dt_free_map = pinconf_generic_dt_free_map, +#endif +}; + +static int pinctrl_scmi_get_functions_count(struct pinctrl_dev *pctldev) +{ + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + return pinctrl_ops->count_get(pmx->ph, FUNCTION_TYPE); +} + +static const char *pinctrl_scmi_get_function_name(struct pinctrl_dev *pctldev, + unsigned int selector) +{ + int ret; + const char *name; + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + ret = pinctrl_ops->name_get(pmx->ph, selector, FUNCTION_TYPE, &name); + if (ret) { + dev_err(pmx->dev, "get name failed with err %d", ret); + return NULL; + } + + return name; +} + +static int pinctrl_scmi_get_function_groups(struct pinctrl_dev *pctldev, + unsigned int selector, + const char * const **p_groups, + unsigned int * const p_num_groups) +{ + struct pinfunction *func; + const unsigned int *group_ids; + unsigned int num_groups; + const char **groups; + int ret, i; + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + if (!p_groups || !p_num_groups) + return -EINVAL; + + if (selector >= pmx->nr_functions) + return -EINVAL; + + func = &pmx->functions[selector]; + if (func->ngroups) + goto done; + + ret = pinctrl_ops->function_groups_get(pmx->ph, selector, &num_groups, + &group_ids); + if (ret) { + dev_err(pmx->dev, "Unable to get function groups, err %d", ret); + return ret; + } + if (!num_groups) + return -EINVAL; + + groups = kcalloc(num_groups, sizeof(*groups), GFP_KERNEL); + if (!groups) + return -ENOMEM; + + for (i = 0; i < num_groups; i++) { + groups[i] = pinctrl_scmi_get_group_name(pctldev, group_ids[i]); + if (!groups[i]) { + ret = -EINVAL; + goto err_free; + } + } + + func->ngroups = num_groups; + func->groups = groups; +done: + *p_groups = func->groups; + *p_num_groups = func->ngroups; + + return 0; + +err_free: + kfree(groups); + + return ret; +} + +static int pinctrl_scmi_func_set_mux(struct pinctrl_dev *pctldev, + unsigned int selector, unsigned int group) +{ + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + return pinctrl_ops->mux_set(pmx->ph, selector, group); +} + +static int pinctrl_scmi_request(struct pinctrl_dev *pctldev, + unsigned int offset) +{ + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + return pinctrl_ops->pin_request(pmx->ph, offset); +} + +static int pinctrl_scmi_free(struct pinctrl_dev *pctldev, unsigned int offset) +{ + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + return pinctrl_ops->pin_free(pmx->ph, offset); +} + +static const struct pinmux_ops pinctrl_scmi_pinmux_ops = { + .request = pinctrl_scmi_request, + .free = pinctrl_scmi_free, + .get_functions_count = pinctrl_scmi_get_functions_count, + .get_function_name = pinctrl_scmi_get_function_name, + .get_function_groups = pinctrl_scmi_get_function_groups, + .set_mux = pinctrl_scmi_func_set_mux, +}; + +static int pinctrl_scmi_map_pinconf_type(enum pin_config_param param, + enum scmi_pinctrl_conf_type *type) +{ + u32 arg = param; + + switch (arg) { + case PIN_CONFIG_BIAS_BUS_HOLD: + *type = SCMI_PIN_BIAS_BUS_HOLD; + break; + case PIN_CONFIG_BIAS_DISABLE: + *type = SCMI_PIN_BIAS_DISABLE; + break; + case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: + *type = SCMI_PIN_BIAS_HIGH_IMPEDANCE; + break; + case PIN_CONFIG_BIAS_PULL_DOWN: + *type = SCMI_PIN_BIAS_PULL_DOWN; + break; + case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT: + *type = SCMI_PIN_BIAS_PULL_DEFAULT; + break; + case PIN_CONFIG_BIAS_PULL_UP: + *type = SCMI_PIN_BIAS_PULL_UP; + break; + case PIN_CONFIG_DRIVE_OPEN_DRAIN: + *type = SCMI_PIN_DRIVE_OPEN_DRAIN; + break; + case PIN_CONFIG_DRIVE_OPEN_SOURCE: + *type = SCMI_PIN_DRIVE_OPEN_SOURCE; + break; + case PIN_CONFIG_DRIVE_PUSH_PULL: + *type = SCMI_PIN_DRIVE_PUSH_PULL; + break; + case PIN_CONFIG_DRIVE_STRENGTH: + *type = SCMI_PIN_DRIVE_STRENGTH; + break; + case PIN_CONFIG_DRIVE_STRENGTH_UA: + *type = SCMI_PIN_DRIVE_STRENGTH; + break; + case PIN_CONFIG_INPUT_DEBOUNCE: + *type = SCMI_PIN_INPUT_DEBOUNCE; + break; + case PIN_CONFIG_INPUT_ENABLE: + *type = SCMI_PIN_INPUT_MODE; + break; + case PIN_CONFIG_INPUT_SCHMITT: + *type = SCMI_PIN_INPUT_SCHMITT; + break; + case PIN_CONFIG_INPUT_SCHMITT_ENABLE: + *type = SCMI_PIN_INPUT_MODE; + break; + case PIN_CONFIG_MODE_LOW_POWER: + *type = SCMI_PIN_LOW_POWER_MODE; + break; + case PIN_CONFIG_OUTPUT: + *type = SCMI_PIN_OUTPUT_VALUE; + break; + case PIN_CONFIG_OUTPUT_ENABLE: + *type = SCMI_PIN_OUTPUT_MODE; + break; + case PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS: + *type = SCMI_PIN_OUTPUT_VALUE; + break; + case PIN_CONFIG_POWER_SOURCE: + *type = SCMI_PIN_POWER_SOURCE; + break; + case PIN_CONFIG_SLEW_RATE: + *type = SCMI_PIN_SLEW_RATE; + break; + case SCMI_PIN_OEM_START ... SCMI_PIN_OEM_END: + *type = arg; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int pinctrl_scmi_pinconf_get(struct pinctrl_dev *pctldev, + unsigned int pin, unsigned long *config) +{ + int ret; + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + enum pin_config_param config_type; + enum scmi_pinctrl_conf_type type; + u32 config_value; + + if (!config) + return -EINVAL; + + config_type = pinconf_to_config_param(*config); + + ret = pinctrl_scmi_map_pinconf_type(config_type, &type); + if (ret) + return ret; + + ret = pinctrl_ops->settings_get_one(pmx->ph, pin, PIN_TYPE, type, + &config_value); + if (ret) { + /* Convert SCMI error code to PINCTRL expected error code */ + if (ret == -EOPNOTSUPP) + ret = -ENOTSUPP; + return ret; + } + + *config = pinconf_to_config_packed(config_type, config_value); + + return 0; +} + +static int +pinctrl_scmi_alloc_configs(struct pinctrl_dev *pctldev, u32 num_configs, + u32 **p_config_value, + enum scmi_pinctrl_conf_type **p_config_type) +{ + if (num_configs <= SCMI_NUM_CONFIGS) + return 0; + + *p_config_value = kcalloc(num_configs, sizeof(**p_config_value), GFP_KERNEL); + if (!*p_config_value) + return -ENOMEM; + + *p_config_type = kcalloc(num_configs, sizeof(**p_config_type), GFP_KERNEL); + if (!*p_config_type) { + kfree(*p_config_value); + return -ENOMEM; + } + + return 0; +} + +static void +pinctrl_scmi_free_configs(struct pinctrl_dev *pctldev, u32 num_configs, + u32 **p_config_value, + enum scmi_pinctrl_conf_type **p_config_type) +{ + if (num_configs <= SCMI_NUM_CONFIGS) + return; + + kfree(*p_config_value); + kfree(*p_config_type); +} + +static int pinctrl_scmi_pinconf_set(struct pinctrl_dev *pctldev, + unsigned int pin, + unsigned long *configs, + unsigned int num_configs) +{ + int i, ret; + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + enum scmi_pinctrl_conf_type config_type[SCMI_NUM_CONFIGS]; + u32 config_value[SCMI_NUM_CONFIGS]; + enum scmi_pinctrl_conf_type *p_config_type = config_type; + u32 *p_config_value = config_value; + enum pin_config_param param; + + if (!configs || !num_configs) + return -EINVAL; + + ret = pinctrl_scmi_alloc_configs(pctldev, num_configs, &p_config_type, + &p_config_value); + if (ret) + return ret; + + for (i = 0; i < num_configs; i++) { + param = pinconf_to_config_param(configs[i]); + ret = pinctrl_scmi_map_pinconf_type(param, &p_config_type[i]); + if (ret) { + dev_err(pmx->dev, "Error map pinconf_type %d\n", ret); + goto free_config; + } + p_config_value[i] = pinconf_to_config_argument(configs[i]); + } + + ret = pinctrl_ops->settings_conf(pmx->ph, pin, PIN_TYPE, num_configs, + p_config_type, p_config_value); + if (ret) + dev_err(pmx->dev, "Error parsing config %d\n", ret); + +free_config: + pinctrl_scmi_free_configs(pctldev, num_configs, &p_config_type, + &p_config_value); + return ret; +} + +static int pinctrl_scmi_pinconf_group_set(struct pinctrl_dev *pctldev, + unsigned int group, + unsigned long *configs, + unsigned int num_configs) +{ + int i, ret; + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + enum scmi_pinctrl_conf_type config_type[SCMI_NUM_CONFIGS]; + u32 config_value[SCMI_NUM_CONFIGS]; + enum scmi_pinctrl_conf_type *p_config_type = config_type; + u32 *p_config_value = config_value; + enum pin_config_param param; + + if (!configs || !num_configs) + return -EINVAL; + + ret = pinctrl_scmi_alloc_configs(pctldev, num_configs, &p_config_type, + &p_config_value); + if (ret) + return ret; + + for (i = 0; i < num_configs; i++) { + param = pinconf_to_config_param(configs[i]); + ret = pinctrl_scmi_map_pinconf_type(param, &p_config_type[i]); + if (ret) { + dev_err(pmx->dev, "Error map pinconf_type %d\n", ret); + goto free_config; + } + + p_config_value[i] = pinconf_to_config_argument(configs[i]); + } + + ret = pinctrl_ops->settings_conf(pmx->ph, group, GROUP_TYPE, + num_configs, p_config_type, + p_config_value); + if (ret) + dev_err(pmx->dev, "Error parsing config %d", ret); + +free_config: + pinctrl_scmi_free_configs(pctldev, num_configs, &p_config_type, + &p_config_value); + return ret; +}; + +static int pinctrl_scmi_pinconf_group_get(struct pinctrl_dev *pctldev, + unsigned int group, + unsigned long *config) +{ + int ret; + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + enum pin_config_param config_type; + enum scmi_pinctrl_conf_type type; + u32 config_value; + + if (!config) + return -EINVAL; + + config_type = pinconf_to_config_param(*config); + ret = pinctrl_scmi_map_pinconf_type(config_type, &type); + if (ret) { + dev_err(pmx->dev, "Error map pinconf_type %d\n", ret); + return ret; + } + + ret = pinctrl_ops->settings_get_one(pmx->ph, group, GROUP_TYPE, type, + &config_value); + if (ret) { + /* Convert SCMI error code to PINCTRL expected error code */ + if (ret == -EOPNOTSUPP) + ret = -ENOTSUPP; + return ret; + } + + *config = pinconf_to_config_packed(config_type, config_value); + + return 0; +} + +static const struct pinconf_ops pinctrl_scmi_pinconf_ops = { + .is_generic = true, + .pin_config_get = pinctrl_scmi_pinconf_get, + .pin_config_set = pinctrl_scmi_pinconf_set, + .pin_config_group_set = pinctrl_scmi_pinconf_group_set, + .pin_config_group_get = pinctrl_scmi_pinconf_group_get, + .pin_config_config_dbg_show = pinconf_generic_dump_config, +}; + +static int pinctrl_scmi_get_pins(struct scmi_pinctrl *pmx, + struct pinctrl_desc *desc) +{ + struct pinctrl_pin_desc *pins; + unsigned int npins; + int ret, i; + + npins = pinctrl_ops->count_get(pmx->ph, PIN_TYPE); + /* + * npins will never be zero, the scmi pinctrl driver has bailed out + * if npins is zero. + */ + pins = devm_kmalloc_array(pmx->dev, npins, sizeof(*pins), GFP_KERNEL); + if (!pins) + return -ENOMEM; + + for (i = 0; i < npins; i++) { + pins[i].number = i; + /* + * The memory for name is handled by the scmi firmware driver, + * no need free here + */ + ret = pinctrl_ops->name_get(pmx->ph, i, PIN_TYPE, &pins[i].name); + if (ret) + return dev_err_probe(pmx->dev, ret, + "Can't get name for pin %d", i); + } + + desc->npins = npins; + desc->pins = pins; + dev_dbg(pmx->dev, "got pins %u", npins); + + return 0; +} + +static int scmi_pinctrl_probe(struct scmi_device *sdev) +{ + int ret; + struct device *dev = &sdev->dev; + struct scmi_pinctrl *pmx; + const struct scmi_handle *handle; + struct scmi_protocol_handle *ph; + + if (!sdev->handle) + return -EINVAL; + + handle = sdev->handle; + + pinctrl_ops = handle->devm_protocol_get(sdev, SCMI_PROTOCOL_PINCTRL, &ph); + if (IS_ERR(pinctrl_ops)) + return PTR_ERR(pinctrl_ops); + + pmx = devm_kzalloc(dev, sizeof(*pmx), GFP_KERNEL); + if (!pmx) + return -ENOMEM; + + pmx->ph = ph; + + pmx->dev = dev; + pmx->pctl_desc.name = DRV_NAME; + pmx->pctl_desc.owner = THIS_MODULE; + pmx->pctl_desc.pctlops = &pinctrl_scmi_pinctrl_ops; + pmx->pctl_desc.pmxops = &pinctrl_scmi_pinmux_ops; + pmx->pctl_desc.confops = &pinctrl_scmi_pinconf_ops; + + ret = pinctrl_scmi_get_pins(pmx, &pmx->pctl_desc); + if (ret) + return ret; + + ret = devm_pinctrl_register_and_init(dev, &pmx->pctl_desc, pmx, + &pmx->pctldev); + if (ret) + return dev_err_probe(dev, ret, "Failed to register pinctrl\n"); + + pmx->nr_functions = pinctrl_scmi_get_functions_count(pmx->pctldev); + pmx->functions = devm_kcalloc(dev, pmx->nr_functions, + sizeof(*pmx->functions), GFP_KERNEL); + if (!pmx->functions) + return -ENOMEM; + + return pinctrl_enable(pmx->pctldev); +} + +static const struct scmi_device_id scmi_id_table[] = { + { SCMI_PROTOCOL_PINCTRL, "pinctrl" }, + { } +}; +MODULE_DEVICE_TABLE(scmi, scmi_id_table); + +static struct scmi_driver scmi_pinctrl_driver = { + .name = DRV_NAME, + .probe = scmi_pinctrl_probe, + .id_table = scmi_id_table, +}; +module_scmi_driver(scmi_pinctrl_driver); + +MODULE_AUTHOR("Oleksii Moisieiev "); +MODULE_AUTHOR("Peng Fan "); +MODULE_DESCRIPTION("ARM SCMI pin controller driver"); +MODULE_LICENSE("GPL");