From patchwork Thu Nov 10 01:42:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andre Przywara X-Patchwork-Id: 17896 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:6687:0:0:0:0:0 with SMTP id l7csp667656wru; Wed, 9 Nov 2022 17:46:34 -0800 (PST) X-Google-Smtp-Source: AMsMyM6eOyiw8LGMxEBomMTB7oDbtlFsFUgMwDX8PPZobGKGejkKbS/n8ATpC9DYMeWQ0pnQw9GH X-Received: by 2002:a17:90a:ae17:b0:213:cb58:e43e with SMTP id t23-20020a17090aae1700b00213cb58e43emr58686882pjq.141.1668044794187; Wed, 09 Nov 2022 17:46:34 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1668044794; cv=none; d=google.com; s=arc-20160816; b=KCdpBuQDq9CmtS542PjyO2TTp3PTaUQou+L9a+LtEygY7xc3RKeJGywFk8YHDaUNE6 xDjEHHuRmDQFmwPu2w9jc33eyDKzPN433jd+7R455k25JQIdm1QYtNbxBP8uuf8syKV/ 2Apn6577HLyGatnAz3NzHW/iq8EWv4FyXlzSY3nFbV+DXJimJI4LF/kZgvd31aWPj+Tw fF+gX0co4JNOCq3Bp23OIJhQ2fN8vg8Nu+Azhv/F4ZtaWy4f+lJQR1PJVqr5DgE7sdNk mxVqwztUl9Qg/qugClzbLAJTukn1kob/LYf/LXM0r0CZxQ2LojU/VXcBWKw7xc1qjsud 46Mg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=oj1CbILvmfoRaSg2Bm5Zmt7cakPw42b/eMj9eIemBa4=; b=jQXzVEYmqWxXWbzQF/LadqTA9YU6pepPyJ4Mk6xIilXWRFrjE1oU/04r+9zHO4ijje RltVLUr/HwTnKSafOYZQ6dnh3v4g2/6mbAPJ3WXcS4HnUFk7HWlVFBI4KcGzx3z9xxi+ cRwBgp9xZ03ZmktSPmt0bW6WNFWT1GGmXUt9/y+tVwzNDKlLGtjWN0qtx7Zvsp5jY3tX mUgSg844+LC52/EtWqLDkXggWmkQ9PTTyn4c4iyVOfEEuwLi2miIML1Kl38iFbOhR54P wiHmnqaVuExELevzqlBfbAptojockIDUfJW2j+2MKptOpYuiOH3lANiRfNeQuZKZWKAQ fmCA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id jb6-20020a170903258600b0017e20ec5490si15676048plb.301.2022.11.09.17.46.21; Wed, 09 Nov 2022 17:46:34 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231863AbiKJBo0 (ORCPT + 99 others); Wed, 9 Nov 2022 20:44:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42752 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231769AbiKJBoZ (ORCPT ); Wed, 9 Nov 2022 20:44:25 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id DD11E275E2; Wed, 9 Nov 2022 17:44:23 -0800 (PST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id D1E6923A; Wed, 9 Nov 2022 17:44:29 -0800 (PST) Received: from slackpad.fritz.box (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 046623F703; Wed, 9 Nov 2022 17:44:21 -0800 (PST) From: Andre Przywara To: Linus Walleij , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland Cc: Icenowy Zheng , linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev Subject: [RFC PATCH 1/2] pinctrl: sunxi: allow reading mux values from DT Date: Thu, 10 Nov 2022 01:42:54 +0000 Message-Id: <20221110014255.20711-2-andre.przywara@arm.com> X-Mailer: git-send-email 2.35.5 In-Reply-To: <20221110014255.20711-1-andre.przywara@arm.com> References: <20221110014255.20711-1-andre.przywara@arm.com> MIME-Version: 1.0 X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1749071738228524239?= X-GMAIL-MSGID: =?utf-8?q?1749071738228524239?= So far every Allwinner SoC needs a large table in the kernel code, to describe the mapping between the pinctrl function names ("uart") and the actual pincontroller mux value to be written into the registers. This adds a lot of data into a single image kernel, and also looks somewhat weird, as the DT can easily store the mux value. Add some code that allows to avoid that table: the struct that describes the existing pins will be build at *runtime*, based on very basic information provided by the respective SoC's pinctrl driver. This consists of the number of pins per bank, plus information which bank provides IRQ support, along with the mux value to use for that. The code will then iterate over all children of the pincontroller DT node (which describe each pin group), and populate that struct with the mapping between function names and mux values. The only thing that needs adding in the DT is a property with that value, per pin group. When this table is built, it will be handed over to the existing sunxi pinctrl driver, which cannot tell a difference between a hardcoded struct and this new one built at runtime. It will take care of registering the pinctrl device with the pinctrl subsystem. All a new SoC driver would need to do is to provide two arrays, and then call the sunxi_pinctrl_dt_table_init() function. Signed-off-by: Andre Przywara --- drivers/pinctrl/sunxi/Makefile | 1 + drivers/pinctrl/sunxi/pinctrl-sunxi-dt.c | 355 +++++++++++++++++++++++ drivers/pinctrl/sunxi/pinctrl-sunxi.h | 8 + 3 files changed, 364 insertions(+) create mode 100644 drivers/pinctrl/sunxi/pinctrl-sunxi-dt.c diff --git a/drivers/pinctrl/sunxi/Makefile b/drivers/pinctrl/sunxi/Makefile index 2ff5a55927ad..f5bad7a52951 100644 --- a/drivers/pinctrl/sunxi/Makefile +++ b/drivers/pinctrl/sunxi/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 # Core obj-y += pinctrl-sunxi.o +obj-y += pinctrl-sunxi-dt.o # SoC Drivers obj-$(CONFIG_PINCTRL_SUNIV_F1C100S) += pinctrl-suniv-f1c100s.o diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi-dt.c b/drivers/pinctrl/sunxi/pinctrl-sunxi-dt.c new file mode 100644 index 000000000000..a0e1e0ba5447 --- /dev/null +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi-dt.c @@ -0,0 +1,355 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2017-2022 ARM Ltd. + * + * Generic DT driven Allwinner pinctrl driver routines. + * Builds the pin tables from minimal driver information and pin groups + * described in the DT. Then hands those tables of to the traditional + * sunxi pinctrl driver. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "pinctrl-sunxi.h" + +#define INVALID_MUX 0xff + +/* + * Return the "index"th element from the "pinmux" property. If the property + * does not hold enough entries, return the last one instead. + * For almost every group the pinmux value is actually the same, so this + * allows to just list one value in the property. + */ +static u8 sunxi_pinctrl_dt_read_pinmux(const struct device_node *node, + int index) +{ + int ret, num_elems; + u32 value; + + num_elems = of_property_count_u32_elems(node, "pinmux"); + if (num_elems <= 0) + return INVALID_MUX; + + if (index >= num_elems) + index = num_elems - 1; + + ret = of_property_read_u32_index(node, "pinmux", index, &value); + if (ret) + return INVALID_MUX; + + return value; +} + +/* + * Allocate a table with a sunxi_desc_pin structure for every pin needed. + * Fills in the respective pin names ("PA0") and their pin numbers. + * Returns the pins array. We cannot use the member in *desc yet, as this + * is marked as const, and we will need to change the array still. + */ +static struct sunxi_desc_pin *init_pins_table(struct device *dev, + const u8 *pins_per_bank, + struct sunxi_pinctrl_desc *desc) +{ + struct sunxi_desc_pin *pins, *cur_pin; + int name_size = 0; + int port_base = desc->pin_base / PINS_PER_BANK; + char *pin_names, *cur_name; + int i, j; + + /* + * Find the total number of pins. + * Also work out how much memory we need to store all the pin names. + */ + for (i = 0; i < SUNXI_PINCTRL_MAX_BANKS; i++) { + desc->npins += pins_per_bank[i]; + if (pins_per_bank[i] < 10) { + /* 4 bytes for "PXy\0" */ + name_size += pins_per_bank[i] * 4; + } else { + /* 4 bytes for each "PXy\0" */ + name_size += 10 * 4; + + /* 5 bytes for each "PXyy\0" */ + name_size += (pins_per_bank[i] - 10) * 5; + } + } + + if (desc->npins == 0) { + dev_err(dev, "no ports defined\n"); + return ERR_PTR(-EINVAL); + } + + pins = devm_kzalloc(dev, desc->npins * sizeof(*pins), GFP_KERNEL); + if (!pins) + return ERR_PTR(-ENOMEM); + + /* Allocate memory to store the name for every pin. */ + pin_names = devm_kmalloc(dev, name_size, GFP_KERNEL); + if (!pin_names) + return ERR_PTR(-ENOMEM); + + /* Fill the pins array with the name and the number for each pin. */ + cur_name = pin_names; + cur_pin = pins; + for (i = 0; i < SUNXI_PINCTRL_MAX_BANKS; i++) { + for (j = 0; j < pins_per_bank[i]; j++, cur_pin++) { + int nchars = sprintf(cur_name, "P%c%d", + port_base + 'A' + i, j); + + cur_pin->pin.number = (port_base + i) * PINS_PER_BANK + j; + cur_pin->pin.name = cur_name; + cur_name += nchars + 1; + } + } + + return pins; +} + +/* + * Work out the number of functions for each pin. This will visit every + * child node of the pinctrl DT node to find all advertised functions. + * Provide memory to hold the per-function information and assign it to + * the pin table. + * Fill in the GPIO in/out functions already (that every pin has), also add + * an "irq" function at the end, for those pins in IRQ-capable ports. + * We do not fill in the extra functions (those describe in DT nodes) yet. + * We (ab)use the "variant" member in each pin to keep track of the number of + * extra functions needed. At the end this will get reset to 2, so that we + * can add extra function later, after the two GPIO functions. + */ +static int prepare_function_table(struct device *dev, struct device_node *pnode, + struct sunxi_desc_pin *pins, int npins, + const u8 *irq_bank_muxes) +{ + struct device_node *node; + struct property *prop; + struct sunxi_desc_function *func; + int num_funcs, irq_bank, last_bank, i; + + /* + * We need at least three functions per pin: + * - one for GPIO in + * - one for GPIO out + * - one for the sentinel signalling the end of the list + */ + num_funcs = 3 * npins; + + /* + * Add a function for each pin in a bank supporting interrupts. + * We temporarily (ab)use the variant field to store the number of + * functions per pin. This will be cleaned back to 0 before we hand + * over the whole structure to the generic sunxi pinctrl setup code. + */ + for (i = 0; i < npins; i++) { + struct sunxi_desc_pin *pin = &pins[i]; + int bank = pin->pin.number / PINS_PER_BANK; + + if (irq_bank_muxes[bank]) { + pin->variant++; + num_funcs++; + } + } + + /* + * Go over each pin group (every child of the pinctrl DT node) and + * add the number of special functions each pins has. Also update the + * total number of functions required. + * We might slightly overshoot here in case of double definitions. + */ + for_each_child_of_node(pnode, node) { + const char *name; + + of_property_for_each_string(node, "pins", prop, name) { + for (i = 0; i < npins; i++) { + if (strcmp(pins[i].pin.name, name)) + continue; + + pins[i].variant++; + num_funcs++; + break; + } + } + } + + /* + * Allocate the memory needed for the functions in one table. + * We later use pointers into this table to mark each pin. + */ + func = devm_kzalloc(dev, num_funcs * sizeof(*func), GFP_KERNEL); + if (!func) + return -ENOMEM; + + /* + * Assign the function's memory and fill in GPIOs, IRQ and a sentinel. + * The extra functions will be filled in later. + */ + irq_bank = 0; + last_bank = 0; + for (i = 0; i < npins; i++) { + struct sunxi_desc_pin *pin = &pins[i]; + int bank = pin->pin.number / PINS_PER_BANK; + int lastfunc = pin->variant + 1; + int irq_mux = irq_bank_muxes[bank]; + + func[0].name = "gpio_in"; + func[0].muxval = 0; + func[1].name = "gpio_out"; + func[1].muxval = 1; + + if (irq_mux) { + if (bank > last_bank) + irq_bank++; + func[lastfunc].muxval = irq_mux; + func[lastfunc].irqbank = irq_bank; + func[lastfunc].irqnum = pin->pin.number % PINS_PER_BANK; + func[lastfunc].name = "irq"; + } + + if (bank > last_bank) + last_bank = bank; + + pin->functions = func; + + /* Skip over the other needed functions and the sentinel. */ + func += pin->variant + 3; + + /* + * Reset the value for filling in the remaining functions + * behind the GPIOs later. + */ + pin->variant = 2; + } + + return 0; +} + +/* + * Iterate over all pins in a single group and add the function name and its + * mux value to the respective pin. + * The "variant" member is again used to temporarily track the number of + * already added functions. + */ +static void fill_pin_function(struct device *dev, struct device_node *node, + struct sunxi_desc_pin *pins, int npins) +{ + const char *name, *funcname; + struct sunxi_desc_function *func; + struct property *prop; + int pin, i, index; + u8 muxval; + + if (of_property_read_string(node, "function", &funcname)) { + dev_warn(dev, "missing \"function\" property\n"); + return; + } + + index = 0; + of_property_for_each_string(node, "pins", prop, name) { + /* Find the index of this pin in our table. */ + for (pin = 0; pin < npins; pin++) + if (!strcmp(pins[pin].pin.name, name)) + break; + if (pin == npins) { + dev_warn(dev, "%s: cannot find pin %s\n", + of_node_full_name(node), name); + index++; + continue; + } + + /* Read the associated mux value. */ + muxval = sunxi_pinctrl_dt_read_pinmux(node, index); + if (muxval == INVALID_MUX) { + dev_warn(dev, "%s: invalid mux value for pin %s\n", + of_node_full_name(node), name); + index++; + continue; + } + + /* + * Check for double definitions by comparing the to-be-added + * function with already assigned ones. + * Ignore identical pairs (function name and mux value the + * same), but warn about conflicting assignments. + */ + for (i = 2; i < pins[pin].variant; i++) { + func = &pins[pin].functions[i]; + + /* Skip over totally unrelated functions. */ + if (strcmp(func->name, funcname) && + func->muxval != muxval) + continue; + + /* Ignore (but skip below) any identical functions. */ + if (!strcmp(func->name, funcname) && + muxval == func->muxval) + break; + + dev_warn(dev, + "pin %s: function %s redefined to mux %d\n", + name, funcname, muxval); + break; + } + + /* Skip any pins with that function already assigned. */ + if (i < pins[pin].variant) { + index++; + continue; + } + + /* Assign function and muxval to the next free slot. */ + func = &pins[pin].functions[pins[pin].variant]; + func->muxval = muxval; + func->name = funcname; + + pins[pin].variant++; + index++; + } +} + +/* + * Initialise the pinctrl table, by building it from driver provided + * information: the number of pins per bank, the IRQ capable banks and their + * IRQ mux value. + * Then iterate over all pinctrl DT node children to enter the function name + * and mux values for each mentioned pin. + * At the end hand over this structure to the actual sunxi pinctrl driver. + */ +int sunxi_pinctrl_dt_table_init(struct platform_device *pdev, + const u8 *pins_per_bank, + const u8 *irq_bank_muxes, + struct sunxi_pinctrl_desc *desc) +{ + struct device_node *pnode = pdev->dev.of_node, *node; + struct sunxi_desc_pin *pins; + int ret, i; + + pins = init_pins_table(&pdev->dev, pins_per_bank, desc); + if (IS_ERR(pins)) + return PTR_ERR(pins); + + ret = prepare_function_table(&pdev->dev, pnode, pins, desc->npins, + irq_bank_muxes); + if (ret) + return ret; + + /* + * Now iterate over all groups and add the respective function name + * and mux values to each pin listed within. + */ + for_each_child_of_node(pnode, node) + fill_pin_function(&pdev->dev, node, pins, desc->npins); + + /* Clear the temporary storage. */ + for (i = 0; i < desc->npins; i++) + pins[i].variant = 0; + + desc->pins = pins; + + return sunxi_pinctrl_init_with_variant(pdev, desc, 0); +} diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.h b/drivers/pinctrl/sunxi/pinctrl-sunxi.h index a87a2f944d60..2305d05c70f8 100644 --- a/drivers/pinctrl/sunxi/pinctrl-sunxi.h +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.h @@ -29,6 +29,9 @@ #define PM_BASE 384 #define PN_BASE 416 +/* maximum number of banks per controller (PA -> PK) */ +#define SUNXI_PINCTRL_MAX_BANKS 11 + #define SUNXI_PINCTRL_PIN(bank, pin) \ PINCTRL_PIN(P ## bank ## _BASE + (pin), "P" #bank #pin) @@ -306,4 +309,9 @@ int sunxi_pinctrl_init_with_variant(struct platform_device *pdev, #define sunxi_pinctrl_init(_dev, _desc) \ sunxi_pinctrl_init_with_variant(_dev, _desc, 0) +int sunxi_pinctrl_dt_table_init(struct platform_device *pdev, + const u8 *pins_per_bank, + const u8 *irq_bank_muxes, + struct sunxi_pinctrl_desc *desc); + #endif /* __PINCTRL_SUNXI_H */ From patchwork Thu Nov 10 01:42:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andre Przywara X-Patchwork-Id: 17898 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:6687:0:0:0:0:0 with SMTP id l7csp667999wru; Wed, 9 Nov 2022 17:47:42 -0800 (PST) X-Google-Smtp-Source: AMsMyM43ZoVERbpzq1vaXCaEM0eCEs5nL5twNdMoh/uBAAP7rIYvab3aef30GwnXx6sjicWemef3 X-Received: by 2002:a17:90a:600a:b0:213:2a:851c with SMTP id y10-20020a17090a600a00b00213002a851cmr81075099pji.177.1668044862077; Wed, 09 Nov 2022 17:47:42 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1668044862; cv=none; d=google.com; s=arc-20160816; b=s8YAiGctWiYKWnEtj05y9N5pZTT5eO+PpefJ6I5muoigsxkHuYvf3EkAOwshkPK/is AfrwQmI+su5fNY4ADX7Qmh6tr/0qKb/YOTrVPlDZAwfK5ZikK+FqSbiAqr6kIZOODDbF SryFiGuuLO653w25U7fTbX6qm+6QYV82KeRaUdkJqEFBsc7pKTG94T+7LRsixdX+qyDf JntF8ZTTI78JmGyk4LMvulSoVHwjWSpjnZ4rncAmGtIOgZinyj0f85DbMdQpPExO61kM WVrOMpt08Tf5Pyz8ovmAJMCqhTrVDtqAmXgQ8A90GCZrtHjIph8lS+cMf19CeMqa03/1 4rwQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=uuxJaE7qPOAG4ngddqsgKjmctOp8YTqI4biieE2pgpM=; b=S6sIw+/3WqvIH8aRFvZGd4QZpnQeKV4Q77fRCC3dsqMLwrOAipVtEQb+Zby/TtLKxt RCnIUV51DFuWN08vhPzKXzuVXedVlUAgWSAM/QIv1gbWote/P2UofFuM3XtkGdXEXjCB T39K3hu/2rpFW5V+od2qshE9dEj6os2D2K9LQU4BH48VxAXIIw7+2Is4IKf1OQekHGXw nlWfjfKDZLEFOnzTFVAOfDSjf7O1KGg9X6g9eu4I6YaVaLyl0Ul4Aqp0YhAitHWVgK+x nJEgAuUywmF3c3cfEqiPtDl5v11DzwoOEc+yQdn0dpt4U0nLDHcGn6p+MZkq2+UvmqUG bz+Q== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id g3-20020a170902934300b001867e9ceda6si17311844plp.289.2022.11.09.17.47.29; Wed, 09 Nov 2022 17:47:42 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232172AbiKJBoe (ORCPT + 99 others); Wed, 9 Nov 2022 20:44:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42780 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231925AbiKJBo0 (ORCPT ); Wed, 9 Nov 2022 20:44:26 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id AA4DA275E2; Wed, 9 Nov 2022 17:44:25 -0800 (PST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9A0CFD6E; Wed, 9 Nov 2022 17:44:31 -0800 (PST) Received: from slackpad.fritz.box (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E2A0D3F703; Wed, 9 Nov 2022 17:44:23 -0800 (PST) From: Andre Przywara To: Linus Walleij , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland Cc: Icenowy Zheng , linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev Subject: [RFC PATCH 2/2] pinctrl: sunxi: Add support for the Allwinner V5 pin controller Date: Thu, 10 Nov 2022 01:42:55 +0000 Message-Id: <20221110014255.20711-3-andre.przywara@arm.com> X-Mailer: git-send-email 2.35.5 In-Reply-To: <20221110014255.20711-1-andre.przywara@arm.com> References: <20221110014255.20711-1-andre.przywara@arm.com> MIME-Version: 1.0 X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1749071809306852023?= X-GMAIL-MSGID: =?utf-8?q?1749071809306852023?= The Allwinner V5 contains pins in all 10 possible pin banks. Use the newly introduced DT based pinctrl driver to describe just the generic pinctrl properties, so advertise the number of pins per bank and the interrupt capabilities. The actual function/mux assignment is taken from the devicetree. Signed-off-by: Andre Przywara --- drivers/pinctrl/sunxi/Kconfig | 5 +++ drivers/pinctrl/sunxi/Makefile | 1 + drivers/pinctrl/sunxi/pinctrl-sun8i-v5.c | 52 ++++++++++++++++++++++++ 3 files changed, 58 insertions(+) create mode 100644 drivers/pinctrl/sunxi/pinctrl-sun8i-v5.c diff --git a/drivers/pinctrl/sunxi/Kconfig b/drivers/pinctrl/sunxi/Kconfig index a78fdbbdfc0c..6b8ea56c08fd 100644 --- a/drivers/pinctrl/sunxi/Kconfig +++ b/drivers/pinctrl/sunxi/Kconfig @@ -131,4 +131,9 @@ config PINCTRL_SUN50I_H616_R default ARM64 && ARCH_SUNXI select PINCTRL_SUNXI +config PINCTRL_SUN8I_V5 + bool "Support for the Allwinner V5 PIO" + default MACH_SUN8I + select PINCTRL_SUNXI + endif diff --git a/drivers/pinctrl/sunxi/Makefile b/drivers/pinctrl/sunxi/Makefile index f5bad7a52951..5b289e18bd5a 100644 --- a/drivers/pinctrl/sunxi/Makefile +++ b/drivers/pinctrl/sunxi/Makefile @@ -21,6 +21,7 @@ obj-$(CONFIG_PINCTRL_SUN8I_A83T_R) += pinctrl-sun8i-a83t-r.o obj-$(CONFIG_PINCTRL_SUN8I_H3) += pinctrl-sun8i-h3.o obj-$(CONFIG_PINCTRL_SUN8I_H3_R) += pinctrl-sun8i-h3-r.o obj-$(CONFIG_PINCTRL_SUN8I_V3S) += pinctrl-sun8i-v3s.o +obj-$(CONFIG_PINCTRL_SUN8I_V5) += pinctrl-sun8i-v5.o obj-$(CONFIG_PINCTRL_SUN20I_D1) += pinctrl-sun20i-d1.o obj-$(CONFIG_PINCTRL_SUN50I_H5) += pinctrl-sun50i-h5.o obj-$(CONFIG_PINCTRL_SUN50I_H6) += pinctrl-sun50i-h6.o diff --git a/drivers/pinctrl/sunxi/pinctrl-sun8i-v5.c b/drivers/pinctrl/sunxi/pinctrl-sun8i-v5.c new file mode 100644 index 000000000000..402b1c915e04 --- /dev/null +++ b/drivers/pinctrl/sunxi/pinctrl-sun8i-v5.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Allwinner V5 SoC pinctrl driver. + * + * Copyright (C) 2022 Arm Ltd. + */ + +#include +#include +#include +#include +#include + +#include "pinctrl-sunxi.h" + +static const unsigned int v5_irq_bank_map[] = { 0, 1, 5, 6, 7 }; + +static const u8 v5_irq_bank_muxes[SUNXI_PINCTRL_MAX_BANKS] = +/* PA PB PC PD PE PF PG PH */ + { 6, 6, 0, 0, 0, 6, 6, 6 }; + +static const u8 v5_nr_bank_pins[SUNXI_PINCTRL_MAX_BANKS] = +/* PA PB PC PD PE PF PG PH PI PJ */ + { 16, 11, 17, 23, 18, 7, 14, 16, 17, 18 }; + +static struct sunxi_pinctrl_desc v5_pinctrl_data = { + .irq_banks = ARRAY_SIZE(v5_irq_bank_map), + .irq_bank_map = v5_irq_bank_map, + .irq_read_needs_mux = true, + .io_bias_cfg_variant = BIAS_VOLTAGE_PIO_POW_MODE_SEL, +}; + +static int v5_pinctrl_probe(struct platform_device *pdev) +{ + return sunxi_pinctrl_dt_table_init(pdev, v5_nr_bank_pins, + v5_irq_bank_muxes, + &v5_pinctrl_data); +} + +static const struct of_device_id v5_pinctrl_match[] = { + { .compatible = "allwinner,sun8i-v5-pinctrl", }, + {} +}; + +static struct platform_driver v5_pinctrl_driver = { + .probe = v5_pinctrl_probe, + .driver = { + .name = "sun8i-v5-pinctrl", + .of_match_table = v5_pinctrl_match, + }, +}; +builtin_platform_driver(v5_pinctrl_driver);