From patchwork Tue May 21 14:51:32 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Cercueil X-Patchwork-Id: 10954029 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 50FEB14B6 for ; Tue, 21 May 2019 14:52:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 432092886F for ; Tue, 21 May 2019 14:52:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 411B428A0B; Tue, 21 May 2019 14:52:58 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AD9972886F for ; Tue, 21 May 2019 14:52:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728763AbfEUOwB (ORCPT ); Tue, 21 May 2019 10:52:01 -0400 Received: from outils.crapouillou.net ([89.234.176.41]:40792 "EHLO crapouillou.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728306AbfEUOwA (ORCPT ); Tue, 21 May 2019 10:52:00 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=crapouillou.net; s=mail; t=1558450317; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=UQ9MB+eaUpzl82aQ2euwrO1G0baAmSYj3B1vtrzvuGc=; b=eNKNPysJMN+RUtukUB8dtRYTQSbGCeX1lKFhS2rW6YE3wQfWNRfGU5gdoOr+YJJkGY0/gV d8VPpdBu0lOlXqHVaaifZFIpp9eGVWffpE9LB07DAptXSRgtBahT06Crzj7JAvyE2U5nsq 4gTSskXr4cJtqHXK1Dq3KLAhNOqqMqw= From: Paul Cercueil To: Rob Herring , Mark Rutland , Ralf Baechle , Paul Burton , James Hogan , Jonathan Corbet , Daniel Lezcano , Thomas Gleixner , Michael Turquette , Stephen Boyd , Jason Cooper , Marc Zyngier , Lee Jones Cc: Mathieu Malaterre , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-mips@vger.kernel.org, linux-doc@vger.kernel.org, linux-clk@vger.kernel.org, od@zcrc.me, Paul Cercueil Subject: [PATCH v12 04/13] mfd: Add Ingenic TCU driver Date: Tue, 21 May 2019 16:51:32 +0200 Message-Id: <20190521145141.9813-5-paul@crapouillou.net> In-Reply-To: <20190521145141.9813-1-paul@crapouillou.net> References: <20190521145141.9813-1-paul@crapouillou.net> MIME-Version: 1.0 Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This driver will provide a regmap that can be retrieved very early in the boot process through the API function ingenic_tcu_get_regmap(). Additionally, it will call devm_of_platform_populate() so that all the children devices will be probed. Signed-off-by: Paul Cercueil --- Notes: v12: New patch drivers/mfd/Kconfig | 8 +++ drivers/mfd/Makefile | 1 + drivers/mfd/ingenic-tcu.c | 113 ++++++++++++++++++++++++++++++++ include/linux/mfd/ingenic-tcu.h | 8 +++ 4 files changed, 130 insertions(+) create mode 100644 drivers/mfd/ingenic-tcu.c diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 294d9567cc71..a13544474e05 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -494,6 +494,14 @@ config HTC_I2CPLD This device provides input and output GPIOs through an I2C interface to one or more sub-chips. +config INGENIC_TCU + bool "Ingenic Timer/Counter Unit (TCU) support" + depends on MIPS || COMPILE_TEST + select REGMAP_MMIO + help + Say yes here to support the Timer/Counter Unit (TCU) IP present + in the JZ47xx SoCs from Ingenic. + config MFD_INTEL_QUARK_I2C_GPIO tristate "Intel Quark MFD I2C GPIO" depends on PCI diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 52b1a90ff515..fb89e131ae98 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -180,6 +180,7 @@ obj-$(CONFIG_AB8500_CORE) += ab8500-core.o ab8500-sysctrl.o obj-$(CONFIG_MFD_TIMBERDALE) += timberdale.o obj-$(CONFIG_PMIC_ADP5520) += adp5520.o obj-$(CONFIG_MFD_KEMPLD) += kempld-core.o +obj-$(CONFIG_INGENIC_TCU) += ingenic-tcu.o obj-$(CONFIG_MFD_INTEL_QUARK_I2C_GPIO) += intel_quark_i2c_gpio.o obj-$(CONFIG_LPC_SCH) += lpc_sch.o obj-$(CONFIG_LPC_ICH) += lpc_ich.o diff --git a/drivers/mfd/ingenic-tcu.c b/drivers/mfd/ingenic-tcu.c new file mode 100644 index 000000000000..6c1d5e4310c1 --- /dev/null +++ b/drivers/mfd/ingenic-tcu.c @@ -0,0 +1,113 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * JZ47xx SoCs TCU MFD driver + * Copyright (C) 2019 Paul Cercueil + */ + +#include +#include +#include +#include +#include + +struct ingenic_soc_info { + unsigned int num_channels; +}; + +static struct regmap *tcu_regmap __initdata; + +static const struct regmap_config ingenic_tcu_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .max_register = TCU_REG_OST_CNTHBUF, +}; + +static const struct ingenic_soc_info jz4740_soc_info = { + .num_channels = 8, +}; + +static const struct ingenic_soc_info jz4725b_soc_info = { + .num_channels = 6, +}; + +static const struct of_device_id ingenic_tcu_of_match[] = { + { .compatible = "ingenic,jz4740-tcu", .data = &jz4740_soc_info, }, + { .compatible = "ingenic,jz4725b-tcu", .data = &jz4725b_soc_info, }, + { .compatible = "ingenic,jz4770-tcu", .data = &jz4740_soc_info, }, + { } +}; + +static struct regmap * __init ingenic_tcu_create_regmap(struct device_node *np) +{ + struct resource res; + void __iomem *base; + struct regmap *map; + + if (!of_match_node(ingenic_tcu_of_match, np)) + return ERR_PTR(-EINVAL); + + base = of_io_request_and_map(np, 0, "TCU"); + if (IS_ERR(base)) + return ERR_PTR(PTR_ERR(base)); + + map = regmap_init_mmio(NULL, base, &ingenic_tcu_regmap_config); + if (IS_ERR(map)) + goto err_iounmap; + + return map; + +err_iounmap: + iounmap(base); + of_address_to_resource(np, 0, &res); + release_mem_region(res.start, resource_size(&res)); + + return map; +} + +static int __init ingenic_tcu_probe(struct platform_device *pdev) +{ + struct regmap *map = ingenic_tcu_get_regmap(pdev->dev.of_node); + + platform_set_drvdata(pdev, map); + + regmap_attach_dev(&pdev->dev, map, &ingenic_tcu_regmap_config); + + return devm_of_platform_populate(&pdev->dev); +} + +static struct platform_driver ingenic_tcu_driver = { + .driver = { + .name = "ingenic-tcu", + .of_match_table = ingenic_tcu_of_match, + }, +}; + +static int __init ingenic_tcu_platform_init(void) +{ + return platform_driver_probe(&ingenic_tcu_driver, + ingenic_tcu_probe); +} +subsys_initcall(ingenic_tcu_platform_init); + +struct regmap * __init ingenic_tcu_get_regmap(struct device_node *np) +{ + if (!tcu_regmap) + tcu_regmap = ingenic_tcu_create_regmap(np); + + return tcu_regmap; +} + +bool ingenic_tcu_pwm_can_use_chn(struct device *dev, unsigned int channel) +{ + const struct ingenic_soc_info *soc = device_get_match_data(dev->parent); + + /* Enable all TCU channels for PWM use by default except channels 0/1 */ + u32 pwm_channels_mask = GENMASK(soc->num_channels - 1, 2); + + device_property_read_u32(dev->parent, "ingenic,pwm-channels-mask", + &pwm_channels_mask); + + return !!(pwm_channels_mask & BIT(channel)); +} +EXPORT_SYMBOL_GPL(ingenic_tcu_pwm_can_use_chn); diff --git a/include/linux/mfd/ingenic-tcu.h b/include/linux/mfd/ingenic-tcu.h index 2083fa20821d..21df23916cd2 100644 --- a/include/linux/mfd/ingenic-tcu.h +++ b/include/linux/mfd/ingenic-tcu.h @@ -6,6 +6,11 @@ #define __LINUX_MFD_INGENIC_TCU_H_ #include +#include + +struct device; +struct device_node; +struct regmap; #define TCU_REG_WDT_TDR 0x00 #define TCU_REG_WDT_TCER 0x04 @@ -53,4 +58,7 @@ #define TCU_REG_TCNTc(c) (TCU_REG_TCNT0 + ((c) * TCU_CHANNEL_STRIDE)) #define TCU_REG_TCSRc(c) (TCU_REG_TCSR0 + ((c) * TCU_CHANNEL_STRIDE)) +struct regmap * __init ingenic_tcu_get_regmap(struct device_node *np); +bool ingenic_tcu_pwm_can_use_chn(struct device *dev, unsigned int channel); + #endif /* __LINUX_MFD_INGENIC_TCU_H_ */