From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752909AbbATJrk (ORCPT ); Tue, 20 Jan 2015 04:47:40 -0500 Received: from metis.ext.pengutronix.de ([92.198.50.35]:55116 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752386AbbATJrg (ORCPT ); Tue, 20 Jan 2015 04:47:36 -0500 From: Sascha Hauer To: Olof Johansson , Arnd Bergmann Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Rob Herring , Eddie Huang , Matthias Brugger , Samuel Ortiz , Lee Jones , Mark Brown , Sascha Hauer Subject: [PATCH 1/8] soc: Add MediaTek infracfg controller support Date: Tue, 20 Jan 2015 10:47:04 +0100 Message-Id: <1421747231-554-2-git-send-email-s.hauer@pengutronix.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1421747231-554-1-git-send-email-s.hauer@pengutronix.de> References: <1421747231-554-1-git-send-email-s.hauer@pengutronix.de> X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: sha@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This adds support for the MediaTek infracfg controller found on the MT8135/MT8173 SoCs. The infracfg controller contains miscellaneous registers for controlling peripheral resets and clocks. Signed-off-by: Sascha Hauer --- .../devicetree/bindings/soc/mediatek/infracfg.txt | 19 +++ drivers/soc/Kconfig | 1 + drivers/soc/Makefile | 1 + drivers/soc/mediatek/Kconfig | 12 ++ drivers/soc/mediatek/Makefile | 1 + drivers/soc/mediatek/mtk-infracfg.c | 127 ++++++++++++++++++++ drivers/soc/mediatek/mtk-pericfg.c | 128 +++++++++++++++++++++ 7 files changed, 289 insertions(+) create mode 100644 Documentation/devicetree/bindings/soc/mediatek/infracfg.txt create mode 100644 drivers/soc/mediatek/Kconfig create mode 100644 drivers/soc/mediatek/Makefile create mode 100644 drivers/soc/mediatek/mtk-infracfg.c create mode 100644 drivers/soc/mediatek/mtk-pericfg.c diff --git a/Documentation/devicetree/bindings/soc/mediatek/infracfg.txt b/Documentation/devicetree/bindings/soc/mediatek/infracfg.txt new file mode 100644 index 0000000..042083a --- /dev/null +++ b/Documentation/devicetree/bindings/soc/mediatek/infracfg.txt @@ -0,0 +1,19 @@ +MediaTek infracfg Controller + +The infracfg controller contains miscellaneous registers for controlling +clocks, resets and bus settings. + +Required properties: +- compatible: must be one of: + mediatek,mt8135-infracfg + mediatek,mt8173-infracfg +- reg: Address range for the infracfg controller + +Example: + + infracfg: infracfg@10003000 { + #reset-cells = <1>; + #clock-cells = <1>; + compatible = "mediatek,mt8135-infracfg"; + reg = <0 0x10003000 0 0x1000>; + }; diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig index 76d6bd4..d8bde82f0 100644 --- a/drivers/soc/Kconfig +++ b/drivers/soc/Kconfig @@ -1,5 +1,6 @@ menu "SOC (System On Chip) specific Drivers" +source "drivers/soc/mediatek/Kconfig" source "drivers/soc/qcom/Kconfig" source "drivers/soc/ti/Kconfig" source "drivers/soc/versatile/Kconfig" diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile index 063113d..70042b2 100644 --- a/drivers/soc/Makefile +++ b/drivers/soc/Makefile @@ -2,6 +2,7 @@ # Makefile for the Linux Kernel SOC specific device drivers. # +obj-$(CONFIG_ARCH_MEDIATEK) += mediatek/ obj-$(CONFIG_ARCH_QCOM) += qcom/ obj-$(CONFIG_ARCH_TEGRA) += tegra/ obj-$(CONFIG_SOC_TI) += ti/ diff --git a/drivers/soc/mediatek/Kconfig b/drivers/soc/mediatek/Kconfig new file mode 100644 index 0000000..3ad39fe --- /dev/null +++ b/drivers/soc/mediatek/Kconfig @@ -0,0 +1,12 @@ +# +# MediaTek SoC drivers +# +config MTK_INFRACFG + tristate "MediaTek infracfg controller support" + depends on ARCH_MEDIATEK || COMPILE_TEST + select REGMAP + help + The MediaTek infracfg controller found on MT8135 and MT8173 SoCs + contains several miscellaneous registers for clock, reset and bus + settings. Say yes here if you want to run your kernel on one of these + SoCs. diff --git a/drivers/soc/mediatek/Makefile b/drivers/soc/mediatek/Makefile new file mode 100644 index 0000000..dbeb627 --- /dev/null +++ b/drivers/soc/mediatek/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_MTK_INFRACFG) += mtk-infracfg.o diff --git a/drivers/soc/mediatek/mtk-infracfg.c b/drivers/soc/mediatek/mtk-infracfg.c new file mode 100644 index 0000000..3bbd39b --- /dev/null +++ b/drivers/soc/mediatek/mtk-infracfg.c @@ -0,0 +1,127 @@ +/* + * Copyright (c) 2014 MediaTek Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include + +struct mtk_infracfg { + struct regmap *regmap; + struct reset_controller_dev rcdev; +}; + +static int mtk_infracfg_reset_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct mtk_infracfg *data = container_of(rcdev, struct mtk_infracfg, rcdev); + + return regmap_update_bits(data->regmap, 0x30 + ((id / 32) << 2), BIT(id % 32), ~0u); +} + +static int mtk_infracfg_reset_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct mtk_infracfg *data = container_of(rcdev, struct mtk_infracfg, rcdev); + + return regmap_update_bits(data->regmap, 0x30 + ((id / 32) << 2), BIT(id % 32), 0); +} + +static int mtk_infracfg_reset(struct reset_controller_dev *rcdev, + unsigned long id) +{ + int ret; + + ret = mtk_infracfg_reset_assert(rcdev, id); + if (ret) + return ret; + + return mtk_infracfg_reset_deassert(rcdev, id); +} + +static struct reset_control_ops mtk_infracfg_reset_ops = { + .assert = mtk_infracfg_reset_assert, + .deassert = mtk_infracfg_reset_deassert, + .reset = mtk_infracfg_reset, +}; + +static struct regmap_config mtk_infracfg_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, +}; + +static int mtk_infracfg_probe(struct platform_device *pdev) +{ + struct mtk_infracfg *data; + struct resource *res; + void __iomem *base; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + data->regmap = devm_regmap_init_mmio(&pdev->dev, base, + &mtk_infracfg_regmap_config); + if (IS_ERR(data->regmap)) + return PTR_ERR(data->regmap); + + data->rcdev.owner = THIS_MODULE; + data->rcdev.nr_resets = 64; + data->rcdev.ops = &mtk_infracfg_reset_ops; + data->rcdev.of_node = pdev->dev.of_node; + + return reset_controller_register(&data->rcdev); +} + +static int mtk_infracfg_remove(struct platform_device *pdev) +{ + struct mtk_infracfg *data = platform_get_drvdata(pdev); + + reset_controller_unregister(&data->rcdev); + + return 0; +} + +static const struct of_device_id mtk_infracfg_dt_ids[] = { + { + .compatible = "mediatek,mt8173-infracfg", + }, { + .compatible = "mediatek,mt8135-infracfg", + }, { + /* sentinel */ + }, +}; +MODULE_DEVICE_TABLE(of, mtk_infracfg_dt_ids); + +static struct platform_driver mtk_infracfg_driver = { + .probe = mtk_infracfg_probe, + .remove = mtk_infracfg_remove, + .driver = { + .name = "mtk-infracfg", + .of_match_table = mtk_infracfg_dt_ids, + }, +}; + +module_platform_driver(mtk_infracfg_driver); + +MODULE_AUTHOR("Sascha Hauer "); +MODULE_DESCRIPTION("MediaTek infracfg controller"); +MODULE_LICENSE("GPL"); diff --git a/drivers/soc/mediatek/mtk-pericfg.c b/drivers/soc/mediatek/mtk-pericfg.c new file mode 100644 index 0000000..b7ee902 --- /dev/null +++ b/drivers/soc/mediatek/mtk-pericfg.c @@ -0,0 +1,128 @@ +/* + * Copyright (c) 2014 MediaTek Inc. + * Author: Flora Fu + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include + +struct mtk_pericfg { + struct regmap *regmap; + struct reset_controller_dev rcdev; +}; + +static int mtk_pericfg_reset_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct mtk_pericfg *data = container_of(rcdev, struct mtk_pericfg, rcdev); + + return regmap_update_bits(data->regmap, (id / 32) << 2, BIT(id % 32), ~0); +} + +static int mtk_pericfg_reset_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct mtk_pericfg *data = container_of(rcdev, struct mtk_pericfg, rcdev); + + return regmap_update_bits(data->regmap, (id / 32) << 2, BIT(id % 32), 0); +} + +static int mtk_pericfg_reset(struct reset_controller_dev *rcdev, + unsigned long id) +{ + int ret; + + ret = mtk_pericfg_reset_assert(rcdev, id); + if (ret) + return ret; + + return mtk_pericfg_reset_deassert(rcdev, id); +} + +static struct reset_control_ops mtk_pericfg_reset_ops = { + .assert = mtk_pericfg_reset_assert, + .deassert = mtk_pericfg_reset_deassert, + .reset = mtk_pericfg_reset, +}; + +static struct regmap_config mtk_pericfg_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, +}; + +static int mtk_pericfg_probe(struct platform_device *pdev) +{ + struct mtk_pericfg *data; + struct resource *res; + void __iomem *base; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + data->regmap = devm_regmap_init_mmio(&pdev->dev, base, + &mtk_pericfg_regmap_config); + if (IS_ERR(data->regmap)) + return PTR_ERR(data->regmap); + + data->rcdev.owner = THIS_MODULE; + data->rcdev.nr_resets = 64; + data->rcdev.ops = &mtk_pericfg_reset_ops; + data->rcdev.of_node = pdev->dev.of_node; + + return reset_controller_register(&data->rcdev); +} + +static int mtk_pericfg_remove(struct platform_device *pdev) +{ + struct mtk_pericfg *data = platform_get_drvdata(pdev); + + reset_controller_unregister(&data->rcdev); + + return 0; +} + +static const struct of_device_id mtk_pericfg_dt_ids[] = { + { + .compatible = "mediatek,mt8173-pericfg", + }, { + .compatible = "mediatek,mt8135-pericfg", + }, { + /* sentinel */ + }, +}; +MODULE_DEVICE_TABLE(of, mtk_pericfg_dt_ids); + +static struct platform_driver mtk_pericfg_driver = { + .probe = mtk_pericfg_probe, + .remove = mtk_pericfg_remove, + .driver = { + .name = "mtk-pericfg", + .of_match_table = mtk_pericfg_dt_ids, + }, +}; + +module_platform_driver(mtk_pericfg_driver); + +MODULE_AUTHOR("Sascha Hauer "); +MODULE_DESCRIPTION("MediaTek pericfg controller"); +MODULE_LICENSE("GPL"); -- 2.1.4