From patchwork Sun Jun 16 10:53:56 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Biju Das X-Patchwork-Id: 13699519 X-Patchwork-Delegate: geert@linux-m68k.org Received: from relmlie6.idc.renesas.com (relmlor2.renesas.com [210.160.252.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id B7ED949635; Sun, 16 Jun 2024 10:54:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.160.252.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718535271; cv=none; b=clRIy9cDF7QGHYnpwZqE0ldUVuaqE6yDnS5u+INfZ0sstRDumqL4sInhF/OOfUGH6zyciOieU6wzcBk+FLpAN7e8XIWlYxIlenvpVLQfQ8YUS6luz0k8WbuUkE839zLk2UFyAAr4FLFaHhIch8wecbc1ibB5AVrAe9wMGs4WhfQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718535271; c=relaxed/simple; bh=sK3vwRjChb7ryYxEoP6WZ0dLVkOPhWJP0kw3GDQp0Ws=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=U2RILKkEpLjbbXAYFr5nRgZwMRYntb7gKMr6lNK/V/YuifkZXHbeYQC0j/aDnFdN6EW+2564R36zJDeUso3Lx5ePlVCcaO2yyQcR1gWBIw0E7N1r1b5Ol2dEKJkJH8Wmwy4/7PJ1FspNCHp88xh0IJsnHDzGsbirUGk+tsBwcQo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=bp.renesas.com; spf=pass smtp.mailfrom=bp.renesas.com; arc=none smtp.client-ip=210.160.252.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=bp.renesas.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bp.renesas.com X-IronPort-AV: E=Sophos;i="6.08,242,1712588400"; d="scan'208";a="212062406" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie6.idc.renesas.com with ESMTP; 16 Jun 2024 19:54:28 +0900 Received: from localhost.localdomain (unknown [10.226.92.60]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id AEE5341FEF44; Sun, 16 Jun 2024 19:54:24 +0900 (JST) From: Biju Das To: Liam Girdwood , Mark Brown Cc: Biju Das , Philipp Zabel , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Geert Uytterhoeven , Magnus Damm , devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Prabhakar Mahadev Lad , Biju Das Subject: [PATCH v4 4/6] regulator: Add Renesas RZ/G2L USB VBUS regulator driver Date: Sun, 16 Jun 2024 11:53:56 +0100 Message-ID: <20240616105402.45211-5-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240616105402.45211-1-biju.das.jz@bp.renesas.com> References: <20240616105402.45211-1-biju.das.jz@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 As per the RZ/G2L HW manual, VBUSEN can be controlled by the VBOUT bit of the VBUS Control Register. This register is mapped in the reset framework. The reset driver expose this register as regmap and instantiates this driver. The consumer will use the regulator API to control the VBOUT bit as the control need to be done in the atomic context. Signed-off-by: Biju Das --- v3->v4: * Added check for of_get_child_by_name(). * Released the resource by of_node_put() v2->v3: * Dropped vbus_voltages table * Added support for enabling/disabling regulator through regmap API's * Updated rzg2l_usb_vbus_rdesc with enable_{reg,mask}, fixed_uV and n_voltages * Updated of_node with child node of the parent device. v1->v2: * New patch --- drivers/regulator/Kconfig | 9 +++ drivers/regulator/Makefile | 1 + .../regulator/renesas-usb-vbus-regulator.c | 74 +++++++++++++++++++ 3 files changed, 84 insertions(+) create mode 100644 drivers/regulator/renesas-usb-vbus-regulator.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index d333be2bea3b..0281a9a6f4ce 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -1634,6 +1634,15 @@ config REGULATOR_UNIPHIER help Support for regulators implemented on Socionext UniPhier SoCs. +config REGULATOR_RZG2L_VBCTRL + tristate "Renesas RZ/G2L USB VBUS regulator driver" + depends on ARCH_RZG2L || COMPILE_TEST + depends on OF + select REGMAP_MMIO + default ARCH_RZG2L + help + Support for VBUS regulators implemented on Renesas RZ/G2L SoCs. + config REGULATOR_VCTRL tristate "Voltage controlled regulators" depends on OF diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index ba15fa5f30ad..6127ffb4b011 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -189,6 +189,7 @@ obj-$(CONFIG_REGULATOR_TPS65132) += tps65132-regulator.o obj-$(CONFIG_REGULATOR_TPS68470) += tps68470-regulator.o obj-$(CONFIG_REGULATOR_TWL4030) += twl-regulator.o twl6030-regulator.o obj-$(CONFIG_REGULATOR_UNIPHIER) += uniphier-regulator.o +obj-$(CONFIG_REGULATOR_RZG2L_VBCTRL) += renesas-usb-vbus-regulator.o obj-$(CONFIG_REGULATOR_VCTRL) += vctrl-regulator.o obj-$(CONFIG_REGULATOR_VEXPRESS) += vexpress-regulator.o obj-$(CONFIG_REGULATOR_VQMMC_IPQ4019) += vqmmc-ipq4019-regulator.o diff --git a/drivers/regulator/renesas-usb-vbus-regulator.c b/drivers/regulator/renesas-usb-vbus-regulator.c new file mode 100644 index 000000000000..4eceb6b54497 --- /dev/null +++ b/drivers/regulator/renesas-usb-vbus-regulator.c @@ -0,0 +1,74 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Renesas USB VBUS output regulator driver +// +// Copyright (C) 2024 Renesas Electronics Corporation +// + +#include +#include +#include +#include +#include +#include +#include +#include + +static const struct regulator_ops rzg2l_usb_vbus_reg_ops = { + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, +}; + +static const struct regulator_desc rzg2l_usb_vbus_rdesc = { + .name = "vbus", + .of_match = of_match_ptr("regulator-vbus"), + .ops = &rzg2l_usb_vbus_reg_ops, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .enable_reg = 0, + .enable_mask = BIT(0), + .enable_is_inverted = true, + .fixed_uV = 5000000, + .n_voltages = 1, +}; + +static int rzg2l_usb_vbus_regulator_probe(struct platform_device *pdev) +{ + struct regulator_config config = { }; + struct device *dev = &pdev->dev; + struct regulator_dev *rdev; + + config.regmap = dev_get_regmap(dev->parent, NULL); + if (!config.regmap) + return dev_err_probe(dev, -ENOENT, "Failed to get regmap\n"); + + config.dev = dev; + config.of_node = of_get_child_by_name(dev->parent->of_node, "regulator-vbus"); + if (!config.of_node) + return dev_err_probe(dev, -ENODEV, "regulator node not found\n"); + + rdev = devm_regulator_register(dev, &rzg2l_usb_vbus_rdesc, &config); + if (IS_ERR(rdev)) { + of_node_put(config.of_node); + return dev_err_probe(dev, PTR_ERR(rdev), + "not able to register vbus regulator\n"); + } + + of_node_put(config.of_node); + + return 0; +} + +static struct platform_driver rzg2l_usb_vbus_regulator_driver = { + .probe = rzg2l_usb_vbus_regulator_probe, + .driver = { + .name = "rzg2l-usb-vbus-regulator", + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + }, +}; +module_platform_driver(rzg2l_usb_vbus_regulator_driver); + +MODULE_AUTHOR("Biju Das "); +MODULE_DESCRIPTION("Renesas RZ/G2L USB Vbus Regulator Driver"); +MODULE_LICENSE("GPL");