From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B840BC47257 for ; Sat, 9 May 2020 08:18:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A0E582054F for ; Sat, 9 May 2020 08:18:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727856AbgEIISj (ORCPT ); Sat, 9 May 2020 04:18:39 -0400 Received: from v6.sk ([167.172.42.174]:48982 "EHLO v6.sk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727803AbgEIISi (ORCPT ); Sat, 9 May 2020 04:18:38 -0400 Received: from localhost (v6.sk [IPv6:::1]) by v6.sk (Postfix) with ESMTP id CC517610B4; Sat, 9 May 2020 08:18:06 +0000 (UTC) From: Lubomir Rintel To: Kishon Vijay Abraham I Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Lubomir Rintel Subject: [RESEND PATCH v2 3/3] phy: Add USB HSIC PHY driver for Marvell MMP3 SoC Date: Sat, 9 May 2020 10:17:54 +0200 Message-Id: <20200509081754.474787-4-lkundrak@v3.sk> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200509081754.474787-1-lkundrak@v3.sk> References: <20200509081754.474787-1-lkundrak@v3.sk> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add PHY driver for the HSICs found on Marvell MMP3 SoC. The driver is rather straightforward -- the PHY essentially just needs to be enabled. Signed-off-by: Lubomir Rintel --- Changes since v1: - Explicitely cast drvdata pointer to make sparse happy drivers/phy/marvell/Kconfig | 12 +++++ drivers/phy/marvell/Makefile | 1 + drivers/phy/marvell/phy-mmp3-hsic.c | 82 +++++++++++++++++++++++++++++ 3 files changed, 95 insertions(+) create mode 100644 drivers/phy/marvell/phy-mmp3-hsic.c diff --git a/drivers/phy/marvell/Kconfig b/drivers/phy/marvell/Kconfig index 8f6273c837ec..6c96f2bf5266 100644 --- a/drivers/phy/marvell/Kconfig +++ b/drivers/phy/marvell/Kconfig @@ -116,3 +116,15 @@ config PHY_MMP3_USB The PHY driver will be used by Marvell udc/ehci/otg driver. To compile this driver as a module, choose M here. + +config PHY_MMP3_HSIC + tristate "Marvell MMP3 USB HSIC PHY Driver" + depends on MACH_MMP3_DT || COMPILE_TEST + select GENERIC_PHY + help + Enable this to support Marvell MMP3 USB HSIC PHY driver for + Marvell MMP3 SoC. This driver will be used my the Marvell EHCI + driver to initialize the interface to internal USB HSIC + components on MMP3-based boards. + + To compile this driver as a module, choose M here. diff --git a/drivers/phy/marvell/Makefile b/drivers/phy/marvell/Makefile index 5a106b1549f4..7f296ef02829 100644 --- a/drivers/phy/marvell/Makefile +++ b/drivers/phy/marvell/Makefile @@ -3,6 +3,7 @@ obj-$(CONFIG_ARMADA375_USBCLUSTER_PHY) += phy-armada375-usb2.o obj-$(CONFIG_PHY_BERLIN_SATA) += phy-berlin-sata.o obj-$(CONFIG_PHY_BERLIN_USB) += phy-berlin-usb.o obj-$(CONFIG_PHY_MMP3_USB) += phy-mmp3-usb.o +obj-$(CONFIG_PHY_MMP3_HSIC) += phy-mmp3-hsic.o obj-$(CONFIG_PHY_MVEBU_A3700_COMPHY) += phy-mvebu-a3700-comphy.o obj-$(CONFIG_PHY_MVEBU_A3700_UTMI) += phy-mvebu-a3700-utmi.o obj-$(CONFIG_PHY_MVEBU_A38X_COMPHY) += phy-armada38x-comphy.o diff --git a/drivers/phy/marvell/phy-mmp3-hsic.c b/drivers/phy/marvell/phy-mmp3-hsic.c new file mode 100644 index 000000000000..47c1e8894939 --- /dev/null +++ b/drivers/phy/marvell/phy-mmp3-hsic.c @@ -0,0 +1,82 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2020 Lubomir Rintel + */ + +#include +#include +#include +#include +#include + +#define HSIC_CTRL 0x08 +#define HSIC_ENABLE BIT(7) +#define PLL_BYPASS BIT(4) + +static int mmp3_hsic_phy_init(struct phy *phy) +{ + void __iomem *base = (void __iomem *)phy_get_drvdata(phy); + u32 hsic_ctrl; + + hsic_ctrl = readl_relaxed(base + HSIC_CTRL); + hsic_ctrl |= HSIC_ENABLE; + hsic_ctrl |= PLL_BYPASS; + writel_relaxed(hsic_ctrl, base + HSIC_CTRL); + + return 0; +} + +static const struct phy_ops mmp3_hsic_phy_ops = { + .init = mmp3_hsic_phy_init, + .owner = THIS_MODULE, +}; + +static const struct of_device_id mmp3_hsic_phy_of_match[] = { + { .compatible = "marvell,mmp3-hsic-phy", }, + { }, +}; +MODULE_DEVICE_TABLE(of, mmp3_hsic_phy_of_match); + +static int mmp3_hsic_phy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct phy_provider *provider; + struct resource *resource; + void __iomem *base; + struct phy *phy; + + resource = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_ioremap_resource(dev, resource); + if (IS_ERR(base)) { + dev_err(dev, "failed to remap PHY regs\n"); + return PTR_ERR(base); + } + + phy = devm_phy_create(dev, NULL, &mmp3_hsic_phy_ops); + if (IS_ERR(phy)) { + dev_err(dev, "failed to create PHY\n"); + return PTR_ERR(phy); + } + + phy_set_drvdata(phy, (void *)base); + provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + if (IS_ERR(provider)) { + dev_err(dev, "failed to register PHY provider\n"); + return PTR_ERR(provider); + } + + return 0; +} + +static struct platform_driver mmp3_hsic_phy_driver = { + .probe = mmp3_hsic_phy_probe, + .driver = { + .name = "mmp3-hsic-phy", + .of_match_table = mmp3_hsic_phy_of_match, + }, +}; +module_platform_driver(mmp3_hsic_phy_driver); + +MODULE_AUTHOR("Lubomir Rintel "); +MODULE_DESCRIPTION("Marvell MMP3 USB HSIC PHY Driver"); +MODULE_LICENSE("GPL"); -- 2.26.2