From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751956AbdARGJr (ORCPT ); Wed, 18 Jan 2017 01:09:47 -0500 Received: from mailgw01.mediatek.com ([210.61.82.183]:63499 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1750947AbdARGIp (ORCPT ); Wed, 18 Jan 2017 01:08:45 -0500 From: Chunfeng Yun To: Mathias Nyman , Felipe Balbi CC: Greg Kroah-Hartman , Matthias Brugger , Rob Herring , Mark Rutland , Ian Campbell , Chunfeng Yun , , , , , Subject: [PATCH 3/6] usb: xhci-mtk: add reference clock Date: Wed, 18 Jan 2017 14:08:24 +0800 Message-ID: <1484719707-12107-3-git-send-email-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1484719707-12107-1-git-send-email-chunfeng.yun@mediatek.com> References: <1484719707-12107-1-git-send-email-chunfeng.yun@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org usually, the reference clock comes from 26M oscillator directly, but some SoCs are not, add it for compatibility. Signed-off-by: Chunfeng Yun --- drivers/usb/host/xhci-mtk.c | 15 +++++++++++++++ drivers/usb/host/xhci-mtk.h | 1 + 2 files changed, 16 insertions(+) diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c index 1094ebd..4d75ac5 100644 --- a/drivers/usb/host/xhci-mtk.c +++ b/drivers/usb/host/xhci-mtk.c @@ -212,6 +212,12 @@ static int xhci_mtk_clks_enable(struct xhci_hcd_mtk *mtk) { int ret; + ret = clk_prepare_enable(mtk->ref_clk); + if (ret) { + dev_err(mtk->dev, "failed to enable ref_clk\n"); + goto ref_clk_err; + } + ret = clk_prepare_enable(mtk->sys_clk); if (ret) { dev_err(mtk->dev, "failed to enable sys_clk\n"); @@ -238,6 +244,8 @@ static int xhci_mtk_clks_enable(struct xhci_hcd_mtk *mtk) usb_p0_err: clk_disable_unprepare(mtk->sys_clk); sys_clk_err: + clk_disable_unprepare(mtk->ref_clk); +ref_clk_err: return -EINVAL; } @@ -248,6 +256,7 @@ static void xhci_mtk_clks_disable(struct xhci_hcd_mtk *mtk) clk_disable_unprepare(mtk->wk_deb_p0); } clk_disable_unprepare(mtk->sys_clk); + clk_disable_unprepare(mtk->ref_clk); } /* only clocks can be turn off for ip-sleep wakeup mode */ @@ -550,6 +559,12 @@ static int xhci_mtk_probe(struct platform_device *pdev) return PTR_ERR(mtk->sys_clk); } + mtk->ref_clk = devm_clk_get(dev, "ref_ck"); + if (IS_ERR(mtk->ref_clk)) { + dev_err(dev, "fail to get ref_ck\n"); + return PTR_ERR(mtk->ref_clk); + } + mtk->lpm_support = of_property_read_bool(node, "usb3-lpm-capable"); ret = usb_wakeup_of_property_parse(mtk, node); diff --git a/drivers/usb/host/xhci-mtk.h b/drivers/usb/host/xhci-mtk.h index 2845c49..3aa5e1d 100644 --- a/drivers/usb/host/xhci-mtk.h +++ b/drivers/usb/host/xhci-mtk.h @@ -124,6 +124,7 @@ struct xhci_hcd_mtk { struct regulator *vusb33; struct regulator *vbus; struct clk *sys_clk; /* sys and mac clock */ + struct clk *ref_clk; struct clk *wk_deb_p0; /* port0's wakeup debounce clock */ struct clk *wk_deb_p1; struct regmap *pericfg; -- 1.7.9.5