From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753869AbcKRNcH (ORCPT ); Fri, 18 Nov 2016 08:32:07 -0500 Received: from lelnx194.ext.ti.com ([198.47.27.80]:53679 "EHLO lelnx194.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753085AbcKRN27 (ORCPT ); Fri, 18 Nov 2016 08:28:59 -0500 From: Kishon Vijay Abraham I To: CC: , Subject: [PATCH 08/20] phy: rockchip-inno-usb2: correct 480MHz output clock stable time Date: Fri, 18 Nov 2016 18:58:31 +0530 Message-ID: <1479475723-4857-9-git-send-email-kishon@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1479475723-4857-1-git-send-email-kishon@ti.com> References: <1479475723-4857-1-git-send-email-kishon@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: William Wu We found that the system crashed due to 480MHz output clock of USB2 PHY was unstable after clock had been enabled by gpu module. Theoretically, 1 millisecond is a critical value for 480MHz output clock stable time, so we try to change the delay time to 1.2 millisecond to avoid this issue. And the commit ed907fb1d7c3 ("phy: rockchip-inno-usb2: correct clk_ops callback") used prepare callbacks instead of enable callbacks to support gate a clk if the operation may sleep. So we can switch from delay to sleep functions. Also fix a spelling error from "waitting" to "waiting". Signed-off-by: William Wu Reviewed-by: Douglas Anderson Signed-off-by: Kishon Vijay Abraham I --- drivers/phy/phy-rockchip-inno-usb2.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/phy/phy-rockchip-inno-usb2.c b/drivers/phy/phy-rockchip-inno-usb2.c index 486a0e4..eb89de5 100644 --- a/drivers/phy/phy-rockchip-inno-usb2.c +++ b/drivers/phy/phy-rockchip-inno-usb2.c @@ -266,8 +266,8 @@ static int rockchip_usb2phy_clk480m_prepare(struct clk_hw *hw) if (ret) return ret; - /* waitting for the clk become stable */ - mdelay(1); + /* waiting for the clk become stable */ + usleep_range(1200, 1300); } return 0; -- 1.7.9.5