From patchwork Wed Aug 7 13:04:37 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tero Kristo X-Patchwork-Id: 11082123 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2FD3E1395 for ; Wed, 7 Aug 2019 13:05:07 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1FBBC289F4 for ; Wed, 7 Aug 2019 13:05:07 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1451F289B4; Wed, 7 Aug 2019 13:05:07 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AE6D02887D for ; Wed, 7 Aug 2019 13:05:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387975AbfHGNFG (ORCPT ); Wed, 7 Aug 2019 09:05:06 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:43580 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387476AbfHGNFG (ORCPT ); Wed, 7 Aug 2019 09:05:06 -0400 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id x77D534m018259; Wed, 7 Aug 2019 08:05:03 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1565183103; bh=5ZJWE2YShcEteM2b5hAEhwzpnJw3NLmASsHKII8cvV4=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=FiyP2UbME094Iy1/m9tNXIjVlMpuyshYCaRsc/pSo9HKnT+CQTHZPSscwnyn/UDtW ZMdlRUTGBuIlXcQ7xEgODGrWw30UieaQYpqe9JFeO0qOMgoRBWqXXayLHlRBkwE493 mNFpK+E9EkEobMTQlF3W7NiJVpiStFV/wtoQ6qm8= Received: from DLEE109.ent.ti.com (dlee109.ent.ti.com [157.170.170.41]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x77D53AF039631 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 7 Aug 2019 08:05:03 -0500 Received: from DLEE106.ent.ti.com (157.170.170.36) by DLEE109.ent.ti.com (157.170.170.41) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Wed, 7 Aug 2019 08:05:02 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DLEE106.ent.ti.com (157.170.170.36) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5 via Frontend Transport; Wed, 7 Aug 2019 08:05:02 -0500 Received: from gomoku.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id x77D4i1d081508; Wed, 7 Aug 2019 08:05:00 -0500 From: Tero Kristo To: , , CC: , , Subject: [PATCH 1/3] clk: ti: clkctrl: add support for polling clock status for enable only Date: Wed, 7 Aug 2019 16:04:37 +0300 Message-ID: <1565183079-27798-2-git-send-email-t-kristo@ti.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1565183079-27798-1-git-send-email-t-kristo@ti.com> References: <1565183079-27798-1-git-send-email-t-kristo@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The activity status for certain clocks is possible to be polled only during enable phase; the disable phase depends on additional reset logic. If the disable phase is polled with these clocks, it will result in a timeout. To fix this, add logic for polling the clock activity only during enable, and add a new flag for this purpose. Signed-off-by: Tero Kristo --- drivers/clk/ti/clkctrl.c | 5 ++++- drivers/clk/ti/clock.h | 1 + 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/clk/ti/clkctrl.c b/drivers/clk/ti/clkctrl.c index 975995e..f5517a8 100644 --- a/drivers/clk/ti/clkctrl.c +++ b/drivers/clk/ti/clkctrl.c @@ -25,6 +25,7 @@ #include "clock.h" #define NO_IDLEST 0x1 +#define NO_IDLE_POLL 0x2 #define OMAP4_MODULEMODE_MASK 0x3 @@ -187,7 +188,7 @@ static void _omap4_clkctrl_clk_disable(struct clk_hw *hw) ti_clk_ll_ops->clk_writel(val, &clk->enable_reg); - if (clk->flags & NO_IDLEST) + if (clk->flags & (NO_IDLEST | NO_IDLE_POLL)) goto exit; /* Wait until module is disabled */ @@ -597,6 +598,8 @@ static void __init _ti_omap4_clkctrl_setup(struct device_node *node) hw->enable_bit = MODULEMODE_HWCTRL; if (reg_data->flags & CLKF_NO_IDLEST) hw->flags |= NO_IDLEST; + if (reg_data->flags & CLKF_NO_IDLE_POLL) + hw->flags |= NO_IDLE_POLL; if (reg_data->clkdm_name) hw->clkdm_name = reg_data->clkdm_name; diff --git a/drivers/clk/ti/clock.h b/drivers/clk/ti/clock.h index e4b8392..6410ff6 100644 --- a/drivers/clk/ti/clock.h +++ b/drivers/clk/ti/clock.h @@ -82,6 +82,7 @@ enum { #define CLKF_SW_SUP BIT(5) #define CLKF_HW_SUP BIT(6) #define CLKF_NO_IDLEST BIT(7) +#define CLKF_NO_IDLE_POLL BIT(8) #define CLKF_SOC_MASK GENMASK(11, 8)