From patchwork Tue Oct 1 09:02:02 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tero Kristo X-Patchwork-Id: 11168291 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D6D9415AB for ; Tue, 1 Oct 2019 09:02:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B5E3D21920 for ; Tue, 1 Oct 2019 09:02:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="hpBlqfjR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733254AbfJAJCU (ORCPT ); Tue, 1 Oct 2019 05:02:20 -0400 Received: from lelv0142.ext.ti.com ([198.47.23.249]:51716 "EHLO lelv0142.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733127AbfJAJCU (ORCPT ); Tue, 1 Oct 2019 05:02:20 -0400 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id x9192I6N100560; Tue, 1 Oct 2019 04:02:18 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1569920538; bh=CklcykHhMCVqUFfGHjw+eIZ1P4HYWotwka0v5GHMZC0=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=hpBlqfjRVdi2YRAuvwXZxHLVjgtugeQQ62GCyLcIhEyyPayESgqpSJI6VhtwqXWIr TZpabXviEABo98qC7C3pmiwyW2G3yGpDio8BHaCI7UDVDPxB8k+alhqdAAkZKiqcZQ jeQ7+J+mtgV8dJIdjdfIGOvSV3tYInb9MSNj6ZGs= Received: from DFLE106.ent.ti.com (dfle106.ent.ti.com [10.64.6.27]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x9192Ipl122278 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 1 Oct 2019 04:02:18 -0500 Received: from DFLE110.ent.ti.com (10.64.6.31) by DFLE106.ent.ti.com (10.64.6.27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Tue, 1 Oct 2019 04:02:17 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DFLE110.ent.ti.com (10.64.6.31) 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; Tue, 1 Oct 2019 04:02:17 -0500 Received: from sokoban.bb.dnainternet.fi (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id x919290M032920; Tue, 1 Oct 2019 04:02:16 -0500 From: Tero Kristo To: , , CC: Subject: [PATCH 4/4] clk: keystone: sci-clk: add debugfs support for read/write of parent ID Date: Tue, 1 Oct 2019 12:02:02 +0300 Message-ID: <20191001090202.26346-5-t-kristo@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191001090202.26346-1-t-kristo@ti.com> References: <20191001090202.26346-1-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 Add parent_id node under debugfs for TI SCI clocks, that allow both read/write operations. This can be used to read the current parent ID, or force a change of current parent of a multi-parent clock. Signed-off-by: Tero Kristo --- drivers/clk/keystone/sci-clk.c | 45 ++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/drivers/clk/keystone/sci-clk.c b/drivers/clk/keystone/sci-clk.c index 7edf8c8432b6..39255b13bdc1 100644 --- a/drivers/clk/keystone/sci-clk.c +++ b/drivers/clk/keystone/sci-clk.c @@ -24,6 +24,7 @@ #include #include #include +#include #define SCI_CLK_SSC_ENABLE BIT(0) #define SCI_CLK_ALLOW_FREQ_CHANGE BIT(1) @@ -254,6 +255,41 @@ static int sci_clk_set_parent(struct clk_hw *hw, u8 index) index + 1 + clk->clk_id); } +#ifdef CONFIG_COMMON_CLK_DEBUGFS_WRITE_ACCESS +static int dbg_pid_get(void *data, u64 *val) +{ + struct clk_hw *hw = data; + + *val = sci_clk_get_parent(hw); + + return 0; +} + +static int dbg_pid_set(void *data, u64 val) +{ + struct clk_hw *hw = data; + struct clk_hw *parent = clk_hw_get_parent_by_index(hw, val); + + if (!parent) + return -EINVAL; + + clk_hw_reparent(hw, parent); + + return sci_clk_set_parent(hw, val); +} + +DEFINE_SIMPLE_ATTRIBUTE(sci_parent_id_fops, dbg_pid_get, dbg_pid_set, "%llu\n"); + +static void sci_clk_debug_init(struct clk_hw *hw, struct dentry *dentry) +{ + debugfs_create_file("parent_id", 0644, dentry, hw, &sci_parent_id_fops); +} +#else +static void sci_clk_debug_init(struct clk_hw *hw, struct dentry *dentry) +{ +} +#endif + static const struct clk_ops sci_clk_ops = { .prepare = sci_clk_prepare, .unprepare = sci_clk_unprepare, @@ -263,6 +307,7 @@ static const struct clk_ops sci_clk_ops = { .set_rate = sci_clk_set_rate, .get_parent = sci_clk_get_parent, .set_parent = sci_clk_set_parent, + .debug_init = sci_clk_debug_init, }; /**