From patchwork Wed Jan 14 18:42:38 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Sylwester Nawrocki/Kernel \\(PLT\\) /SRPOL/Staff Engineer/Samsung Electronics" X-Patchwork-Id: 5634841 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 1E8299F357 for ; Wed, 14 Jan 2015 19:01:51 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 40F2E201BB for ; Wed, 14 Jan 2015 19:01:46 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 408B5201B9 for ; Wed, 14 Jan 2015 19:01:45 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YBTAL-0003qB-K2; Wed, 14 Jan 2015 18:59:41 +0000 Received: from mailout2.samsung.com ([203.254.224.25]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YBSvC-0005dM-9i for linux-arm-kernel@lists.infradead.org; Wed, 14 Jan 2015 18:44:03 +0000 Received: from epcpsbgm1.samsung.com (epcpsbgm1 [203.254.230.26]) by mailout2.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0NI600BO9K13PVA0@mailout2.samsung.com> for linux-arm-kernel@lists.infradead.org; Thu, 15 Jan 2015 03:43:51 +0900 (KST) X-AuditID: cbfee61a-f79c06d000004e71-95-54b6b8e7b8d2 Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm1.samsung.com (EPCPMTA) with SMTP id 29.82.20081.7E8B6B45; Thu, 15 Jan 2015 03:43:51 +0900 (KST) Received: from amdc1344.digital.local ([106.116.147.32]) by mmp1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0NI600JMDJZE6P20@mmp1.samsung.com>; Thu, 15 Jan 2015 03:43:51 +0900 (KST) From: Sylwester Nawrocki To: broonie@kernel.org, kgene@kernel.org Subject: [PATCH V3 11/15] ASoC: samsung: i2s: Add clk provider DT binding documentation Date: Wed, 14 Jan 2015 19:42:38 +0100 Message-id: <1421260962-16892-12-git-send-email-s.nawrocki@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1421260962-16892-1-git-send-email-s.nawrocki@samsung.com> References: <1421260962-16892-1-git-send-email-s.nawrocki@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrKLMWRmVeSWpSXmKPExsVy+t9jAd3nO7aFGCzaamRx5eIhJoupD5+w Wcw/co7V4tH8x8wW/Y9fM1tsenyN1WLG+X1MFr9vfmezOPymndXi4oovTA5cHhs+N7F5LPqe 5bFpVSebx+Yl9R59W1YxenzeJBfAFsVlk5Kak1mWWqRvl8CVsfXCNpaCZomKBQ+/sDYw/hbu YuTkkBAwkfjQ+YENwhaTuHBvPZDNxSEksIhR4v3J7SwQTgeTxO6/fxlBqtgEDCV6j/aB2SIC GhJbNr5lAiliFvjKKPF/ai8LSEJYIFJi0rs5YEUsAqoSvxsfMncxcnDwCrhL/FivDWJKCChI zJlkA1LBCRS9fO4uE4gtJOAm8f7Sd9YJjLwLGBlWMYqmFiQXFCel5xrqFSfmFpfmpesl5+du YgQH3jOpHYwrGywOMQpwMCrx8Doc2RoixJpYVlyZe4hRgoNZSYR31ZZtIUK8KYmVValF+fFF pTmpxYcYpTlYlMR5lezbQoQE0hNLUrNTUwtSi2CyTBycUg2MC8TuWXsVL1+tMuG4lInAyo75 RWb+5S9t+jMKZ1+/02YSKLl6icLkxnsfYs93OJ1c0ydnMnGV+48PIrXPaiz4PpzzVnjj9Czk bcahuYqKnU37kta5XpD4UpbDb/CdZf33Ry8WnV1Uf7vgTb5+1LGvIjnvHDZxWIcZi0xduJlD MbaZtfmd4Bd/JZbijERDLeai4kQAqdRB2zgCAAA= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150114_104402_510309_630A92BC X-CRM114-Status: GOOD ( 12.24 ) X-Spam-Score: -5.0 (-----) Cc: devicetree@vger.kernel.org, alsa-devel@alsa-project.org, linux-samsung-soc@vger.kernel.org, padma.v@samsung.com, sbkim73@samsung.com, drake@endlessm.com, Sylwester Nawrocki , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The new DT properties required for the I2S device node to be referred as a clock provider and corresponding clock indices definition is added. Signed-off-by: Sylwester Nawrocki --- .../devicetree/bindings/sound/samsung-i2s.txt | 22 ++++++++++++++++++++ include/dt-bindings/sound/samsung-i2s.h | 8 +++++++ 2 files changed, 30 insertions(+) create mode 100644 include/dt-bindings/sound/samsung-i2s.h diff --git a/Documentation/devicetree/bindings/sound/samsung-i2s.txt b/Documentation/devicetree/bindings/sound/samsung-i2s.txt index d188296..09e0e18 100644 --- a/Documentation/devicetree/bindings/sound/samsung-i2s.txt +++ b/Documentation/devicetree/bindings/sound/samsung-i2s.txt @@ -33,6 +33,25 @@ Required SoC Specific Properties: "iis" is the i2s bus clock and i2s_opclk0, i2s_opclk1 are sources of the root clk. i2s0 has internal mux to select the source of root clk and i2s1 and i2s2 doesn't have any such mux. +- #clock-cells: should be 1, this property must be present if the I2S device + is a clock provider in terms of the common clock bindings, described in + ../clock/clock-bindings.txt. +- clock-output-names: from the common clock bindings, names of the CDCLK + I2S output clocks, suggested values are "i2s_cdclk0", "i2s_cdclk1", + "i2s_cdclk3" for the I2S0, I2S1, I2S2 devices recpectively. + +There are following clocks available at the I2S device nodes: + CLK_I2S_CDCLK - the CDCLK (CODECLKO) gate clock, + CLK_I2S_RCLK_PSR - the RCLK prescaler divider clock (corresponding to the + IISPSR register), + CLK_I2S_RCLK_SRC - the RCLKSRC mux clock (corresponding to RCLKSRC bit in + IISMOD register). + +Refer to the SoC datasheet for availability of the above clocks. +The CLK_I2S_RCLK_PSR and CLK_I2S_RCLK_SRC clocks are usually only available +in the IIS Multi Audio Interface (I2S0). +Note: Old DTs may not have the #clock-cells, clock-output-names properties +and then not use the I2S node as a clock supplier. Optional SoC Specific Properties: @@ -41,6 +60,7 @@ Optional SoC Specific Properties: - pinctrl-0: Should specify pin control groups used for this controller. - pinctrl-names: Should contain only one value - "default". + Example: i2s0: i2s@03830000 { @@ -54,6 +74,8 @@ i2s0: i2s@03830000 { <&clock_audss EXYNOS_I2S_BUS>, <&clock_audss EXYNOS_SCLK_I2S>; clock-names = "iis", "i2s_opclk0", "i2s_opclk1"; + #clock-cells; + clock-output-names = "i2s_cdclk0"; samsung,idma-addr = <0x03000000>; pinctrl-names = "default"; pinctrl-0 = <&i2s0_bus>; diff --git a/include/dt-bindings/sound/samsung-i2s.h b/include/dt-bindings/sound/samsung-i2s.h new file mode 100644 index 0000000..0c69818d --- /dev/null +++ b/include/dt-bindings/sound/samsung-i2s.h @@ -0,0 +1,8 @@ +#ifndef _DT_BINDINGS_SAMSUNG_I2S_H +#define _DT_BINDINGS_SAMSUNG_I2S_H + +#define CLK_I2S_CDCLK 0 +#define CLK_I2S_RCLK_SRC 1 +#define CLK_I2S_RCLK_PSR 2 + +#endif /* _DT_BINDINGS_SAMSUNG_I2S_H */