From patchwork Fri Apr 4 14:49:25 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thierry Reding X-Patchwork-Id: 3939071 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id B7D56BFF02 for ; Fri, 4 Apr 2014 14:53:17 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id DE7B020382 for ; Fri, 4 Apr 2014 14:53:16 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (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 B16FC2038D for ; Fri, 4 Apr 2014 14:53:15 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WW5Sp-0002T8-Gv; Fri, 04 Apr 2014 14:51:27 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WW5SV-0004nd-NZ; Fri, 04 Apr 2014 14:51:07 +0000 Received: from hqemgate16.nvidia.com ([216.228.121.65]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WW5S0-0004h2-Tb for linux-arm-kernel@lists.infradead.org; Fri, 04 Apr 2014 14:50:42 +0000 Received: from hqnvupgp08.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com id ; Fri, 04 Apr 2014 07:49:24 -0700 Received: from hqemhub01.nvidia.com ([172.20.12.94]) by hqnvupgp08.nvidia.com (PGP Universal service); Fri, 04 Apr 2014 07:45:38 -0700 X-PGP-Universal: processed; by hqnvupgp08.nvidia.com on Fri, 04 Apr 2014 07:45:38 -0700 Received: from deemhub01.nvidia.com (10.21.69.137) by hqemhub01.nvidia.com (172.20.150.30) with Microsoft SMTP Server (TLS) id 8.3.327.1; Fri, 4 Apr 2014 07:50:13 -0700 Received: from localhost (10.21.65.27) by deemhub01.nvidia.com (10.21.69.137) with Microsoft SMTP Server id 8.3.327.1; Fri, 4 Apr 2014 16:50:11 +0200 From: Thierry Reding To: Bjorn Helgaas , Stephen Warren , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala Subject: [RFC 1/5] PCI: tegra: Overhaul regulator usage Date: Fri, 4 Apr 2014 16:49:25 +0200 Message-ID: <1396622969-17837-2-git-send-email-treding@nvidia.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1396622969-17837-1-git-send-email-treding@nvidia.com> References: <1396622969-17837-1-git-send-email-treding@nvidia.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140404_105037_305299_BC3F20EB X-CRM114-Status: UNSURE ( 9.42 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.5 (--) Cc: linux-tegra@vger.kernel.org, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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 current usage of regulators for the Tegra PCIe block is wrong. It doesn't accurately reflect the actual supply inputs of the IP block and therefore isn't as flexible as it should be. Rectify this by describing all possible supply inputs in the device tree binding documentation and deprecate the old supply properties. Signed-off-by: Thierry Reding --- .../bindings/pci/nvidia,tegra20-pcie.txt | 35 ++++++++++++++++++++-- 1 file changed, 32 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt b/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt index c300391e8d3e..66e8aca4aef0 100644 --- a/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt +++ b/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt @@ -14,9 +14,6 @@ Required properties: - interrupt-names: Must include the following entries: "intr": The Tegra interrupt that is asserted for controller interrupts "msi": The Tegra interrupt that is asserted when an MSI is received -- pex-clk-supply: Supply voltage for internal reference clock -- vdd-supply: Power supply for controller (1.05V) -- avdd-supply: Power supply for controller (1.05V) (not required for Tegra20) - bus-range: Range of bus numbers associated with this controller - #address-cells: Address representation for root ports (must be 3) - cell 0 specifies the bus and device numbers of the root port: @@ -60,6 +57,38 @@ Required properties: - afi - pcie_x +Power supplies for Tegra20: +- avdd-pex-supply: Power supply for analog PCIe logic. Must supply 1.05 V. +- vdd-pex-supply: Power supply for digital PCIe I/O. Must supply 1.05 V. +- avdd-pex-pll-supply: Power supply for dedicated (internal) PCIe PLL. Must + supply 1.05 V. +- avdd-plle-supply: Power supply for PLLE, which is shared with SATA. Must + supply 1.05 V. +- vddio-pex-clk-supply: Power supply for PCIe clock. Must supply 3.3 V. + +Power supplies for Tegra30: +- Required: + - avdd-pex-pll-supply: Power supply for dedicated (internal) PCIe PLL. Must + supply 1.05 V. + - avdd-plle-supply: Power supply for PLLE, which is shared with SATA. Must + supply 1.05 V. + - vddio-pex-ctl-supply: Power supply for PCIe control I/O partition. Must + supply 1.8 V. + - hvdd-pex-supply: High-voltage supply for PCIe I/O and PCIe output clocks. + Must supply 3.3 V. +- Optional: + - If port 0 is enabled: + - avdd-pexa-supply: Power supply for analog PCIe logic. Must supply 1.05 V. + - vdd-pexa-supply: Power supply for digital PCIe I/O. Must supply 1.05 V. + - If at least one of ports 1 and 2 is enabled: + - avdd-pexb-supply: Power supply for analog PCIe logic. Must supply 1.05 V. + - vdd-pexb-supply: Power supply for digital PCIe I/O. Must supply 1.05 V. + +Deprecated supplies: +- pex-clk-supply: Supply voltage for internal reference clock +- vdd-supply: Power supply for controller (1.05V) +- avdd-supply: Power supply for controller (1.05V) (not required for Tegra20) + Root ports are defined as subnodes of the PCIe controller node. Required properties: