From patchwork Wed Sep 11 10:46:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Bruel X-Patchwork-Id: 13800216 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 70B06EE4991 for ; Wed, 11 Sep 2024 10:57:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:CC:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=q+QeicHCp2ZWykwX9Szi74CPZHnZAUYBRGjXyMFb5hk=; b=3MtvZreRlIC70fVHXTiWndd62a ZM8Nrp3OzOl+kk6wDbMAUkcU9Fa4k8bmr7RTE9K5EI+PrkyVMk+Vzprn8D3t4hD650/vjKpucaOWv iskd7dwFhKZCUn0qYWEFQe79y05cislnov8gC+LCgmcKWyU95P2/4iwqry+Xr6yPg7X3/hPsltplm SJDOBBuCslUpMCu6bFBRp6gfyk9judsHa9bJTqkiDII9XMz5hGf2LV4xc+Ay+RcHu3FPjkn7kXfxE 3KpyTyyOlxFCsY92AVKLPYi03hkFbH8rQr462s99mgQB9Ns73Z6kQjHb+Wfvs14cowo2OLEKZCWEr 8/5Ag22w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1soL2D-00000009CEi-155c; Wed, 11 Sep 2024 10:57:17 +0000 Received: from mx08-00178001.pphosted.com ([91.207.212.93]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1soKwJ-00000009AX0-2BlV; Wed, 11 Sep 2024 10:51:20 +0000 Received: from pps.filterd (m0369457.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 48B76L49029417; Wed, 11 Sep 2024 12:51:04 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=selector1; bh= q+QeicHCp2ZWykwX9Szi74CPZHnZAUYBRGjXyMFb5hk=; b=nyapZwvJdZwJqguP VlLAX08BVEgUzEzYcCVkV+3lr13N0DVZsz34LrvIYjAutc6kcSQ7i9RiQdRCmzhj VyohcdYblKG6joPl9vOOCfyd+qGS55tQ3qX1slXSoz4bLpfTkKaV0Gl1sWzTClFW IFvDoJ6Y92g3KtVP9AafhCcSHdW86lironQDOXtYbYTGot3M4Ru86eJIqEZj5/s7 Jygwf3+wb+s/Fbi8loOai9qYYEJUOQVXTUGUNR7YXiSQrBGswIVR4xUWI1NyRfiT lMVHwlQ3GXWzQq7WS0sfKLK6cUASHNqxrMgBPgDaZDilIqflO3VCeVHqUEWscFsR ofmN4w== Received: from beta.dmz-ap.st.com (beta.dmz-ap.st.com [138.198.100.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 41h1sge3dr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 11 Sep 2024 12:51:04 +0200 (MEST) Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-ap.st.com (STMicroelectronics) with ESMTP id D5C9B40072; Wed, 11 Sep 2024 12:49:44 +0200 (CEST) Received: from Webmail-eu.st.com (shfdag1node3.st.com [10.75.129.71]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 8DE0F25C591; Wed, 11 Sep 2024 12:47:00 +0200 (CEST) Received: from localhost (10.129.178.212) by SHFDAG1NODE3.st.com (10.75.129.71) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.37; Wed, 11 Sep 2024 12:47:00 +0200 From: Christian Bruel To: , , , , , , , CC: , , , , , , Christian Bruel Subject: [PATCH v8 1/5] dt-bindings: phy: Add STM32MP25 COMBOPHY bindings Date: Wed, 11 Sep 2024 12:46:42 +0200 Message-ID: <20240911104646.2980821-2-christian.bruel@foss.st.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240911104646.2980821-1-christian.bruel@foss.st.com> References: <20240911104646.2980821-1-christian.bruel@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.129.178.212] X-ClientProxiedBy: EQNCAS1NODE4.st.com (10.75.129.82) To SHFDAG1NODE3.st.com (10.75.129.71) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240911_035111_898655_6BA4F174 X-CRM114-Status: GOOD ( 15.73 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Document the bindings for STM32 COMBOPHY interface, used to support the PCIe and USB3 stm32mp25 drivers. Following entries can be used to tune caracterisation parameters - st,output-micro-ohms and st,output-vswing-microvolt bindings entries to tune the impedance and voltage swing using discrete simulation results - st,rx-equalizer register to set the internal rx equalizer filter value. Reviewed-by: Rob Herring (Arm) Signed-off-by: Christian Bruel --- .../bindings/phy/st,stm32mp25-combophy.yaml | 119 ++++++++++++++++++ 1 file changed, 119 insertions(+) create mode 100644 Documentation/devicetree/bindings/phy/st,stm32mp25-combophy.yaml diff --git a/Documentation/devicetree/bindings/phy/st,stm32mp25-combophy.yaml b/Documentation/devicetree/bindings/phy/st,stm32mp25-combophy.yaml new file mode 100644 index 000000000000..a2e82c0bb56b --- /dev/null +++ b/Documentation/devicetree/bindings/phy/st,stm32mp25-combophy.yaml @@ -0,0 +1,119 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/phy/st,stm32mp25-combophy.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: STMicroelectronics STM32MP25 USB3/PCIe COMBOPHY + +maintainers: + - Christian Bruel + +description: + Single lane PHY shared (exclusive) between the USB3 and PCIe controllers. + Supports 5Gbit/s for USB3 and PCIe gen2 or 2.5Gbit/s for PCIe gen1. + +properties: + compatible: + const: st,stm32mp25-combophy + + reg: + maxItems: 1 + + "#phy-cells": + const: 1 + + clocks: + minItems: 2 + items: + - description: apb Bus clock mandatory to access registers. + - description: ker Internal RCC reference clock for USB3 or PCIe + - description: pad Optional on board clock input for PCIe only. Typically an + external 100Mhz oscillator wired on dedicated CLKIN pad. Used as reference + clock input instead of the ker + + clock-names: + minItems: 2 + items: + - const: apb + - const: ker + - const: pad + + resets: + maxItems: 1 + + reset-names: + const: phy + + power-domains: + maxItems: 1 + + wakeup-source: true + + interrupts: + maxItems: 1 + description: interrupt used for wakeup + + access-controllers: + maxItems: 1 + description: Phandle to the rifsc device to check access right. + + st,ssc-on: + $ref: /schemas/types.yaml#/definitions/flag + description: + A property whose presence indicates that the Spread Spectrum Clocking is active. + + st,rx-equalizer: + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 0 + maximum: 7 + default: 2 + description: + A 3 bit value to tune the RX fixed equalizer setting for optimal eye compliance + + st,output-micro-ohms: + minimum: 3999000 + maximum: 6090000 + default: 4968000 + description: + A value property to tune the Single Ended Output Impedance, simulations results + at 25C for a VDDP=0.8V. The hardware accepts discrete values in this range. + + st,output-vswing-microvolt: + minimum: 442000 + maximum: 803000 + default: 803000 + description: + A value property in microvolt to tune the Single Ended Output Voltage Swing to change the + Vlo, Vhi for a VDDP = 0.8V. The hardware accepts discrete values in this range. + +required: + - compatible + - reg + - "#phy-cells" + - clocks + - clock-names + - resets + - reset-names + +additionalProperties: false + +examples: + - | + #include + #include + #include + + phy@480c0000 { + compatible = "st,stm32mp25-combophy"; + reg = <0x480c0000 0x1000>; + #phy-cells = <1>; + clocks = <&rcc CK_BUS_USB3PCIEPHY>, <&rcc CK_KER_USB3PCIEPHY>; + clock-names = "apb", "ker"; + resets = <&rcc USB3PCIEPHY_R>; + reset-names = "phy"; + access-controllers = <&rifsc 67>; + power-domains = <&CLUSTER_PD>; + wakeup-source; + interrupts-extended = <&exti1 45 IRQ_TYPE_EDGE_FALLING>; + };