From patchwork Fri May 22 12:25:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Murphy X-Patchwork-Id: 218684 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.9 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD97BC433E3 for ; Fri, 22 May 2020 12:25:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BFE00206B6 for ; Fri, 22 May 2020 12:25:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="pCF7HzyN" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729488AbgEVMZq (ORCPT ); Fri, 22 May 2020 08:25:46 -0400 Received: from lelv0142.ext.ti.com ([198.47.23.249]:50844 "EHLO lelv0142.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728409AbgEVMZp (ORCPT ); Fri, 22 May 2020 08:25:45 -0400 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id 04MCPb7W047899; Fri, 22 May 2020 07:25:37 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1590150337; bh=ueLwNSWdW7G7o8r2V/BmW/+Am9ZadNjYbP9NBO55qA4=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=pCF7HzyNHQS4rUjirntQEJJASBq7IZYY9DD8AbK+Ah13RDJrKFmePrjkY7tf9ITuT PnF0pZxgb8uGmeBKOgL+lA+2B3OWUR1Xw7CjtqJrFY8CloXfNw58oXnXPkC2zYcLa3 3SQu3rlY4erYgyZSxeTU7Zye037rJQyFpaBdQJ1E= Received: from DLEE112.ent.ti.com (dlee112.ent.ti.com [157.170.170.23]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTP id 04MCPbeJ096431; Fri, 22 May 2020 07:25:37 -0500 Received: from DLEE102.ent.ti.com (157.170.170.32) by DLEE112.ent.ti.com (157.170.170.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Fri, 22 May 2020 07:25:37 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DLEE102.ent.ti.com (157.170.170.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Fri, 22 May 2020 07:25:37 -0500 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 04MCPbGY053280; Fri, 22 May 2020 07:25:37 -0500 From: Dan Murphy To: , , , , CC: , , , Dan Murphy Subject: [PATCH net-next v2 2/4] net: phy: Add a helper to return the index for of the internal delay Date: Fri, 22 May 2020 07:25:32 -0500 Message-ID: <20200522122534.3353-3-dmurphy@ti.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200522122534.3353-1-dmurphy@ti.com> References: <20200522122534.3353-1-dmurphy@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Add a helper function that will return the index in the array for the passed in internal delay value. The helper requires the array, size and delay value. The helper will then return the index for the exact match or return the index for the index to the closest smaller value. Signed-off-by: Dan Murphy --- drivers/net/phy/phy_device.c | 45 ++++++++++++++++++++++++++++++++++++ include/linux/phy.h | 2 ++ 2 files changed, 47 insertions(+) diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 7481135d27ab..40f53b379d2b 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -2661,6 +2661,51 @@ void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause) } EXPORT_SYMBOL(phy_get_pause); +/** + * phy_get_delay_index - returns the index of the internal delay + * @phydev: phy_device struct + * @delay_values: array of delays the PHY supports + * @size: the size of the delay array + * @delay: the delay to be looked up + * + * Returns the index within the array of internal delay passed in. + */ +int phy_get_delay_index(struct phy_device *phydev, int *delay_values, int size, + int delay) +{ + int i; + + if (size <= 0) + return -EINVAL; + + if (delay <= delay_values[0]) + return 0; + + if (delay > delay_values[size - 1]) + return size - 1; + + for (i = 0; i < size; i++) { + if (delay == delay_values[i]) + return i; + + /* Find an approximate index by looking up the table */ + if (delay > delay_values[i - 1] && + delay < delay_values[i]) { + if (delay - delay_values[i - 1] < delay_values[i] - delay) + return i - 1; + else + return i; + } + + } + + phydev_err(phydev, "error finding internal delay index for %d\n", + delay); + + return -EINVAL; +} +EXPORT_SYMBOL(phy_get_delay_index); + static bool phy_drv_supports_irq(struct phy_driver *phydrv) { return phydrv->config_intr && phydrv->ack_interrupt; diff --git a/include/linux/phy.h b/include/linux/phy.h index 2bcdf19ed3b4..73552612c189 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -1408,6 +1408,8 @@ void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx); bool phy_validate_pause(struct phy_device *phydev, struct ethtool_pauseparam *pp); void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause); +int phy_get_delay_index(struct phy_device *phydev, int *delay_values, + int size, int delay); void phy_resolve_pause(unsigned long *local_adv, unsigned long *partner_adv, bool *tx_pause, bool *rx_pause);