From patchwork Wed Aug 25 01:32:16 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Golle X-Patchwork-Id: 503242 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=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS autolearn=ham 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 95DA8C4338F for ; Wed, 25 Aug 2021 01:37:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7A8FB61220 for ; Wed, 25 Aug 2021 01:37:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232656AbhHYBiJ (ORCPT ); Tue, 24 Aug 2021 21:38:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33500 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231415AbhHYBiI (ORCPT ); Tue, 24 Aug 2021 21:38:08 -0400 Received: from fudo.makrotopia.org (fudo.makrotopia.org [IPv6:2a07:2ec0:3002::71]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CD84DC061757 for ; Tue, 24 Aug 2021 18:37:23 -0700 (PDT) Received: from local by fudo.makrotopia.org with esmtpsa (TLS1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.94.2) (envelope-from ) id 1mIhmE-0007rm-DA; Wed, 25 Aug 2021 03:32:25 +0200 Date: Wed, 25 Aug 2021 02:32:16 +0100 From: Daniel Golle To: linux-mediatek@lists.infradead.org, linux-wireless@vger.kernel.org Cc: Ryder Lee , Lorenzo Bianconi , Felix Fietkau , Matthias Brugger Subject: [PATCH 1/2] mt76: support reading EEPROM data embedded in fdt Message-ID: MIME-Version: 1.0 Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Some platforms boot from SD card and don't come with calibration data stored anywhere on the board. As EEPROM data is rather small it can be embedded into the device tree to be loaded from there by the mt76. Signed-off-by: Daniel Golle --- drivers/net/wireless/mediatek/mt76/eeprom.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/net/wireless/mediatek/mt76/eeprom.c b/drivers/net/wireless/mediatek/mt76/eeprom.c index 3b47e85e95e7c..01bc42dc71c26 100644 --- a/drivers/net/wireless/mediatek/mt76/eeprom.c +++ b/drivers/net/wireless/mediatek/mt76/eeprom.c @@ -15,6 +15,7 @@ int mt76_get_of_eeprom(struct mt76_dev *dev, void *eep, int offset, int len) struct device_node *np = dev->dev->of_node; struct mtd_info *mtd; const __be32 *list; + const void *data; const char *part; phandle phandle; int size; @@ -24,6 +25,16 @@ int mt76_get_of_eeprom(struct mt76_dev *dev, void *eep, int offset, int len) if (!np) return -ENOENT; + data = of_get_property(np, "mediatek,eeprom-data", &size); + if (data) { + if (size > len) + return -EINVAL; + + memcpy(eep, data, size); + + return 0; + } + list = of_get_property(np, "mediatek,mtd-eeprom", &size); if (!list) return -ENOENT;