From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0E1D7C64EC5 for ; Mon, 6 Feb 2023 13:19:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230453AbjBFNTW (ORCPT ); Mon, 6 Feb 2023 08:19:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52672 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230401AbjBFNSj (ORCPT ); Mon, 6 Feb 2023 08:18:39 -0500 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BEE5923642 for ; Mon, 6 Feb 2023 05:17:43 -0800 (PST) Received: from gallifrey.ext.pengutronix.de ([2001:67c:670:201:5054:ff:fe8d:eefb] helo=bjornoya.blackshift.org) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1pP1NK-0008K9-K0 for netdev@vger.kernel.org; Mon, 06 Feb 2023 14:17:38 +0100 Received: from dspam.blackshift.org (localhost [127.0.0.1]) by bjornoya.blackshift.org (Postfix) with SMTP id BF0A4171474 for ; Mon, 6 Feb 2023 13:16:27 +0000 (UTC) Received: from hardanger.blackshift.org (unknown [172.20.34.65]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by bjornoya.blackshift.org (Postfix) with ESMTPS id 9A27E1712D4; Mon, 6 Feb 2023 13:16:23 +0000 (UTC) Received: from blackshift.org (localhost [::1]) by hardanger.blackshift.org (OpenSMTPD) with ESMTP id dfb7feff; Mon, 6 Feb 2023 13:16:22 +0000 (UTC) From: Marc Kleine-Budde To: netdev@vger.kernel.org Cc: davem@davemloft.net, kuba@kernel.org, linux-can@vger.kernel.org, kernel@pengutronix.de, Gerhard Uttenthaler , Marc Kleine-Budde Subject: [PATCH net-next 21/47] can: ems_pci: Deassert hardware reset Date: Mon, 6 Feb 2023 14:15:54 +0100 Message-Id: <20230206131620.2758724-22-mkl@pengutronix.de> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230206131620.2758724-1-mkl@pengutronix.de> References: <20230206131620.2758724-1-mkl@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 2001:67c:670:201:5054:ff:fe8d:eefb X-SA-Exim-Mail-From: mkl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: netdev@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Gerhard Uttenthaler The reset line from the Asix chip to the SJA1000 is asserted after boot up until it is deasserted by a register write Signed-off-by: Gerhard Uttenthaler Link: https://lore.kernel.org/all/20230120112616.6071-8-uttenthaler@ems-wuensche.com Signed-off-by: Marc Kleine-Budde --- drivers/net/can/sja1000/ems_pci.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/net/can/sja1000/ems_pci.c b/drivers/net/can/sja1000/ems_pci.c index 1f237acd7bd1..212d051c53c0 100644 --- a/drivers/net/can/sja1000/ems_pci.c +++ b/drivers/net/can/sja1000/ems_pci.c @@ -326,6 +326,14 @@ static int ems_pci_add_card(struct pci_dev *pdev, } } + if (card->version == 3) { + /* ASIX chip asserts local reset to CAN controllers + * after bootup until it is deasserted + */ + writel(readl(card->conf_addr + ASIX_LIEMR) & ~ASIX_LIEMR_LRST, + card->conf_addr + ASIX_LIEMR); + } + ems_pci_card_reset(card); /* Detect available channels */ -- 2.39.1