From patchwork Mon Jul 17 08:59:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Stein X-Patchwork-Id: 704900 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 9A444C001B0 for ; Mon, 17 Jul 2023 08:59:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230128AbjGQI7z (ORCPT ); Mon, 17 Jul 2023 04:59:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55826 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229658AbjGQI7x (ORCPT ); Mon, 17 Jul 2023 04:59:53 -0400 Received: from mx1.tq-group.com (mx1.tq-group.com [93.104.207.81]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AC7C2E58 for ; Mon, 17 Jul 2023 01:59:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tq-group.com; i=@tq-group.com; q=dns/txt; s=key1; t=1689584391; x=1721120391; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=pe+J8Ph/L1AS+x+SkGE3jMZdvxTA0GLnex7gb2D1+Xc=; b=EIBPagrKj66sKkgdyt2IbrUz2LZUBXFCS3Xjv15RkpzIwOxn//2qfJOF X43OAVx8ymqKq/fCMRu0sKCkiSO62Nzoa5Occ+SrFS/hQYo+MEgA0qb/C 0mhUL5AkRuWofu5KqOV+0/YqZp89ZenLpmmqH0DyyHU85n8xYGXmBvXfo myDUQFm0B9nJ0yl0IH10b5JrhlWXQydobx6aVGj/FQQuTmRO55eNQ3Qjc WCU+v4RDCeQ8v5Nupxaz7fV6rAFJWw87w9X1btlXZf2lhg8VbdJzPgdXx eZkeSYdrbajEbG483C41pALKBbLr592RHIR1U7Dbk9n9MzfGsu9uKWBwJ g==; X-IronPort-AV: E=Sophos;i="6.01,211,1684792800"; d="scan'208";a="31958425" Received: from vtuxmail01.tq-net.de ([10.115.0.20]) by mx1.tq-group.com with ESMTP; 17 Jul 2023 10:59:47 +0200 Received: from steina-w.tq-net.de (unknown [10.123.53.21]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by vtuxmail01.tq-net.de (Postfix) with ESMTPSA id 37BEE280085; Mon, 17 Jul 2023 10:59:47 +0200 (CEST) From: Alexander Stein To: Mark Brown Cc: Alexander Stein , linux-spi@vger.kernel.org Subject: [PATCH v2 3/3] spi: spi-fsl-lpspi: Read chip-select amount from hardware for i.MX93 Date: Mon, 17 Jul 2023 10:59:34 +0200 Message-Id: <20230717085934.409476-3-alexander.stein@ew.tq-group.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230717085934.409476-1-alexander.stein@ew.tq-group.com> References: <20230717085934.409476-1-alexander.stein@ew.tq-group.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org PARAM.PCSNUM register on i.MX93 indicates the number of supported (hw) chip-selects. LPSPI4 has 3 while others have only 2. Still allow overwriting from DT. Signed-off-by: Alexander Stein --- Changes in v2: * Rebase to next-20230717 (no change on the diff though) drivers/spi/spi-fsl-lpspi.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c index f3b7bb1e52eb..e32e8cab5aa8 100644 --- a/drivers/spi/spi-fsl-lpspi.c +++ b/drivers/spi/spi-fsl-lpspi.c @@ -896,8 +896,12 @@ static int fsl_lpspi_probe(struct platform_device *pdev) fsl_lpspi->txfifosize = 1 << (temp & 0x0f); fsl_lpspi->rxfifosize = 1 << ((temp >> 8) & 0x0f); if (of_property_read_u32((&pdev->dev)->of_node, "num-cs", - &num_cs)) - num_cs = 1; + &num_cs)) { + if (of_device_is_compatible(pdev->dev.of_node, "fsl,imx93-spi")) + num_cs = ((temp >> 16) & 0xf); + else + num_cs = 1; + } controller->bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 32); controller->transfer_one = fsl_lpspi_transfer_one;