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[23.128.96.18]) by mx.google.com with ESMTP id c9si6876346edm.284.2020.09.21.04.30.53; Mon, 21 Sep 2020 04:31:17 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@yadro.com header.s=mta-01 header.b=CdBg3tvd; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=yadro.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726746AbgIUL3c (ORCPT + 99 others); Mon, 21 Sep 2020 07:29:32 -0400 Received: from mta-02.yadro.com ([89.207.88.252]:53644 "EHLO mta-01.yadro.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726522AbgIUL3b (ORCPT ); Mon, 21 Sep 2020 07:29:31 -0400 Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id DE4835750D; Mon, 21 Sep 2020 11:21:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :references:in-reply-to:x-mailer:message-id:date:date:subject :subject:from:from:received:received:received; s=mta-01; t= 1600687279; x=1602501680; bh=ii5ADmQuzyNneIFBkHAT3wYiVuvXA+hEUPb eRSzRgzU=; b=CdBg3tvdO4voY73ye3al1Mhr78debWUR32a8iZyjEB6Gj43LgAT lLQz78ZYukgD6obFMIznG15Ovat0SCx7288QpMVGfRpt07rN9njNdIqW4Xj+Xpj6 TtYRdf8uMD3Ja1bt0etSMBrWDxQPv4Ya2UXltOq+BIH5ZXuMyOuo5rM4= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id w6O96-ruWZsm; Mon, 21 Sep 2020 14:21:19 +0300 (MSK) Received: from T-EXCH-02.corp.yadro.com (t-exch-02.corp.yadro.com [172.17.10.102]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id 1C5BB535F4; Mon, 21 Sep 2020 14:21:18 +0300 (MSK) Received: from localhost.dev.yadro.com (10.199.3.38) by T-EXCH-02.corp.yadro.com (172.17.10.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Mon, 21 Sep 2020 14:21:18 +0300 From: Ivan Mikhaylov To: Tudor Ambarus , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra CC: Ivan Mikhaylov , , Subject: [RESEND PATCH 1/2] mtd: spi-nor: do not touch TB bit without SPI_NOR_HAS_TB Date: Mon, 21 Sep 2020 14:24:49 +0300 Message-ID: <20200921112450.4824-2-i.mikhaylov@yadro.com> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200921112450.4824-1-i.mikhaylov@yadro.com> References: <20200921112450.4824-1-i.mikhaylov@yadro.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.199.3.38] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-02.corp.yadro.com (172.17.10.102) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Some chips like macronix don't have TB(Top/Bottom protection) bit in the status register. Do not write tb_mask inside status register, unless SPI_NOR_HAS_TB is present for the chip. Signed-off-by: Ivan Mikhaylov --- drivers/mtd/spi-nor/core.c | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c index 0369d98b2d12..f9853dd566dc 100644 --- a/drivers/mtd/spi-nor/core.c +++ b/drivers/mtd/spi-nor/core.c @@ -1735,13 +1735,18 @@ static int spi_nor_sr_lock(struct spi_nor *nor, loff_t ofs, uint64_t len) return -EINVAL; } - status_new = (status_old & ~mask & ~tb_mask) | val; + if (nor->flags & SNOR_F_HAS_SR_TB) + status_new = (status_old & ~mask & ~tb_mask) | val; + else + status_new = (status_old & ~mask) | val; /* Disallow further writes if WP pin is asserted */ status_new |= SR_SRWD; - if (!use_top) - status_new |= tb_mask; + if (!use_top) { + if (nor->flags & SNOR_F_HAS_SR_TB) + status_new |= tb_mask; + } /* Don't bother if they're the same */ if (status_new == status_old) @@ -1817,14 +1822,19 @@ static int spi_nor_sr_unlock(struct spi_nor *nor, loff_t ofs, uint64_t len) return -EINVAL; } - status_new = (status_old & ~mask & ~tb_mask) | val; + if (nor->flags & SNOR_F_HAS_SR_TB) + status_new = (status_old & ~mask & ~tb_mask) | val; + else + status_new = (status_old & ~mask) | val; /* Don't protect status register if we're fully unlocked */ if (lock_len == 0) status_new &= ~SR_SRWD; - if (!use_top) - status_new |= tb_mask; + if (!use_top) { + if (nor->flags & SNOR_F_HAS_SR_TB) + status_new |= tb_mask; + } /* Don't bother if they're the same */ if (status_new == status_old) -- 2.21.1