From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-lf0-x244.google.com ([2a00:1450:4010:c07::244]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cPYAy-000589-2s for linux-mtd@lists.infradead.org; Fri, 06 Jan 2017 17:19:37 +0000 Received: by mail-lf0-x244.google.com with SMTP id j75so6523725lfe.3 for ; Fri, 06 Jan 2017 09:19:15 -0800 (PST) From: Marcin Krzeminski To: cyrille.pitchen@atmel.com, marek.vasut@gmail.com, linux-mtd@lists.infradead.org Cc: dwmw2@infradead.org, computersforpeace@gmail.com, boris.brezillon@free-electrons.com, mar.krzeminski@gmail.com Subject: [PATCH v4 1/2] mtd: spi-nor: Fix whole chip erasing for stacked chips. Date: Fri, 6 Jan 2017 18:19:00 +0100 Message-Id: <20170106171901.27565-2-mar.krzeminski@gmail.com> In-Reply-To: <20170106171901.27565-1-mar.krzeminski@gmail.com> References: <20170106171901.27565-1-mar.krzeminski@gmail.com> List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Currently it is possible to disable chip erase for spi-nor driver. Some modern stacked (multi die) flash chips do not support chip erase opcode at all but spi-nor framework needs to cope with them too. This commit extends existing functionality to allow disable chip erase for a single flash chip. Signed-off-by: Marcin Krzeminski --- drivers/mtd/spi-nor/spi-nor.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c index 2a643a1..595de54 100644 --- a/drivers/mtd/spi-nor/spi-nor.c +++ b/drivers/mtd/spi-nor/spi-nor.c @@ -85,6 +85,7 @@ struct flash_info { * Use dedicated 4byte address op codes * to support memory size above 128Mib. */ +#define NO_CHIP_ERASE BIT(12) /* Chip does not support chip erase */ }; #define JEDEC_MFR(info) ((info)->id[0]) @@ -1621,6 +1622,8 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode) nor->flags |= SNOR_F_USE_FSR; if (info->flags & SPI_NOR_HAS_TB) nor->flags |= SNOR_F_HAS_SR_TB; + if (info->flags & NO_CHIP_ERASE) + nor->flags |= SNOR_F_NO_OP_CHIP_ERASE; #ifdef CONFIG_MTD_SPI_NOR_USE_4K_SECTORS /* prefer "small sector" erase if possible */ -- 2.9.3