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[178.15.117.54]) by smtp.gmail.com with ESMTPSA id a6sm10351725eds.19.2019.07.21.22.57.14 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Sun, 21 Jul 2019 22:57:15 -0700 (PDT) From: shiva.linuxworks@gmail.com X-Google-Original-From: sshivamurthy@micron.com To: Miquel Raynal , Richard Weinberger , David Woodhouse , Brian Norris , Marek Vasut , Vignesh Raghavendra , Boris Brezillon , Marcel Ziswiler , Frieder Schrempf , Shivamurthy Shastri , linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, Jeff Kletsky , Chuanhong Guo , liaoweixiong Subject: [PATCH 8/8] mtd: spinand: micron: Enable micron flashes with multi-die Date: Mon, 22 Jul 2019 07:56:21 +0200 Message-Id: <20190722055621.23526-9-sshivamurthy@micron.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190722055621.23526-1-sshivamurthy@micron.com> References: <20190722055621.23526-1-sshivamurthy@micron.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Shivamurthy Shastri Some of the Micron flashes has multi-die, and need to select the die each time while accessing it. Signed-off-by: Shivamurthy Shastri --- drivers/mtd/nand/spi/micron.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/mtd/nand/spi/micron.c b/drivers/mtd/nand/spi/micron.c index 1e28ea3d1362..fa2b43caf39d 100644 --- a/drivers/mtd/nand/spi/micron.c +++ b/drivers/mtd/nand/spi/micron.c @@ -90,6 +90,19 @@ static int micron_ecc_get_status(struct spinand_device *spinand, return -EINVAL; } +static int micron_select_target(struct spinand_device *spinand, + unsigned int target) +{ + struct spi_mem_op op = SPINAND_SET_FEATURE_OP(0xd0, + spinand->scratchbuf); + + if (target == 1) + target = 0x40; + + *spinand->scratchbuf = target; + return spi_mem_exec_op(spinand->spimem, &op); +} + static int micron_spinand_detect(struct spinand_device *spinand) { const struct spi_mem_op *op; @@ -105,6 +118,7 @@ static int micron_spinand_detect(struct spinand_device *spinand) spinand->flags = 0; spinand->eccinfo.get_status = micron_ecc_get_status; spinand->eccinfo.ooblayout = µn_ooblayout_ops; + spinand->select_target = micron_select_target; op = spinand_select_op_variant(spinand, &read_cache_variants); -- 2.17.1