From mboxrd@z Thu Jan 1 00:00:00 1970 From: lee.jones@linaro.org (Lee Jones) Date: Tue, 25 Mar 2014 08:19:55 +0000 Subject: [RFC 38/47] mtd: nand: stm_nand_bch: check WP (FLEX) In-Reply-To: <1395735604-26706-1-git-send-email-lee.jones@linaro.org> References: <1395735604-26706-1-git-send-email-lee.jones@linaro.org> Message-ID: <1395735604-26706-39-git-send-email-lee.jones@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Return status of the Write Protect bit for the NAND device. Signed-off-by: Lee Jones --- drivers/mtd/nand/stm_nand_bch.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/mtd/nand/stm_nand_bch.c b/drivers/mtd/nand/stm_nand_bch.c index 3853e7a..18601e5 100644 --- a/drivers/mtd/nand/stm_nand_bch.c +++ b/drivers/mtd/nand/stm_nand_bch.c @@ -543,6 +543,22 @@ static void flex_addr(struct nandi_controller *nandi, writel(addr, nandi->base + NANDHAM_FLEX_ADD); } +/* + * Hamming-FLEX operations (optimised replacements for nand_base.c versions) + */ +static int flex_check_wp(struct nandi_controller *nandi) +{ + uint8_t status; + + emiss_nandi_select(STM_NANDI_HAMMING); + + flex_cmd(nandi, NAND_CMD_STATUS); + + status = (uint8_t)(readl(nandi->base + NANDHAM_FLEX_DATA) & 0xff); + + return status & NAND_STATUS_WP ? 0 : 1; +} + static int flex_read_raw(struct nandi_controller *nandi, uint32_t page_addr, uint32_t col_addr, -- 1.8.3.2