From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756329AbaBRPBE (ORCPT ); Tue, 18 Feb 2014 10:01:04 -0500 Received: from mail-wg0-f52.google.com ([74.125.82.52]:62728 "EHLO mail-wg0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932272AbaBRO5g (ORCPT ); Tue, 18 Feb 2014 09:57:36 -0500 From: Lee Jones To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: lee.jones@linaro.org, DCG_UPD_stlinux_kernel@list.st.com, dwmw2@infradead.org, linux-mtd@lists.infradead.org, computersforpeace@gmail.com, Angus.Clark@st.com Subject: [PATCH 26/35] mtd: st_spi_fsm: Write to Flash via the FSM FIFO Date: Tue, 18 Feb 2014 14:55:53 +0000 Message-Id: <1392735362-1245-27-git-send-email-lee.jones@linaro.org> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1392735362-1245-1-git-send-email-lee.jones@linaro.org> References: <1392735362-1245-1-git-send-email-lee.jones@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When we write data to the FIFO the FSM Controller subsequently writes that data out to the Serial Flash chip. Acked-by Angus Clark Signed-off-by: Lee Jones --- drivers/mtd/devices/st_spi_fsm.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c index e4815fe..ea55548 100644 --- a/drivers/mtd/devices/st_spi_fsm.c +++ b/drivers/mtd/devices/st_spi_fsm.c @@ -668,6 +668,20 @@ static void stfsm_read_fifo(struct stfsm *fsm, uint32_t *buf, } } +static int stfsm_write_fifo(struct stfsm *fsm, + const uint32_t *buf, const uint32_t size) +{ + uint32_t words = size >> 2; + + dev_dbg(fsm->dev, "writing %d bytes to FIFO\n", size); + + BUG_ON((((uint32_t)buf) & 0x3) || (size & 0x3)); + + writesl(fsm->base + SPI_FAST_SEQ_DATA_REG, buf, words); + + return size; +} + static int stfsm_enter_32bit_addr(struct stfsm *fsm, int enter) { struct stfsm_seq *seq = &stfsm_seq_en_32bit_addr; -- 1.8.3.2