From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from smtp36.i.mail.ru ([94.100.177.96]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WYHlz-0005jw-DK for barebox@lists.infradead.org; Thu, 10 Apr 2014 16:24:31 +0000 From: Alexander Shiyan Date: Thu, 10 Apr 2014 20:23:41 +0400 Message-Id: <1397147022-20116-1-git-send-email-shc_work@mail.ru> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 1/2] spi: i.MX: Simplify cspi_0_0_init() To: barebox@lists.infradead.org Use SPI module software reset to simplify cspi_0_0_init(). Signed-off-by: Alexander Shiyan --- drivers/spi/imx_spi.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/drivers/spi/imx_spi.c b/drivers/spi/imx_spi.c index 45461bd..3c1ba61 100644 --- a/drivers/spi/imx_spi.c +++ b/drivers/spi/imx_spi.c @@ -67,6 +67,8 @@ #define CSPI_0_0_TEST_LBC (1 << 14) +#define CSPI_0_0_RESET_START (1 << 0) + #define CSPI_0_7_RXDATA 0x00 #define CSPI_0_7_TXDATA 0x04 #define CSPI_0_7_CTRL 0x08 @@ -197,13 +199,9 @@ static void cspi_0_0_init(struct imx_spi *imx) { void __iomem *base = imx->regs; - writel(CSPI_0_0_CTRL_ENABLE | CSPI_0_0_CTRL_MASTER, - base + CSPI_0_0_CTRL); - writel(CSPI_0_0_PERIOD_32KHZ, - base + CSPI_0_0_PERIOD); - while (readl(base + CSPI_0_0_INT) & CSPI_0_0_STAT_RR) - readl(base + CSPI_0_0_RXDATA); - writel(0, base + CSPI_0_0_INT); + writel(CSPI_0_0_RESET_START, base + CSPI_0_0_RESET); + do { + } while (readl(base + CSPI_0_0_RESET) & CSPI_0_0_RESET_START); } static unsigned int cspi_0_7_xchg_single(struct imx_spi *imx, unsigned int data) -- 1.8.3.2 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox