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| author | Alexander Shiyan <shc_work@mail.ru> | 2014-04-10 20:23:41 +0400 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2014-04-23 12:32:35 +0200 |
| commit | 6a40096a6c46b2ad31d97aba732a096bd9e6af76 (patch) | |
| tree | 4b830bdb032cf53a26af43437feea0893a99a747 /drivers/spi | |
| parent | e9ab71561b2bf166b175ab4af0784e7258bf1de4 (diff) | |
| download | barebox-6a40096a6c46b2ad31d97aba732a096bd9e6af76.tar.gz barebox-6a40096a6c46b2ad31d97aba732a096bd9e6af76.tar.xz | |
spi: i.MX: Simplify cspi_0_0_init()
Use SPI module software reset to simplify cspi_0_0_init().
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/imx_spi.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/drivers/spi/imx_spi.c b/drivers/spi/imx_spi.c index 6675729314..4e43725879 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) |