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mtd: spi-nor: fsl-quadspi: reset the module in the probe 

The uboot may run the QuadSpi controler with command:
    #sf probe

So we should reset the module in the probe.
This patch also clear the pending interrupts which arised by the uboot
code.

Signed-off-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Frank Li <Frank.Li@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Frank Li 2015-08-04 10:26:10 -05:00 committed by Brian Norris
parent 5cc66cb734
commit 8b8319c8b7
1 changed files with 8 additions and 0 deletions
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8
drivers/mtd/spi-nor/fsl-quadspi.c
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@ -716,6 +716,11 @@ static int fsl_qspi_nor_setup(struct fsl_qspi *q)
if (ret)
return ret;
/* Reset the module */
writel(QUADSPI_MCR_SWRSTSD_MASK | QUADSPI_MCR_SWRSTHD_MASK,
base + QUADSPI_MCR);
udelay(1);
/* Init the LUT table. */
fsl_qspi_init_lut(q);
@ -733,6 +738,9 @@ static int fsl_qspi_nor_setup(struct fsl_qspi *q)
writel(QUADSPI_MCR_RESERVED_MASK | QUADSPI_MCR_END_CFG_MASK,
base + QUADSPI_MCR);
/* clear all interrupt status */
writel(0xffffffff, q->iobase + QUADSPI_FR);
/* enable the interrupt */
writel(QUADSPI_RSER_TFIE, q->iobase + QUADSPI_RSER);