diff options
| -rw-r--r-- | drivers/spi/spi-fsl-qspi.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/spi/spi-fsl-qspi.c b/drivers/spi/spi-fsl-qspi.c index 2c030dd6facc..46a3187b3354 100644 --- a/drivers/spi/spi-fsl-qspi.c +++ b/drivers/spi/spi-fsl-qspi.c @@ -207,6 +207,7 @@ struct fsl_qspi_devtype_data { unsigned int txfifo; int invalid_mstrid; unsigned int ahb_buf_size; + unsigned int sfa_size; unsigned int quirks; bool little_endian; }; @@ -737,6 +738,7 @@ static int fsl_qspi_default_setup(struct fsl_qspi *q) { void __iomem *base = q->iobase; u32 reg, addr_offset = 0; + u32 sfa_size; int ret; /* disable and unprepare clock to avoid glitch pass to controller */ @@ -795,17 +797,17 @@ static int fsl_qspi_default_setup(struct fsl_qspi *q) * In HW there can be a maximum of four chips on two buses with * two chip selects on each bus. We use four chip selects in SW * to differentiate between the four chips. - * We use ahb_buf_size for each chip and set SFA1AD, SFA2AD, SFB1AD, - * SFB2AD accordingly. + * + * By default we write the AHB buffer size to each chip, but + * a different size can be specified with devtype_data->sfa_size. + * The SFA1AD, SFA2AD, SFB1AD, and SFB2AD registers define the + * top (end) of these four regions. */ - qspi_writel(q, q->devtype_data->ahb_buf_size + addr_offset, - base + QUADSPI_SFA1AD); - qspi_writel(q, q->devtype_data->ahb_buf_size * 2 + addr_offset, - base + QUADSPI_SFA2AD); - qspi_writel(q, q->devtype_data->ahb_buf_size * 3 + addr_offset, - base + QUADSPI_SFB1AD); - qspi_writel(q, q->devtype_data->ahb_buf_size * 4 + addr_offset, - base + QUADSPI_SFB2AD); + sfa_size = q->devtype_data->sfa_size ? : q->devtype_data->ahb_buf_size; + qspi_writel(q, addr_offset + 1 * sfa_size, base + QUADSPI_SFA1AD); + qspi_writel(q, addr_offset + 2 * sfa_size, base + QUADSPI_SFA2AD); + qspi_writel(q, addr_offset + 3 * sfa_size, base + QUADSPI_SFB1AD); + qspi_writel(q, addr_offset + 4 * sfa_size, base + QUADSPI_SFB2AD); q->selected = -1; |