This patch fixes the freescale spi driver for CPM. Without this patch SPI on CPM failed because cpm_muram_alloc_fixed tries to allocate muram in an preserved area. The error reported was:
mpc8xxx_spi f0011a80.spi: can't allocate spi parameter ram mpc8xxx_spi: probe of f0011a80.spi failed with error -12 Now the driver uses of_iomap to get access to this area similar to i2c driver driver in the i2c-cpm.c which has a similar device tree node. This is tested on a MPC8247 with CPM2. Signed-off-by: Holger Brunck <holger.bru...@keymile.com> cc: Grant Likely <grant.lik...@secretlab.ca> cc: spi-devel-gene...@lists.sourceforge.net --- This was the same problem reported and discussed on ppc-dev for CPM1: http://lists.ozlabs.org/pipermail/linuxppc-dev/2010-September/085739.html drivers/spi/spi_fsl_spi.c | 28 +++++++++++----------------- 1 files changed, 11 insertions(+), 17 deletions(-) diff --git a/drivers/spi/spi_fsl_spi.c b/drivers/spi/spi_fsl_spi.c index 7963c9b..ca57edf 100644 --- a/drivers/spi/spi_fsl_spi.c +++ b/drivers/spi/spi_fsl_spi.c @@ -684,7 +684,7 @@ static unsigned long fsl_spi_cpm_get_pram(struct mpc8xxx_spi *mspi) struct device_node *np = dev->of_node; const u32 *iprop; int size; - unsigned long spi_base_ofs; + void __iomem *spi_base; unsigned long pram_ofs = -ENOMEM; /* Can't use of_address_to_resource(), QE muram isn't at 0. */ @@ -702,33 +702,27 @@ static unsigned long fsl_spi_cpm_get_pram(struct mpc8xxx_spi *mspi) return pram_ofs; } - /* CPM1 and CPM2 pram must be at a fixed addr. */ - if (!iprop || size != sizeof(*iprop) * 4) - return -ENOMEM; - - spi_base_ofs = cpm_muram_alloc_fixed(iprop[2], 2); - if (IS_ERR_VALUE(spi_base_ofs)) - return -ENOMEM; + spi_base = of_iomap(np, 1); + if (spi_base == NULL) + return -EINVAL; if (mspi->flags & SPI_CPM2) { pram_ofs = cpm_muram_alloc(SPI_PRAM_SIZE, 64); - if (!IS_ERR_VALUE(pram_ofs)) { - u16 __iomem *spi_base = cpm_muram_addr(spi_base_ofs); - - out_be16(spi_base, pram_ofs); - } + out_be16(spi_base, pram_ofs); } else { - struct spi_pram __iomem *pram = cpm_muram_addr(spi_base_ofs); + struct spi_pram __iomem *pram = spi_base; u16 rpbase = in_be16(&pram->rpbase); /* Microcode relocation patch applied? */ if (rpbase) pram_ofs = rpbase; - else - return spi_base_ofs; + else { + pram_ofs = cpm_muram_alloc(SPI_PRAM_SIZE, 64); + out_be16(spi_base, pram_ofs); + } } - cpm_muram_free(spi_base_ofs); + iounmap(spi_base); return pram_ofs; } -- 1.7.1 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
