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| author | Holger Brunck <holger.brunck@keymile.com> | 2011-06-20 18:31:57 +0200 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-07-05 11:59:17 -0600 |
| commit | fb6440955fcc5d175397fd0e9a00c6967cb26a74 (patch) | |
| tree | a5100e437776f5c20e8d9eedb67be5411c9dcdf4 /drivers/spi | |
| parent | c25ded1fbc069265e4d26df45a93ace18780974f (diff) | |
| download | linux-fb6440955fcc5d175397fd0e9a00c6967cb26a74.tar.bz2 | |
spi/fsl_spi: fix CPM spi driver
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.brunck@keymile.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | 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 e013117a404d..d2407558773f 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; } |