On the MPC85xx CDS we have two issues:
1. The device tree fixup code did not check to see if the property we are trying to update is actually found. Its possible that it would update random memory starting at 0.
2. Newer Linux kernel's have moved the location of the PCI nodes to be sibilings of the soc node and not children. The explicit PATH to the PCI node would not be found for these device trees. Add the ability to handle both paths. In the future we shouldn't handle such fixups by explicit path.
Signed-off-by: Kumar Gala galak@kernel.crashing.org ---
This is a fix that really needs to go into 1.3.0. We've seen a number of issues pop up because of this. Randy Vinson pointed me at this code being at fault for an issue in which ramdisks didn't work with newer kernels/device trees.
board/cds/common/ft_board.c | 23 +++++++++++++++-------- include/configs/MPC8541CDS.h | 1 + include/configs/MPC8548CDS.h | 1 + include/configs/MPC8555CDS.h | 1 + 4 files changed, 18 insertions(+), 8 deletions(-)
diff --git a/board/cds/common/ft_board.c b/board/cds/common/ft_board.c index 9d97905..3eda100 100644 --- a/board/cds/common/ft_board.c +++ b/board/cds/common/ft_board.c @@ -37,17 +37,24 @@ static void cds_pci_fixup(void *blob)
map = ft_get_prop(blob, "/" OF_SOC "/pci@8000/interrupt-map", &len);
- len /= sizeof(u32); + if (!map) + map = ft_get_prop(blob, "/" OF_PCI "/interrupt-map", &len);
- slot = get_pci_slot(); + if (map) { + len /= sizeof(u32);
- for (i=0;i<len;i+=7) { - /* We rotate the interrupt pins so that the mapping - * changes depending on the slot the carrier card is in. - */ - map[3] = ((map[3] + slot - 2) % 4) + 1; + slot = get_pci_slot();
- map+=7; + for (i=0;i<len;i+=7) { + /* We rotate the interrupt pins so that the mapping + * changes depending on the slot the carrier card is in. + */ + map[3] = ((map[3] + slot - 2) % 4) + 1; + + map+=7; + } + } else { + printf("*** Warning - No PCI node found\n"); } } #endif diff --git a/include/configs/MPC8541CDS.h b/include/configs/MPC8541CDS.h index 4e061bd..8dda665 100644 --- a/include/configs/MPC8541CDS.h +++ b/include/configs/MPC8541CDS.h @@ -316,6 +316,7 @@ extern unsigned long get_clock_freq(void); #define OF_SOC "soc8541@e0000000" #define OF_TBCLK (bd->bi_busfreq / 8) #define OF_STDOUT_PATH "/soc8541@e0000000/serial@4600" +#define OF_PCI "pci@e0008000"
/* * I2C diff --git a/include/configs/MPC8548CDS.h b/include/configs/MPC8548CDS.h index 6083715..4edc7fd 100644 --- a/include/configs/MPC8548CDS.h +++ b/include/configs/MPC8548CDS.h @@ -340,6 +340,7 @@ extern unsigned long get_clock_freq(void); #define OF_SOC "soc8548@e0000000" #define OF_TBCLK (bd->bi_busfreq / 8) #define OF_STDOUT_PATH "/soc8548@e0000000/serial@4600" +#define OF_PCI "pci@e0008000"
/* * I2C diff --git a/include/configs/MPC8555CDS.h b/include/configs/MPC8555CDS.h index 1d1b7c9..c414bf0 100644 --- a/include/configs/MPC8555CDS.h +++ b/include/configs/MPC8555CDS.h @@ -316,6 +316,7 @@ extern unsigned long get_clock_freq(void); #define OF_SOC "soc8555@e0000000" #define OF_TBCLK (bd->bi_busfreq / 8) #define OF_STDOUT_PATH "/soc8555@e0000000/serial@4600" +#define OF_PCI "pci@e0008000"
/* * I2C