From ab9a4183fddf232a46b6255e0d3da5a09f85ecbd Mon Sep 17 00:00:00 2001 From: Alistair Popple Date: Thu, 9 May 2013 10:42:13 +1000 Subject: [PATCH] powerpc: Update currituck pci/usb fixup for new board revision The currituck board uses a different IRQ for the pci usb host controller depending on the board revision. This patch adds support for newer board revisions by retrieving the board revision from the FPGA and mapping the appropriate IRQ. Signed-off-by: Alistair Popple Acked-by: Tony Breeds Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/boot/dts/currituck.dts | 5 ++++ arch/powerpc/platforms/44x/currituck.c | 39 ++++++++++++++++++++++++-- 2 files changed, 42 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/boot/dts/currituck.dts b/arch/powerpc/boot/dts/currituck.dts index b801dd06e573..d2c8a872308e 100644 --- a/arch/powerpc/boot/dts/currituck.dts +++ b/arch/powerpc/boot/dts/currituck.dts @@ -103,6 +103,11 @@ interrupts = <34 2>; }; + FPGA0: fpga@50000000 { + compatible = "ibm,currituck-fpga"; + reg = <0x50000000 0x4>; + }; + IIC0: i2c@00000000 { compatible = "ibm,iic-currituck", "ibm,iic"; reg = <0x0 0x00000014>; diff --git a/arch/powerpc/platforms/44x/currituck.c b/arch/powerpc/platforms/44x/currituck.c index ecd3890c40d7..c52e1b3c9be5 100644 --- a/arch/powerpc/platforms/44x/currituck.c +++ b/arch/powerpc/platforms/44x/currituck.c @@ -176,13 +176,48 @@ static int __init ppc47x_probe(void) return 1; } +static int board_rev = -1; +static int __init ppc47x_get_board_rev(void) +{ + u8 fpga_reg0; + void *fpga; + struct device_node *np; + + np = of_find_compatible_node(NULL, NULL, "ibm,currituck-fpga"); + if (!np) + goto fail; + + fpga = of_iomap(np, 0); + of_node_put(np); + if (!fpga) + goto fail; + + fpga_reg0 = ioread8(fpga); + board_rev = fpga_reg0 & 0x03; + pr_info("%s: Found board revision %d\n", __func__, board_rev); + iounmap(fpga); + return 0; + +fail: + pr_info("%s: Unable to find board revision\n", __func__); + return 0; +} +machine_arch_initcall(ppc47x, ppc47x_get_board_rev); + /* Use USB controller should have been hardware swizzled but it wasn't :( */ static void ppc47x_pci_irq_fixup(struct pci_dev *dev) { if (dev->vendor == 0x1033 && (dev->device == 0x0035 || dev->device == 0x00e0)) { - dev->irq = irq_create_mapping(NULL, 47); - pr_info("%s: Mapping irq 47 %d\n", __func__, dev->irq); + if (board_rev == 0) { + dev->irq = irq_create_mapping(NULL, 47); + pr_info("%s: Mapping irq %d\n", __func__, dev->irq); + } else if (board_rev == 2) { + dev->irq = irq_create_mapping(NULL, 49); + pr_info("%s: Mapping irq %d\n", __func__, dev->irq); + } else { + pr_alert("%s: Unknown board revision\n", __func__); + } } } -- 2.39.5