Commit 041cb624 authored by Sylvain Munaut's avatar Sylvain Munaut Committed by Linus Torvalds
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[PATCH] ppc32: Fix MPC52xx PCI init in cas the bootloader didn't do it

We were counting on the bootloader to init some stuff, like get the bus out of
reset and enable accesses.
Signed-off-by: default avatarSylvain Munaut <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent db674ed4
......@@ -154,9 +154,12 @@ static struct pci_ops mpc52xx_pci_ops = {
static void __init
mpc52xx_pci_setup(struct mpc52xx_pci __iomem *pci_regs)
u32 tmp;
/* Setup control regs */
/* Nothing to do afaik */
tmp = in_be32(&pci_regs->scr);
out_be32(&pci_regs->scr, tmp);
/* Setup windows */
out_be32(&pci_regs->iw0btar, MPC52xx_PCI_IWBTAR_TRANSLATION(
......@@ -197,13 +200,12 @@ mpc52xx_pci_setup(struct mpc52xx_pci __iomem *pci_regs)
/* Not necessary and can be a bad thing if for example the bootloader
is displaying a splash screen or ... Just left here for
documentation purpose if anyone need it */
#if 0
u32 tmp;
tmp = in_be32(&pci_regs->gscr);
#if 0
out_be32(&pci_regs->gscr, tmp | MPC52xx_PCI_GSCR_PR);
out_be32(&pci_regs->gscr, tmp);
out_be32(&pci_regs->gscr, tmp & ~MPC52xx_PCI_GSCR_PR);
static void
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