diff options
| author | Simon Glass <sjg@chromium.org> | 2019-09-25 08:11:37 -0600 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2019-10-08 13:57:35 +0800 |
| commit | e46d00c77cd5a756e8cf3fae3b34eaa9ec012f0d (patch) | |
| tree | 58c30da507427e14050714578ca4338d82584424 /arch/x86/cpu/pci.c | |
| parent | 1eeb55755f4d50a9954d17cbb6f98b3285a9b976 (diff) | |
x86: pci: Add a function to clear and set PCI config regs
At present the x86 pre-DM equivalent of pci_bus_clrset_config32() does not
exist. Add it to simplify PCI init code on x86.
Also add the missing functions to this header.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'arch/x86/cpu/pci.c')
| -rw-r--r-- | arch/x86/cpu/pci.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/x86/cpu/pci.c b/arch/x86/cpu/pci.c index c6218250e16..0ccde194d9a 100644 --- a/arch/x86/cpu/pci.c +++ b/arch/x86/cpu/pci.c @@ -16,6 +16,10 @@ #include <asm/io.h> #include <asm/pci.h> +/* + * TODO(sjg@chromium.org): Drop the first parameter from each of these + * functions since it is not used. + */ int pci_x86_read_config(struct udevice *bus, pci_dev_t bdf, uint offset, ulong *valuep, enum pci_size_t size) { @@ -54,6 +58,21 @@ int pci_x86_write_config(struct udevice *bus, pci_dev_t bdf, uint offset, return 0; } +int pci_x86_clrset_config(struct udevice *bus, pci_dev_t bdf, uint offset, + ulong clr, ulong set, enum pci_size_t size) +{ + ulong value; + int ret; + + ret = pci_x86_read_config(bus, bdf, offset, &value, size); + if (ret) + return ret; + value &= ~clr; + value |= set; + + return pci_x86_write_config(bus, bdf, offset, value, size); +} + void pci_assign_irqs(int bus, int device, u8 irq[4]) { pci_dev_t bdf; |