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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2022-11-04 16:49:16 +0100
committerHans de Goede <hdegoede@redhat.com>2022-11-07 12:33:49 +0100
commit53eb64c88f17b14b324fbdfd417f56c5d3fa6fee (patch)
tree2e9f5eb0889db028f8cddc7f7f425e4d06ec8da8 /drivers/platform/x86/p2sb.c
parentplatform/x86/intel/hid: Add some ACPI device IDs (diff)
downloadlinux-53eb64c88f17b14b324fbdfd417f56c5d3fa6fee.tar.xz
linux-53eb64c88f17b14b324fbdfd417f56c5d3fa6fee.zip
platform/x86: p2sb: Don't fail if unknown CPU is found
We have accessing P2SB from a very few places for quite known hardware. When a new SoC appears in intel-family.h it's not obvious that it needs to be added to p2sb.c as well. Instead, provide default BDF and refactor p2sb_get_devfn() to always succeed. If in the future we would need to exclude something, we may add a list of unsupported IDs. Without this change the iTCO on Intel Comet Lake SoCs became unavailable: i801_smbus 0000:00:1f.4: failed to create iTCO device Fixes: 5c7b9167ddf8 ("i2c: i801: convert to use common P2SB accessor") Reported-and-tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20221104154916.35231-1-andriy.shevchenko@linux.intel.com Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to '')
-rw-r--r--drivers/platform/x86/p2sb.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/drivers/platform/x86/p2sb.c b/drivers/platform/x86/p2sb.c
index 384d0962ae93..1cf2471d54dd 100644
--- a/drivers/platform/x86/p2sb.c
+++ b/drivers/platform/x86/p2sb.c
@@ -19,26 +19,23 @@
#define P2SBC 0xe0
#define P2SBC_HIDE BIT(8)
+#define P2SB_DEVFN_DEFAULT PCI_DEVFN(31, 1)
+
static const struct x86_cpu_id p2sb_cpu_ids[] = {
X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT, PCI_DEVFN(13, 0)),
- X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT_D, PCI_DEVFN(31, 1)),
- X86_MATCH_INTEL_FAM6_MODEL(ATOM_SILVERMONT_D, PCI_DEVFN(31, 1)),
- X86_MATCH_INTEL_FAM6_MODEL(KABYLAKE, PCI_DEVFN(31, 1)),
- X86_MATCH_INTEL_FAM6_MODEL(KABYLAKE_L, PCI_DEVFN(31, 1)),
- X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE, PCI_DEVFN(31, 1)),
- X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE_L, PCI_DEVFN(31, 1)),
{}
};
static int p2sb_get_devfn(unsigned int *devfn)
{
+ unsigned int fn = P2SB_DEVFN_DEFAULT;
const struct x86_cpu_id *id;
id = x86_match_cpu(p2sb_cpu_ids);
- if (!id)
- return -ENODEV;
+ if (id)
+ fn = (unsigned int)id->driver_data;
- *devfn = (unsigned int)id->driver_data;
+ *devfn = fn;
return 0;
}