diff options
| -rw-r--r-- | arch/x86/Kconfig | 13 | ||||
| -rw-r--r-- | arch/x86/kernel/iosf_mbi.c | 23 |
2 files changed, 32 insertions, 4 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index d6334f489214..6354964ff949 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -496,6 +496,19 @@ config IOSF_MBI You should say Y if you are running a kernel on one of these SoC's. +config IOSF_MBI_DEBUG + bool "Enable IOSF sideband access through debugfs" + depends on IOSF_MBI && DEBUG_FS + ---help--- + Select this option to expose the IOSF sideband access registers (MCR, + MDR, MCRX) through debugfs to write and read register information from + different units on the SoC. This is most useful for obtaining device + state information for debug and analysis. As this is a general access + mechanism, users of this option would have specific knowledge of the + device they want to access. + + If you don't require the option or are in doubt, say N. + config X86_RDC321X bool "RDC R-321x SoC" depends on X86_32 diff --git a/arch/x86/kernel/iosf_mbi.c b/arch/x86/kernel/iosf_mbi.c index e01f7414b5e7..82f8d02f0df2 100644 --- a/arch/x86/kernel/iosf_mbi.c +++ b/arch/x86/kernel/iosf_mbi.c @@ -190,7 +190,7 @@ bool iosf_mbi_available(void) } EXPORT_SYMBOL(iosf_mbi_available); -/********************** debugfs begin ****************************/ +#ifdef CONFIG_IOSF_MBI_DEBUG static u32 dbg_mdr; static u32 dbg_mcr; static u32 dbg_mcrx; @@ -229,6 +229,7 @@ static int mcr_set(void *data, u64 val) DEFINE_SIMPLE_ATTRIBUTE(iosf_mcr_fops, mcr_get, mcr_set , "%llx\n"); static struct dentry *iosf_dbg; + static void iosf_sideband_debug_init(void) { struct dentry *d; @@ -257,7 +258,20 @@ static void iosf_sideband_debug_init(void) cleanup: debugfs_remove_recursive(d); } -/********************** debugfs end ****************************/ + +static void iosf_debugfs_init(void) +{ + iosf_sideband_debug_init(); +} + +static void iosf_debugfs_remove(void) +{ + debugfs_remove_recursive(iosf_dbg); +} +#else +static inline void iosf_debugfs_init(void) { } +static inline void iosf_debugfs_remove(void) { } +#endif /* CONFIG_IOSF_MBI_DEBUG */ static int iosf_mbi_probe(struct pci_dev *pdev, const struct pci_device_id *unused) @@ -290,13 +304,14 @@ static struct pci_driver iosf_mbi_pci_driver = { static int __init iosf_mbi_init(void) { - iosf_sideband_debug_init(); + iosf_debugfs_init(); + return pci_register_driver(&iosf_mbi_pci_driver); } static void __exit iosf_mbi_exit(void) { - debugfs_remove_recursive(iosf_dbg); + iosf_debugfs_remove(); pci_unregister_driver(&iosf_mbi_pci_driver); if (mbi_pdev) { |