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intel_pmc_core: Convert to DEFINE_DEBUGFS_ATTRIBUTE

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Refactor the code to use the recently introduced
DEFINE_DEBUGFS_ATTRIBUTE() macro to eliminate boilerplate code.
Make the absence of DEBUG_FS a non-fatal error.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-and-tested-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
This commit is contained in:
Andy Shevchenko 2016-07-04 15:39:48 +03:00 committed by Darren Hart
parent 696789343b
commit df2294fb64
2 changed files with 11 additions and 37 deletions
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45
drivers/platform/x86/intel_pmc_core.c
View File

@ -23,7 +23,6 @@
#include <linux/init.h>
#include <linux/io.h>
#include <linux/pci.h>
#include <linux/seq_file.h>
#include <asm/cpu_device_id.h>
#include <asm/pmc_core.h>
@ -77,30 +76,18 @@ int intel_pmc_slp_s0_counter_read(u32 *data)
}
EXPORT_SYMBOL_GPL(intel_pmc_slp_s0_counter_read);
#if IS_ENABLED(CONFIG_DEBUG_FS)
static int pmc_core_dev_state_show(struct seq_file *s, void *unused)
static int pmc_core_dev_state_get(void *data, u64 *val)
{
struct pmc_dev *pmcdev = s->private;
u32 counter_val;
struct pmc_dev *pmcdev = data;
u32 value;
counter_val = pmc_core_reg_read(pmcdev,
SPT_PMC_SLP_S0_RES_COUNTER_OFFSET);
seq_printf(s, "%u\n", pmc_core_adjust_slp_s0_step(counter_val));
value = pmc_core_reg_read(pmcdev, SPT_PMC_SLP_S0_RES_COUNTER_OFFSET);
*val = pmc_core_adjust_slp_s0_step(value);
return 0;
}
static int pmc_core_dev_state_open(struct inode *inode, struct file *file)
{
return single_open(file, pmc_core_dev_state_show, inode->i_private);
}
static const struct file_operations pmc_core_dev_state_ops = {
.open = pmc_core_dev_state_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
DEFINE_DEBUGFS_ATTRIBUTE(pmc_core_dev_state, pmc_core_dev_state_get, NULL, "%llu\n");
static void pmc_core_dbgfs_unregister(struct pmc_dev *pmcdev)
{
@ -112,12 +99,12 @@ static int pmc_core_dbgfs_register(struct pmc_dev *pmcdev)
struct dentry *dir, *file;
dir = debugfs_create_dir("pmc_core", NULL);
if (!dir)
if (IS_ERR_OR_NULL(dir))
return -ENOMEM;
pmcdev->dbgfs_dir = dir;
file = debugfs_create_file("slp_s0_residency_usec", S_IFREG | S_IRUGO,
dir, pmcdev, &pmc_core_dev_state_ops);
dir, pmcdev, &pmc_core_dev_state);
if (!file) {
pmc_core_dbgfs_unregister(pmcdev);
@ -126,16 +113,6 @@ static int pmc_core_dbgfs_register(struct pmc_dev *pmcdev)
return 0;
}
#else
static inline int pmc_core_dbgfs_register(struct pmc_dev *pmcdev)
{
return 0;
}
static inline void pmc_core_dbgfs_unregister(struct pmc_dev *pmcdev)
{
}
#endif /* CONFIG_DEBUG_FS */
static const struct x86_cpu_id intel_pmc_core_ids[] = {
{ X86_VENDOR_INTEL, 6, 0x4e, X86_FEATURE_MWAIT,
@ -182,10 +159,8 @@ static int pmc_core_probe(struct pci_dev *dev, const struct pci_device_id *id)
}
err = pmc_core_dbgfs_register(pmcdev);
if (err < 0) {
dev_err(&dev->dev, "PMC Core: debugfs register failed.\n");
return err;
}
if (err < 0)
dev_warn(&dev->dev, "PMC Core: debugfs register failed.\n");
pmc.has_slp_s0_res = true;
return 0;

3
drivers/platform/x86/intel_pmc_core.h
View File

@ -23,6 +23,7 @@
/* Sunrise Point Power Management Controller PCI Device ID */
#define SPT_PMC_PCI_DEVICE_ID 0x9d21
#define SPT_PMC_BASE_ADDR_OFFSET 0x48
#define SPT_PMC_SLP_S0_RES_COUNTER_OFFSET 0x13c
#define SPT_PMC_MMIO_REG_LEN 0x100
@ -42,9 +43,7 @@
struct pmc_dev {
u32 base_addr;
void __iomem *regbase;
#if IS_ENABLED(CONFIG_DEBUG_FS)
struct dentry *dbgfs_dir;
#endif /* CONFIG_DEBUG_FS */
bool has_slp_s0_res;
};