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-rw-r--r--arch/powerpc/kernel/sysfs.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index c0d8c2006bf4..f0f2199e64e1 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -182,6 +182,41 @@ static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
182static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL); 182static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);
183static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr); 183static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);
184static SYSDEV_ATTR(purr, 0600, show_purr, store_purr); 184static SYSDEV_ATTR(purr, 0600, show_purr, store_purr);
185
186unsigned long dscr_default = 0;
187EXPORT_SYMBOL(dscr_default);
188
189static ssize_t show_dscr_default(struct sysdev_class *class,
190 struct sysdev_class_attribute *attr, char *buf)
191{
192 return sprintf(buf, "%lx\n", dscr_default);
193}
194
195static ssize_t __used store_dscr_default(struct sysdev_class *class,
196 struct sysdev_class_attribute *attr, const char *buf,
197 size_t count)
198{
199 unsigned long val;
200 int ret = 0;
201
202 ret = sscanf(buf, "%lx", &val);
203 if (ret != 1)
204 return -EINVAL;
205 dscr_default = val;
206
207 return count;
208}
209
210static SYSDEV_CLASS_ATTR(dscr_default, 0600,
211 show_dscr_default, store_dscr_default);
212
213static void sysfs_create_dscr_default(void)
214{
215 int err = 0;
216 if (cpu_has_feature(CPU_FTR_DSCR))
217 err = sysfs_create_file(&cpu_sysdev_class.kset.kobj,
218 &attr_dscr_default.attr);
219}
185#endif /* CONFIG_PPC64 */ 220#endif /* CONFIG_PPC64 */
186 221
187#ifdef HAS_PPC_PMC_PA6T 222#ifdef HAS_PPC_PMC_PA6T
@@ -617,6 +652,9 @@ static int __init topology_init(void)
617 if (cpu_online(cpu)) 652 if (cpu_online(cpu))
618 register_cpu_online(cpu); 653 register_cpu_online(cpu);
619 } 654 }
655#ifdef CONFIG_PPC64
656 sysfs_create_dscr_default();
657#endif /* CONFIG_PPC64 */
620 658
621 return 0; 659 return 0;
622} 660}