ARM: S3C: CPUFREQ: Add debugfs support for cpufreq

[deliverable/linux.git] / arch / arm / plat-s3c24xx / s3c2410-iotiming.c

diff --git a/arch/arm/plat-s3c24xx/s3c2410-iotiming.c b/arch/arm/plat-s3c24xx/s3c2410-iotiming.c
index 26fe2129cf25a1358650f22ed53e433d7d5139af..d0a3a145cd4dda8fa48584f35f771c89cad348ab 100644 (file)
--- a/arch/arm/plat-s3c24xx/s3c2410-iotiming.c
+++ b/arch/arm/plat-s3c24xx/s3c2410-iotiming.c
@@ -15,6 +15,7 @@
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/cpufreq.h>
+#include <linux/seq_file.h>
 #include <linux/io.h>
 
 #include <mach/map.h>
@@ -303,6 +304,50 @@ void s3c2410_iotiming_getbank(struct s3c_cpufreq_config *cfg,
        bt->tacc = get_tacc(hclk, bankcon >> S3C2410_BANKCON_Tacc_SHIFT);
 }
 
+/**
+ * s3c2410_iotiming_debugfs - debugfs show io bank timing information
+ * @seq: The seq_file to write output to using seq_printf().
+ * @cfg: The current configuration.
+ * @iob: The IO bank information to decode.
+ */
+void s3c2410_iotiming_debugfs(struct seq_file *seq,
+                             struct s3c_cpufreq_config *cfg,
+                             union s3c_iobank *iob)
+{
+       struct s3c2410_iobank_timing *bt = iob->io_2410;
+       unsigned long bankcon = bt->bankcon;
+       unsigned long hclk = cfg->freq.hclk_tns;
+       unsigned int tacs;
+       unsigned int tcos;
+       unsigned int tacc;
+       unsigned int tcoh;
+       unsigned int tcah;
+
+       seq_printf(seq, "BANKCON=0x%08lx\n", bankcon);
+
+       tcah = get_0124(hclk, bankcon >> S3C2410_BANKCON_Tcah_SHIFT);
+       tcoh = get_0124(hclk, bankcon >> S3C2410_BANKCON_Tcoh_SHIFT);
+       tcos = get_0124(hclk, bankcon >> S3C2410_BANKCON_Tcos_SHIFT);
+       tacs = get_0124(hclk, bankcon >> S3C2410_BANKCON_Tacs_SHIFT);
+       tacc = get_tacc(hclk, bankcon >> S3C2410_BANKCON_Tacc_SHIFT);
+
+       seq_printf(seq,
+                  "\tRead: Tacs=%d.%d, Tcos=%d.%d, Tacc=%d.%d, Tcoh=%d.%d, Tcah=%d.%d\n",
+                  print_ns(bt->tacs),
+                  print_ns(bt->tcos),
+                  print_ns(bt->tacc),
+                  print_ns(bt->tcoh),
+                  print_ns(bt->tcah));
+
+       seq_printf(seq,
+                  "\t Set: Tacs=%d.%d, Tcos=%d.%d, Tacc=%d.%d, Tcoh=%d.%d, Tcah=%d.%d\n",
+                  print_ns(tacs),
+                  print_ns(tcos),
+                  print_ns(tacc),
+                  print_ns(tcoh),
+                  print_ns(tcah));
+}
+
 /**
  * s3c2410_iotiming_calc - Calculate bank timing for frequency change.
  * @cfg: The frequency configuration