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authorBen Dooks <ben@simtec.co.uk>2009-07-30 23:23:42 +0100
committerBen Dooks <ben-linux@fluff.org>2009-07-30 23:22:56 +0100
commite6d197a6954c8a9ff85727c31ca61fc1da78628a (patch)
tree4f83b37f17499111ae9381746b3427996eb75007 /arch/arm/plat-s3c24xx/s3c2410-iotiming.c
parentdfff4e95d749c414af3f7350835139103408a50d (diff)
ARM: S3C: CPUFREQ: Add debugfs support for cpufreq
Add debugfs support for the cpufreq driver to allow information about the system state to be exported to the user. Signed-off-by: Ben Dooks <ben@simtec.co.uk> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'arch/arm/plat-s3c24xx/s3c2410-iotiming.c')
-rw-r--r--arch/arm/plat-s3c24xx/s3c2410-iotiming.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/arm/plat-s3c24xx/s3c2410-iotiming.c b/arch/arm/plat-s3c24xx/s3c2410-iotiming.c
index 26fe2129cf2..d0a3a145cd4 100644
--- 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>
@@ -304,6 +305,50 @@ void s3c2410_iotiming_getbank(struct s3c_cpufreq_config *cfg,
}
/**
+ * 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
* @iot: The IO timing information to fill out.