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-rw-r--r--sys/dev/pcf/pcf.c2
-rw-r--r--sys/dev/pcf/pcfvar.h2
2 files changed, 2 insertions, 2 deletions
diff --git a/sys/dev/pcf/pcf.c b/sys/dev/pcf/pcf.c
index e774812..55e0346 100644
--- a/sys/dev/pcf/pcf.c
+++ b/sys/dev/pcf/pcf.c
@@ -378,7 +378,7 @@ pcf_rst_card(device_t dev, u_char speed, u_char addr, u_char *oldaddr)
}
int
-pcf_write(device_t dev, char *buf, int len, int *sent, int timeout /* us */)
+pcf_write(device_t dev, const char *buf, int len, int *sent, int timeout /* us */)
{
struct pcf_softc *sc = DEVTOSOFTC(dev);
int bytes, error = 0;
diff --git a/sys/dev/pcf/pcfvar.h b/sys/dev/pcf/pcfvar.h
index 8e4d5d8..33721c9 100644
--- a/sys/dev/pcf/pcfvar.h
+++ b/sys/dev/pcf/pcfvar.h
@@ -135,7 +135,7 @@ pcf_get_S1(struct pcf_softc *sc)
extern int pcf_repeated_start(device_t, u_char, int);
extern int pcf_start(device_t, u_char, int);
extern int pcf_stop(device_t);
-extern int pcf_write(device_t, char *, int, int *, int);
+extern int pcf_write(device_t, const char *, int, int *, int);
extern int pcf_read(device_t, char *, int, int *, int, int);
extern int pcf_rst_card(device_t, u_char, u_char, u_char *);
extern driver_intr_t pcf_intr;
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