From: Jeremy Kerr <jk@xxxxxxxxxx>
Trace low level input/output GPIO operations.
Signed-off-by: Jeremy Kerr <jk@xxxxxxxxxx>
Signed-off-by: Christopher Bostic <cbostic@xxxxxxxxxxxxxxxxxx>
---
drivers/fsi/fsi-master-gpio.c | 9 +++++
include/trace/events/fsi_master_gpio.h | 68 ++++++++++++++++++++++++++++++++++
2 files changed, 77 insertions(+)
create mode 100644 include/trace/events/fsi_master_gpio.h
diff --git a/drivers/fsi/fsi-master-gpio.c b/drivers/fsi/fsi-master-gpio.c
index d467e61..a5d6e70 100644
--- a/drivers/fsi/fsi-master-gpio.c
+++ b/drivers/fsi/fsi-master-gpio.c
@@ -61,6 +61,9 @@ struct fsi_master_gpio {
struct gpio_desc *gpio_mux; /* Mux control */
};
+#define CREATE_TRACE_POINTS
+#include <trace/events/fsi_master_gpio.h>
+
#define to_fsi_master_gpio(m) container_of(m, struct fsi_master_gpio, master)
struct fsi_gpio_msg {
@@ -126,6 +129,8 @@ static void serial_in(struct fsi_master_gpio *master, struct fsi_gpio_msg *msg,
msg->msg |= ~in_bit & 0x1; /* Data is active low */
}
msg->bits += num_bits;
+
+ trace_fsi_master_gpio_in(master, num_bits, msg->msg);
}
static void serial_out(struct fsi_master_gpio *master,
@@ -137,6 +142,8 @@ static void serial_out(struct fsi_master_gpio *master,
uint64_t last_bit = ~0;
int next_bit;
+ trace_fsi_master_gpio_out(master, cmd->bits, cmd->msg);
+
if (!cmd->bits) {
dev_warn(master->dev, "trying to output 0 bits\n");
return;
@@ -458,6 +465,8 @@ static int fsi_master_gpio_break(struct fsi_master *_master, int link)
if (link != 0)
return -ENODEV;
+ trace_fsi_master_gpio_break(master);
+
set_sda_output(master, 1);
sda_out(master, 1);
clock_toggle(master, FSI_PRE_BREAK_CLOCKS);
diff --git a/include/trace/events/fsi_master_gpio.h b/include/trace/events/fsi_master_gpio.h
new file mode 100644
index 0000000..11b36c1
--- /dev/null
+++ b/include/trace/events/fsi_master_gpio.h
@@ -0,0 +1,68 @@
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM fsi_master_gpio
+
+#if !defined(_TRACE_FSI_MASTER_GPIO_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_FSI_MASTER_GPIO_H
+
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(fsi_master_gpio_in,
+ TP_PROTO(const struct fsi_master_gpio *master, int bits, uint64_t msg),
+ TP_ARGS(master, bits, msg),
+ TP_STRUCT__entry(
+ __field(int, master_idx)
+ __field(int, bits)
+ __field(uint64_t, msg)
+ ),
+ TP_fast_assign(
+ __entry->master_idx = master->master.idx;
+ __entry->bits = bits;
+ __entry->msg = msg & ((1ull<<bits) - 1);
+ ),
+ TP_printk("fsi-gpio%d => %0*llx[%d]",
+ __entry->master_idx,
+ (__entry->bits + 3) / 4,
+ __entry->msg,
+ __entry->bits
+ )
+);
+
+TRACE_EVENT(fsi_master_gpio_out,
+ TP_PROTO(const struct fsi_master_gpio *master, int bits, uint64_t msg),
+ TP_ARGS(master, bits, msg),
+ TP_STRUCT__entry(
+ __field(int, master_idx)
+ __field(int, bits)
+ __field(uint64_t, msg)
+ ),
+ TP_fast_assign(
+ __entry->master_idx = master->master.idx;
+ __entry->bits = bits;
+ __entry->msg = msg & ((1ull<<bits) - 1);
+ ),
+ TP_printk("fsi-gpio%d <= %0*llx[%d]",
+ __entry->master_idx,
+ (__entry->bits + 3) / 4,
+ __entry->msg,
+ __entry->bits
+ )
+);
+
+TRACE_EVENT(fsi_master_gpio_break,
+ TP_PROTO(const struct fsi_master_gpio *master),
+ TP_ARGS(master),
+ TP_STRUCT__entry(
+ __field(int, master_idx)
+ ),
+ TP_fast_assign(
+ __entry->master_idx = master->master.idx;
+ ),
+ TP_printk("fsi-gpio%d ----break---",
+ __entry->master_idx
+ )
+);
+
+#endif /* _TRACE_FSI_MASTER_GPIO_H */
+
+#include <trace/define_trace.h>
--
1.8.2.2
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