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drivers/fsi/gpio: Add tracepoints for GPIO master 

Trace low level input/output GPIO operations.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jeremy Kerr 2017-06-06 16:08:55 -05:00 committed by Greg Kroah-Hartman
parent ac0385d9f6
commit 1247cf7ab8
2 changed files with 77 additions and 0 deletions
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9
drivers/fsi/fsi-master-gpio.c
View File

@ -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);

68
include/trace/events/fsi_master_gpio.h Normal file
View File

@ -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>