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drivers/fsi/gpio: Add tracepoints for GPIO master

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Trace low level input/output GPIO operations.

Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: Christopher Bostic <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Jeremy Kerr 2017-06-06 16:08:55 -05:00 • committed by Greg Kroah-Hartman
commit 1247cf7ab8
2 changed files with 77 additions and 0 deletions
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9
drivers/fsi/fsi-master-gpio.c
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@ -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);