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drivers/linuxgpiod: add led 

Bitbang interface allows having a LED on one of the GPIO.

Let also linuxgpiod driver to specify and use the LED connection.

Change-Id: Id3d8772ee1808b92354fd073ba3947bacd8253ef
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/5770
Tested-by: jenkins
This commit is contained in:
Antonio Borneo 2020-04-04 19:46:38 +02:00
parent d62b3c51df
commit 9b32a06dad
2 changed files with 41 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
src/jtag/drivers/linuxgpiod.c
View File

@ -27,6 +27,7 @@ static int trst_gpio = -1;
static int srst_gpio = -1;
static int swclk_gpio = -1;
static int swdio_gpio = -1;
static int led_gpio = -1;
static int gpiochip = -1;
static struct gpiod_chip *gpiod_chip;
@ -38,6 +39,7 @@ static struct gpiod_line *gpiod_trst;
static struct gpiod_line *gpiod_swclk;
static struct gpiod_line *gpiod_swdio;
static struct gpiod_line *gpiod_srst;
static struct gpiod_line *gpiod_led;
static int last_swclk;
static int last_swdio;
@ -171,13 +173,26 @@ static int linuxgpiod_swd_write(int swclk, int swdio)
return ERROR_OK;
}
static int linuxgpiod_blink(int on)
{
int retval;
if (!gpiod_led)
return ERROR_OK;
retval = gpiod_line_set_value(gpiod_led, on);
if (retval < 0)
LOG_WARNING("Fail set led");
return retval;
}
static struct bitbang_interface linuxgpiod_bitbang = {
.read = linuxgpiod_read,
.write = linuxgpiod_write,
.swdio_read = linuxgpiod_swdio_read,
.swdio_drive = linuxgpiod_swdio_drive,
.swd_write = linuxgpiod_swd_write,
.blink = NULL,
.blink = linuxgpiod_blink,
};
/*
@ -248,6 +263,7 @@ static inline void helper_release(struct gpiod_line *line)
static int linuxgpiod_quit(void)
{
helper_release(gpiod_led);
helper_release(gpiod_srst);
helper_release(gpiod_swdio);
helper_release(gpiod_swclk);
@ -370,6 +386,12 @@ static int linuxgpiod_init(void)
goto out_error;
}
if (is_gpio_valid(led_gpio)) {
gpiod_led = helper_get_output_line("led", led_gpio, 0);
if (gpiod_led == NULL)
goto out_error;
}
return ERROR_OK;
out_error:
@ -484,6 +506,15 @@ COMMAND_HANDLER(linuxgpiod_handle_swd_gpionum_swdio)
return ERROR_OK;
}
COMMAND_HANDLER(linuxgpiod_handle_gpionum_led)
{
if (CMD_ARGC == 1)
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], led_gpio);
command_print(CMD, "LinuxGPIOD num: led = %d", led_gpio);
return ERROR_OK;
}
COMMAND_HANDLER(linuxgpiod_handle_gpiochip)
{
if (CMD_ARGC == 1)
@ -564,6 +595,13 @@ static const struct command_registration linuxgpiod_command_handlers[] = {
.help = "gpio number for swdio.",
.usage = "swdio",
},
{
.name = "linuxgpiod_led_num",
.handler = linuxgpiod_handle_gpionum_led,
.mode = COMMAND_CONFIG,
.help = "gpio number for LED.",
.usage = "led",
},
{
.name = "linuxgpiod_gpiochip",
.handler = linuxgpiod_handle_gpiochip,

2
tcl/interface/dln-2-gpiod.cfg
View File

@ -11,6 +11,7 @@
# | TMS/SWDIO | J3.4 (PA3) | 3 |
# | TDI | J3.5 (PA4) | 4 |
# | nTRST | J3.6 (PA5) | 5 |
# | LED | J3.7 (PA6) | 6 |
# | GND | J3.12 (GND) | |
# +-----------+-------------+-------------+
@ -21,5 +22,6 @@ linuxgpiod_jtag_nums 2 3 4 1
linuxgpiod_trst_num 5
linuxgpiod_swd_nums 2 3
linuxgpiod_srst_num 0
linuxgpiod_led_num 6
reset_config trst_and_srst separate srst_push_pull