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| author | Lee Jones <lee.jones@linaro.org> | 2015-03-18 17:21:19 +0000 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2015-03-25 16:39:17 +0100 |
| commit | a8381faca5ec90b7eea94ce575e90af86e2c9a9e (patch) | |
| tree | 193a81ee1748b416e1cca6760114d17003029f02 /drivers/pinctrl/pinctrl-st.c | |
| parent | e2ed0e88ecba59775a25b3cc237eed1faf71a9aa (diff) | |
| download | lwn-a8381faca5ec90b7eea94ce575e90af86e2c9a9e.tar.gz lwn-a8381faca5ec90b7eea94ce575e90af86e2c9a9e.zip | |
pinctrl: st: Display pin's function when printing pinctrl debug information
Great for easily determining which mode a pin is operating in.
This patch was particularly helpful when debugging a recent GPIO/
Pinctrl disparity issue.
Before:
$ cat /sys/kernel/debug/pinctrl/<pin-controller>/pinconf-pins
pin 33 (PIO4[1]):[OE:0,PU:0,OD:0]
[retime:0,invclk:0,clknotdat:0,de:0,rt-clk:0,rt-delay:0]
After [GPIO]:
$ cat /sys/kernel/debug/pinctrl/<pin-controller>/pinconf-pins
pin 33 (PIO4[1]):[OE:0,PU:0,OD:0] GPIO
[retime:0,invclk:0,clknotdat:0,de:0,rt-clk:0,rt-delay:0]
After [Alt]:
$ cat /sys/kernel/debug/pinctrl/<pin-controller>/pinconf-pins
pin 33 (PIO4[1]):[OE:0,PU:0,OD:0] Alt Fn 2
[retime:0,invclk:0,clknotdat:0,de:0,rt-clk:0,rt-delay:0]
Acked-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-st.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-st.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/pinctrl/pinctrl-st.c b/drivers/pinctrl/pinctrl-st.c index 1cda40e013c1..b80ccc74a213 100644 --- a/drivers/pinctrl/pinctrl-st.c +++ b/drivers/pinctrl/pinctrl-st.c @@ -1058,18 +1058,28 @@ static void st_pinconf_dbg_show(struct pinctrl_dev *pctldev, { struct st_pio_control *pc; unsigned long config; + unsigned int function; int offset = st_gpio_pin(pin_id); + char f[16]; mutex_unlock(&pctldev->mutex); pc = st_get_pio_control(pctldev, pin_id); st_pinconf_get(pctldev, pin_id, &config); mutex_lock(&pctldev->mutex); - seq_printf(s, "[OE:%ld,PU:%ld,OD:%ld]\n" + + function = st_pctl_get_pin_function(pc, offset); + if (function) + snprintf(f, 10, "Alt Fn %d", function); + else + snprintf(f, 5, "GPIO"); + + seq_printf(s, "[OE:%d,PU:%ld,OD:%ld]\t%s\n" "\t\t[retime:%ld,invclk:%ld,clknotdat:%ld," "de:%ld,rt-clk:%ld,rt-delay:%ld]", !st_gpio_get_direction(&pc_to_bank(pc)->gpio_chip, offset), ST_PINCONF_UNPACK_PU(config), ST_PINCONF_UNPACK_OD(config), + f, ST_PINCONF_UNPACK_RT(config), ST_PINCONF_UNPACK_RT_INVERTCLK(config), ST_PINCONF_UNPACK_RT_CLKNOTDATA(config), |