Messages in this thread | | | Date | Wed, 18 Mar 2015 17:35:06 +0100 | From | Maxime Coquelin <> | Subject | Re: [STLinux Kernel] [PATCH 6/6] pinctrl: st: Display pin's function when printing pinctrl debug information |
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Hi Lee,
On 03/18/2015 11:51 AM, Lee Jones wrote: > 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] > > Signed-off-by: Lee Jones <lee.jones@linaro.org> > --- > drivers/pinctrl/pinctrl-st.c | 12 +++++++++++- > 1 file changed, 11 insertions(+), 1 deletion(-) A couple of comments below. Once fixed, you can add my: Acked-by: Maxime Coquelin <maxime.coquelin@st.com>
> > diff --git a/drivers/pinctrl/pinctrl-st.c b/drivers/pinctrl/pinctrl-st.c > index 1cda40e..d5b2ffa 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[64]; 64 bytes is way too big here > > 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) > + sprintf(f, "Alt Fn %d", function); Please use snprintf.
> + else > + sprintf(f, "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),
Thanks, Maxime
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