Commit 39cc1d33 authored by Coiby Xu's avatar Coiby Xu Committed by Linus Walleij
Browse files

pinctrl: amd: print debounce filter info in debugfs 



Print the status of debounce filter as follows,

$ cat /sys/kernel/debug/gpio
pin129 interrupt is disabled | interrupt is masked |
  disable wakeup in S0i3 state | disable wakeup in S3 state |
  disable wakeup in S4/S5 state| input is high | pull-up is disabled |
  Pull-down is disabled | output is disabled |
  debouncing filter disabled | 0x50000

pin130 interrupt is disabled | interrupt is masked |
  disable wakeup in S0i3 state | disable wakeup in S3 state |
  disable wakeup in S4/S5 state | input is high | pull-up is disabled |
  Pull-down is disabled | output is disabled |
  debouncing filter (high) enabled |
  debouncing timeout is 124800 (us)| 0x503c8

Signed-off-by: default avatarCoiby Xu <coiby.xu@gmail.com>
Link: https://lore.kernel.org/r/20201105231912.69527-4-coiby.xu@gmail.com


Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 016e054d

drivers/pinctrl/pinctrl-amd.c

+41 −2
Original line number Diff line number Diff line
@@ -197,10 +197,16 @@ static int amd_gpio_set_config(struct gpio_chip *gc, unsigned offset, 
static void amd_gpio_dbg_show(struct seq_file *s, struct gpio_chip *gc)

{

	u32 pin_reg;

	u32 db_cntrl;

	unsigned long flags;

	unsigned int bank, i, pin_num;

	struct amd_gpio *gpio_dev = gpiochip_get_data(gc);



	bool tmr_out_unit;

	unsigned int time;

	unsigned int unit;

	bool tmr_large;



	char *level_trig;

	char *active_level;

	char *interrupt_enable;
@@ -214,6 +220,8 @@ static void amd_gpio_dbg_show(struct seq_file *s, struct gpio_chip *gc) 
	char *pull_down_enable;

	char *output_value;

	char *output_enable;

	char debounce_value[40];

	char *debounce_enable;



	for (bank = 0; bank < gpio_dev->hwbank_num; bank++) {

		seq_printf(s, "GPIO bank%d\t", bank);
@@ -327,13 +335,44 @@ static void amd_gpio_dbg_show(struct seq_file *s, struct gpio_chip *gc) 
					pin_sts = "input is low|";

			}



			db_cntrl = (DB_CNTRl_MASK << DB_CNTRL_OFF) & pin_reg;

			if (db_cntrl) {

				tmr_out_unit = pin_reg & BIT(DB_TMR_OUT_UNIT_OFF);

				tmr_large = pin_reg & BIT(DB_TMR_LARGE_OFF);

				time = pin_reg & DB_TMR_OUT_MASK;

				if (tmr_large) {

					if (tmr_out_unit)

						unit = 62500;

					else

						unit = 15625;

				} else {

					if (tmr_out_unit)

						unit = 244;

					else

						unit = 61;

				}

				if ((DB_TYPE_REMOVE_GLITCH << DB_CNTRL_OFF) == db_cntrl)

					debounce_enable = "debouncing filter (high and low) enabled|";

				else if ((DB_TYPE_PRESERVE_LOW_GLITCH << DB_CNTRL_OFF) == db_cntrl)

					debounce_enable = "debouncing filter (low) enabled|";

				else

					debounce_enable = "debouncing filter (high) enabled|";



				snprintf(debounce_value, sizeof(debounce_value),

					 "debouncing timeout is %u (us)|", time * unit);

			} else {

				debounce_enable = "debouncing filter disabled|";

				snprintf(debounce_value, sizeof(debounce_value), " ");

			}



			seq_printf(s, "%s %s %s %s %s %s\n"

				" %s %s %s %s %s %s %s 0x%x\n",

				" %s %s %s %s %s %s %s %s %s 0x%x\n",

				level_trig, active_level, interrupt_enable,

				interrupt_mask, wake_cntrl0, wake_cntrl1,

				wake_cntrl2, pin_sts, pull_up_sel,

				pull_up_enable, pull_down_enable,

				output_value, output_enable, pin_reg);

				output_value, output_enable,

				debounce_enable, debounce_value, pin_reg);

		}

	}

}