diff options
| author | Coiby Xu <coiby.xu@gmail.com> | 2020-11-06 07:19:11 +0800 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2020-11-10 14:58:14 +0100 |
| commit | 39cc1d3397053f340776c99e55b733a063fa2c69 (patch) | |
| tree | 61ebe53cd7b953dac3ba7d026026acf5f501956e /drivers/pinctrl/pinctrl-amd.c | |
| parent | 016e054d6926390a583a6422f3193e222be62eb9 (diff) | |
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: Coiby Xu <coiby.xu@gmail.com>
Link: https://lore.kernel.org/r/20201105231912.69527-4-coiby.xu@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-amd.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-amd.c | 43 |
1 files changed, 41 insertions, 2 deletions
diff --git a/drivers/pinctrl/pinctrl-amd.c b/drivers/pinctrl/pinctrl-amd.c index 9a760f5cd7ed..8aa2e876cb47 100644 --- a/drivers/pinctrl/pinctrl-amd.c +++ b/drivers/pinctrl/pinctrl-amd.c @@ -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); } } } |