diff options
| author | Dario Binacchi <dario.binacchi@amarulasolutions.com> | 2025-09-23 16:37:37 +0200 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2025-09-24 14:21:13 -0700 |
| commit | 5042e57d39719e531f3e122f12bf320869e84782 (patch) | |
| tree | ab38ddde0bb4ed1e8f5a18e606f699f5c5d1349b /drivers | |
| parent | 3fccd1f9552dd073915b0a69d43cc03c582ce79b (diff) | |
Input: imx6ul_tsc - set glitch threshold by DTS property
Set the glitch threshold by DTS property and keep the existing default
behavior if the 'debounce-delay-us' is not present.
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20250923143746.2857292-7-dario.binacchi@amarulasolutions.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/input/touchscreen/imx6ul_tsc.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/drivers/input/touchscreen/imx6ul_tsc.c b/drivers/input/touchscreen/imx6ul_tsc.c index e2c59cc7c82c..85f697de2b7e 100644 --- a/drivers/input/touchscreen/imx6ul_tsc.c +++ b/drivers/input/touchscreen/imx6ul_tsc.c @@ -79,7 +79,7 @@ #define MEASURE_SIG_EN BIT(0) #define VALID_SIG_EN BIT(8) #define DE_GLITCH_MASK GENMASK(30, 29) -#define DE_GLITCH_2 0x02 +#define DE_GLITCH_DEF 0x02 #define START_SENSE BIT(12) #define TSC_DISABLE BIT(16) #define DETECT_MODE 0x2 @@ -98,6 +98,7 @@ struct imx6ul_tsc { u32 pre_charge_time; bool average_enable; u32 average_select; + u32 de_glitch; struct completion completion; }; @@ -205,7 +206,7 @@ static void imx6ul_tsc_set(struct imx6ul_tsc *tsc) basic_setting |= AUTO_MEASURE; writel(basic_setting, tsc->tsc_regs + REG_TSC_BASIC_SETTING); - debug_mode2 = FIELD_PREP(DE_GLITCH_MASK, DE_GLITCH_2); + debug_mode2 = FIELD_PREP(DE_GLITCH_MASK, tsc->de_glitch); writel(debug_mode2, tsc->tsc_regs + REG_TSC_DEBUG_MODE2); writel(tsc->pre_charge_time, tsc->tsc_regs + REG_TSC_PRE_CHARGE_TIME); @@ -391,6 +392,7 @@ static int imx6ul_tsc_probe(struct platform_device *pdev) int tsc_irq; int adc_irq; u32 average_samples; + u32 de_glitch; tsc = devm_kzalloc(&pdev->dev, sizeof(*tsc), GFP_KERNEL); if (!tsc) @@ -513,6 +515,25 @@ static int imx6ul_tsc_probe(struct platform_device *pdev) return -EINVAL; } + err = of_property_read_u32(np, "debounce-delay-us", &de_glitch); + if (err) { + tsc->de_glitch = DE_GLITCH_DEF; + } else { + u64 cycles; + unsigned long rate = clk_get_rate(tsc->tsc_clk); + + cycles = DIV64_U64_ROUND_UP((u64)de_glitch * rate, USEC_PER_SEC); + + if (cycles <= 0x3ff) + tsc->de_glitch = 3; + else if (cycles <= 0x7ff) + tsc->de_glitch = 2; + else if (cycles <= 0xfff) + tsc->de_glitch = 1; + else + tsc->de_glitch = 0; + } + err = input_register_device(tsc->input); if (err) { dev_err(&pdev->dev, |