diff options
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/touchscreen/sun4i-ts.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/input/touchscreen/sun4i-ts.c b/drivers/input/touchscreen/sun4i-ts.c index 178d2efb8353..c0116994067d 100644 --- a/drivers/input/touchscreen/sun4i-ts.c +++ b/drivers/input/touchscreen/sun4i-ts.c @@ -30,6 +30,10 @@ * These kinds of heuristics are just asking for trouble (and don't belong * in the kernel). So this driver offers straight forward, reliable single * touch functionality only. + * + * s.a. A20 User Manual "1.15 TP" (Documentation/arm/sunxi/README) + * (looks like the description in the A20 User Manual v1.3 is better + * than the one in the A10 User Manual v.1.5) */ #include <linux/err.h> @@ -246,6 +250,8 @@ static int sun4i_ts_probe(struct platform_device *pdev) int error; u32 reg; bool ts_attached; + u32 tp_sensitive_adjust = 15; + u32 filter_type = 1; ts = devm_kzalloc(dev, sizeof(struct sun4i_ts_data), GFP_KERNEL); if (!ts) @@ -322,14 +328,20 @@ static int sun4i_ts_probe(struct platform_device *pdev) ts->base + TP_CTRL0); /* - * sensitive_adjust = 15 : max, which is not all that sensitive, + * tp_sensitive_adjust is an optional property * tp_mode = 0 : only x and y coordinates, as we don't use dual touch */ - writel(TP_SENSITIVE_ADJUST(15) | TP_MODE_SELECT(0), + of_property_read_u32(np, "allwinner,tp-sensitive-adjust", + &tp_sensitive_adjust); + writel(TP_SENSITIVE_ADJUST(tp_sensitive_adjust) | TP_MODE_SELECT(0), ts->base + TP_CTRL2); - /* Enable median filter, type 1 : 5/3 */ - writel(FILTER_EN(1) | FILTER_TYPE(1), ts->base + TP_CTRL3); + /* + * Enable median and averaging filter, optional property for + * filter type. + */ + of_property_read_u32(np, "allwinner,filter-type", &filter_type); + writel(FILTER_EN(1) | FILTER_TYPE(filter_type), ts->base + TP_CTRL3); /* Enable temperature measurement, period 1953 (2 seconds) */ writel(TEMP_ENABLE(1) | TEMP_PERIOD(1953), ts->base + TP_TPR); |