diff options
| -rw-r--r-- | drivers/input/touchscreen/ti_tscadc.c | 25 | ||||
| -rw-r--r-- | include/linux/input/ti_tscadc.h | 6 |
2 files changed, 19 insertions, 12 deletions
diff --git a/drivers/input/touchscreen/ti_tscadc.c b/drivers/input/touchscreen/ti_tscadc.c index d198cab61a69..c1bd8e5c132c 100644 --- a/drivers/input/touchscreen/ti_tscadc.c +++ b/drivers/input/touchscreen/ti_tscadc.c @@ -41,10 +41,6 @@ #define REG_CHARGEDELAY 0x060 #define REG_STEPCONFIG(n) (0x64 + ((n - 1) * 8)) #define REG_STEPDELAY(n) (0x68 + ((n - 1) * 8)) -#define REG_STEPCONFIG13 0x0C4 -#define REG_STEPDELAY13 0x0C8 -#define REG_STEPCONFIG14 0x0CC -#define REG_STEPDELAY14 0x0D0 #define REG_FIFO0CNT 0xE4 #define REG_FIFO1THR 0xF4 #define REG_FIFO0 0x100 @@ -134,6 +130,7 @@ struct tscadc { unsigned int wires; unsigned int x_plate_resistance; bool pen_down; + int steps_to_configure; }; static unsigned int tscadc_readl(struct tscadc *ts, unsigned int reg) @@ -150,9 +147,10 @@ static void tscadc_writel(struct tscadc *tsc, unsigned int reg, static void tscadc_step_config(struct tscadc *ts_dev) { unsigned int config; - int i; + int i, total_steps; /* Configure the Step registers */ + total_steps = 2 * ts_dev->steps_to_configure; config = STEPCONFIG_MODE_HWSYNC | STEPCONFIG_AVG_16 | STEPCONFIG_XPP; @@ -170,7 +168,7 @@ static void tscadc_step_config(struct tscadc *ts_dev) break; } - for (i = 1; i < 7; i++) { + for (i = 1; i <= ts_dev->steps_to_configure; i++) { tscadc_writel(ts_dev, REG_STEPCONFIG(i), config); tscadc_writel(ts_dev, REG_STEPDELAY(i), STEPCONFIG_OPENDLY); } @@ -192,7 +190,7 @@ static void tscadc_step_config(struct tscadc *ts_dev) break; } - for (i = 7; i < 13; i++) { + for (i = (ts_dev->steps_to_configure + 1); i <= total_steps; i++) { tscadc_writel(ts_dev, REG_STEPCONFIG(i), config); tscadc_writel(ts_dev, REG_STEPDELAY(i), STEPCONFIG_OPENDLY); } @@ -211,12 +209,14 @@ static void tscadc_step_config(struct tscadc *ts_dev) config = STEPCONFIG_MODE_HWSYNC | STEPCONFIG_AVG_16 | STEPCONFIG_YPP | STEPCONFIG_XNN | STEPCONFIG_INM_ADCREFM; - tscadc_writel(ts_dev, REG_STEPCONFIG13, config); - tscadc_writel(ts_dev, REG_STEPDELAY13, STEPCONFIG_OPENDLY); + tscadc_writel(ts_dev, REG_STEPCONFIG(total_steps + 1), config); + tscadc_writel(ts_dev, REG_STEPDELAY(total_steps + 1), + STEPCONFIG_OPENDLY); config |= STEPCONFIG_INP_AN3 | STEPCONFIG_FIFO1; - tscadc_writel(ts_dev, REG_STEPCONFIG14, config); - tscadc_writel(ts_dev, REG_STEPDELAY14, STEPCONFIG_OPENDLY); + tscadc_writel(ts_dev, REG_STEPCONFIG(total_steps + 2), config); + tscadc_writel(ts_dev, REG_STEPDELAY(total_steps + 2), + STEPCONFIG_OPENDLY); tscadc_writel(ts_dev, REG_SE, STPENB_STEPENB); } @@ -379,6 +379,7 @@ static int __devinit tscadc_probe(struct platform_device *pdev) ts_dev->irq = irq; ts_dev->wires = pdata->wires; ts_dev->x_plate_resistance = pdata->x_plate_resistance; + ts_dev->steps_to_configure = pdata->steps_to_configure; res = request_mem_region(res->start, resource_size(res), pdev->name); if (!res) { @@ -447,7 +448,7 @@ static int __devinit tscadc_probe(struct platform_device *pdev) tscadc_idle_config(ts_dev); tscadc_writel(ts_dev, REG_IRQENABLE, IRQENB_FIFO1THRES); tscadc_step_config(ts_dev); - tscadc_writel(ts_dev, REG_FIFO1THR, 6); + tscadc_writel(ts_dev, REG_FIFO1THR, ts_dev->steps_to_configure); ctrl |= CNTRLREG_TSCSSENB; tscadc_writel(ts_dev, REG_CTRL, ctrl); diff --git a/include/linux/input/ti_tscadc.h b/include/linux/input/ti_tscadc.h index b10a527a92a4..ad442a3eb68b 100644 --- a/include/linux/input/ti_tscadc.h +++ b/include/linux/input/ti_tscadc.h @@ -7,11 +7,17 @@ * i.e. 4/5/8 wire touchscreen support * on the platform. * @x_plate_resistance: X plate resistance. + * @steps_to_configure: The sequencer supports a total of + * 16 programmable steps. + * A step configured to read a single + * co-ordinate value, can be applied + * more number of times for better results. */ struct tsc_data { int wires; int x_plate_resistance; + int steps_to_configure; }; #endif |