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Input: ucb1400 - make delays configurable

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This patch adds module parameters for several timing values used
in the driver. These values can vary based on the hardware design
and how much capacitive filtering there is on the touch panel inputs,
and the resistance of the panel.

Signed-off-by: Cliff Brake <cbrake@bec-systems.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Cliff Brake 2007-04-12 01:35:43 -04:00 committed by Dmitry Torokhov
parent 293e6392d7
commit b5b16c5296
1 changed files with 14 additions and 3 deletions
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17
drivers/input/touchscreen/ucb1400_ts.c
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@ -97,6 +97,8 @@ struct ucb1400 {
};
static int adcsync;
static int ts_delay = 55; /* us */
static int ts_delay_pressure; /* us */
static inline u16 ucb1400_reg_read(struct ucb1400 *ucb, u16 reg)
{
@ -159,6 +161,7 @@ static inline unsigned int ucb1400_ts_read_pressure(struct ucb1400 *ucb)
UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW |
UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND |
UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
udelay(ts_delay_pressure);
return ucb1400_adc_read(ucb, UCB_ADC_INP_TSPY);
}
@ -180,7 +183,7 @@ static inline unsigned int ucb1400_ts_read_xpos(struct ucb1400 *ucb)
UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW |
UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA);
udelay(55);
udelay(ts_delay);
return ucb1400_adc_read(ucb, UCB_ADC_INP_TSPY);
}
@ -203,7 +206,7 @@ static inline unsigned int ucb1400_ts_read_ypos(struct ucb1400 *ucb)
UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW |
UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA);
udelay(55);
udelay(ts_delay);
return ucb1400_adc_read(ucb, UCB_ADC_INP_TSPX);
}
@ -571,7 +574,15 @@ static void __exit ucb1400_ts_exit(void)
driver_unregister(&ucb1400_ts_driver);
}
module_param(adcsync, int, 0444);
module_param(adcsync, bool, 0444);
MODULE_PARM_DESC(adcsync, "Synchronize touch readings with ADCSYNC pin.");
module_param(ts_delay, int, 0444);
MODULE_PARM_DESC(ts_delay, "Delay between panel setup and position read. Default = 55us.");
module_param(ts_delay_pressure, int, 0444);
MODULE_PARM_DESC(ts_delay_pressure,
"delay between panel setup and pressure read. Default = 0us.");
module_init(ucb1400_ts_init);
module_exit(ucb1400_ts_exit);