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author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-25 15:38:14 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-25 15:38:14 -0400 |
commit | ce1d5b23a8d1e19866ab82bdec0dc41fde5273d8 (patch) | |
tree | 028c80655ee8853ebf607d435bc3d6ab223aef1f /drivers/input/touchscreen/ads7846.c | |
parent | ad5e1b0f5d913d2c8bddfba81049cc07228da1a6 (diff) | |
parent | 308f0a5898033691d050374a949bbfe173987a16 (diff) |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (40 commits)
Input: wacom - add support for Cintiq 20WSX
Input: ucb1400_ts - IRQ probe fix
Input: at32psif - update MODULE_AUTHOR with new email
Input: mac_hid - add lockdep annotation to emumousebtn
Input: i8042 - fix incorrect usage of strncpy and strncat
Input: bf54x-keys - add infrastructure for keypad wakeups
Input: add MODULE_ALIAS() to hotpluggable platform modules
Input: drivers/char/keyboard.c - use time_after
Input: fix ordering in joystick Makefile
Input: wm97xx-core - support use as a wakeup source
Input: wm97xx-core - use IRQF_SAMPLE_RANDOM
Input: wm97xx-core - only schedule interrupt handler if not already scheduled
Input: add Zhen Hua driver
Input: aiptek - add support for Genius G-PEN 560 tablet
Input: wacom - implement suspend and autosuspend
Input: xpad - set proper buffer length for outgoing requests
Input: omap-keypad - fix build warning
Input: gpio_keys - irq handling cleanup
Input: add PS/2 serio driver for AVR32 devices
Input: put ledstate in the keyboard notifier
...
Diffstat (limited to 'drivers/input/touchscreen/ads7846.c')
-rw-r--r-- | drivers/input/touchscreen/ads7846.c | 22 |
1 files changed, 10 insertions, 12 deletions
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c index 39573b91c8de..907a45fe9d40 100644 --- a/drivers/input/touchscreen/ads7846.c +++ b/drivers/input/touchscreen/ads7846.c | |||
@@ -80,6 +80,7 @@ struct ads7846 { | |||
80 | #endif | 80 | #endif |
81 | 81 | ||
82 | u16 model; | 82 | u16 model; |
83 | u16 vref_mv; | ||
83 | u16 vref_delay_usecs; | 84 | u16 vref_delay_usecs; |
84 | u16 x_plate_ohms; | 85 | u16 x_plate_ohms; |
85 | u16 pressure_max; | 86 | u16 pressure_max; |
@@ -177,9 +178,6 @@ struct ads7846 { | |||
177 | * The range is GND..vREF. The ads7843 and ads7835 must use external vREF; | 178 | * The range is GND..vREF. The ads7843 and ads7835 must use external vREF; |
178 | * ads7846 lets that pin be unconnected, to use internal vREF. | 179 | * ads7846 lets that pin be unconnected, to use internal vREF. |
179 | */ | 180 | */ |
180 | static unsigned vREF_mV; | ||
181 | module_param(vREF_mV, uint, 0); | ||
182 | MODULE_PARM_DESC(vREF_mV, "external vREF voltage, in milliVolts"); | ||
183 | 181 | ||
184 | struct ser_req { | 182 | struct ser_req { |
185 | u8 ref_on; | 183 | u8 ref_on; |
@@ -206,7 +204,6 @@ static int ads7846_read12_ser(struct device *dev, unsigned command) | |||
206 | struct ads7846 *ts = dev_get_drvdata(dev); | 204 | struct ads7846 *ts = dev_get_drvdata(dev); |
207 | struct ser_req *req = kzalloc(sizeof *req, GFP_KERNEL); | 205 | struct ser_req *req = kzalloc(sizeof *req, GFP_KERNEL); |
208 | int status; | 206 | int status; |
209 | int uninitialized_var(sample); | ||
210 | int use_internal; | 207 | int use_internal; |
211 | 208 | ||
212 | if (!req) | 209 | if (!req) |
@@ -263,13 +260,13 @@ static int ads7846_read12_ser(struct device *dev, unsigned command) | |||
263 | 260 | ||
264 | if (status == 0) { | 261 | if (status == 0) { |
265 | /* on-wire is a must-ignore bit, a BE12 value, then padding */ | 262 | /* on-wire is a must-ignore bit, a BE12 value, then padding */ |
266 | sample = be16_to_cpu(req->sample); | 263 | status = be16_to_cpu(req->sample); |
267 | sample = sample >> 3; | 264 | status = status >> 3; |
268 | sample &= 0x0fff; | 265 | status &= 0x0fff; |
269 | } | 266 | } |
270 | 267 | ||
271 | kfree(req); | 268 | kfree(req); |
272 | return status ? status : sample; | 269 | return status; |
273 | } | 270 | } |
274 | 271 | ||
275 | #if defined(CONFIG_HWMON) || defined(CONFIG_HWMON_MODULE) | 272 | #if defined(CONFIG_HWMON) || defined(CONFIG_HWMON_MODULE) |
@@ -310,7 +307,7 @@ static inline unsigned vaux_adjust(struct ads7846 *ts, ssize_t v) | |||
310 | unsigned retval = v; | 307 | unsigned retval = v; |
311 | 308 | ||
312 | /* external resistors may scale vAUX into 0..vREF */ | 309 | /* external resistors may scale vAUX into 0..vREF */ |
313 | retval *= vREF_mV; | 310 | retval *= ts->vref_mv; |
314 | retval = retval >> 12; | 311 | retval = retval >> 12; |
315 | return retval; | 312 | return retval; |
316 | } | 313 | } |
@@ -368,14 +365,14 @@ static int ads784x_hwmon_register(struct spi_device *spi, struct ads7846 *ts) | |||
368 | /* hwmon sensors need a reference voltage */ | 365 | /* hwmon sensors need a reference voltage */ |
369 | switch (ts->model) { | 366 | switch (ts->model) { |
370 | case 7846: | 367 | case 7846: |
371 | if (!vREF_mV) { | 368 | if (!ts->vref_mv) { |
372 | dev_dbg(&spi->dev, "assuming 2.5V internal vREF\n"); | 369 | dev_dbg(&spi->dev, "assuming 2.5V internal vREF\n"); |
373 | vREF_mV = 2500; | 370 | ts->vref_mv = 2500; |
374 | } | 371 | } |
375 | break; | 372 | break; |
376 | case 7845: | 373 | case 7845: |
377 | case 7843: | 374 | case 7843: |
378 | if (!vREF_mV) { | 375 | if (!ts->vref_mv) { |
379 | dev_warn(&spi->dev, | 376 | dev_warn(&spi->dev, |
380 | "external vREF for ADS%d not specified\n", | 377 | "external vREF for ADS%d not specified\n", |
381 | ts->model); | 378 | ts->model); |
@@ -868,6 +865,7 @@ static int __devinit ads7846_probe(struct spi_device *spi) | |||
868 | 865 | ||
869 | ts->spi = spi; | 866 | ts->spi = spi; |
870 | ts->input = input_dev; | 867 | ts->input = input_dev; |
868 | ts->vref_mv = pdata->vref_mv; | ||
871 | 869 | ||
872 | hrtimer_init(&ts->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); | 870 | hrtimer_init(&ts->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
873 | ts->timer.function = ads7846_timer; | 871 | ts->timer.function = ads7846_timer; |