static ssize_t tsc2005_disable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct tsc2005 *ts = dev_get_drvdata(dev);
unsigned long res;
int i;
if (strict_strtoul(buf, 10, &res) < 0)
return -EINVAL;
i = res ? 1 : 0;
mutex_lock(&ts->mutex);
if (i == ts->disabled)
goto out;
ts->disabled = i;
if (i)
tsc2005_disable(ts);
else
tsc2005_enable(ts);
out:
mutex_unlock(&ts->mutex);
return count;
}
static int tsc2005_resume(struct spi_device *spi)
{
struct tsc2005 *ts = dev_get_drvdata(&spi->dev);
mutex_lock(&ts->mutex);
tsc2005_enable(ts);
mutex_unlock(&ts->mutex);
return 0;
}
static ssize_t tsc2005_ctrl_selftest_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
u16 temp_high_orig, temp_high_test, temp_high;
unsigned int result = 1;
struct tsc2005 *ts = dev_get_drvdata(dev);
if (!ts->set_reset) {
dev_warn(&ts->spi->dev,
"unable to selftest: reset not configured\n");
result = 0;
goto out;
}
mutex_lock(&ts->mutex);
tsc2005_disable(ts);
/* Test ctrl communications via temp high / low registers */
tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high_orig);
temp_high_test = (temp_high_orig - 1) & 0x0FFF;
tsc2005_write(ts, TSC2005_REG_TEMP_HIGH, temp_high_test);
tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high);
if (temp_high != temp_high_test) {
result = 0;
dev_warn(dev, "selftest failed: %d != %d\n",
temp_high, temp_high_test);
}
/* HW Reset */
ts->set_reset(0);
msleep(1); /* only 10us required */
ts->set_reset(1);
tsc2005_enable(ts);
/* Test that reset really happened */
tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high);
if (temp_high != temp_high_orig) {
result = 0;
dev_warn(dev, "selftest failed after reset: "
"%d != %d\n",
temp_high, temp_high_orig);
}
mutex_unlock(&ts->mutex);
out:
return sprintf(buf, "%u\n", result);
}
static ssize_t tsc2005_selftest_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct tsc2005 *ts = dev_get_drvdata(dev);
u16 temp_high;
u16 temp_high_orig;
u16 temp_high_test;
unsigned int result;
if (!ts->set_reset) {
dev_warn(&ts->spi->dev,
"unable to selftest: no reset function\n");
result = 0;
goto out;
}
mutex_lock(&ts->mutex);
/*
* Test TSC2005 communications via temp high register.
*/
tsc2005_disable(ts);
result = 1;
tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high_orig);
temp_high_test = (temp_high_orig - 1) & MAX_12BIT;
tsc2005_write(ts, TSC2005_REG_TEMP_HIGH, temp_high_test);
tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high);
if (temp_high != temp_high_test) {
dev_warn(dev, "selftest failed: %d != %d\n",
temp_high, temp_high_test);
result = 0;
}
/* hardware reset */
ts->set_reset(0);
msleep(1); /* only 10us required */
ts->set_reset(1);
tsc2005_enable(ts);
/* test that the reset really happened */
tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high);
if (temp_high != temp_high_orig) {
dev_warn(dev, "selftest failed after reset: %d != %d\n",
temp_high, temp_high_orig);
result = 0;
}
mutex_unlock(&ts->mutex);
out:
return sprintf(buf, "%u\n", result);
}