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hwmon: epm_adc: Scale single measurement result

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EPM driver can scale the result returned to the user
instead of returning raw ADC code that is obtained
through the PSOC.

The range of the code is from 0-0x7fff with the
corresponding voltage range from 0 to 2.048V. The
voltage units are in mV. The current is computed
using the corresponding channel's rsense value
with the units in mA.

Change-Id: I6fc4b264fa170e412800f4ef77b4c3dacb90186c
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
This commit is contained in:
Siddartha Mohanadoss 2012-12-06 14:17:30 -08:00 committed by Stephen Boyd
parent d4afc55092
commit 7efed8e6f4
1 changed files with 4 additions and 0 deletions
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4
drivers/hwmon/epm_adc.c
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@ -1324,6 +1324,10 @@ static long epm_adc_ioctl(struct file *file, unsigned int cmd,
return -EINVAL;
}
psoc_get_data.reading_value = epm_psoc_scale_result(
psoc_get_data.reading_value,
psoc_get_data.chan_num);
if (copy_to_user((void __user *)arg, &psoc_get_data,
sizeof(struct epm_psoc_get_data)))
return -EFAULT;