tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
iio: sx9360: Add pre-charge resistor setting
Add ability to set the precharge internal resistance from the device
tree.
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20220429220144.1476049-11-gwendal@chromium.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
authored by
Gwendal Grignou
and committed by
Jonathan Cameron
bc76ea59
4f3b42b8
+14
-1
+14
-1
drivers/iio/proximity/sx9360.c
+14
-1
drivers/iio/proximity/sx9360.c
···
51
51
#define SX9360_REG_GNRL_REG_2_FREQ(_r) (SX9360_FOSC_HZ / ((_r) * 8192))
52
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53
#define SX9360_REG_AFE_CTRL1 0x21
54
+
#define SX9360_REG_AFE_CTRL1_RESFILTIN_MASK GENMASK(3, 0)
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+
#define SX9360_REG_AFE_CTRL1_RESFILTIN_0OHMS 0
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#define SX9360_REG_AFE_PARAM0_PHR 0x22
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#define SX9360_REG_AFE_PARAM1_PHR 0x23
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#define SX9360_REG_AFE_PARAM0_PHM 0x24
···
673
671
{ SX9360_REG_GNRL_CTRL1, 0x00 },
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672
{ SX9360_REG_GNRL_CTRL2, SX9360_REG_GNRL_CTRL2_PERIOD_102MS },
675
673
676
-
{ SX9360_REG_AFE_CTRL1, 0x00 },
674
+
{ SX9360_REG_AFE_CTRL1, SX9360_REG_AFE_CTRL1_RESFILTIN_0OHMS },
677
675
{ SX9360_REG_AFE_PARAM0_PHR, SX9360_REG_AFE_PARAM0_RSVD |
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676
SX9360_REG_AFE_PARAM0_RESOLUTION_128 },
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677
{ SX9360_REG_AFE_PARAM1_PHR, SX9360_REG_AFE_PARAM1_AGAIN_PHM_6PF |
···
724
722
725
723
memcpy(reg_def, &sx9360_default_regs[idx], sizeof(*reg_def));
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724
switch (reg_def->reg) {
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+
case SX9360_REG_AFE_CTRL1:
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+
ret = device_property_read_u32(dev,
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+
"semtech,input-precharge-resistor-ohms",
728
+
&raw);
729
+
if (ret)
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+
break;
731
+
732
+
reg_def->def &= ~SX9360_REG_AFE_CTRL1_RESFILTIN_MASK;
733
+
reg_def->def |= FIELD_PREP(SX9360_REG_AFE_CTRL1_RESFILTIN_MASK,
734
+
raw / 2000);
735
+
break;
727
736
case SX9360_REG_AFE_PARAM0_PHR:
728
737
case SX9360_REG_AFE_PARAM0_PHM:
729
738
ret = device_property_read_u32(dev, "semtech,resolution", &raw);