drivers/i2c: sx9310: Replace register map with descriptive names

The current driver is using chip registers map to configure the SAR
sensor, which is opaque, especially when the datasheet is not published
widely.

Use more descriptive names, as defined in Linux kernel documentation at
https://www.kernel.org/doc/Documentation/devicetree/bindings/iio/proximity/semtech%2Csx9310.yaml

BUG=b:173341604
BRANCH=volteer
TEST=Dump all tables, check semtech property:
for i in $(find  /sys/firmware/acpi/tables/ -type f) ; do
 f=$(basename $i);  cat $i > /tmp/$f.dat ; iasl -d /tmp/$f.dat
done
In SSDT.dsl, we have:
Package (0x06)
 {
     Package (0x02)
     {
         "semtech,cs0-ground",
         Zero
     },
     Package (0x02)
     {
         "semtech,startup-sensor",
         Zero
     },
     Package (0x02)
     {
         "semtech,proxraw-strength",
         Zero
     },
     Package (0x02)
     {
         "semtech,avg-pos-strength",
         0x0200
     },
     Package (0x02)
     {
         "semtech,combined-sensors",
         Package (0x03)
         {
             Zero,
             One,
             0x02
         }
     },
     Package (0x02)
     {
         "semtech,resolution",
         "finest"
     }
 }

Change-Id: I8d1c81b56eaeef1dbb0f73c1d74c3a20e8b2fd7b
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50210
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

1 files changed, 18 insertions, 46 deletions

diff --git a/src/mainboard/google/poppy/variants/nocturne/devicetree.cb b/src/mainboard/google/poppy/variants/nocturne/devicetree.cb
index 899990de0b..39e241eba3 100644
--- a/src/mainboard/google/poppy/variants/nocturne/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/nocturne/devicetree.cb
@@ -311,30 +311,16 @@ chip soc/intel/skylake
 				register "irq" = "ACPI_IRQ_LEVEL_LOW(GPP_D9_IRQ)"
 				register "speed" = "I2C_SPEED_FAST"
 				register "uid" = "0"
-				register "reg_prox_ctrl0" = "0x10"
-				register "reg_prox_ctrl1" = "0x00"
-				register "reg_prox_ctrl2" = "0x84"
-				register "reg_prox_ctrl3" = "0x0e"
-				register "reg_prox_ctrl4" = "0x07"
-				register "reg_prox_ctrl5" = "0xc6"
-				register "reg_prox_ctrl6" = "0x20"
-				register "reg_prox_ctrl7" = "0x0d"
-				register "reg_prox_ctrl8" = "0x8d"
-				register "reg_prox_ctrl9" = "0x43"
-				register "reg_prox_ctrl10" = "0x1f"
-				register "reg_prox_ctrl11" = "0x00"
-				register "reg_prox_ctrl12" = "0x00"
-				register "reg_prox_ctrl13" = "0x00"
-				register "reg_prox_ctrl14" = "0x00"
-				register "reg_prox_ctrl15" = "0x00"
-				register "reg_prox_ctrl16" = "0x00"
-				register "reg_prox_ctrl17" = "0x00"
-				register "reg_prox_ctrl18" = "0x00"
-				register "reg_prox_ctrl19" = "0x00"
-				register "reg_sar_ctrl0" = "0x50"
-				register "reg_sar_ctrl1" = "0x8a"
-				register "reg_sar_ctrl2" = "0x3c"
 				device i2c 28 on end
+				register "cs0_ground" = "0x0"
+				register "combined_sensors_count" = "3"
+				register "combined_sensors[0]" = "0"
+				register "combined_sensors[1]" = "1"
+				register "combined_sensors[2]" = "2"
+				register "resolution" = "SX9310_FINEST"
+				register "avg_pos_strength" = "512"
+				register "startup_sensor" = "0"
+				register "proxraw_strength" = "0"
 			end
 		end # I2C #1
 		device pci 15.2 off end # I2C #2
@@ -352,30 +338,16 @@ chip soc/intel/skylake
 				register "irq" = "ACPI_IRQ_LEVEL_LOW(GPP_D10_IRQ)"
 				register "speed" = "I2C_SPEED_FAST"
 				register "uid" = "1"
-				register "reg_prox_ctrl0" = "0x10"
-				register "reg_prox_ctrl1" = "0x00"
-				register "reg_prox_ctrl2" = "0x84"
-				register "reg_prox_ctrl3" = "0x0e"
-				register "reg_prox_ctrl4" = "0x07"
-				register "reg_prox_ctrl5" = "0xc6"
-				register "reg_prox_ctrl6" = "0x20"
-				register "reg_prox_ctrl7" = "0x0d"
-				register "reg_prox_ctrl8" = "0x8d"
-				register "reg_prox_ctrl9" = "0x43"
-				register "reg_prox_ctrl10" = "0x1f"
-				register "reg_prox_ctrl11" = "0x00"
-				register "reg_prox_ctrl12" = "0x00"
-				register "reg_prox_ctrl13" = "0x00"
-				register "reg_prox_ctrl14" = "0x00"
-				register "reg_prox_ctrl15" = "0x00"
-				register "reg_prox_ctrl16" = "0x00"
-				register "reg_prox_ctrl17" = "0x00"
-				register "reg_prox_ctrl18" = "0x00"
-				register "reg_prox_ctrl19" = "0x00"
-				register "reg_sar_ctrl0" = "0x50"
-				register "reg_sar_ctrl1" = "0x8a"
-				register "reg_sar_ctrl2" = "0x3c"
 				device i2c 28 on end
+				register "cs0_ground" = "0x0"
+				register "combined_sensors_count" = "3"
+				register "combined_sensors[0]" = "0"
+				register "combined_sensors[1]" = "1"
+				register "combined_sensors[2]" = "2"
+				register "resolution" = "SX9310_FINEST"
+				register "avg_pos_strength" = "512"
+				register "startup_sensor" = "0"
+				register "proxraw_strength" = "0"
 			end
 		end # I2C #5
 		device pci 19.2 on