mb/google/nissa/var/glassway: Tune I2C timings for 400 kHz
Update touchpad and touchscreen I2C timing.
- Data hold time: 300ns - 900ns
BUG=b:328724191
BRANCH=firmware-nissa-15217.B
TEST=Check wave form and met the spec.
I2C1 (touchscreen) Hold time from 83.58ns to 413.87ns
I2C5 (touchpad) Hold time from 95.93ns to 425.27ns
Change-Id: I65fb1298f9e96ab0b63aba436f6a319f21b38925
Signed-off-by: Frank Chu <frank_chu@pegatron.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81136
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Shawn Ku <shawnku@google.com>
This commit is contained in:
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1 changed files with 2 additions and 2 deletions
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@ -129,7 +129,7 @@ chip soc/intel/alderlake
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.speed = I2C_SPEED_FAST,
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.scl_lcnt = 157,
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.scl_hcnt = 79,
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.sda_hold = 7,
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.sda_hold = 40,
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}
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},
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.i2c[2] = {
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@ -156,7 +156,7 @@ chip soc/intel/alderlake
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.speed = I2C_SPEED_FAST,
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.scl_lcnt = 158,
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.scl_hcnt = 79,
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.sda_hold = 7,
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.sda_hold = 40,
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}
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},
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}"
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