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Adjust SMBUS timing

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This commit is contained in:
Jeremy Soller
2019-11-12 10:59:01 -07:00
parent d07cbc33e5
commit 3e5f81b775
1 changed files with 13 additions and 7 deletions
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20
src/board/system76/galp3-c/smbus.c
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@ -1,15 +1,21 @@
#include <board/smbus.h>
void smbus_init(void) {
SMB4P7USL = 0x2F;
SMB4P0USL = 0x5A;
SMB300NS = 0x03;
SMB250NS = 0x30;
SMB25MS = 0x19;
SMB45P3USL = 0x5C;
// 9.2 MHz * 4.7 us = 43.24
SMB4P7USL = 43;
// 9.2 MHz * 4.0 us = 36.8
SMB4P0USL = 37;
// 9.2 MHz * 300 ns = 2.76
SMB300NS = 3;
// 9.2 MHz * 250 ns = 2.3
SMB250NS = 2;
// 1.024 KHz * 25 ms = 25.6
SMB25MS = 26;
// 9.2 MHz * 45.3 us = 416.76 (0x01A1)
SMB45P3USL = 0xA1;
SMB45P3USH = 0x01;
// Clock to 50 KHz
// Clock set to 50 Hz
SCLKTSA = 1;
// Enable host interface