FreeCalypso > hg > freecalypso-tools
changeset 865:57f7db8c4f45
lunadrv: add reset-suspend command
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Thu, 24 Mar 2022 06:39:13 +0000 |
| parents | 82d4a7438639 |
| children | 1976ce568ccd |
| files | target-utils/lunadrv/cmdtab.c target-utils/lunadrv/sleep.c |
| diffstat | 2 files changed, 22 insertions(+), 0 deletions(-) [+] |
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--- a/target-utils/lunadrv/cmdtab.c Thu Mar 24 04:00:37 2022 +0000 +++ b/target-utils/lunadrv/cmdtab.c Thu Mar 24 06:39:13 2022 +0000 @@ -12,6 +12,7 @@ extern void cmd_r32(); extern void cmd_rd(); extern void cmd_rect(); +extern void cmd_reset_suspend(); extern void cmd_resume(); extern void cmd_suspend(); extern void cmd_w8(); @@ -46,6 +47,7 @@ {"r32", cmd_r32}, {"rd", cmd_rd}, {"rect", cmd_rect}, + {"reset-suspend", cmd_reset_suspend}, {"resume", cmd_resume}, {"suspend", cmd_suspend}, {"w8", cmd_w8},
--- a/target-utils/lunadrv/sleep.c Thu Mar 24 04:00:37 2022 +0000 +++ b/target-utils/lunadrv/sleep.c Thu Mar 24 06:39:13 2022 +0000 @@ -25,3 +25,23 @@ wait_ARM_cycles(DELAY_1MS * 50); LCD_REG_WR(0x0007, 0x1017); /* display on */ } + +/* + * If we wish to run sans-UI firmware on an LCD-equipped board, + * we would like to put the ILI9225G controller into its lowest + * power mode, without doing anything else to it. The following + * reset-suspend command prototypes this functionality. + */ + +void +cmd_reset_suspend() +{ + /* reset pulse */ + CNTL_RST_REG |= EXT_RESET; + wait_ARM_cycles(DELAY_1MS * 10); + CNTL_RST_REG &= ~EXT_RESET; + /* datasheet says it needs 50 ms */ + wait_ARM_cycles(DELAY_1MS * 50); + /* and straight into suspend mode */ + LCD_REG_WR(0x0010, 1); +}