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comparison target-utils/lunadrv/sleep.c @ 865:57f7db8c4f45

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lunadrv: add reset-suspend command
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 24 Mar 2022 06:39:13 +0000
parents a66095c7f35f
children
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864:82d4a7438639 865:57f7db8c4f45
23 { 23 {
24 LCD_REG_WR(0x0010, 0); /* out of suspend */ 24 LCD_REG_WR(0x0010, 0); /* out of suspend */
25 wait_ARM_cycles(DELAY_1MS * 50); 25 wait_ARM_cycles(DELAY_1MS * 50);
26 LCD_REG_WR(0x0007, 0x1017); /* display on */ 26 LCD_REG_WR(0x0007, 0x1017); /* display on */
27 } 27 }
28
29 /*
30 * If we wish to run sans-UI firmware on an LCD-equipped board,
31 * we would like to put the ILI9225G controller into its lowest
32 * power mode, without doing anything else to it. The following
33 * reset-suspend command prototypes this functionality.
34 */
35
36 void
37 cmd_reset_suspend()
38 {
39 /* reset pulse */
40 CNTL_RST_REG |= EXT_RESET;
41 wait_ARM_cycles(DELAY_1MS * 10);
42 CNTL_RST_REG &= ~EXT_RESET;
43 /* datasheet says it needs 50 ms */
44 wait_ARM_cycles(DELAY_1MS * 50);
45 /* and straight into suspend mode */
46 LCD_REG_WR(0x0010, 1);
47 }