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[u-boot] / common / lcd_simplefb.c
1 /*
2  * Simplefb device tree support
3  *
4  * (C) Copyright 2015
5  * Stephen Warren <swarren@wwwdotorg.org>
6  *
7  * SPDX-License-Identifier:     GPL-2.0+
8  */
9
10 #include <common.h>
11 #include <lcd.h>
12 #include <fdt_support.h>
13 #include <libfdt.h>
14
15 DECLARE_GLOBAL_DATA_PTR;
16
17 static int lcd_dt_simplefb_configure_node(void *blob, int off)
18 {
19         int vl_col = lcd_get_pixel_width();
20         int vl_row = lcd_get_pixel_height();
21 #if LCD_BPP == LCD_COLOR16
22         return fdt_setup_simplefb_node(blob, off, gd->fb_base, vl_col, vl_row,
23                                        vl_col * 2, "r5g6b5");
24 #elif LCD_BPP == LCD_COLOR32
25         return fdt_setup_simplefb_node(blob, off, gd->fb_base, vl_col, vl_row,
26                                        vl_col * 4, "a8r8g8b8");
27 #else
28         return -1;
29 #endif
30 }
31
32 int lcd_dt_simplefb_add_node(void *blob)
33 {
34         static const char compat[] = "simple-framebuffer";
35         static const char disabled[] = "disabled";
36         int off, ret;
37
38         off = fdt_add_subnode(blob, 0, "framebuffer");
39         if (off < 0)
40                 return -1;
41
42         ret = fdt_setprop(blob, off, "status", disabled, sizeof(disabled));
43         if (ret < 0)
44                 return -1;
45
46         ret = fdt_setprop(blob, off, "compatible", compat, sizeof(compat));
47         if (ret < 0)
48                 return -1;
49
50         return lcd_dt_simplefb_configure_node(blob, off);
51 }
52
53 int lcd_dt_simplefb_enable_existing_node(void *blob)
54 {
55         int off;
56
57         off = fdt_node_offset_by_compatible(blob, -1, "simple-framebuffer");
58         if (off < 0)
59                 return -1;
60
61         return lcd_dt_simplefb_configure_node(blob, off);
62 }