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 #if LCD_BPP == LCD_COLOR16 20 int vl_col = lcd_get_pixel_width(); 21 int vl_row = lcd_get_pixel_height(); 22 return fdt_setup_simplefb_node(blob, off, gd->fb_base, vl_col, vl_row, 23 vl_col * 2, "r5g6b5"); 24 #else 25 return -1; 26 #endif 27 } 28 29 int lcd_dt_simplefb_add_node(void *blob) 30 { 31 static const char compat[] = "simple-framebuffer"; 32 static const char disabled[] = "disabled"; 33 int off, ret; 34 35 off = fdt_add_subnode(blob, 0, "framebuffer"); 36 if (off < 0) 37 return -1; 38 39 ret = fdt_setprop(blob, off, "status", disabled, sizeof(disabled)); 40 if (ret < 0) 41 return -1; 42 43 ret = fdt_setprop(blob, off, "compatible", compat, sizeof(compat)); 44 if (ret < 0) 45 return -1; 46 47 return lcd_dt_simplefb_configure_node(blob, off); 48 } 49 50 int lcd_dt_simplefb_enable_existing_node(void *blob) 51 { 52 int off; 53 54 off = fdt_node_offset_by_compatible(blob, -1, "simple-framebuffer"); 55 if (off < 0) 56 return -1; 57 58 return lcd_dt_simplefb_configure_node(blob, off); 59 } 60