2 * OMAP2plus display device setup / initialization.
4 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
5 * Senthilvadivu Guruswamy
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
13 * kind, whether express or implied; without even the implied warranty
14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
18 #include <linux/kernel.h>
19 #include <linux/init.h>
20 #include <linux/platform_device.h>
22 #include <linux/clk.h>
23 #include <linux/err.h>
25 #include <plat/display.h>
26 #include <plat/omap_hwmod.h>
27 #include <plat/omap_device.h>
29 static struct platform_device omap_display_device = {
33 .platform_data = NULL,
37 static struct omap_device_pm_latency omap_dss_latency[] = {
39 .deactivate_func = omap_device_idle_hwmods,
40 .activate_func = omap_device_enable_hwmods,
41 .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
45 /* oh_core is used for getting opt-clocks */
46 static struct omap_hwmod *oh_core;
48 static bool opt_clock_available(const char *clk_role)
52 for (i = 0; i < oh_core->opt_clks_cnt; i++) {
53 if (!strcmp(oh_core->opt_clks[i].role, clk_role))
59 int __init omap_display_init(struct omap_dss_board_info *board_data)
62 struct omap_hwmod *oh;
63 struct omap_device *od;
65 struct omap_display_platform_data pdata;
68 * omap: valid DSS hwmod names
69 * omap2,3,4: dss_core, dss_dispc, dss_rfbi, dss_venc
71 * omap4: dss_dsi2, dss_hdmi
73 char *oh_name[] = { "dss_core", "dss_dispc", "dss_rfbi", "dss_venc",
74 "dss_dsi1", "dss_dsi2", "dss_hdmi" };
75 char *dev_name[] = { "omapdss_dss", "omapdss_dispc", "omapdss_rfbi",
76 "omapdss_venc", "omapdss_dsi1", "omapdss_dsi2",
80 memset(&pdata, 0, sizeof(pdata));
82 if (cpu_is_omap24xx())
83 oh_count = ARRAY_SIZE(oh_name) - 3;
84 /* last 3 hwmod dev in oh_name are not available for omap2 */
85 else if (cpu_is_omap44xx())
86 oh_count = ARRAY_SIZE(oh_name);
88 oh_count = ARRAY_SIZE(oh_name) - 2;
89 /* last 2 hwmod dev in oh_name are not available for omap3 */
91 /* opt_clks are always associated with dss hwmod */
92 oh_core = omap_hwmod_lookup("dss_core");
94 pr_err("Could not look up dss_core.\n");
98 pdata.board_data = board_data;
99 pdata.board_data->get_last_off_on_transaction_id = NULL;
100 pdata.opt_clock_available = opt_clock_available;
102 for (i = 0; i < oh_count; i++) {
103 oh = omap_hwmod_lookup(oh_name[i]);
105 pr_err("Could not look up %s\n", oh_name[i]);
109 od = omap_device_build(dev_name[i], -1, oh, &pdata,
110 sizeof(struct omap_display_platform_data),
112 ARRAY_SIZE(omap_dss_latency), 0);
114 if (WARN((IS_ERR(od)), "Could not build omap_device for %s\n",
118 omap_display_device.dev.platform_data = board_data;
120 r = platform_device_register(&omap_display_device);
122 printk(KERN_ERR "Unable to register OMAP-Display device\n");