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/*
* OMAP2plus display device setup / initialization.
*
* Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
* Senthilvadivu Guruswamy
* Sumit Semwal
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <plat/display.h>
#include <plat/omap_hwmod.h>
#include <plat/omap_device.h>
static struct platform_device omap_display_device = {
.name = "omapdss",
.id = -1,
.dev = {
.platform_data = NULL,
},
};
static struct omap_device_pm_latency omap_dss_latency[] = {
[0] = {
.deactivate_func = omap_device_idle_hwmods,
.activate_func = omap_device_enable_hwmods,
.flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
},
};
/* oh_core is used for getting opt-clocks */
static struct omap_hwmod *oh_core;
static bool opt_clock_available(const char *clk_role)
{
int i;
for (i = 0; i < oh_core->opt_clks_cnt; i++) {
if (!strcmp(oh_core->opt_clks[i].role, clk_role))
return true;
}
return false;
}
int __init omap_display_init(struct omap_dss_board_info *board_data)
{
int r = 0;
struct omap_hwmod *oh;
struct omap_device *od;
int i;
struct omap_display_platform_data pdata;
/*
* omap: valid DSS hwmod names
* omap2,3,4: dss_core, dss_dispc, dss_rfbi, dss_venc
* omap3,4: dss_dsi1
* omap4: dss_dsi2, dss_hdmi
*/
char *oh_name[] = { "dss_core", "dss_dispc", "dss_rfbi", "dss_venc",
"dss_dsi1", "dss_dsi2", "dss_hdmi" };
char *dev_name[] = { "omapdss_dss", "omapdss_dispc", "omapdss_rfbi",
"omapdss_venc", "omapdss_dsi1", "omapdss_dsi2",
"omapdss_hdmi" };
int oh_count;
memset(&pdata, 0, sizeof(pdata));
if (cpu_is_omap24xx())
oh_count = ARRAY_SIZE(oh_name) - 3;
/* last 3 hwmod dev in oh_name are not available for omap2 */
else if (cpu_is_omap44xx())
oh_count = ARRAY_SIZE(oh_name);
else
oh_count = ARRAY_SIZE(oh_name) - 2;
/* last 2 hwmod dev in oh_name are not available for omap3 */
/* opt_clks are always associated with dss hwmod */
oh_core = omap_hwmod_lookup("dss_core");
if (!oh_core) {
pr_err("Could not look up dss_core.\n");
return -ENODEV;
}
pdata.board_data = board_data;
pdata.board_data->get_last_off_on_transaction_id = NULL;
pdata.opt_clock_available = opt_clock_available;
for (i = 0; i < oh_count; i++) {
oh = omap_hwmod_lookup(oh_name[i]);
if (!oh) {
pr_err("Could not look up %s\n", oh_name[i]);
return -ENODEV;
}
od = omap_device_build(dev_name[i], -1, oh, &pdata,
sizeof(struct omap_display_platform_data),
omap_dss_latency,
ARRAY_SIZE(omap_dss_latency), 0);
if (WARN((IS_ERR(od)), "Could not build omap_device for %s\n",
oh_name[i]))
return -ENODEV;
}
omap_display_device.dev.platform_data = board_data;
r = platform_device_register(&omap_display_device);
if (r < 0)
printk(KERN_ERR "Unable to register OMAP-Display device\n");
return r;
}
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