fd4b34f607
Provide a function in pdata to allow dss submodules to check if a given clock is available on a platform as an optional clock. Signed-off-by: Senthilvadivu Guruswamy <svadivu@ti.com> (based on implementation from Senthil) Signed-off-by: Sumit Semwal <sumit.semwal@ti.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
/*
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* OMAP2plus display device setup / initialization.
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*
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* Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
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* Senthilvadivu Guruswamy
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* Sumit Semwal
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <plat/display.h>
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#include <plat/omap_hwmod.h>
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#include <plat/omap_device.h>
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static struct platform_device omap_display_device = {
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.name = "omapdss",
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.id = -1,
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.dev = {
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.platform_data = NULL,
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},
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};
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static struct omap_device_pm_latency omap_dss_latency[] = {
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[0] = {
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.deactivate_func = omap_device_idle_hwmods,
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.activate_func = omap_device_enable_hwmods,
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.flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
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},
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};
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/* oh_core is used for getting opt-clocks */
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static struct omap_hwmod *oh_core;
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static bool opt_clock_available(const char *clk_role)
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{
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int i;
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for (i = 0; i < oh_core->opt_clks_cnt; i++) {
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if (!strcmp(oh_core->opt_clks[i].role, clk_role))
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return true;
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}
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return false;
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}
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int __init omap_display_init(struct omap_dss_board_info *board_data)
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{
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int r = 0;
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struct omap_hwmod *oh;
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struct omap_device *od;
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int i;
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struct omap_display_platform_data pdata;
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/*
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* omap: valid DSS hwmod names
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* omap2,3,4: dss_core, dss_dispc, dss_rfbi, dss_venc
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* omap3,4: dss_dsi1
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* omap4: dss_dsi2, dss_hdmi
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*/
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char *oh_name[] = { "dss_core", "dss_dispc", "dss_rfbi", "dss_venc",
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"dss_dsi1", "dss_dsi2", "dss_hdmi" };
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char *dev_name[] = { "omapdss_dss", "omapdss_dispc", "omapdss_rfbi",
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"omapdss_venc", "omapdss_dsi1", "omapdss_dsi2",
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"omapdss_hdmi" };
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int oh_count;
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memset(&pdata, 0, sizeof(pdata));
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if (cpu_is_omap24xx())
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oh_count = ARRAY_SIZE(oh_name) - 3;
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/* last 3 hwmod dev in oh_name are not available for omap2 */
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else if (cpu_is_omap44xx())
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oh_count = ARRAY_SIZE(oh_name);
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else
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oh_count = ARRAY_SIZE(oh_name) - 2;
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/* last 2 hwmod dev in oh_name are not available for omap3 */
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/* opt_clks are always associated with dss hwmod */
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oh_core = omap_hwmod_lookup("dss_core");
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if (!oh_core) {
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pr_err("Could not look up dss_core.\n");
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return -ENODEV;
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}
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pdata.board_data = board_data;
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pdata.board_data->get_last_off_on_transaction_id = NULL;
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pdata.opt_clock_available = opt_clock_available;
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for (i = 0; i < oh_count; i++) {
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oh = omap_hwmod_lookup(oh_name[i]);
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if (!oh) {
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pr_err("Could not look up %s\n", oh_name[i]);
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return -ENODEV;
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}
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od = omap_device_build(dev_name[i], -1, oh, &pdata,
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sizeof(struct omap_display_platform_data),
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omap_dss_latency,
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ARRAY_SIZE(omap_dss_latency), 0);
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if (WARN((IS_ERR(od)), "Could not build omap_device for %s\n",
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oh_name[i]))
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return -ENODEV;
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}
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omap_display_device.dev.platform_data = board_data;
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r = platform_device_register(&omap_display_device);
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if (r < 0)
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printk(KERN_ERR "Unable to register OMAP-Display device\n");
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return r;
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}
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