diff options
Diffstat (limited to 'drivers/video/fbdev/omap2/dss/omapdss-boot-init.c')
-rw-r--r-- | drivers/video/fbdev/omap2/dss/omapdss-boot-init.c | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/drivers/video/fbdev/omap2/dss/omapdss-boot-init.c b/drivers/video/fbdev/omap2/dss/omapdss-boot-init.c deleted file mode 100644 index 8b6f6d5fd..000000000 --- a/drivers/video/fbdev/omap2/dss/omapdss-boot-init.c +++ /dev/null @@ -1,227 +0,0 @@ -/* - * Copyright (C) 2014 Texas Instruments - * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> - * - * 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 in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program. If not, see <http://www.gnu.org/licenses/>. - */ - -/* - * As omapdss panel drivers are omapdss specific, but we want to define the - * DT-data in generic manner, we convert the compatible strings of the panel and - * encoder nodes from "panel-foo" to "omapdss,panel-foo". This way we can have - * both correct DT data and omapdss specific drivers. - * - * When we get generic panel drivers to the kernel, this file will be removed. - */ - -#include <linux/kernel.h> -#include <linux/of.h> -#include <linux/of_graph.h> -#include <linux/slab.h> -#include <linux/list.h> - -static struct list_head dss_conv_list __initdata; - -static const char prefix[] __initconst = "omapdss,"; - -struct dss_conv_node { - struct list_head list; - struct device_node *node; - bool root; -}; - -static int __init omapdss_count_strings(const struct property *prop) -{ - const char *p = prop->value; - int l = 0, total = 0; - int i; - - for (i = 0; total < prop->length; total += l, p += l, i++) - l = strlen(p) + 1; - - return i; -} - -static void __init omapdss_update_prop(struct device_node *node, char *compat, - int len) -{ - struct property *prop; - - prop = kzalloc(sizeof(*prop), GFP_KERNEL); - if (!prop) - return; - - prop->name = "compatible"; - prop->value = compat; - prop->length = len; - - of_update_property(node, prop); -} - -static void __init omapdss_prefix_strcpy(char *dst, int dst_len, - const char *src, int src_len) -{ - size_t total = 0; - - while (total < src_len) { - size_t l = strlen(src) + 1; - - strcpy(dst, prefix); - dst += strlen(prefix); - - strcpy(dst, src); - dst += l; - - src += l; - total += l; - } -} - -/* prepend compatible property strings with "omapdss," */ -static void __init omapdss_omapify_node(struct device_node *node) -{ - struct property *prop; - char *new_compat; - int num_strs; - int new_len; - - prop = of_find_property(node, "compatible", NULL); - - if (!prop || !prop->value) - return; - - if (strnlen(prop->value, prop->length) >= prop->length) - return; - - /* is it already prefixed? */ - if (strncmp(prefix, prop->value, strlen(prefix)) == 0) - return; - - num_strs = omapdss_count_strings(prop); - - new_len = prop->length + strlen(prefix) * num_strs; - new_compat = kmalloc(new_len, GFP_KERNEL); - - omapdss_prefix_strcpy(new_compat, new_len, prop->value, prop->length); - - omapdss_update_prop(node, new_compat, new_len); -} - -static void __init omapdss_add_to_list(struct device_node *node, bool root) -{ - struct dss_conv_node *n = kmalloc(sizeof(struct dss_conv_node), - GFP_KERNEL); - if (n) { - n->node = node; - n->root = root; - list_add(&n->list, &dss_conv_list); - } -} - -static bool __init omapdss_list_contains(const struct device_node *node) -{ - struct dss_conv_node *n; - - list_for_each_entry(n, &dss_conv_list, list) { - if (n->node == node) - return true; - } - - return false; -} - -static void __init omapdss_walk_device(struct device_node *node, bool root) -{ - struct device_node *n; - - omapdss_add_to_list(node, root); - - /* - * of_graph_get_remote_port_parent() prints an error if there is no - * port/ports node. To avoid that, check first that there's the node. - */ - n = of_get_child_by_name(node, "ports"); - if (!n) - n = of_get_child_by_name(node, "port"); - if (!n) - return; - - of_node_put(n); - - n = NULL; - while ((n = of_graph_get_next_endpoint(node, n)) != NULL) { - struct device_node *pn; - - pn = of_graph_get_remote_port_parent(n); - - if (!pn) - continue; - - if (!of_device_is_available(pn) || omapdss_list_contains(pn)) { - of_node_put(pn); - continue; - } - - omapdss_walk_device(pn, false); - } -} - -static const struct of_device_id omapdss_of_match[] __initconst = { - { .compatible = "ti,omap2-dss", }, - { .compatible = "ti,omap3-dss", }, - { .compatible = "ti,omap4-dss", }, - { .compatible = "ti,omap5-dss", }, - { .compatible = "ti,dra7-dss", }, - {}, -}; - -static int __init omapdss_boot_init(void) -{ - struct device_node *dss, *child; - - INIT_LIST_HEAD(&dss_conv_list); - - dss = of_find_matching_node(NULL, omapdss_of_match); - - if (dss == NULL || !of_device_is_available(dss)) - return 0; - - omapdss_walk_device(dss, true); - - for_each_available_child_of_node(dss, child) { - if (!of_find_property(child, "compatible", NULL)) { - of_node_put(child); - continue; - } - - omapdss_walk_device(child, true); - } - - while (!list_empty(&dss_conv_list)) { - struct dss_conv_node *n; - - n = list_first_entry(&dss_conv_list, struct dss_conv_node, - list); - - if (!n->root) - omapdss_omapify_node(n->node); - - list_del(&n->list); - of_node_put(n->node); - kfree(n); - } - - return 0; -} - -subsys_initcall(omapdss_boot_init); |