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8d05cbef73
AM62P SoC has multiple speed grades. Add function to delete non-relevant CPU frequency nodes, based on the information retrieved from hardware registers. Fastest grade's maximum frequency also depends on PMIC voltage, hence to simplify implementation use the smaller value. Signed-off-by: Aparna Patra <a-patra@ti.com> Reviewed-by: Bryan Brattlof <bb@ti.com>
100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2024 Texas Instruments Incorporated - https://www.ti.com/
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*/
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#include <asm/hardware.h>
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#include "../common_fdt.h"
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#include <fdt_support.h>
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static void fdt_fixup_cores_wdt_nodes_am62p(void *blob, int core_nr)
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{
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char node_path[32];
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if (core_nr < 1)
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return;
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for (; core_nr < 4; core_nr++) {
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snprintf(node_path, sizeof(node_path), "/cpus/cpu@%d", core_nr);
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fdt_del_node_path(blob, node_path);
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snprintf(node_path, sizeof(node_path), "/cpus/cpu-map/cluster0/core%d", core_nr);
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fdt_del_node_path(blob, node_path);
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snprintf(node_path, sizeof(node_path), "/bus@f0000/watchdog@e0%d0000", core_nr);
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fdt_del_node_path(blob, node_path);
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}
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}
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static void fdt_fixup_video_codec_nodes_am62p(void *blob, bool has_video_codec)
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{
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if (!has_video_codec)
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fdt_del_node_path(blob, "/bus@f0000/video-codec@30210000");
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}
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static void fdt_fixup_canfd_nodes_am62p(void *blob, bool has_canfd)
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{
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if (!has_canfd) {
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fdt_del_node_path(blob, "/bus@f0000/can@20701000");
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fdt_del_node_path(blob, "/bus@f0000/can@20711000");
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}
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}
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static int fdt_fixup_trips_node(void *blob, int zoneoffset, int maxc)
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{
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int node, trip;
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node = fdt_subnode_offset(blob, zoneoffset, "trips");
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if (node < 0)
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return -1;
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fdt_for_each_subnode(trip, blob, node) {
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const char *type = fdt_getprop(blob, trip, "type", NULL);
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if (!type || (strncmp(type, "critical", 8) != 0))
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continue;
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if (fdt_setprop_u32(blob, trip, "temperature", 1000 * maxc) < 0)
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return -1;
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}
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return 0;
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}
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static void fdt_fixup_thermal_zone_nodes_am62p(void *blob, int maxc)
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{
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int node, zone;
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node = fdt_path_offset(blob, "/thermal-zones");
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if (node < 0)
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return;
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fdt_for_each_subnode(zone, blob, node) {
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if (fdt_fixup_trips_node(blob, zone, maxc) < 0)
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printf("Failed to set temperature in %s critical trips\n",
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fdt_get_name(blob, zone, NULL));
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}
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}
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static void fdt_fixup_cpu_freq_nodes_am62p(void *blob, int max_freq)
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{
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if (max_freq >= 1250000000)
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return;
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if (max_freq <= 1000000000) {
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fdt_del_node_path(blob, "/opp-table/opp-1250000000");
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fdt_del_node_path(blob, "/opp-table/opp-1400000000");
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}
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}
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int ft_system_setup(void *blob, struct bd_info *bd)
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{
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fdt_fixup_cores_wdt_nodes_am62p(blob, k3_get_core_nr());
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fdt_fixup_video_codec_nodes_am62p(blob, k3_has_video_codec());
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fdt_fixup_canfd_nodes_am62p(blob, k3_has_canfd());
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fdt_fixup_thermal_zone_nodes_am62p(blob, k3_get_max_temp());
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fdt_fixup_cpu_freq_nodes_am62p(blob, k3_get_a53_max_frequency());
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fdt_fixup_reserved(blob, "tfa", CONFIG_K3_ATF_LOAD_ADDR, 0x80000);
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fdt_fixup_reserved(blob, "optee", CONFIG_K3_OPTEE_LOAD_ADDR, 0x1800000);
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return 0;
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}
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