Differential D25118 Diff 72618 sys/arm/ti/clock_common.c

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sys/arm/ti/clock_common.c

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				/*-
				* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
				*
				* Copyright (c) 2020 Oskar Holmlund <oskar.holmlund@ohdata.se>
				*
				* Redistribution and use in source and binary forms, with or without
				* modification, are permitted provided that the following conditions
				* are met:
				* 1. Redistributions of source code must retain the above copyright
				* notice, this list of conditions and the following disclaimer.
				* 2. Redistributions in binary form must reproduce the above copyright
				* notice, this list of conditions and the following disclaimer in the
				* documentation and/or other materials provided with the distribution.
				*
				* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
				* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
				* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
				* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
				* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
				* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
				* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
				* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
				* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
				* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
				* SUCH DAMAGE.
				*
				* $FreeBSD$
				*/

				#include <sys/cdefs.h>
				__FBSDID("$FreeBSD$");

				#include <sys/param.h>
				#include <sys/conf.h>
				#include <sys/bus.h>
				#include <sys/kernel.h>
				#include <sys/module.h>
				#include <sys/systm.h>
				#include <sys/libkern.h>
				#include <sys/types.h>
				#include <sys/malloc.h>

				#include <machine/bus.h>
				#include <dev/fdt/simplebus.h>

				#include <dev/extres/clk/clk_mux.h>
				#include <dev/ofw/ofw_bus.h>
				#include <dev/ofw/ofw_bus_subr.h>

				#include "clock_common.h"

				#if 0
				#define DPRINTF(dev, msg...) device_printf(dev, msg)
				#else
				#define DPRINTF(dev, msg...)
				#endif

				void
				read_clock_cells(device_t dev, struct clock_cell_info *clk) {
				ssize_t numbytes_clocks;
				phandle_t node, parent, *cells;
				int index, ncells, rv;

				node = ofw_bus_get_node(dev);

				/* Get names of parent clocks */
				numbytes_clocks = OF_getproplen(node, "clocks");
				clk->num_clock_cells = numbytes_clocks / sizeof(cell_t);

				/* Allocate space and get clock cells content */
				clk->clock_cells = malloc(numbytes_clocks, M_DEVBUF, M_WAITOK\|M_ZERO);
				clk->clock_cells_ncells = malloc(clk->num_clock_cells*sizeof(uint8_t),
				M_DEVBUF, M_WAITOK\|M_ZERO);
				OF_getencprop(node, "clocks", clk->clock_cells, numbytes_clocks);

				/* Count number of clocks */
				clk->num_real_clocks = 0;
				for (index = 0; index < clk->num_clock_cells; index++) {
				rv = ofw_bus_parse_xref_list_alloc(node, "clocks", "#clock-cells",
				clk->num_real_clocks, &parent, &ncells, &cells);
				if (rv != 0)
				continue;

				if (cells != NULL)
				OF_prop_free(cells);

				clk->clock_cells_ncells[index] = ncells;
				index += ncells;
				clk->num_real_clocks++;
				}
				}

				int
				find_parent_clock_names(device_t dev, struct clock_cell_info clk, struct clknode_init_def def) {
				int index, clock_index, err;
				bool found_all = true;
				clk_t parent;

				/* Figure out names */
				for (index = 0, clock_index = 0; index < clk->num_clock_cells; index++) {
				/* Get name of parent clock */
				err = clk_get_by_ofw_index(dev, 0, clock_index, &parent);
				if (err != 0) {
				clock_index++;
				found_all = false;
				DPRINTF(dev, "Failed to find clock_cells[%d]=0x%x\n",
				index, clk->clock_cells[index]);

				index += clk->clock_cells_ncells[index];
				continue;
				}

				def->parent_names[clock_index] = clk_get_name(parent);
				clk_release(parent);

				DPRINTF(dev, "Found parent clock[%d/%d]: %s\n",
				clock_index, clk->num_real_clocks,
				def->parent_names[clock_index]);

				clock_index++;
				index += clk->clock_cells_ncells[index];
				}

				if (!found_all) {
				return 1;
				}

				free(clk->clock_cells, M_DEVBUF);
				free(clk->clock_cells_ncells, M_DEVBUF);
				return 0;
				}

				void
				create_clkdef(device_t dev, struct clock_cell_info clk, struct clknode_init_def def) {
				def->id = 1;

				clk_parse_ofw_clk_name(dev, ofw_bus_get_node(dev), &def->name);

				DPRINTF(dev, "node name: %s\n", def->name);

				def->parent_cnt = clk->num_real_clocks;
				def->parent_names = malloc(clk->num_real_clockssizeof(char ),
				M_OFWPROP, M_WAITOK);
				}
				void
				free_clkdef(struct clknode_init_def *def) {
				OF_prop_free(__DECONST(char *, def->name));
				OF_prop_free(def->parent_names);
				}