Add ARMADA38X gateclk control
This patch introduces basic gate control driver for Armada38x SoC. Each gate controls coreclk output to a given peripheral. Reviewed by: manu Obtained from: Semihalf Differential Revision: https://reviews.freebsd.org/D36455
This commit is contained in:
Albert Jakieła
Kornel Dulęba
parent
07c5be33f1
commit
4a4c6dc9a3
294
sys/arm/mv/clk/armada38x_gateclk.c
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294
sys/arm/mv/clk/armada38x_gateclk.c
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@ -0,0 +1,294 @@
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2022 Semihalf.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/rman.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <machine/bus.h>
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#include <dev/fdt/simplebus.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/extres/clk/clk.h>
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#include <dev/extres/clk/clk_gate.h>
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#include "clkdev_if.h"
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struct armada38x_gateclk_softc
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{
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struct clkdom *clkdom;
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struct mtx mtx;
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const char* parent;
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};
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static struct clk_gate_def gateclk_nodes[] =
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{
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{
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.clkdef = {
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.name = "gateclk-audio",
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.id = 0,
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.parent_cnt = 1,
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.flags = 0,
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},
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.shift = 0,
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},
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{
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.clkdef = {
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.name = "gateclk-eth2",
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.id = 2,
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.parent_cnt = 1,
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.flags = 0,
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},
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.shift = 2,
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},
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{
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.clkdef = {
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.name = "gateclk-eth1",
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.id = 3,
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.parent_cnt = 1,
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.flags = 0,
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},
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.shift = 3,
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},
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{
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.clkdef = {
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.name = "gateclk-eth0",
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.id = 4,
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.parent_cnt = 1,
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.flags = 0,
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},
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.shift = 4,
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},
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{
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.clkdef = {
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.name = "gateclk-mdio",
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.id = 4,
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.parent_cnt = 1,
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.flags = 0,
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},
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.shift = 4,
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},
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{
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.clkdef = {
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.name = "gateclk-usb3h0",
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.id = 9,
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.parent_cnt = 1,
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.flags = 0,
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},
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.shift = 9,
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},
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{
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.clkdef = {
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.name = "gateclk-usb3h1",
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.id = 10,
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.parent_cnt = 1,
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.flags = 0,
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},
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.shift = 10,
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},
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{
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.clkdef = {
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.name = "gateclk-bm",
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.id = 13,
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.parent_cnt = 1,
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.flags = 0,
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},
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.shift = 13,
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},
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{
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.clkdef = {
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.name = "gateclk-crypto0z",
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.id = 14,
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.parent_cnt = 1,
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.flags = 0,
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},
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.shift = 14,
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},
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{
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.clkdef = {
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.name = "gateclk-sata0",
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.id = 15,
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.parent_cnt = 1,
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.flags = 0,
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},
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.shift = 15,
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},
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{
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.clkdef = {
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.name = "gateclk-crypto1z",
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.id = 16,
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.parent_cnt = 1,
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.flags = 0,
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},
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.shift = 16,
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},
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{
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.clkdef = {
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.name = "gateclk-sdio",
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.id = 17,
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.parent_cnt = 1,
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.flags = 0,
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},
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.shift = 17,
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},
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{
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.clkdef = {
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.name = "gateclk-usb2",
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.id = 18,
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.parent_cnt = 1,
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.flags = 0,
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},
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.shift = 18,
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},
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{
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.clkdef = {
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.name = "gateclk-crypto1",
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.id = 21,
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.parent_cnt = 1,
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.flags = 0,
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},
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.shift = 21,
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},
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{
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.clkdef = {
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.name = "gateclk-xor0",
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.id = 22,
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.parent_cnt = 1,
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.flags = 0,
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},
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.shift = 22,
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},
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{
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.clkdef = {
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.name = "gateclk-crypto0",
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.id = 23,
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.parent_cnt = 1,
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.flags = 0,
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},
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.shift = 23,
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},
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{
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.clkdef = {
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.name = "gateclk-xor1",
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.id = 28,
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.parent_cnt = 1,
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.flags = 0,
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},
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.shift = 28,
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},
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{
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.clkdef = {
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.name = "gateclk-sata1",
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.id = 30,
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.parent_cnt = 1,
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.flags = 0,
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},
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.shift = 30,
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}
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};
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static int armada38x_gateclk_probe(device_t dev);
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static int armada38x_gateclk_attach(device_t dev);
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static device_method_t armada38x_gateclk_methods[] = {
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DEVMETHOD(device_probe, armada38x_gateclk_probe),
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DEVMETHOD(device_attach, armada38x_gateclk_attach),
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DEVMETHOD_END
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};
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static driver_t armada38x_gateclk_driver = {
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"armada38x_gateclk",
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armada38x_gateclk_methods,
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sizeof(struct armada38x_gateclk_softc),
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};
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EARLY_DRIVER_MODULE(armada38x_gateclk, simplebus, armada38x_gateclk_driver, 0, 0,
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BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE + 1);
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static int
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armada38x_gateclk_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if(!ofw_bus_is_compatible(dev, "marvell,armada-380-gating-clock"))
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return (ENXIO);
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device_set_desc(dev, "ARMADA38X gateclk");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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armada38x_gateclk_attach(device_t dev)
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{
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struct armada38x_gateclk_softc *sc;
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phandle_t node;
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int i, error;
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clk_t clock;
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sc = device_get_softc(dev);
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node = ofw_bus_get_node(dev);
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mtx_init(&sc->mtx, device_get_nameunit(dev), NULL, MTX_DEF);
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sc->clkdom = clkdom_create(dev);
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if (sc->clkdom == NULL) {
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device_printf(dev, "Cannot create clock domain.\n");
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return (ENXIO);
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}
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error = clk_get_by_ofw_index(dev, node, 0, &clock);
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if (error > 0)
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return (error);
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sc->parent = clk_get_name(clock);
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for (i = 0; i < nitems(gateclk_nodes); ++i) {
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gateclk_nodes[i].clkdef.parent_names = &sc->parent;
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error = clknode_gate_register(sc->clkdom, &gateclk_nodes[i]);
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if (error != 0) {
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device_printf(dev, "Cannot create gate nodes\n");
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return (error);
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}
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}
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if (clkdom_finit(sc->clkdom) != 0)
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panic("Cannot finalize clock domain initialization.\n");
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return (0);
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}
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@ -37,3 +37,4 @@ dev/ahci/ahci_mv_fdt.c optional ahci
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arm/mv/clk/armada38x_coreclk.c standard
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arm/mv/clk/armada38x_gen.c standard
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arm/mv/clk/armada38x_gateclk.c standard
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