Differential D24352 Diff 72137 sys/arm64/qoriq/clk/ls1046a_clkgen.c

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sys/arm64/qoriq/clk/ls1046a_clkgen.c

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				/*-
				* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
				*
				* Copyright (c) 2020 Alstom Group.
				* Copyright (c) 2020 Semihalf.
				*
				* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
				*/

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

				#include <sys/param.h>
				#include <sys/bus.h>
				#include <sys/kernel.h>
				#include <sys/module.h>
				#include <sys/mutex.h>
				#include <sys/rman.h>
				#include <machine/bus.h>

				#include <dev/fdt/simplebus.h>

				#include <dev/ofw/ofw_bus.h>
				#include <dev/ofw/ofw_bus_subr.h>

				#include <dev/extres/clk/clk_fixed.h>

				#include <arm64/qoriq/clk/qoriq_clkgen.h>

				static uint8_t ls1046a_pltfrm_pll_divs[] = {
				2, 4, 0
				};

				static struct qoriq_clk_pll_def ls1046a_pltfrm_pll = {
				.clkdef = {
				.name = "ls1046a_platform_pll",
				.id = QORIQ_CLK_ID(QORIQ_TYPE_PLATFORM_PLL, 0),
				.flags = 0
				},
				.offset = 0xC00,
				.shift = 1,
				mmelUnsubmitted Not Done Inline Actions There is no reason to obfuscate clock node name in this way, please use names from TRM mmel: There is no reason to obfuscate clock node name in this way, please use names from TRM
				.mask = 0x7E,
				.dividers = ls1046a_pltfrm_pll_divs,
				.flags = 0
				};

				static const uint8_t ls1046a_cga1_pll_divs[] = {
				2, 3, 4, 0
				};

				static struct qoriq_clk_pll_def ls1046a_cga1_pll = {
				.clkdef = {
				.name = "ls1046a_cga_pll1",
				.id = QORIQ_CLK_ID(QORIQ_TYPE_INTERNAL, 0),
				.flags = 0
				},
				.offset = 0x800,
				.shift = 1,
				.mask = 0x1FE,
				.dividers = ls1046a_cga1_pll_divs,
				.flags = QORIQ_CLK_PLL_HAS_KILL_BIT
				};

				static struct qoriq_clk_pll_def ls1046a_cga2_pll = {
				.clkdef = {
				.name = "ls1046a_cga_pll2",
				.id = QORIQ_CLK_ID(QORIQ_TYPE_INTERNAL, 20),
				.flags = 0
				},
				.offset = 0x820,
				.shift = 1,
				.mask = 0x1FE,
				.dividers = ls1046a_cga1_pll_divs,
				.flags = QORIQ_CLK_PLL_HAS_KILL_BIT
				};

				static struct qoriq_clk_pll_def *ls1046a_cga_plls[] = {
				&ls1046a_cga1_pll,
				&ls1046a_cga2_pll
				};

				static const char *ls1046a_cmux0_parent_names[] = {
				"ls1046a_cga_pll1",
				NULL,
				"ls1046a_cga_pll1_div2",
				NULL,
				"ls1046a_cga_pll2",
				NULL,
				"ls1046a_cga_pll2_div2"
				};

				static struct clk_mux_def ls1046a_cmux0 = {
				.clkdef = {
				.name = "ls1046a_cmux0",
				.id = QORIQ_CLK_ID(QORIQ_TYPE_CMUX, 0),
				.parent_names = ls1046a_cmux0_parent_names,
				.parent_cnt = nitems(ls1046a_cmux0_parent_names),
				.flags = 0
				},
				.offset = 0,
				.shift = 27,
				.width = 4,
				.mux_flags = 0
				};

				static const char *ls1046a_hwaccel1_parent_names[] = {
				NULL,
				NULL,
				mmelUnsubmitted Not Done Inline Actions huh!. Use nitems() :) mmel: huh!. Use nitems() :)
				"ls1046a_cga_pll1_div2",
				"ls1046a_cga_pll1_div3",
				"ls1046a_cga_pll1_div4",
				"ls1046a_platform_pll",
				"ls1046a_cga_pll2_div2",
				"ls1046a_cga_pll2_div3"
				};

				static const char *ls1046a_hwaccel2_parent_names[] = {
				NULL,
				"ls1046a_cga_pll2",
				"ls1046a_cga_pll2_div2",
				"ls1046a_cga_pll2_div3",
				NULL,
				NULL,
				"ls1046a_cga_pll1_div2"
				};

				static struct clk_mux_def ls1046a_hwaccel1 = {
				.clkdef = {
				.name = "ls1046a_hwaccel1",
				.id = QORIQ_CLK_ID(QORIQ_TYPE_HWACCEL, 0),
				.parent_names = ls1046a_hwaccel1_parent_names,
				.parent_cnt = nitems(ls1046a_hwaccel1_parent_names),
				.flags = 0
				},
				.offset = 0x10,
				.shift = 27,
				.width = 4,
				.mux_flags = 0
				};

				static struct clk_mux_def ls1046a_hwaccel2 = {
				.clkdef = {
				.name = "ls1046a_hwaccel2",
				.id = QORIQ_CLK_ID(QORIQ_TYPE_HWACCEL, 1),
				.parent_names = ls1046a_hwaccel2_parent_names,
				.parent_cnt = nitems(ls1046a_hwaccel2_parent_names),
				.flags = 0
				},
				.offset = 0x30,
				.shift = 27,
				.width = 4,
				.mux_flags = 0
				};

				static struct clk_mux_def *ls1046a_mux_nodes[] = {
				manuUnsubmitted Not Done Inline Actions this is the same id as the hwaccel1, is that intentional ? If the clocks aren't exposed in the DTS an id of 0 is perfectly fine. manu: this is the same id as the hwaccel1, is that intentional ? If the clocks aren't exposed in the…
				dgr_semihalf.comAuthorUnsubmitted Not Done Inline Actions No, that was not intentional. Most of the clocks are exposed in dts, but due to using two clock cells in dts the custom ofw_mapper function finds clock based on name instead of id. dgr_semihalf.com: No, that was not intentional. Most of the clocks are exposed in dts, but due to using two clock…
				mmelUnsubmitted Not Done Inline Actions again this is wrong way. Simply encode both cells into one id and use it. mmel: again this is wrong way. Simply encode both cells into one id and use it.
				&ls1046a_cmux0,
				&ls1046a_hwaccel1,
				&ls1046a_hwaccel2
				};

				const char *ls1046a_fman_srcs[] = {
				"ls1046a_hwaccel1"
				};

				static int ls1046a_clkgen_probe(device_t);
				static int ls1046a_clkgen_attach(device_t);

				static device_method_t ls1046a_clkgen_methods[] = {
				DEVMETHOD(device_probe, ls1046a_clkgen_probe),
				DEVMETHOD(device_attach, ls1046a_clkgen_attach),

				DEVMETHOD_END
				};

				DEFINE_CLASS_1(ls1046a_clkgen, ls1046a_clkgen_driver, ls1046a_clkgen_methods,
				sizeof(struct qoriq_clkgen_softc), qoriq_clkgen_driver);

				static devclass_t ls1046a_clkgen_devclass;

				EARLY_DRIVER_MODULE(ls1046a_clkgen, simplebus, ls1046a_clkgen_driver,
				ls1046a_clkgen_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);

				static int
				ls1046a_fman_init(device_t dev)
				{
				struct qoriq_clkgen_softc *sc;
				struct clk_fixed_def def;
				int error;

				sc = device_get_softc(dev);

				def.clkdef.name = "ls1046a_fman",
				def.clkdef.id = QORIQ_CLK_ID(QORIQ_TYPE_FMAN, 0),
				def.clkdef.parent_names = ls1046a_fman_srcs;
				def.clkdef.parent_cnt = nitems(ls1046a_fman_srcs);
				manuUnsubmitted Not Done Inline Actions Why does this fixed clock needs a init function to be registered ? manu: Why does this fixed clock needs a init function to be registered ?
				dgr_semihalf.comAuthorUnsubmitted Not Done Inline Actions I used init function here as the way FMAN nodes work is specific to SoC, so different way of creating this node may be needed. dgr_semihalf.com: I used init function here as the way FMAN nodes work is specific to SoC, so different way of…
				def.clkdef.flags = 0;
				def.freq = 0;
				def.mult = 1;
				def.div = 1;
				def.fixed_flags = 0;

				error = clknode_fixed_register(sc->clkdom, &def);
				return (error);
				}

				static int
				ls1046a_clkgen_probe(device_t dev)
				{

				if (!ofw_bus_status_okay(dev))
				return (ENXIO);

				if(!ofw_bus_is_compatible(dev, "fsl,ls1046a-clockgen"))
				return (ENXIO);

				device_set_desc(dev, "LS1046A clockgen");
				return (BUS_PROBE_DEFAULT);
				}

				static int
				ls1046a_clkgen_attach(device_t dev)
				{
				struct qoriq_clkgen_softc *sc;

				sc = device_get_softc(dev);

				sc->pltfrm_pll_def = &ls1046a_pltfrm_pll;
				sc->cga_pll = ls1046a_cga_plls;
				sc->cga_pll_num = nitems(ls1046a_cga_plls);
				sc->mux = ls1046a_mux_nodes;
				sc->mux_num = nitems(ls1046a_mux_nodes);
				sc->init_func = ls1046a_fman_init;
				sc->flags = 0;

				return (qoriq_clkgen_attach(dev));
				}