arm64: allwinner: Add new clock aw_clk_np
This is a clock type present in Allwinner H6 where the formula is : f = fparent * N / P MFC after: 1 month
This commit is contained in:
parent
59c7842efe
commit
fcc82a8310
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=353525
@ -316,6 +316,10 @@ aw_ccung_attach(device_t dev)
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break;
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case AW_CLK_MIPI:
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aw_clk_mipi_register(sc->clkdom, sc->clks[i].clk.mipi);
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break;
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case AW_CLK_NP:
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aw_clk_np_register(sc->clkdom, sc->clks[i].clk.np);
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break;
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}
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}
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@ -35,6 +35,7 @@
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#include <arm/allwinner/clkng/aw_clk_mipi.h>
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#include <arm/allwinner/clkng/aw_clk_nkmp.h>
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#include <arm/allwinner/clkng/aw_clk_nm.h>
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#include <arm/allwinner/clkng/aw_clk_np.h>
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#include <arm/allwinner/clkng/aw_clk_prediv_mux.h>
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#include <arm/allwinner/clkng/aw_clk_frac.h>
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#include <dev/extres/clk/clk_mux.h>
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@ -52,6 +53,7 @@ enum aw_ccung_clk_type {
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AW_CLK_FRAC,
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AW_CLK_M,
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AW_CLK_MIPI,
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AW_CLK_NP,
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};
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struct aw_ccung_clk {
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@ -66,6 +68,7 @@ struct aw_ccung_clk {
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struct aw_clk_frac_def *frac;
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struct aw_clk_m_def *m;
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struct aw_clk_mipi_def *mipi;
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struct aw_clk_np_def *np;
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} clk;
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};
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@ -407,6 +407,35 @@ aw_clk_factor_get_value(struct aw_clk_factor *factor, uint32_t raw)
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.flags = _flags, \
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}
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#define NP_CLK(_clkname, _id, _name, _pnames, \
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_offset, \
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_nshift, _nwidth, _nvalue, _nflags, \
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_pshift, _pwidth, _pvalue, _pflags, \
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_gate_shift, \
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_lock, _lock_retries, \
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_flags) \
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static struct aw_clk_np_def _clkname = { \
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.clkdef = { \
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.id = _id, \
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.name = _name, \
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.parent_names = _pnames, \
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.parent_cnt = nitems(_pnames), \
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}, \
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.offset = _offset, \
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.n.shift = _nshift, \
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.n.width = _nwidth, \
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.n.value = _nvalue, \
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.n.flags = _nflags, \
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.p.shift = _pshift, \
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.p.width = _pwidth, \
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.p.value = _pvalue, \
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.p.flags = _pflags, \
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.gate_shift = _gate_shift, \
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.lock_shift = _lock, \
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.lock_retries = _lock_retries, \
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.flags = _flags, \
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}
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#define PREDIV_CLK(_clkname, _id, _name, _pnames, \
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_offset, \
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_mux_shift, _mux_width, \
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267
sys/arm/allwinner/clkng/aw_clk_np.c
Normal file
267
sys/arm/allwinner/clkng/aw_clk_np.c
Normal file
@ -0,0 +1,267 @@
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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) 2019 Emmanuel Vadot <manu@freebsd.org>
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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,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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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 <dev/extres/clk/clk.h>
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#include <arm/allwinner/clkng/aw_clk.h>
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#include <arm/allwinner/clkng/aw_clk_np.h>
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#include "clkdev_if.h"
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/*
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* clknode for clocks matching the formula :
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*
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* clk = clkin * n / p
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*
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*/
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struct aw_clk_np_sc {
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uint32_t offset;
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struct aw_clk_factor n;
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struct aw_clk_factor p;
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uint32_t gate_shift;
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uint32_t lock_shift;
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uint32_t lock_retries;
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uint32_t flags;
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};
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#define WRITE4(_clk, off, val) \
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CLKDEV_WRITE_4(clknode_get_device(_clk), off, val)
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#define READ4(_clk, off, val) \
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CLKDEV_READ_4(clknode_get_device(_clk), off, val)
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#define DEVICE_LOCK(_clk) \
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CLKDEV_DEVICE_LOCK(clknode_get_device(_clk))
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#define DEVICE_UNLOCK(_clk) \
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CLKDEV_DEVICE_UNLOCK(clknode_get_device(_clk))
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static int
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aw_clk_np_init(struct clknode *clk, device_t dev)
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{
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struct aw_clk_np_sc *sc;
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sc = clknode_get_softc(clk);
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clknode_init_parent_idx(clk, 0);
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return (0);
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}
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static int
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aw_clk_np_set_gate(struct clknode *clk, bool enable)
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{
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struct aw_clk_np_sc *sc;
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uint32_t val;
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sc = clknode_get_softc(clk);
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if ((sc->flags & AW_CLK_HAS_GATE) == 0)
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return (0);
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DEVICE_LOCK(clk);
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READ4(clk, sc->offset, &val);
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if (enable)
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val |= (1 << sc->gate_shift);
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else
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val &= ~(1 << sc->gate_shift);
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WRITE4(clk, sc->offset, val);
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DEVICE_UNLOCK(clk);
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return (0);
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}
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static uint64_t
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aw_clk_np_find_best(struct aw_clk_np_sc *sc, uint64_t fparent, uint64_t *fout,
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uint32_t *factor_n, uint32_t *factor_p)
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{
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uint64_t cur, best;
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uint32_t n, p, max_n, max_p, min_n, min_p;
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*factor_n = *factor_p = 0;
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max_n = aw_clk_factor_get_max(&sc->n);
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max_p = aw_clk_factor_get_max(&sc->p);
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min_n = aw_clk_factor_get_min(&sc->n);
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min_p = aw_clk_factor_get_min(&sc->p);
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for (p = min_p; p <= max_p; ) {
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for (n = min_n; n <= max_n; ) {
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cur = fparent * n / p;
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if (abs(*fout - cur) < abs(*fout - best)) {
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best = cur;
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*factor_n = n;
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*factor_p = p;
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}
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n++;
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}
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p++;
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}
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return (best);
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}
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static int
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aw_clk_np_set_freq(struct clknode *clk, uint64_t fparent, uint64_t *fout,
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int flags, int *stop)
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{
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struct aw_clk_np_sc *sc;
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uint64_t cur, best;
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uint32_t val, n, p, best_n, best_p;
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int retry;
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sc = clknode_get_softc(clk);
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best = cur = 0;
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best = aw_clk_np_find_best(sc, fparent, fout,
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&best_n, &best_p);
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if ((flags & CLK_SET_DRYRUN) != 0) {
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*fout = best;
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*stop = 1;
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return (0);
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}
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if ((best < *fout) &&
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((flags & CLK_SET_ROUND_DOWN) == 0)) {
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*stop = 1;
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return (ERANGE);
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}
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if ((best > *fout) &&
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((flags & CLK_SET_ROUND_UP) == 0)) {
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*stop = 1;
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return (ERANGE);
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}
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DEVICE_LOCK(clk);
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READ4(clk, sc->offset, &val);
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n = aw_clk_factor_get_value(&sc->n, best_n);
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p = aw_clk_factor_get_value(&sc->p, best_p);
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val &= ~sc->n.mask;
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val &= ~sc->p.mask;
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val |= n << sc->n.shift;
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val |= p << sc->p.shift;
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WRITE4(clk, sc->offset, val);
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DEVICE_UNLOCK(clk);
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if ((sc->flags & AW_CLK_HAS_LOCK) != 0) {
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for (retry = 0; retry < sc->lock_retries; retry++) {
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READ4(clk, sc->offset, &val);
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if ((val & (1 << sc->lock_shift)) != 0)
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break;
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DELAY(1000);
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}
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}
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*fout = best;
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*stop = 1;
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return (0);
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}
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static int
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aw_clk_np_recalc(struct clknode *clk, uint64_t *freq)
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{
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struct aw_clk_np_sc *sc;
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uint32_t val, n, p;
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sc = clknode_get_softc(clk);
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DEVICE_LOCK(clk);
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READ4(clk, sc->offset, &val);
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DEVICE_UNLOCK(clk);
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n = aw_clk_get_factor(val, &sc->n);
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p = aw_clk_get_factor(val, &sc->p);
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*freq = *freq * n / p;
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return (0);
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}
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static clknode_method_t aw_np_clknode_methods[] = {
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/* Device interface */
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CLKNODEMETHOD(clknode_init, aw_clk_np_init),
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CLKNODEMETHOD(clknode_set_gate, aw_clk_np_set_gate),
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CLKNODEMETHOD(clknode_recalc_freq, aw_clk_np_recalc),
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CLKNODEMETHOD(clknode_set_freq, aw_clk_np_set_freq),
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CLKNODEMETHOD_END
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};
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DEFINE_CLASS_1(aw_np_clknode, aw_np_clknode_class, aw_np_clknode_methods,
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sizeof(struct aw_clk_np_sc), clknode_class);
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int
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aw_clk_np_register(struct clkdom *clkdom, struct aw_clk_np_def *clkdef)
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{
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struct clknode *clk;
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struct aw_clk_np_sc *sc;
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clk = clknode_create(clkdom, &aw_np_clknode_class, &clkdef->clkdef);
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if (clk == NULL)
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return (1);
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sc = clknode_get_softc(clk);
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sc->offset = clkdef->offset;
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sc->n.shift = clkdef->n.shift;
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sc->n.width = clkdef->n.width;
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sc->n.mask = ((1 << sc->n.width) - 1) << sc->n.shift;
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sc->n.value = clkdef->n.value;
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sc->n.flags = clkdef->n.flags;
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sc->p.shift = clkdef->p.shift;
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sc->p.width = clkdef->p.width;
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sc->p.mask = ((1 << sc->p.width) - 1) << sc->p.shift;
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sc->p.value = clkdef->p.value;
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sc->p.flags = clkdef->p.flags;
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sc->gate_shift = clkdef->gate_shift;
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sc->lock_shift = clkdef->lock_shift;
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sc->lock_retries = clkdef->lock_retries;
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sc->flags = clkdef->flags;
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clknode_register(clkdom, clk);
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return (0);
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}
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51
sys/arm/allwinner/clkng/aw_clk_np.h
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51
sys/arm/allwinner/clkng/aw_clk_np.h
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@ -0,0 +1,51 @@
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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) 2019 Emmanuel Vadot <manu@freebsd.org>
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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 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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||||
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef __AW_CLK_NP_H__
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#define __AW_CLK_NP_H__
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#include <dev/extres/clk/clk.h>
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struct aw_clk_np_def {
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struct clknode_init_def clkdef;
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uint32_t offset;
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struct aw_clk_factor n;
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struct aw_clk_factor p;
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uint32_t gate_shift;
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uint32_t lock_shift;
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uint32_t lock_retries;
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uint32_t flags;
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};
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int aw_clk_np_register(struct clkdom *clkdom, struct aw_clk_np_def *clkdef);
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#endif /* __AW_CLK_NP_H__ */
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@ -53,6 +53,7 @@ arm/allwinner/clkng/aw_clk_m.c optional aw_ccu fdt
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arm/allwinner/clkng/aw_clk_mipi.c optional aw_ccu fdt
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arm/allwinner/clkng/aw_clk_nkmp.c optional aw_ccu fdt
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arm/allwinner/clkng/aw_clk_nm.c optional aw_ccu fdt
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arm/allwinner/clkng/aw_clk_np.c optional aw_ccu fdt
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arm/allwinner/clkng/aw_clk_prediv_mux.c optional aw_ccu fdt
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arm/allwinner/clkng/ccu_a64.c optional soc_allwinner_a64 aw_ccu fdt
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arm/allwinner/clkng/ccu_h3.c optional soc_allwinner_h5 aw_ccu fdt
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