88 lines
2.8 KiB
C
88 lines
2.8 KiB
C
/* $NetBSD: imx_i2c.c,v 1.3 2022/07/22 23:43:24 thorpej Exp $ */
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/*-
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* Copyright (c) 2019 Genetec Corporation. All rights reserved.
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* Written by Hashimoto Kenichi for Genetec Corporation.
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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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: imx_i2c.c,v 1.3 2022/07/22 23:43:24 thorpej Exp $");
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#include <sys/bus.h>
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#include <arm/imx/imxi2cvar.h>
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#include <dev/fdt/fdtvar.h>
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static const struct device_compatible_entry compat_data[] = {
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{ .compat = "fsl,imx21-i2c" },
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DEVICE_COMPAT_EOL
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};
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int
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imxi2c_match(device_t parent, cfdata_t cf, void *aux)
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{
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struct fdt_attach_args * const faa = aux;
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return of_compatible_match(faa->faa_phandle, compat_data);
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}
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void
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imxi2c_attach(device_t parent __unused, device_t self, void *aux)
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{
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struct imxi2c_softc *imxsc = device_private(self);
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struct fdt_attach_args * const faa = aux;
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const int phandle = faa->faa_phandle;
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bus_space_tag_t bst = faa->faa_bst;
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bus_addr_t addr;
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bus_size_t size;
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int error;
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if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
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aprint_error(": couldn't get registers\n");
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return;
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}
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imxsc->sc_clk = fdtbus_clock_get_index(phandle, 0);
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if (imxsc->sc_clk == NULL) {
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aprint_error(": couldn't get clock\n");
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return;
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}
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error = clk_enable(imxsc->sc_clk);
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if (error) {
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aprint_error_dev(self, "couldn't enable: %d\n", error);
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return;
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}
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u_int freq;
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error = of_getprop_uint32(phandle, "clock-frequency", &freq);
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if (error)
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freq = 100000;
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imxsc->sc_motoi2c.sc_phandle = phandle;
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imxi2c_attach_common(self, bst, addr, size,
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clk_get_rate(imxsc->sc_clk), freq);
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}
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