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      1 /* $NetBSD: cdnsiic_fdt.c,v 1.3 2025/09/16 11:55:17 thorpej Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2022 Jared McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 
     31 __KERNEL_RCSID(0, "$NetBSD: cdnsiic_fdt.c,v 1.3 2025/09/16 11:55:17 thorpej Exp $");
     32 
     33 #include <sys/param.h>
     34 #include <sys/bus.h>
     35 #include <sys/device.h>
     36 #include <sys/intr.h>
     37 #include <sys/systm.h>
     38 #include <sys/time.h>
     39 #include <sys/kmem.h>
     40 
     41 #include <dev/i2c/i2cvar.h>
     42 
     43 #include <dev/fdt/fdtvar.h>
     44 #include <dev/ic/cdnsiicvar.h>
     45 
     46 static const struct device_compatible_entry compat_data[] = {
     47 	{ .compat = "cdns,i2c-r1p10" },
     48 	{ .compat = "cdns,i2c-r1p14" },
     49 	DEVICE_COMPAT_EOL
     50 };
     51 
     52 static int
     53 cdnsiic_fdt_match(device_t parent, cfdata_t cf, void *aux)
     54 {
     55 	struct fdt_attach_args * const faa = aux;
     56 
     57 	return of_compatible_match(faa->faa_phandle, compat_data);
     58 }
     59 
     60 static void
     61 cdnsiic_fdt_attach(device_t parent, device_t self, void *aux)
     62 {
     63 	struct cdnsiic_softc * const sc = device_private(self);
     64 	struct fdt_attach_args * const faa = aux;
     65 	const int phandle = faa->faa_phandle;
     66 	bus_addr_t addr;
     67 	bus_size_t size;
     68 	int error;
     69 
     70 	if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
     71 		aprint_error(": couldn't get registers\n");
     72 		return;
     73 	}
     74 
     75 	sc->sc_pclk = fdtbus_clock_get_index(phandle, 0);
     76 	if (sc->sc_pclk == NULL || clk_enable(sc->sc_pclk) != 0) {
     77 		aprint_error(": couldn't enable pclk\n");
     78 		return;
     79 	}
     80 
     81 	if (of_getprop_uint32(phandle, "clock-frequency", &sc->sc_bus_freq))
     82 		sc->sc_bus_freq = 100000;
     83 
     84 	sc->sc_dev = self;
     85 	sc->sc_bst = faa->faa_bst;
     86 	if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) {
     87 		aprint_error(": couldn't map registers\n");
     88 		return;
     89 	}
     90 
     91 	error = cdnsiic_attach(sc);
     92 	if (error != 0) {
     93 		aprint_error_dev(self, "init failed, error = %d\n", error);
     94 		return;
     95 	}
     96 
     97 	iicbus_attach(self, &sc->sc_ic);
     98 }
     99 
    100 CFATTACH_DECL_NEW(cdnsiic_fdt, sizeof(struct cdnsiic_softc),
    101     cdnsiic_fdt_match, cdnsiic_fdt_attach, NULL, NULL);
    102