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exynos_pinctrl.c revision 1.3 
      1 /*	$NetBSD: exynos_pinctrl.c,v 1.3 2015/12/21 04:58:50 marty Exp $ */
      2 
      3 /*-
      4 * Copyright (c) 2015 The NetBSD Foundation, Inc.
      5 * All rights reserved.
      6 *
      7 * This code is derived from software contributed to The NetBSD Foundation
      8 * by Marty Fouts
      9 *
     10 * Redistribution and use in source and binary forms, with or without
     11 * modification, are permitted provided that the following conditions
     12 * are met:
     13 * 1. Redistributions of source code must retain the above copyright
     14 *    notice, this list of conditions and the following disclaimer.
     15 * 2. Redistributions in binary form must reproduce the above copyright
     16 *    notice, this list of conditions and the following disclaimer in the
     17 *    documentation and/or other materials provided with the distribution.
     18 *
     19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29 * POSSIBILITY OF SUCH DAMAGE.
     30 */
     31 
     32 #include "opt_exynos.h"
     33 #include "opt_arm_debug.h"
     34 #include "gpio.h"
     35 
     36 #include <sys/cdefs.h>
     37 __KERNEL_RCSID(1, "$NetBSD: exynos_pinctrl.c,v 1.3 2015/12/21 04:58:50 marty Exp $");
     38 
     39 #include <sys/param.h>
     40 #include <sys/bus.h>
     41 #include <sys/device.h>
     42 #include <sys/intr.h>
     43 #include <sys/systm.h>
     44 #include <sys/kmem.h>
     45 #include <sys/gpio.h>
     46 
     47 #include <dev/gpio/gpiovar.h>
     48 
     49 #include <arm/samsung/exynos_reg.h>
     50 #include <arm/samsung/exynos_var.h>
     51 #include <arm/samsung/exynos_intr.h>
     52 #include <arm/samsung/exynos_pinctrl.h>
     53 
     54 #include <dev/fdt/fdtvar.h>
     55 
     56 static int exynos_pinctrl_match(device_t, cfdata_t, void *);
     57 static void exynos_pinctrl_attach(device_t, device_t, void *);
     58 
     59 CFATTACH_DECL_NEW(exynos_pinctrl, sizeof(struct exynos_pinctrl_softc),
     60 	exynos_pinctrl_match, exynos_pinctrl_attach, NULL, NULL);
     61 
     62 static int
     63 exynos_pinctrl_match(device_t parent, cfdata_t cf, void *aux)
     64 {
     65 	const char * const compatible[] = { "samsung,exynos5422-pinctrl",
     66 					    NULL };
     67 	struct fdt_attach_args * const faa = aux;
     68 	return of_match_compatible(faa->faa_phandle, compatible);
     69 }
     70 
     71 static void
     72 exynos_pinctrl_attach(device_t parent, device_t self, void *aux)
     73 {
     74 	struct exynos_pinctrl_softc * const sc
     75 		= kmem_zalloc(sizeof(*sc), KM_SLEEP);
     76 	struct fdt_attach_args * const faa = aux;
     77 	bus_addr_t addr;
     78 	bus_size_t size;
     79 	int error;
     80 	int child;
     81 
     82 	if (fdtbus_get_reg(faa->faa_phandle, 0, &addr, &size) != 0) {
     83 		aprint_error(": couldn't get registers\n");
     84 		return;
     85 	}
     86 
     87 	aprint_normal(" pinctl @ 0x%08x", (uint)addr);
     88 	sc->sc_dev = self;
     89 	sc->sc_bst = faa->faa_bst;
     90 	error = bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh);
     91 	if (error) {
     92 		aprint_error(": couldn't map %#llx: %d",
     93 			     (uint64_t)addr, error);
     94 		return;
     95 	}
     96 
     97 	for (child = OF_child(faa->faa_phandle); child;
     98 	     child = OF_peer(child)) {
     99 		char result[64];
    100 		error = OF_getprop(child, "gpio-controller", result,
    101 				   sizeof(result));
    102 		if (error == -1)
    103 			continue;
    104 		exynos_gpio_bank_config(sc,child);
    105 	}
    106 
    107 	aprint_naive("\n");
    108 	aprint_normal("\n");
    109 
    110 }
    111