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mesongxbb_aoclkc.c revision 1.1 
      1 /* $NetBSD: mesongxbb_aoclkc.c,v 1.1 2019/02/25 19:30:17 jmcneill Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2019 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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 
     31 __KERNEL_RCSID(1, "$NetBSD: mesongxbb_aoclkc.c,v 1.1 2019/02/25 19:30:17 jmcneill Exp $");
     32 
     33 #include <sys/param.h>
     34 #include <sys/bus.h>
     35 #include <sys/device.h>
     36 #include <sys/systm.h>
     37 
     38 #include <dev/fdt/fdtvar.h>
     39 
     40 #include <arm/amlogic/meson_clk.h>
     41 #include <arm/amlogic/mesongxbb_aoclkc.h>
     42 
     43 #define	AO_RTI_GEN_CTNL_REG0	0x40
     44 
     45 #define	GATE_PARENT		"mpeg-clk"
     46 
     47 static int mesongxbb_aoclkc_match(device_t, cfdata_t, void *);
     48 static void mesongxbb_aoclkc_attach(device_t, device_t, void *);
     49 
     50 static const char * const compatible[] = {
     51 	"amlogic,meson-gxbb-aoclkc",
     52 	NULL
     53 };
     54 
     55 CFATTACH_DECL_NEW(mesongxbb_aoclkc, sizeof(struct meson_clk_softc),
     56 	mesongxbb_aoclkc_match, mesongxbb_aoclkc_attach, NULL, NULL);
     57 
     58 static struct meson_clk_reset mesongxbb_aoclkc_resets[] = {
     59 	MESON_CLK_RESET(MESONGXBB_RESET_AO_REMOTE, AO_RTI_GEN_CTNL_REG0, 16),
     60 	MESON_CLK_RESET(MESONGXBB_RESET_AO_UART1, AO_RTI_GEN_CTNL_REG0, 17),
     61 	MESON_CLK_RESET(MESONGXBB_RESET_AO_I2C_MASTER, AO_RTI_GEN_CTNL_REG0, 18),
     62 	MESON_CLK_RESET(MESONGXBB_RESET_AO_I2C_SLAVE, AO_RTI_GEN_CTNL_REG0, 19),
     63 	MESON_CLK_RESET(MESONGXBB_RESET_AO_UART2, AO_RTI_GEN_CTNL_REG0, 22),
     64 	MESON_CLK_RESET(MESONGXBB_RESET_AO_IR_BLASTER, AO_RTI_GEN_CTNL_REG0, 23),
     65 };
     66 
     67 static struct meson_clk_clk mesongxbb_aoclkc_clks[] = {
     68 	MESON_CLK_GATE(MESONGXBB_CLOCK_AO_REMOTE, "remote_ao", GATE_PARENT, AO_RTI_GEN_CTNL_REG0, 0),
     69 	MESON_CLK_GATE(MESONGXBB_CLOCK_AO_I2C_MASTER, "i2c_master_ao", GATE_PARENT, AO_RTI_GEN_CTNL_REG0, 1),
     70 	MESON_CLK_GATE(MESONGXBB_CLOCK_AO_I2C_SLAVE, "i2c_slave_ao", GATE_PARENT, AO_RTI_GEN_CTNL_REG0, 2),
     71 	MESON_CLK_GATE(MESONGXBB_CLOCK_AO_UART1, "uart1_ao", GATE_PARENT, AO_RTI_GEN_CTNL_REG0, 3),
     72 	MESON_CLK_GATE(MESONGXBB_CLOCK_AO_UART2, "uart2_ao", GATE_PARENT, AO_RTI_GEN_CTNL_REG0, 5),
     73 	MESON_CLK_GATE(MESONGXBB_CLOCK_AO_IR_BLASTER, "ir_blaster_ao", GATE_PARENT, AO_RTI_GEN_CTNL_REG0, 6),
     74 };
     75 
     76 static int
     77 mesongxbb_aoclkc_match(device_t parent, cfdata_t cf, void *aux)
     78 {
     79 	struct fdt_attach_args * const faa = aux;
     80 
     81 	return of_match_compatible(faa->faa_phandle, compatible);
     82 }
     83 
     84 static void
     85 mesongxbb_aoclkc_attach(device_t parent, device_t self, void *aux)
     86 {
     87 	struct meson_clk_softc * const sc = device_private(self);
     88 	struct fdt_attach_args * const faa = aux;
     89 
     90 	sc->sc_dev = self;
     91 	sc->sc_phandle = faa->faa_phandle;
     92 	sc->sc_syscon = fdtbus_syscon_lookup(OF_parent(sc->sc_phandle));
     93 	if (sc->sc_syscon == NULL) {
     94 		aprint_error(": couldn't get syscon registers\n");
     95 		return;
     96 	}
     97 
     98 	sc->sc_resets = mesongxbb_aoclkc_resets;
     99 	sc->sc_nresets = __arraycount(mesongxbb_aoclkc_resets);
    100 
    101 	sc->sc_clks = mesongxbb_aoclkc_clks;
    102 	sc->sc_nclks = __arraycount(mesongxbb_aoclkc_clks);
    103 
    104 	meson_clk_attach(sc);
    105 
    106 	aprint_naive("\n");
    107 	aprint_normal(": Meson GXBB AO clock controller\n");
    108 
    109 	meson_clk_print(sc);
    110 }
    111