[src/trunk]: src/sys/arch/arm/sociox try to decode _DSD ACPI resource

[nisimura <nisimura%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/4035d26e3000
branches:  trunk
changeset: 746235:4035d26e3000
user:      nisimura <nisimura%NetBSD.org@localhost>
date:      Wed Mar 25 18:42:16 2020 +0000

description:
try to decode _DSD ACPI resource

diffstat:

 sys/arch/arm/sociox/sni_gpio.c |  26 ++++++++++++++++++++------
 1 files changed, 20 insertions(+), 6 deletions(-)

diffs (74 lines):

diff -r 0e45ec8ff408 -r 4035d26e3000 sys/arch/arm/sociox/sni_gpio.c
--- a/sys/arch/arm/sociox/sni_gpio.c    Wed Mar 25 18:37:08 2020 +0000
+++ b/sys/arch/arm/sociox/sni_gpio.c    Wed Mar 25 18:42:16 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: sni_gpio.c,v 1.3 2020/03/24 11:40:08 nisimura Exp $    */
+/*     $NetBSD: sni_gpio.c,v 1.4 2020/03/25 18:42:16 nisimura Exp $    */
 
 /*-
  * Copyright (c) 2020 The NetBSD Foundation, Inc.
@@ -34,7 +34,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sni_gpio.c,v 1.3 2020/03/24 11:40:08 nisimura Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sni_gpio.c,v 1.4 2020/03/25 18:42:16 nisimura Exp $");
 
 #include <sys/param.h>
 #include <sys/device.h>
@@ -88,6 +88,15 @@
  *    NC,         NC,         NC,           NC,
  *    NC,         NC,         PEC-PD26,     PEC-PD27,
  *    PEC-PD28,   PEC-PD29,   PEC-PD30,     PEC-PD31;
+ *
+ *    PD/PC/PB/PA 0-7 in this order.
+ *    DSW3-PIN1 -- what's "varstore" really this
+ *    DSW3-PIN3 -- tweek PCIe bus implementation error toggle
+ *
+ *  96board mezzanine
+ *    i2c  "/i2c@51221000"
+ *    spi  "/spi@54810000"
+ *    gpio "/gpio@51000000" pinA-L (10-25) level? sensitive
  */
 static void snigpio_attach_i(struct snigpio_softc *);
 static int snigpio_intr(void *);
@@ -154,7 +163,6 @@
        snigpio_attach_i(sc);
 
 /* dig FDT description to show 32 of GPIO line usage */
-/* DIPSW3 1-8 usage remain unclear */
 
        return;
  fail:
@@ -181,11 +189,13 @@
 {
        struct snigpio_softc * const sc = device_private(self);
        struct acpi_attach_args *aa = aux;
+       ACPI_HANDLE handle = aa->aa_node->ad_handle;
        bus_space_handle_t ioh;
        struct acpi_resources res;
        struct acpi_mem *mem;
        struct acpi_irq *irq;
        ACPI_STATUS rv;
+       char *list;
 
        rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS",
            &res, &acpi_resource_parse_ops_default);
@@ -215,10 +225,14 @@
        sc->sc_ioh = ioh;
        sc->sc_ios = mem->ar_length;
 
-       snigpio_attach_i(sc);
+       /* dig _DSD property to show 32 of GPIO line usage */
+       rv = acpi_dsd_string(handle, "gpio-line-names", &list);
+       if (ACPI_FAILURE(rv))
+               list = NULL;
+       else
+               aprint_normal_dev(self, "%s\n", list);
 
-/* dig _DSD property to show 32 of GPIO line usage */
-/* DIPSW3 1-8 usage remain unclear */
+       snigpio_attach_i(sc);
 
        acpi_resource_cleanup(&res);
        return;