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try to decode _DSD ACPI resource

This commit is contained in:
nisimura 2020-03-25 18:42:16 +00:00
parent 3178d52ed6
commit 15e52fec4c
1 changed files with 20 additions and 6 deletions
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26
sys/arch/arm/sociox/sni_gpio.c
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@ -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 @@ CFATTACH_DECL_NEW(snigpio_acpi, sizeof(struct snigpio_softc),
* 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_fdt_attach(device_t parent, device_t self, void *aux)
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 @@ snigpio_acpi_attach(device_t parent, device_t self, void *aux)
{
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 @@ snigpio_acpi_attach(device_t parent, device_t self, void *aux)
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;