Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add a function to report if a regulator can support the requested voltage range

This commit is contained in:
jmcneill 2019-01-02 18:38:43 +00:00
parent b99660975e
commit cbe9be62d8
2 changed files with 30 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
sys/dev/fdt/fdt_regulator.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: fdt_regulator.c,v 1.6 2018/06/30 20:34:43 jmcneill Exp $ */
/* $NetBSD: fdt_regulator.c,v 1.7 2019/01/02 18:38:43 jmcneill Exp $ */
/*-
* Copyright (c) 2015 Jared D. McNeill <jmcneill@invisible.ca>
@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: fdt_regulator.c,v 1.6 2018/06/30 20:34:43 jmcneill Exp $");
__KERNEL_RCSID(0, "$NetBSD: fdt_regulator.c,v 1.7 2019/01/02 18:38:43 jmcneill Exp $");
#include <sys/param.h>
#include <sys/bus.h>
@ -130,6 +130,9 @@ fdtbus_regulator_disable(struct fdtbus_regulator *reg)
{
struct fdtbus_regulator_controller *rc = reg->reg_rc;
if (of_hasprop(rc->rc_phandle, "regulator-always-on"))
return EIO;
return rc->rc_funcs->enable(rc->rc_dev, false);
}
@ -155,3 +158,25 @@ fdtbus_regulator_get_voltage(struct fdtbus_regulator *reg, u_int *puvol)
return rc->rc_funcs->get_voltage(rc->rc_dev, puvol);
}
int
fdtbus_regulator_supports_voltage(struct fdtbus_regulator *reg, u_int min_uvol,
u_int max_uvol)
{
struct fdtbus_regulator_controller *rc = reg->reg_rc;
u_int uvol;
if (rc->rc_funcs->set_voltage == NULL)
return EINVAL;
if (of_getprop_uint32(rc->rc_phandle, "regulator-min-microvolt", &uvol) == 0) {
if (uvol < min_uvol)
return ERANGE;
}
if (of_getprop_uint32(rc->rc_phandle, "regulator-max-microvolt", &uvol) == 0) {
if (uvol > max_uvol)
return ERANGE;
}
return 0;
}

4
sys/dev/fdt/fdtvar.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: fdtvar.h,v 1.43 2019/01/02 14:54:54 jmcneill Exp $ */
/* $NetBSD: fdtvar.h,v 1.44 2019/01/02 18:38:43 jmcneill Exp $ */
/*-
* Copyright (c) 2015 Jared D. McNeill <jmcneill@invisible.ca>
@ -300,6 +300,8 @@ int fdtbus_regulator_set_voltage(struct fdtbus_regulator *,
u_int, u_int);
int fdtbus_regulator_get_voltage(struct fdtbus_regulator *,
u_int *);
int fdtbus_regulator_supports_voltage(struct fdtbus_regulator *,
u_int, u_int);
struct syscon * fdtbus_syscon_acquire(int, const char *);
struct syscon * fdtbus_syscon_lookup(int);