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Fix the driver attachment in cases when the external resource devices

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(resets, regulators, clocks) are not available.

Rely on a system initialization done by a bootloader in that cases.

This fixes operation on Terasic DE10-Pro (an Intel Stratix 10
development kit).

Sponsored by:	DARPA, AFRL
This commit is contained in:
Ruslan Bukin 2019-10-14 15:52:59 +00:00
parent 5f5ec65aaf
commit 3ee93b74c7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=353493
1 changed files with 9 additions and 17 deletions
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26
sys/dev/mmc/host/dwmmc.c
View File

@ -1,5 +1,5 @@
/*-
* Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
* Copyright (c) 2014-2019 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* This software was developed by SRI International and the University of
@ -457,26 +457,20 @@ parse_fdt(struct dwmmc_softc *sc)
/* IP block reset is optional */
error = hwreset_get_by_ofw_name(sc->dev, 0, "reset", &sc->hwreset);
if (error != 0 && error != ENOENT) {
if (error != 0 && error != ENOENT)
device_printf(sc->dev, "Cannot get reset\n");
goto fail;
}
/* vmmc regulator is optional */
error = regulator_get_by_ofw_property(sc->dev, 0, "vmmc-supply",
&sc->vmmc);
if (error != 0 && error != ENOENT) {
if (error != 0 && error != ENOENT)
device_printf(sc->dev, "Cannot get regulator 'vmmc-supply'\n");
goto fail;
}
/* vqmmc regulator is optional */
error = regulator_get_by_ofw_property(sc->dev, 0, "vqmmc-supply",
&sc->vqmmc);
if (error != 0 && error != ENOENT) {
if (error != 0 && error != ENOENT)
device_printf(sc->dev, "Cannot get regulator 'vqmmc-supply'\n");
goto fail;
}
/* Assert reset first */
if (sc->hwreset != NULL) {
@ -489,10 +483,9 @@ parse_fdt(struct dwmmc_softc *sc)
/* BIU (Bus Interface Unit clock) is optional */
error = clk_get_by_ofw_name(sc->dev, 0, "biu", &sc->biu);
if (error != 0 && error != ENOENT) {
if (error != 0 && error != ENOENT)
device_printf(sc->dev, "Cannot get 'biu' clock\n");
goto fail;
}
if (sc->biu) {
error = clk_enable(sc->biu);
if (error != 0) {
@ -506,10 +499,9 @@ parse_fdt(struct dwmmc_softc *sc)
* if no clock-frequency property is given
*/
error = clk_get_by_ofw_name(sc->dev, 0, "ciu", &sc->ciu);
if (error != 0 && error != ENOENT) {
device_printf(sc->dev, "Cannot get 'ciu'clock\n");
goto fail;
}
if (error != 0 && error != ENOENT)
device_printf(sc->dev, "Cannot get 'ciu' clock\n");
if (sc->ciu) {
if (bus_hz != 0) {
error = clk_set_freq(sc->ciu, bus_hz, 0);