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spi: cadence_qspi: add reset handling

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This adds reset handling to the cadence qspi driver.

For backwards compatibility, only a warning is printed when failing to
get reset handles.

Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
This commit is contained in:
Simon Goldschmidt 2019-03-01 20:12:35 +01:00 committed by Marek Vasut
parent ed784ac382
commit ac7e14ae0d
2 changed files with 21 additions and 0 deletions
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17
drivers/spi/cadence_qspi.c
View file

@ -8,6 +8,7 @@
#include <dm.h>
#include <fdtdec.h>
#include <malloc.h>
#include <reset.h>
#include <spi.h>
#include <linux/errno.h>
#include "cadence_qspi.h"
@ -154,10 +155,17 @@ static int cadence_spi_probe(struct udevice *bus)
{
struct cadence_spi_platdata *plat = bus->platdata;
struct cadence_spi_priv *priv = dev_get_priv(bus);
int ret;
priv->regbase = plat->regbase;
priv->ahbbase = plat->ahbbase;
ret = reset_get_bulk(bus, &priv->resets);
if (ret)
dev_warn(bus, "Can't get reset: %d\n", ret);
else
reset_deassert_bulk(&priv->resets);
if (!priv->qspi_is_init) {
cadence_qspi_apb_controller_init(plat);
priv->qspi_is_init = 1;
@ -166,6 +174,13 @@ static int cadence_spi_probe(struct udevice *bus)
return 0;
}
static int cadence_spi_remove(struct udevice *dev)
{
struct cadence_spi_priv *priv = dev_get_priv(dev);
return reset_release_bulk(&priv->resets);
}
static int cadence_spi_set_mode(struct udevice *bus, uint mode)
{
struct cadence_spi_priv *priv = dev_get_priv(bus);
@ -342,4 +357,6 @@ U_BOOT_DRIVER(cadence_spi) = {
.platdata_auto_alloc_size = sizeof(struct cadence_spi_platdata),
.priv_auto_alloc_size = sizeof(struct cadence_spi_priv),
.probe = cadence_spi_probe,
.remove = cadence_spi_remove,
.flags = DM_FLAG_OS_PREPARE,
};

4
drivers/spi/cadence_qspi.h
View file

@ -7,6 +7,8 @@
#ifndef __CADENCE_QSPI_H__
#define __CADENCE_QSPI_H__
#include <reset.h>
#define CQSPI_IS_ADDR(cmd_len) (cmd_len > 1 ? 1 : 0)
#define CQSPI_NO_DECODER_MAX_CS 4
@ -42,6 +44,8 @@ struct cadence_spi_priv {
unsigned int qspi_calibrated_hz;
unsigned int qspi_calibrated_cs;
unsigned int previous_hz;
struct reset_ctl_bulk resets;
};
/* Functions call declaration */