From ac7e14ae0d36023dd32400a8eab9433a54e77b83 Mon Sep 17 00:00:00 2001 From: Simon Goldschmidt Date: Fri, 1 Mar 2019 20:12:35 +0100 Subject: [PATCH] spi: cadence_qspi: add reset handling 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 --- drivers/spi/cadence_qspi.c | 17 +++++++++++++++++ drivers/spi/cadence_qspi.h | 4 ++++ 2 files changed, 21 insertions(+) diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c index efdb178450..41c87004d8 100644 --- a/drivers/spi/cadence_qspi.c +++ b/drivers/spi/cadence_qspi.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include #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, }; diff --git a/drivers/spi/cadence_qspi.h b/drivers/spi/cadence_qspi.h index b491407130..20cceca239 100644 --- a/drivers/spi/cadence_qspi.h +++ b/drivers/spi/cadence_qspi.h @@ -7,6 +7,8 @@ #ifndef __CADENCE_QSPI_H__ #define __CADENCE_QSPI_H__ +#include + #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 */ -- 2.25.1