summaryrefslogtreecommitdiff
path: root/drivers/sysreset/sysreset_sti.c
diff options
context:
space:
mode:
authorPatrice Chotard <patrice.chotard@st.com>2017-02-21 13:37:06 +0100
committerTom Rini <trini@konsulko.com>2017-03-14 20:40:19 -0400
commit413788cef5a793b581afb0e4feb2f6e76309d6e6 (patch)
tree9bef66310069a72450aba605ad78fbab04563c99 /drivers/sysreset/sysreset_sti.c
parent347cb2edf96d1fcb10b0b98167533ee9e62c0c8e (diff)
STiH410: Add STi sysreset driver
Signed-off-by: Patrice Chotard <patrice.chotard@st.com> Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/sysreset/sysreset_sti.c')
-rw-r--r--drivers/sysreset/sysreset_sti.c82
1 files changed, 82 insertions, 0 deletions
diff --git a/drivers/sysreset/sysreset_sti.c b/drivers/sysreset/sysreset_sti.c
new file mode 100644
index 0000000000..9b58aa8e97
--- /dev/null
+++ b/drivers/sysreset/sysreset_sti.c
@@ -0,0 +1,82 @@
+/*
+ * (C) Copyright 2017 Patrice Chotard <patrice.chotard@st.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <regmap.h>
+#include <syscon.h>
+#include <sysreset.h>
+#include <asm/io.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct sti_sysreset_priv {
+ phys_addr_t base;
+};
+
+static int sti_sysreset_request(struct udevice *dev, enum sysreset_t type)
+{
+ struct sti_sysreset_priv *priv = dev_get_priv(dev);
+
+ generic_clear_bit(0, (void __iomem *)priv->base);
+
+ return -EINPROGRESS;
+}
+
+static int sti_sysreset_probe(struct udevice *dev)
+{
+ struct sti_sysreset_priv *priv = dev_get_priv(dev);
+ struct udevice *syscon;
+ struct regmap *regmap;
+ struct fdtdec_phandle_args syscfg_phandle;
+ int ret;
+
+ /* get corresponding syscon phandle */
+ ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev_of_offset(dev),
+ "st,syscfg", NULL, 0, 0,
+ &syscfg_phandle);
+ if (ret < 0) {
+ error("Can't get syscfg phandle: %d\n", ret);
+ return ret;
+ }
+
+ ret = uclass_get_device_by_of_offset(UCLASS_SYSCON,
+ syscfg_phandle.node,
+ &syscon);
+ if (ret) {
+ error("%s: uclass_get_device_by_of_offset failed: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ regmap = syscon_get_regmap(syscon);
+ if (!regmap) {
+ error("unable to get regmap for %s\n", syscon->name);
+ return -ENODEV;
+ }
+
+ priv->base = regmap->base;
+
+ return 0;
+}
+
+static struct sysreset_ops sti_sysreset = {
+ .request = sti_sysreset_request,
+};
+
+static const struct udevice_id sti_sysreset_ids[] = {
+ { .compatible = "st,stih407-restart" },
+ { }
+};
+
+U_BOOT_DRIVER(sysreset_sti) = {
+ .name = "sysreset_sti",
+ .id = UCLASS_SYSRESET,
+ .ops = &sti_sysreset,
+ .probe = sti_sysreset_probe,
+ .of_match = sti_sysreset_ids,
+ .priv_auto_alloc_size = sizeof(struct sti_sysreset_priv),
+};