Add initial reset driver for Allwinner H3_H5.
Implement reset deassert and assert functions for
USB OHCI, EHCI, OTG and PHY bus reset and clock registers.
Signed-off-by: Jagan Teki <ja...@amarulasolutions.com>
---
drivers/reset/sunxi/Kconfig | 7 ++
drivers/reset/sunxi/Makefile | 1 +
drivers/reset/sunxi/reset_h3.c | 121 +++++++++++++++++++++++++++++++++
3 files changed, 129 insertions(+)
create mode 100644 drivers/reset/sunxi/reset_h3.c
diff --git a/drivers/reset/sunxi/Kconfig b/drivers/reset/sunxi/Kconfig
index c0dfa56071..5c3b79eb76 100644
--- a/drivers/reset/sunxi/Kconfig
+++ b/drivers/reset/sunxi/Kconfig
@@ -9,6 +9,13 @@ config RESET_SUNXI
if RESET_SUNXI
+config RESET_SUN8I_H3
+ bool "Reset driver for Allwinner H3/H5"
+ default MACH_SUNXI_H3_H5
+ help
+ This enables common reset driver support for platforms based
+ on Allwinner H3/H5 SoC.
+
config RESET_SUN50I_A64
bool "Reset driver for Allwinner A64"
default MACH_SUN50I
diff --git a/drivers/reset/sunxi/Makefile b/drivers/reset/sunxi/Makefile
index cc80b11818..6e4273b344 100644
--- a/drivers/reset/sunxi/Makefile
+++ b/drivers/reset/sunxi/Makefile
@@ -4,4 +4,5 @@
# SPDX-License-Identifier: GPL-2.0+
#
+obj-$(CONFIG_RESET_SUN8I_H3) += reset_h3.o
obj-$(CONFIG_RESET_SUN50I_A64) += reset_a64.o
diff --git a/drivers/reset/sunxi/reset_h3.c b/drivers/reset/sunxi/reset_h3.c
new file mode 100644
index 0000000000..e4794cadb9
--- /dev/null
+++ b/drivers/reset/sunxi/reset_h3.c
@@ -0,0 +1,121 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2018 Amarula Solutions B.V.
+ * Author: Jagan Teki <ja...@amarulasolutions.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <reset-uclass.h>
+#include <asm/io.h>
+#include <dm/lists.h>
+#include <dt-bindings/reset/sun8i-h3-ccu.h>
+
+struct h3_reset_priv {
+ void *base;
+};
+
+static int h3_reset_request(struct reset_ctl *reset_ctl)
+{
+ debug("%s(#%ld)\n", __func__, reset_ctl->id);
+
+ /* check dt-bindings/reset/sun8i-h3-ccu.h for max id */
+ if (reset_ctl->id > 54)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int h3_reset_free(struct reset_ctl *reset_ctl)
+{
+ debug("%s(#%ld)\n", __func__, reset_ctl->id);
+
+ return 0;
+}
+
+static int h3_reset_assert(struct reset_ctl *reset_ctl)
+{
+ struct h3_reset_priv *priv = dev_get_priv(reset_ctl->dev);
+
+ debug("%s(#%ld)\n", __func__, reset_ctl->id);
+
+ switch (reset_ctl->id) {
+ case RST_USB_PHY0:
+ case RST_USB_PHY1:
+ case RST_USB_PHY2:
+ case RST_USB_PHY3:
+ clrbits_le32(priv->base + 0x0cc, BIT(reset_ctl->id));
+ return 0;
+ case RST_BUS_OTG:
+ case RST_BUS_EHCI0:
+ case RST_BUS_EHCI1:
+ case RST_BUS_EHCI2:
+ case RST_BUS_EHCI3:
+ case RST_BUS_OHCI0:
+ case RST_BUS_OHCI1:
+ case RST_BUS_OHCI2:
+ case RST_BUS_OHCI3:
+ clrbits_le32(priv->base + 0x2c0,
+ BIT(23 + (reset_ctl->id - RST_BUS_OTG)));
+ return 0;
+ default:
+ debug("%s (RST#%ld) unhandled\n", __func__, reset_ctl->id);
+ return -ENODEV;
+ }
+}
+
+static int h3_reset_deassert(struct reset_ctl *reset_ctl)
+{
+ struct h3_reset_priv *priv = dev_get_priv(reset_ctl->dev);
+
+ debug("%s(#%ld)\n", __func__, reset_ctl->id);
+
+ switch (reset_ctl->id) {
+ case RST_USB_PHY0:
+ case RST_USB_PHY1:
+ case RST_USB_PHY2:
+ case RST_USB_PHY3:
+ setbits_le32(priv->base + 0x0cc, BIT(reset_ctl->id));
+ return 0;
+ case RST_BUS_OTG:
+ case RST_BUS_EHCI0:
+ case RST_BUS_EHCI1:
+ case RST_BUS_EHCI2:
+ case RST_BUS_EHCI3:
+ case RST_BUS_OHCI0:
+ case RST_BUS_OHCI1:
+ case RST_BUS_OHCI2:
+ case RST_BUS_OHCI3:
+ setbits_le32(priv->base + 0x2c0,
+ BIT(23 + (reset_ctl->id - RST_BUS_OTG)));
+ return 0;
+ default:
+ debug("%s (RST#%ld) unhandled\n", __func__, reset_ctl->id);
+ return -ENODEV;
+ }
+}
+
+struct reset_ops h3_reset_ops = {
+ .request = h3_reset_request,
+ .free = h3_reset_free,
+ .rst_assert = h3_reset_assert,
+ .rst_deassert = h3_reset_deassert,
+};
+
+static int h3_reset_probe(struct udevice *dev)
+{
+ struct h3_reset_priv *priv = dev_get_priv(dev);
+
+ priv->base = dev_read_addr_ptr(dev);
+
+ return 0;
+}
+
+U_BOOT_DRIVER(reset_sun8i_h3) = {
+ .name = "sun8i_h3_reset",
+ .id = UCLASS_RESET,
+ .ops = &h3_reset_ops,
+ .probe = h3_reset_probe,
+ .priv_auto_alloc_size = sizeof(struct h3_reset_priv),
+};
--
2.17.1
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