We can support the RSTCTRL reset registers on many TI SoCs with
reset-simple.
Note that some devices will also need to check the RSTST bits
for reset reason. Support for these could be possibly added to
the reset controller framework later on.
Cc: Dave Gerlach <d-gerlach@xxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Nishant Menon <nm@xxxxxx>
Cc: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Suman Anna <s-anna@xxxxxx>
Cc: Tero Kristo <t-kristo@xxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
---
Changes since v1:
- Update patch description to mention the unhandled RSTST bits
- Rebase against Linux next
---
.../devicetree/bindings/reset/ti-rstctrl.txt | 20 ++++++++++++++++++++
drivers/reset/Kconfig | 3 ++-
drivers/reset/reset-simple.c | 1 +
3 files changed, 23 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/reset/ti-rstctrl.txt
diff --git a/Documentation/devicetree/bindings/reset/ti-rstctrl.txt b/Documentation/devicetree/bindings/reset/ti-rstctrl.txt
new file mode 100644
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/ti-rstctrl.txt
@@ -0,0 +1,20 @@
+TI RSTCTRL Reset Controller
+
+Required properties:
+- compatible : "ti,rstctrl"
+- reg : Should contain 1 register ranges(address and length)
+- #reset-cells: 1
+
+Example:
+ prm_gfx: prm@1100 {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0 0x1100 0x100>;
+
+ gfx_rstctrl: rstctrl@4 {
+ compatible = "ti,rstctrl";
+ reg = <0x4 0x4>;
+ #reset-cells = <1>;
+ };
+ };
diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -84,7 +84,7 @@ config RESET_PISTACHIO
config RESET_SIMPLE
bool "Simple Reset Controller Driver" if COMPILE_TEST
- default ARCH_SOCFPGA || ARCH_STM32 || ARCH_STRATIX10 || ARCH_SUNXI || ARCH_ZX || ARCH_ASPEED
+ default ARCH_OMAP2PLUS || ARCH_SOCFPGA || ARCH_STM32 || ARCH_STRATIX10 || ARCH_SUNXI || ARCH_ZX || ARCH_ASPEED
help
This enables a simple reset controller driver for reset lines that
that can be asserted and deasserted by toggling bits in a contiguous,
@@ -95,6 +95,7 @@ config RESET_SIMPLE
- ASPEED BMC SoCs
- RCC reset controller in STM32 MCUs
- Allwinner SoCs
+ - TI SoCs
- ZTE's zx2967 family
config RESET_SUNXI
diff --git a/drivers/reset/reset-simple.c b/drivers/reset/reset-simple.c
--- a/drivers/reset/reset-simple.c
+++ b/drivers/reset/reset-simple.c
@@ -123,6 +123,7 @@ static const struct of_device_id reset_simple_dt_ids[] = {
{ .compatible = "st,stm32-rcc", },
{ .compatible = "allwinner,sun6i-a31-clock-reset",
.data = &reset_simple_active_low },
+ { .compatible = "ti,rstctrl", },
{ .compatible = "zte,zx296718-reset",
.data = &reset_simple_active_low },
{ .compatible = "aspeed,ast2400-lpc-reset" },
--
2.16.2
--
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