95 lines
3.3 KiB
Diff
95 lines
3.3 KiB
Diff
From 5f0bb9d0bc545ef53a83f7bd176fdc0736eed8e5 Mon Sep 17 00:00:00 2001
|
|
From: Jens Kuske <jenskuske@gmail.com>
|
|
Date: Tue, 27 Oct 2015 17:50:24 +0100
|
|
Subject: [PATCH] reset: sunxi: Add Allwinner H3 bus resets
|
|
|
|
The H3 bus resets have some holes between the registers, so we add
|
|
an of_xlate() function to skip them according to the datasheet.
|
|
|
|
Signed-off-by: Jens Kuske <jenskuske@gmail.com>
|
|
---
|
|
.../bindings/reset/allwinner,sunxi-clock-reset.txt | 1 +
|
|
drivers/reset/reset-sunxi.c | 30 +++++++++++++++++++---
|
|
2 files changed, 28 insertions(+), 3 deletions(-)
|
|
|
|
diff --git a/Documentation/devicetree/bindings/reset/allwinner,sunxi-clock-reset.txt b/Documentation/devicetree/bindings/reset/allwinner,sunxi-clock-reset.txt
|
|
index c8f77571..e11f023 100644
|
|
--- a/Documentation/devicetree/bindings/reset/allwinner,sunxi-clock-reset.txt
|
|
+++ b/Documentation/devicetree/bindings/reset/allwinner,sunxi-clock-reset.txt
|
|
@@ -8,6 +8,7 @@ Required properties:
|
|
- compatible: Should be one of the following:
|
|
"allwinner,sun6i-a31-ahb1-reset"
|
|
"allwinner,sun6i-a31-clock-reset"
|
|
+ "allwinner,sun8i-h3-bus-reset"
|
|
- reg: should be register base and length as documented in the
|
|
datasheet
|
|
- #reset-cells: 1, see below
|
|
diff --git a/drivers/reset/reset-sunxi.c b/drivers/reset/reset-sunxi.c
|
|
index 3d95c87..c91e146 100644
|
|
--- a/drivers/reset/reset-sunxi.c
|
|
+++ b/drivers/reset/reset-sunxi.c
|
|
@@ -75,7 +75,9 @@ static struct reset_control_ops sunxi_reset_ops = {
|
|
.deassert = sunxi_reset_deassert,
|
|
};
|
|
|
|
-static int sunxi_reset_init(struct device_node *np)
|
|
+static int sunxi_reset_init(struct device_node *np,
|
|
+ int (*of_xlate)(struct reset_controller_dev *rcdev,
|
|
+ const struct of_phandle_args *reset_spec))
|
|
{
|
|
struct sunxi_reset_data *data;
|
|
struct resource res;
|
|
@@ -108,6 +110,7 @@ static int sunxi_reset_init(struct device_node *np)
|
|
data->rcdev.nr_resets = size * 32;
|
|
data->rcdev.ops = &sunxi_reset_ops;
|
|
data->rcdev.of_node = np;
|
|
+ data->rcdev.of_xlate = of_xlate;
|
|
reset_controller_register(&data->rcdev);
|
|
|
|
return 0;
|
|
@@ -117,6 +120,21 @@ static int sunxi_reset_init(struct device_node *np)
|
|
return ret;
|
|
};
|
|
|
|
+static int sun8i_h3_bus_reset_xlate(struct reset_controller_dev *rcdev,
|
|
+ const struct of_phandle_args *reset_spec)
|
|
+{
|
|
+ unsigned int index = reset_spec->args[0];
|
|
+
|
|
+ if (index < 96)
|
|
+ return index;
|
|
+ else if (index < 128)
|
|
+ return index + 32;
|
|
+ else if (index < 160)
|
|
+ return index + 64;
|
|
+ else
|
|
+ return -EINVAL;
|
|
+}
|
|
+
|
|
/*
|
|
* These are the reset controller we need to initialize early on in
|
|
* our system, before we can even think of using a regular device
|
|
@@ -124,15 +142,21 @@ static int sunxi_reset_init(struct device_node *np)
|
|
*/
|
|
static const struct of_device_id sunxi_early_reset_dt_ids[] __initdata = {
|
|
{ .compatible = "allwinner,sun6i-a31-ahb1-reset", },
|
|
+ { .compatible = "allwinner,sun8i-h3-bus-reset", .data = sun8i_h3_bus_reset_xlate, },
|
|
{ /* sentinel */ },
|
|
};
|
|
|
|
void __init sun6i_reset_init(void)
|
|
{
|
|
struct device_node *np;
|
|
+ const struct of_device_id *match;
|
|
+ int (*of_xlate)(struct reset_controller_dev *rcdev,
|
|
+ const struct of_phandle_args *reset_spec);
|
|
|
|
- for_each_matching_node(np, sunxi_early_reset_dt_ids)
|
|
- sunxi_reset_init(np);
|
|
+ for_each_matching_node_and_match(np, sunxi_early_reset_dt_ids, &match) {
|
|
+ of_xlate = match->data;
|
|
+ sunxi_reset_init(np, of_xlate);
|
|
+ }
|
|
}
|
|
|
|
/*
|