diff options
Diffstat (limited to 'target/linux/sunxi/patches-4.9/131-reset-add-h3-resets.patch')
| -rw-r--r-- | target/linux/sunxi/patches-4.9/131-reset-add-h3-resets.patch | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/target/linux/sunxi/patches-4.9/131-reset-add-h3-resets.patch b/target/linux/sunxi/patches-4.9/131-reset-add-h3-resets.patch new file mode 100644 index 0000000000..dee01dc020 --- /dev/null +++ b/target/linux/sunxi/patches-4.9/131-reset-add-h3-resets.patch @@ -0,0 +1,92 @@ +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(-) + +--- 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 +--- a/drivers/reset/reset-sunxi.c ++++ b/drivers/reset/reset-sunxi.c +@@ -75,7 +75,9 @@ static const struct reset_control_ops su + .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 devic + data->rcdev.nr_resets = size * 32; + data->rcdev.ops = &sunxi_reset_ops; + data->rcdev.of_node = np; ++ data->rcdev.of_xlate = of_xlate; + + return reset_controller_register(&data->rcdev); + +@@ -116,6 +119,21 @@ err_alloc: + 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 +@@ -123,15 +141,21 @@ err_alloc: + */ + static const struct of_device_id sunxi_early_reset_dt_ids[] __initconst = { + { .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; +- +- for_each_matching_node(np, sunxi_early_reset_dt_ids) +- sunxi_reset_init(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_and_match(np, sunxi_early_reset_dt_ids, &match) { ++ of_xlate = match->data; ++ sunxi_reset_init(np, of_xlate); ++ } + } + + /* |