linux-kernel - [PATCH 10/10] nvmem: sunxi-sid: add support for A64/H5's SID controller

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Message-Id: <1508838874-32252-11-git-send-email-srinivas.kandagatla@linaro.org>
Date:   Tue, 24 Oct 2017 10:54:34 +0100
From:   srinivas.kandagatla@...aro.org
To:     gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org, Icenowy Zheng <icenowy@...c.io>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH 10/10] nvmem: sunxi-sid: add support for A64/H5's SID controller

From: Icenowy Zheng <icenowy@...c.io>

Allwinner A64/H5 SoCs come with a SID controller like the one in H3, but
without the silicon bug that makes the initial value at 0x200 wrong, so
the value at 0x200 can be directly read.

Add support for this kind of SID controller.

Signed-off-by: Icenowy Zheng <icenowy@...c.io>
Acked-by: Rob Herring <robh@...nel.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt | 1 +
 drivers/nvmem/sunxi_sid.c                                       | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt b/Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt
index ef06d06..6ea0836 100644
--- a/Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt
+++ b/Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt
@@ -5,6 +5,7 @@ Required properties:
   "allwinner,sun4i-a10-sid"
   "allwinner,sun7i-a20-sid"
   "allwinner,sun8i-h3-sid"
+  "allwinner,sun50i-a64-sid"
 
 - reg: Should contain registers location and length
 
diff --git a/drivers/nvmem/sunxi_sid.c b/drivers/nvmem/sunxi_sid.c
index 0d6648b..3c9fd4f 100644
--- a/drivers/nvmem/sunxi_sid.c
+++ b/drivers/nvmem/sunxi_sid.c
@@ -199,10 +199,16 @@ static int sunxi_sid_remove(struct platform_device *pdev)
 	.need_register_readout = true,
 };
 
+static const struct sunxi_sid_cfg sun50i_a64_cfg = {
+	.value_offset = 0x200,
+	.size = 0x100,
+};
+
 static const struct of_device_id sunxi_sid_of_match[] = {
 	{ .compatible = "allwinner,sun4i-a10-sid", .data = &sun4i_a10_cfg },
 	{ .compatible = "allwinner,sun7i-a20-sid", .data = &sun7i_a20_cfg },
 	{ .compatible = "allwinner,sun8i-h3-sid", .data = &sun8i_h3_cfg },
+	{ .compatible = "allwinner,sun50i-a64-sid", .data = &sun50i_a64_cfg },
 	{/* sentinel */},
 };
 MODULE_DEVICE_TABLE(of, sunxi_sid_of_match);
-- 
1.9.1