[PATCH v2 0/4] Introduce clock support for Airoha EN7581 SoC

[PATCH v2 0/4] Introduce clock support for Airoha EN7581 SoC

[Lorenzo Bianconi]

this series is based on the following series:
https://patchwork.kernel.org/project/linux-arm-kernel/cover/cover.1709975956.git.lorenzo@kernel.org/

Changes since v1:
- add .enable()/disable() callbacks to pcie ops
- introduce en_clk_soc_data data structure in order to define multiple clk_ops
  for each supported SoC
- rename clock node from system-controller to clock-controller
- add missing item descriptions in dt-binding

Lorenzo Bianconi (4):
  dt-bindings: clock: airoha: add EN7581 binding
  arm64: dts: airoha: Add EN7581 clock node
  clk: en7523: Add en_clk_soc_data data structure
  clk: en7523: Add EN7581 support

 .../bindings/clock/airoha,en7523-scu.yaml     |  31 ++-
 arch/arm64/boot/dts/airoha/en7581.dtsi        |   9 +
 drivers/clk/clk-en7523.c                      | 190 ++++++++++++++++--
 3 files changed, 211 insertions(+), 19 deletions(-)

-- 
2.44.0


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[PATCH v2 1/4] dt-bindings: clock: airoha: add EN7581 binding

[Lorenzo Bianconi]

Introduce Airoha EN7581 entry in Airoha EN7523 clock binding

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 .../bindings/clock/airoha,en7523-scu.yaml     | 31 +++++++++++++++++--
 1 file changed, 29 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/clock/airoha,en7523-scu.yaml b/Documentation/devicetree/bindings/clock/airoha,en7523-scu.yaml
index 79b0752faa91..3f4266637733 100644
--- a/Documentation/devicetree/bindings/clock/airoha,en7523-scu.yaml
+++ b/Documentation/devicetree/bindings/clock/airoha,en7523-scu.yaml
@@ -29,10 +29,13 @@ description: |
 properties:
   compatible:
     items:
-      - const: airoha,en7523-scu
+      - enum:
+          - airoha,en7523-scu
+          - airoha,en7581-scu
 
   reg:
-    maxItems: 2
+    minItems: 2
+    maxItems: 3
 
   "#clock-cells":
     description:
@@ -45,6 +48,30 @@ required:
   - reg
   - '#clock-cells'
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          const: airoha,en7523-scu
+    then:
+      properties:
+        reg:
+          items:
+            - description: scu base address
+            - description: misc scu base address
+
+  - if:
+      properties:
+        compatible:
+          const: airoha,en7581-scu
+    then:
+      properties:
+        reg:
+          items:
+            - description: scu base address
+            - description: misc scu base address
+            - description: pb scu base address
+
 additionalProperties: false
 
 examples:
-- 
2.44.0


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[PATCH v2 2/4] arm64: dts: airoha: Add EN7581 clock node

[Lorenzo Bianconi]

Introduce the Airoha EN7581 clock node in Airoha EN7581 dtsi

Tested-by: Zhengping Zhang <zhengping.zhang@airoha.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 arch/arm64/boot/dts/airoha/en7581.dtsi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm64/boot/dts/airoha/en7581.dtsi b/arch/arm64/boot/dts/airoha/en7581.dtsi
index 55eb1762fb11..5c4bfe3e1e5a 100644
--- a/arch/arm64/boot/dts/airoha/en7581.dtsi
+++ b/arch/arm64/boot/dts/airoha/en7581.dtsi
@@ -2,6 +2,7 @@
 
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/clock/en7523-clk.h>
 
 / {
 	interrupt-parent = <&gic>;
@@ -150,5 +151,13 @@ uart1: serial@1fbf0000 {
 			interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>;
 			clock-frequency = <1843200>;
 		};
+
+		scuclk: clock-controller@1fa20000 {
+			compatible = "airoha,en7581-scu";
+			reg = <0x0 0x1fa20000 0x0 0x400>,
+			      <0x0 0x1fb00000 0x0 0x1000>,
+			      <0x0 0x1fbe3400 0x0 0xfc>;
+			#clock-cells = <1>;
+		};
 	};
 };
-- 
2.44.0


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[PATCH v2 3/4] clk: en7523: Add en_clk_soc_data data structure

[Lorenzo Bianconi]

Introduce en_clk_soc_data data structure in order to define multiple
clk_ops for each supported SoC. This is a preliminary patch to
introduce EN7581 clock support.

Tested-by: Zhengping Zhang <zhengping.zhang@airoha.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 drivers/clk/clk-en7523.c | 32 ++++++++++++++++++++------------
 1 file changed, 20 insertions(+), 12 deletions(-)

diff --git a/drivers/clk/clk-en7523.c b/drivers/clk/clk-en7523.c
index 7cde328495e2..7eee921ab575 100644
--- a/drivers/clk/clk-en7523.c
+++ b/drivers/clk/clk-en7523.c
@@ -47,6 +47,10 @@ struct en_clk_gate {
 	struct clk_hw hw;
 };
 
+struct en_clk_soc_data {
+	const struct clk_ops pcie_ops;
+};
+
 static const u32 gsw_base[] = { 400000000, 500000000 };
 static const u32 emi_base[] = { 333000000, 400000000 };
 static const u32 bus_base[] = { 500000000, 540000000 };
@@ -145,11 +149,6 @@ static const struct en_clk_desc en7523_base_clks[] = {
 	}
 };
 
-static const struct of_device_id of_match_clk_en7523[] = {
-	{ .compatible = "airoha,en7523-scu", },
-	{ /* sentinel */ }
-};
-
 static unsigned int en7523_get_base_rate(void __iomem *base, unsigned int i)
 {
 	const struct en_clk_desc *desc = &en7523_base_clks[i];
@@ -247,14 +246,10 @@ static void en7523_pci_unprepare(struct clk_hw *hw)
 static struct clk_hw *en7523_register_pcie_clk(struct device *dev,
 					       void __iomem *np_base)
 {
-	static const struct clk_ops pcie_gate_ops = {
-		.is_enabled = en7523_pci_is_enabled,
-		.prepare = en7523_pci_prepare,
-		.unprepare = en7523_pci_unprepare,
-	};
+	const struct en_clk_soc_data *soc_data = of_device_get_match_data(dev);
 	struct clk_init_data init = {
 		.name = "pcie",
-		.ops = &pcie_gate_ops,
+		.ops = &soc_data->pcie_ops,
 	};
 	struct en_clk_gate *cg;
 
@@ -264,7 +259,7 @@ static struct clk_hw *en7523_register_pcie_clk(struct device *dev,
 
 	cg->base = np_base;
 	cg->hw.init = &init;
-	en7523_pci_unprepare(&cg->hw);
+	init.ops->unprepare(&cg->hw);
 
 	if (clk_hw_register(dev, &cg->hw))
 		return NULL;
@@ -333,6 +328,19 @@ static int en7523_clk_probe(struct platform_device *pdev)
 	return r;
 }
 
+static const struct en_clk_soc_data en7523_data = {
+	.pcie_ops = {
+		.is_enabled = en7523_pci_is_enabled,
+		.prepare = en7523_pci_prepare,
+		.unprepare = en7523_pci_unprepare,
+	},
+};
+
+static const struct of_device_id of_match_clk_en7523[] = {
+	{ .compatible = "airoha,en7523-scu", .data = &en7523_data },
+	{ /* sentinel */ }
+};
+
 static struct platform_driver clk_en7523_drv = {
 	.probe = en7523_clk_probe,
 	.driver = {
-- 
2.44.0


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[PATCH v2 4/4] clk: en7523: Add EN7581 support

[Lorenzo Bianconi]

Introduce EN7581 clock support to clk-en7523 driver.
Add hw_init callback to en_clk_soc_data data structure.

Tested-by: Zhengping Zhang <zhengping.zhang@airoha.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 drivers/clk/clk-en7523.c | 158 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 153 insertions(+), 5 deletions(-)

diff --git a/drivers/clk/clk-en7523.c b/drivers/clk/clk-en7523.c
index 7eee921ab575..381605be333f 100644
--- a/drivers/clk/clk-en7523.c
+++ b/drivers/clk/clk-en7523.c
@@ -4,13 +4,16 @@
 #include <linux/clk-provider.h>
 #include <linux/io.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <dt-bindings/clock/en7523-clk.h>
 
 #define REG_PCI_CONTROL			0x88
 #define   REG_PCI_CONTROL_PERSTOUT	BIT(29)
 #define   REG_PCI_CONTROL_PERSTOUT1	BIT(26)
+#define   REG_PCI_CONTROL_REFCLK_EN0	BIT(23)
 #define   REG_PCI_CONTROL_REFCLK_EN1	BIT(22)
+#define   REG_PCI_CONTROL_PERSTOUT2	BIT(16)
 #define REG_GSW_CLK_DIV_SEL		0x1b4
 #define REG_EMI_CLK_DIV_SEL		0x1b8
 #define REG_BUS_CLK_DIV_SEL		0x1bc
@@ -18,10 +21,25 @@
 #define REG_SPI_CLK_FREQ_SEL		0x1c8
 #define REG_NPU_CLK_DIV_SEL		0x1fc
 #define REG_CRYPTO_CLKSRC		0x200
-#define REG_RESET_CONTROL		0x834
+#define REG_RESET_CONTROL2		0x830
+#define   REG_RESET2_CONTROL_PCIE2	BIT(27)
+#define REG_RESET_CONTROL1		0x834
 #define   REG_RESET_CONTROL_PCIEHB	BIT(29)
 #define   REG_RESET_CONTROL_PCIE1	BIT(27)
 #define   REG_RESET_CONTROL_PCIE2	BIT(26)
+/* EN7581 */
+#define REG_PCIE0_MEM			0x00
+#define REG_PCIE0_MEM_MASK		0x04
+#define REG_PCIE1_MEM			0x08
+#define REG_PCIE1_MEM_MASK		0x0c
+#define REG_PCIE2_MEM			0x10
+#define REG_PCIE2_MEM_MASK		0x14
+#define REG_PCIE_RESET_OPEN_DRAIN	0x018c
+#define REG_PCIE_RESET_OPEN_DRAIN_MASK	GENMASK(2, 0)
+#define REG_NP_SCU_PCIC			0x88
+#define REG_NP_SCU_SSTR			0x9c
+#define REG_PCIE_XSI0_SEL_MASK		GENMASK(14, 13)
+#define REG_PCIE_XSI1_SEL_MASK		GENMASK(12, 11)
 
 struct en_clk_desc {
 	int id;
@@ -49,6 +67,8 @@ struct en_clk_gate {
 
 struct en_clk_soc_data {
 	const struct clk_ops pcie_ops;
+	int (*hw_init)(struct platform_device *pdev, void __iomem *base,
+		       void __iomem *np_base);
 };
 
 static const u32 gsw_base[] = { 400000000, 500000000 };
@@ -211,14 +231,14 @@ static int en7523_pci_prepare(struct clk_hw *hw)
 	usleep_range(1000, 2000);
 
 	/* Reset to default */
-	val = readl(np_base + REG_RESET_CONTROL);
+	val = readl(np_base + REG_RESET_CONTROL1);
 	mask = REG_RESET_CONTROL_PCIE1 | REG_RESET_CONTROL_PCIE2 |
 	       REG_RESET_CONTROL_PCIEHB;
-	writel(val & ~mask, np_base + REG_RESET_CONTROL);
+	writel(val & ~mask, np_base + REG_RESET_CONTROL1);
 	usleep_range(1000, 2000);
-	writel(val | mask, np_base + REG_RESET_CONTROL);
+	writel(val | mask, np_base + REG_RESET_CONTROL1);
 	msleep(100);
-	writel(val & ~mask, np_base + REG_RESET_CONTROL);
+	writel(val & ~mask, np_base + REG_RESET_CONTROL1);
 	usleep_range(5000, 10000);
 
 	/* Release device */
@@ -259,6 +279,9 @@ static struct clk_hw *en7523_register_pcie_clk(struct device *dev,
 
 	cg->base = np_base;
 	cg->hw.init = &init;
+
+	if (init.ops->disable)
+		init.ops->disable(&cg->hw);
 	init.ops->unprepare(&cg->hw);
 
 	if (clk_hw_register(dev, &cg->hw))
@@ -267,6 +290,111 @@ static struct clk_hw *en7523_register_pcie_clk(struct device *dev,
 	return &cg->hw;
 }
 
+static int en7581_pci_is_enabled(struct clk_hw *hw)
+{
+	struct en_clk_gate *cg = container_of(hw, struct en_clk_gate, hw);
+	u32 val, mask;
+
+	mask = REG_PCI_CONTROL_REFCLK_EN0 | REG_PCI_CONTROL_REFCLK_EN1;
+	val = readl(cg->base + REG_PCI_CONTROL);
+	return (val & mask) == mask;
+}
+
+static int en7581_pci_prepare(struct clk_hw *hw)
+{
+	struct en_clk_gate *cg = container_of(hw, struct en_clk_gate, hw);
+	void __iomem *np_base = cg->base;
+	u32 val, mask;
+
+	mask = REG_RESET_CONTROL_PCIE1 | REG_RESET_CONTROL_PCIE2 |
+	       REG_RESET_CONTROL_PCIEHB;
+	val = readl(np_base + REG_RESET_CONTROL1);
+	writel(val & ~mask, np_base + REG_RESET_CONTROL1);
+	val = readl(np_base + REG_RESET_CONTROL2);
+	writel(val & ~REG_RESET2_CONTROL_PCIE2, np_base + REG_RESET_CONTROL2);
+	usleep_range(5000, 10000);
+
+	return 0;
+}
+
+static int en7581_pci_enable(struct clk_hw *hw)
+{
+	struct en_clk_gate *cg = container_of(hw, struct en_clk_gate, hw);
+	void __iomem *np_base = cg->base;
+	u32 val, mask;
+
+	mask = REG_PCI_CONTROL_REFCLK_EN0 | REG_PCI_CONTROL_REFCLK_EN1 |
+	       REG_PCI_CONTROL_PERSTOUT1 | REG_PCI_CONTROL_PERSTOUT2 |
+	       REG_PCI_CONTROL_PERSTOUT;
+	val = readl(np_base + REG_PCI_CONTROL);
+	writel(val | mask, np_base + REG_PCI_CONTROL);
+	msleep(250);
+
+	return 0;
+}
+
+static void en7581_pci_unprepare(struct clk_hw *hw)
+{
+	struct en_clk_gate *cg = container_of(hw, struct en_clk_gate, hw);
+	void __iomem *np_base = cg->base;
+	u32 val, mask;
+
+	mask = REG_RESET_CONTROL_PCIE1 | REG_RESET_CONTROL_PCIE2 |
+	       REG_RESET_CONTROL_PCIEHB;
+	val = readl(np_base + REG_RESET_CONTROL1);
+	writel(val | mask, np_base + REG_RESET_CONTROL1);
+	mask = REG_RESET_CONTROL_PCIE1 | REG_RESET_CONTROL_PCIE2;
+	writel(val | mask, np_base + REG_RESET_CONTROL1);
+	val = readl(np_base + REG_RESET_CONTROL2);
+	writel(val | REG_RESET_CONTROL_PCIE2, np_base + REG_RESET_CONTROL2);
+	msleep(100);
+}
+
+static void en7581_pci_disable(struct clk_hw *hw)
+{
+	struct en_clk_gate *cg = container_of(hw, struct en_clk_gate, hw);
+	void __iomem *np_base = cg->base;
+	u32 val, mask;
+
+	mask = REG_PCI_CONTROL_REFCLK_EN0 | REG_PCI_CONTROL_REFCLK_EN1 |
+	       REG_PCI_CONTROL_PERSTOUT1 | REG_PCI_CONTROL_PERSTOUT2 |
+	       REG_PCI_CONTROL_PERSTOUT;
+	val = readl(np_base + REG_PCI_CONTROL);
+	writel(val & ~mask, np_base + REG_PCI_CONTROL);
+	usleep_range(1000, 2000);
+}
+
+static int en7581_clk_hw_init(struct platform_device *pdev,
+			      void __iomem *base,
+			      void __iomem *np_base)
+{
+	void __iomem *pb_base;
+	u32 val;
+
+	pb_base = devm_platform_ioremap_resource(pdev, 2);
+	if (IS_ERR(pb_base))
+		return PTR_ERR(pb_base);
+
+	val = readl(np_base + REG_NP_SCU_SSTR);
+	val &= ~(REG_PCIE_XSI0_SEL_MASK | REG_PCIE_XSI1_SEL_MASK);
+	writel(val, np_base + REG_NP_SCU_SSTR);
+	val = readl(np_base + REG_NP_SCU_PCIC);
+	writel(val | 3, np_base + REG_NP_SCU_PCIC);
+
+	writel(0x20000000, pb_base + REG_PCIE0_MEM);
+	writel(0xfc000000, pb_base + REG_PCIE0_MEM_MASK);
+	writel(0x24000000, pb_base + REG_PCIE1_MEM);
+	writel(0xfc000000, pb_base + REG_PCIE1_MEM_MASK);
+	writel(0x28000000, pb_base + REG_PCIE2_MEM);
+	writel(0xfc000000, pb_base + REG_PCIE2_MEM_MASK);
+
+	val = readl(base + REG_PCIE_RESET_OPEN_DRAIN);
+	writel(val | REG_PCIE_RESET_OPEN_DRAIN_MASK,
+	       base + REG_PCIE_RESET_OPEN_DRAIN);
+
+	return 0;
+}
+
 static void en7523_register_clocks(struct device *dev, struct clk_hw_onecell_data *clk_data,
 				   void __iomem *base, void __iomem *np_base)
 {
@@ -299,6 +427,7 @@ static void en7523_register_clocks(struct device *dev, struct clk_hw_onecell_dat
 static int en7523_clk_probe(struct platform_device *pdev)
 {
 	struct device_node *node = pdev->dev.of_node;
+	const struct en_clk_soc_data *soc_data;
 	struct clk_hw_onecell_data *clk_data;
 	void __iomem *base, *np_base;
 	int r;
@@ -311,6 +440,13 @@ static int en7523_clk_probe(struct platform_device *pdev)
 	if (IS_ERR(np_base))
 		return PTR_ERR(np_base);
 
+	soc_data = of_device_get_match_data(&pdev->dev);
+	if (soc_data->hw_init) {
+		r = soc_data->hw_init(pdev, base, np_base);
+		if (r)
+			return r;
+	}
+
 	clk_data = devm_kzalloc(&pdev->dev,
 				struct_size(clk_data, hws, EN7523_NUM_CLOCKS),
 				GFP_KERNEL);
@@ -336,8 +472,20 @@ static const struct en_clk_soc_data en7523_data = {
 	},
 };
 
+static const struct en_clk_soc_data en7581_data = {
+	.pcie_ops = {
+		.is_enabled = en7581_pci_is_enabled,
+		.prepare = en7581_pci_prepare,
+		.enable = en7581_pci_enable,
+		.unprepare = en7581_pci_unprepare,
+		.disable = en7581_pci_disable,
+	},
+	.hw_init = en7581_clk_hw_init,
+};
+
 static const struct of_device_id of_match_clk_en7523[] = {
 	{ .compatible = "airoha,en7523-scu", .data = &en7523_data },
+	{ .compatible = "airoha,en7581-scu", .data = &en7581_data },
 	{ /* sentinel */ }
 };
 
-- 
2.44.0


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Re: [PATCH v2 1/4] dt-bindings: clock: airoha: add EN7581 binding

[Krzysztof Kozlowski]

On 06/04/2024 12:43, Lorenzo Bianconi wrote:
> Introduce Airoha EN7581 entry in Airoha EN7523 clock binding
> 
> Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
> ---
>  .../bindings/clock/airoha,en7523-scu.yaml     | 31 +++++++++++++++++--
>  1 file changed, 29 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/clock/airoha,en7523-scu.yaml b/Documentation/devicetree/bindings/clock/airoha,en7523-scu.yaml
> index 79b0752faa91..3f4266637733 100644
> --- a/Documentation/devicetree/bindings/clock/airoha,en7523-scu.yaml
> +++ b/Documentation/devicetree/bindings/clock/airoha,en7523-scu.yaml
> @@ -29,10 +29,13 @@ description: |
>  properties:
>    compatible:
>      items:
> -      - const: airoha,en7523-scu
> +      - enum:
> +          - airoha,en7523-scu
> +          - airoha,en7581-scu
>  
>    reg:
> -    maxItems: 2
> +    minItems: 2
> +    maxItems: 3


Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>

Best regards,
Krzysztof


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Re: [PATCH v2 1/4] dt-bindings: clock: airoha: add EN7581 binding

[Stephen Boyd]

Quoting Lorenzo Bianconi (2024-04-06 03:43:41)
> Introduce Airoha EN7581 entry in Airoha EN7523 clock binding
> 
> Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
> ---

Applied to clk-next

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Re: [PATCH v2 3/4] clk: en7523: Add en_clk_soc_data data structure

[Stephen Boyd]

Quoting Lorenzo Bianconi (2024-04-06 03:43:43)
> Introduce en_clk_soc_data data structure in order to define multiple
> clk_ops for each supported SoC. This is a preliminary patch to
> introduce EN7581 clock support.
> 
> Tested-by: Zhengping Zhang <zhengping.zhang@airoha.com>
> Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
> ---

Applied to clk-next

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Re: [PATCH v2 4/4] clk: en7523: Add EN7581 support

[Stephen Boyd]

Quoting Lorenzo Bianconi (2024-04-06 03:43:44)
> Introduce EN7581 clock support to clk-en7523 driver.
> Add hw_init callback to en_clk_soc_data data structure.
> 
> Tested-by: Zhengping Zhang <zhengping.zhang@airoha.com>
> Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
> ---

Applied to clk-next

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Re: (subset) [PATCH v2 0/4] Introduce clock support for Airoha EN7581 SoC

[AngeloGioacchino Del Regno]

On Sat, 06 Apr 2024 12:43:40 +0200, Lorenzo Bianconi wrote:
> this series is based on the following series:
> https://patchwork.kernel.org/project/linux-arm-kernel/cover/cover.1709975956.git.lorenzo@kernel.org/
> 
> Changes since v1:
> - add .enable()/disable() callbacks to pcie ops
> - introduce en_clk_soc_data data structure in order to define multiple clk_ops
>   for each supported SoC
> - rename clock node from system-controller to clock-controller
> - add missing item descriptions in dt-binding
> 
> [...]

Applied to v6.9-next/dts64, thanks!

[2/4] arm64: dts: airoha: Add EN7581 clock node
      commit: 1dd2e7b97c3c8554f3339397ef6656d90af3ae1d

Cheers,
Angelo



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