* [PATCH v2 1/2] dt-bindings: reset: Add lan966x support
2021-10-12 11:42 [PATCH v2 0/2] Extend Sparx5 switch reset driver for lan966x Horatiu Vultur
@ 2021-10-12 11:42 ` Horatiu Vultur
2021-10-12 13:35 ` Philipp Zabel
2021-10-12 11:42 ` [PATCH v2 2/2] reset: mchp: sparx5: Extend support for lan966x Horatiu Vultur
1 sibling, 1 reply; 5+ messages in thread
From: Horatiu Vultur @ 2021-10-12 11:42 UTC (permalink / raw)
To: p.zabel, robh+dt, andrew, lars.povlsen, Steen.Hegelund,
UNGLinuxDriver, devicetree, linux-kernel, linux-arm-kernel
Cc: Horatiu Vultur
This adds support for lan966x.
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
---
.../devicetree/bindings/reset/microchip,rst.yaml | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/reset/microchip,rst.yaml b/Documentation/devicetree/bindings/reset/microchip,rst.yaml
index 370579aeeca1..622cf3d0455d 100644
--- a/Documentation/devicetree/bindings/reset/microchip,rst.yaml
+++ b/Documentation/devicetree/bindings/reset/microchip,rst.yaml
@@ -20,7 +20,11 @@ properties:
pattern: "^reset-controller@[0-9a-f]+$"
compatible:
- const: microchip,sparx5-switch-reset
+ oneOf:
+ - items:
+ - const: microchip,sparx5-switch-reset
+ - items:
+ - const: microchip,lan966x-switch-reset
reg:
items:
@@ -37,6 +41,14 @@ properties:
$ref: "/schemas/types.yaml#/definitions/phandle"
description: syscon used to access CPU reset
+ cuphy-syscon:
+ $ref: "/schemas/types.yaml#/definitions/phandle"
+ description: syscon used to access CuPHY
+
+ gpios:
+ description: used for release of reset of the external PHY
+ maxItems: 1
+
required:
- compatible
- reg
--
2.33.0
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^ permalink raw reply related [flat|nested] 5+ messages in thread* [PATCH v2 2/2] reset: mchp: sparx5: Extend support for lan966x
2021-10-12 11:42 [PATCH v2 0/2] Extend Sparx5 switch reset driver for lan966x Horatiu Vultur
2021-10-12 11:42 ` [PATCH v2 1/2] dt-bindings: reset: Add lan966x support Horatiu Vultur
@ 2021-10-12 11:42 ` Horatiu Vultur
1 sibling, 0 replies; 5+ messages in thread
From: Horatiu Vultur @ 2021-10-12 11:42 UTC (permalink / raw)
To: p.zabel, robh+dt, andrew, lars.povlsen, Steen.Hegelund,
UNGLinuxDriver, devicetree, linux-kernel, linux-arm-kernel
Cc: Horatiu Vultur
This patch extends sparx5 driver to support also the lan966x. The
process to reset the switch is the same only it has different offsets.
Therefore make the driver more generic and add support for lan966x.
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
---
drivers/reset/Kconfig | 2 +-
drivers/reset/reset-microchip-sparx5.c | 80 +++++++++++++++++++++++---
2 files changed, 73 insertions(+), 9 deletions(-)
diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index be799a5abf8a..36ce6c8bcf1e 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -116,7 +116,7 @@ config RESET_LPC18XX
config RESET_MCHP_SPARX5
bool "Microchip Sparx5 reset driver"
- depends on ARCH_SPARX5 || COMPILE_TEST
+ depends on ARCH_SPARX5 || SOC_LAN966 || COMPILE_TEST
default y if SPARX5_SWITCH
select MFD_SYSCON
help
diff --git a/drivers/reset/reset-microchip-sparx5.c b/drivers/reset/reset-microchip-sparx5.c
index f01e7db8e83b..6594ab5c15fe 100644
--- a/drivers/reset/reset-microchip-sparx5.c
+++ b/drivers/reset/reset-microchip-sparx5.c
@@ -6,6 +6,7 @@
* The Sparx5 Chip Register Model can be browsed at this location:
* https://github.com/microchip-ung/sparx-5_reginfo
*/
+#include <linux/gpio/consumer.h>
#include <linux/mfd/syscon.h>
#include <linux/of_device.h>
#include <linux/module.h>
@@ -13,15 +14,22 @@
#include <linux/regmap.h>
#include <linux/reset-controller.h>
-#define PROTECT_REG 0x84
-#define PROTECT_BIT BIT(10)
-#define SOFT_RESET_REG 0x00
-#define SOFT_RESET_BIT BIT(1)
+struct reset_props {
+ u32 protect_reg;
+ u32 protect_bit;
+ u32 reset_reg;
+ u32 reset_bit;
+ u32 cuphy_reg;
+ u32 cuphy_bit;
+};
struct mchp_reset_context {
struct regmap *cpu_ctrl;
struct regmap *gcb_ctrl;
+ struct regmap *cuphy_ctrl;
struct reset_controller_dev rcdev;
+ const struct reset_props *props;
+ struct gpio_desc *reset_gpio;
};
static struct regmap_config sparx5_reset_regmap_config = {
@@ -36,17 +44,39 @@ static int sparx5_switch_reset(struct reset_controller_dev *rcdev,
struct mchp_reset_context *ctx =
container_of(rcdev, struct mchp_reset_context, rcdev);
u32 val;
+ int err;
/* Make sure the core is PROTECTED from reset */
- regmap_update_bits(ctx->cpu_ctrl, PROTECT_REG, PROTECT_BIT, PROTECT_BIT);
+ regmap_update_bits(ctx->cpu_ctrl, ctx->props->protect_reg,
+ ctx->props->protect_bit, ctx->props->protect_bit);
/* Start soft reset */
- regmap_write(ctx->gcb_ctrl, SOFT_RESET_REG, SOFT_RESET_BIT);
+ regmap_write(ctx->gcb_ctrl, ctx->props->reset_reg,
+ ctx->props->reset_bit);
/* Wait for soft reset done */
- return regmap_read_poll_timeout(ctx->gcb_ctrl, SOFT_RESET_REG, val,
- (val & SOFT_RESET_BIT) == 0,
+ err = regmap_read_poll_timeout(ctx->gcb_ctrl, ctx->props->reset_reg, val,
+ (val & ctx->props->reset_bit) == 0,
1, 100);
+ if (err)
+ return err;
+
+ if (!ctx->cuphy_ctrl)
+ return 0;
+
+ /* In case there are external PHYs toggle the GPIO to release the reset
+ * of the PHYs
+ */
+ if (ctx->reset_gpio) {
+ gpiod_direction_output(ctx->reset_gpio, 1);
+ gpiod_set_value(ctx->reset_gpio, 0);
+ gpiod_set_value(ctx->reset_gpio, 1);
+ gpiod_set_value(ctx->reset_gpio, 0);
+ }
+
+ /* Release the reset of internal PHY */
+ return regmap_update_bits(ctx->cuphy_ctrl, ctx->props->cuphy_reg,
+ ctx->props->cuphy_bit, ctx->props->cuphy_bit);
}
static const struct reset_control_ops sparx5_reset_ops = {
@@ -111,17 +141,51 @@ static int mchp_sparx5_reset_probe(struct platform_device *pdev)
if (err)
return err;
+ /* This resource is required on lan966x, to take the internal PHYs out
+ * of reset
+ */
+ err = mchp_sparx5_map_syscon(pdev, "cuphy-syscon", &ctx->cuphy_ctrl);
+ if (err && err != -ENODEV)
+ return err;
+
ctx->rcdev.owner = THIS_MODULE;
ctx->rcdev.nr_resets = 1;
ctx->rcdev.ops = &sparx5_reset_ops;
ctx->rcdev.of_node = dn;
+ ctx->props = device_get_match_data(&pdev->dev);
+
+ ctx->reset_gpio = devm_gpiod_get_optional(&pdev->dev, NULL, GPIOD_OUT_LOW);
+ if (IS_ERR(ctx->reset_gpio)) {
+ dev_err(&pdev->dev, "Could not get reset GPIO\n");
+ return PTR_ERR(ctx->reset_gpio);
+ }
return devm_reset_controller_register(&pdev->dev, &ctx->rcdev);
}
+static const struct reset_props reset_props_sparx5 = {
+ .protect_reg = 0x84,
+ .protect_bit = BIT(10),
+ .reset_reg = 0x0,
+ .reset_bit = BIT(1),
+};
+
+static const struct reset_props reset_props_lan966x = {
+ .protect_reg = 0x88,
+ .protect_bit = BIT(5),
+ .reset_reg = 0x0,
+ .reset_bit = BIT(1),
+ .cuphy_reg = 0x10,
+ .cuphy_bit = BIT(0),
+};
+
static const struct of_device_id mchp_sparx5_reset_of_match[] = {
{
.compatible = "microchip,sparx5-switch-reset",
+ .data = &reset_props_sparx5,
+ }, {
+ .compatible = "microchip,lan966x-switch-reset",
+ .data = &reset_props_lan966x,
},
{ }
};
--
2.33.0
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^ permalink raw reply related [flat|nested] 5+ messages in thread