Commit 552f388b authored by Sai Krishna Potthuri's avatar Sai Krishna Potthuri Committed by Philipp Zabel
Browse files

reset: reset-zynqmp: Added support for Versal platform 



Updated the reset driver to support Versal platform.
As part of adding Versal support
- Added Versal specific compatible string.
- Reset Id and number of resets are different for Versal and ZynqMP,
hence taken care of these two based on compatible string.

Signed-off-by: default avatarSai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xilinx.com>
Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
parent a297104a

drivers/reset/reset-zynqmp.c

+44 −6
Original line number Diff line number Diff line
@@ -9,12 +9,20 @@ 
#include <linux/platform_device.h>

#include <linux/reset-controller.h>

#include <linux/firmware/xlnx-zynqmp.h>

#include <linux/of_device.h>



#define ZYNQMP_NR_RESETS (ZYNQMP_PM_RESET_END - ZYNQMP_PM_RESET_START)

#define ZYNQMP_RESET_ID ZYNQMP_PM_RESET_START

#define VERSAL_NR_RESETS	95



struct zynqmp_reset_soc_data {

	u32 reset_id;

	u32 num_resets;

};



struct zynqmp_reset_data {

	struct reset_controller_dev rcdev;

	const struct zynqmp_reset_soc_data *data;

};



static inline struct zynqmp_reset_data *
@@ -26,23 +34,28 @@ to_zynqmp_reset_data(struct reset_controller_dev *rcdev) 
static int zynqmp_reset_assert(struct reset_controller_dev *rcdev,

			       unsigned long id)

{

	return zynqmp_pm_reset_assert(ZYNQMP_RESET_ID + id,

	struct zynqmp_reset_data *priv = to_zynqmp_reset_data(rcdev);



	return zynqmp_pm_reset_assert(priv->data->reset_id + id,

				      PM_RESET_ACTION_ASSERT);

}



static int zynqmp_reset_deassert(struct reset_controller_dev *rcdev,

				 unsigned long id)

{

	return zynqmp_pm_reset_assert(ZYNQMP_RESET_ID + id,

	struct zynqmp_reset_data *priv = to_zynqmp_reset_data(rcdev);



	return zynqmp_pm_reset_assert(priv->data->reset_id + id,

				      PM_RESET_ACTION_RELEASE);

}



static int zynqmp_reset_status(struct reset_controller_dev *rcdev,

			       unsigned long id)

{

	struct zynqmp_reset_data *priv = to_zynqmp_reset_data(rcdev);

	int val, err;



	err = zynqmp_pm_reset_get_status(ZYNQMP_RESET_ID + id, &val);

	err = zynqmp_pm_reset_get_status(priv->data->reset_id + id, &val);

	if (err)

		return err;
@@ -52,10 +65,28 @@ static int zynqmp_reset_status(struct reset_controller_dev *rcdev, 
static int zynqmp_reset_reset(struct reset_controller_dev *rcdev,

			      unsigned long id)

{

	return zynqmp_pm_reset_assert(ZYNQMP_RESET_ID + id,

	struct zynqmp_reset_data *priv = to_zynqmp_reset_data(rcdev);



	return zynqmp_pm_reset_assert(priv->data->reset_id + id,

				      PM_RESET_ACTION_PULSE);

}



static int zynqmp_reset_of_xlate(struct reset_controller_dev *rcdev,

				 const struct of_phandle_args *reset_spec)

{

	return reset_spec->args[0];

}



static const struct zynqmp_reset_soc_data zynqmp_reset_data = {

	.reset_id = ZYNQMP_RESET_ID,

	.num_resets = ZYNQMP_NR_RESETS,

};



static const struct zynqmp_reset_soc_data versal_reset_data = {

        .reset_id = 0,

        .num_resets = VERSAL_NR_RESETS,

};



static const struct reset_control_ops zynqmp_reset_ops = {

	.reset = zynqmp_reset_reset,

	.assert = zynqmp_reset_assert,
@@ -71,18 +102,25 @@ static int zynqmp_reset_probe(struct platform_device *pdev) 
	if (!priv)

		return -ENOMEM;



	priv->data = of_device_get_match_data(&pdev->dev);

	if (!priv->data)

		return -EINVAL;



	platform_set_drvdata(pdev, priv);



	priv->rcdev.ops = &zynqmp_reset_ops;

	priv->rcdev.owner = THIS_MODULE;

	priv->rcdev.of_node = pdev->dev.of_node;

	priv->rcdev.nr_resets = ZYNQMP_NR_RESETS;

	priv->rcdev.nr_resets = priv->data->num_resets;

	priv->rcdev.of_reset_n_cells = 1;

	priv->rcdev.of_xlate = zynqmp_reset_of_xlate;



	return devm_reset_controller_register(&pdev->dev, &priv->rcdev);

}



static const struct of_device_id zynqmp_reset_dt_ids[] = {

	{ .compatible = "xlnx,zynqmp-reset", },

	{ .compatible = "xlnx,zynqmp-reset", .data = &zynqmp_reset_data, },

	{ .compatible = "xlnx,versal-reset", .data = &versal_reset_data, },

	{ /* sentinel */ },

};

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