1 // SPDX-License-Identifier: GPL-2.0-only
7  * Decoupler IP Core.
15 #include <linux/fpga/fpga-bridge.h>
29 	writel(val, d->io_base + offset);  in xlnx_pr_decoupler_write()
35 	return readl(d->io_base + offset);  in xlnx_pr_decouple_read()
41 	struct xlnx_pr_decoupler_data *priv = bridge->priv;  in xlnx_pr_decoupler_enable_set()
43 	err = clk_enable(priv->clk);  in xlnx_pr_decoupler_enable_set()
52 	clk_disable(priv->clk);  in xlnx_pr_decoupler_enable_set()
59 	const struct xlnx_pr_decoupler_data *priv = bridge->priv;  in xlnx_pr_decoupler_enable_show()
63 	err = clk_enable(priv->clk);  in xlnx_pr_decoupler_enable_show()
67 	status = readl(priv->io_base);  in xlnx_pr_decoupler_enable_show()
69 	clk_disable(priv->clk);  in xlnx_pr_decoupler_enable_show()
80 	{ .compatible = "xlnx,pr-decoupler-1.00", },
81 	{ .compatible = "xlnx,pr-decoupler", },
93 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);  in xlnx_pr_decoupler_probe()
95 		return -ENOMEM;  in xlnx_pr_decoupler_probe()
98 	priv->io_base = devm_ioremap_resource(&pdev->dev, res);  in xlnx_pr_decoupler_probe()
99 	if (IS_ERR(priv->io_base))  in xlnx_pr_decoupler_probe()
100 		return PTR_ERR(priv->io_base);  in xlnx_pr_decoupler_probe()
102 	priv->clk = devm_clk_get(&pdev->dev, "aclk");  in xlnx_pr_decoupler_probe()
103 	if (IS_ERR(priv->clk)) {  in xlnx_pr_decoupler_probe()
104 		if (PTR_ERR(priv->clk) != -EPROBE_DEFER)  in xlnx_pr_decoupler_probe()
105 			dev_err(&pdev->dev, "input clock not found\n");  in xlnx_pr_decoupler_probe()
106 		return PTR_ERR(priv->clk);  in xlnx_pr_decoupler_probe()
109 	err = clk_prepare_enable(priv->clk);  in xlnx_pr_decoupler_probe()
111 		dev_err(&pdev->dev, "unable to enable clock\n");  in xlnx_pr_decoupler_probe()
115 	clk_disable(priv->clk);  in xlnx_pr_decoupler_probe()
117 	br = devm_fpga_bridge_create(&pdev->dev, "Xilinx PR Decoupler",  in xlnx_pr_decoupler_probe()
120 		err = -ENOMEM;  in xlnx_pr_decoupler_probe()
128 		dev_err(&pdev->dev, "unable to register Xilinx PR Decoupler");  in xlnx_pr_decoupler_probe()
135 	clk_unprepare(priv->clk);  in xlnx_pr_decoupler_probe()
143 	struct xlnx_pr_decoupler_data *p = bridge->priv;  in xlnx_pr_decoupler_remove()
147 	clk_unprepare(p->clk);  in xlnx_pr_decoupler_remove()
163 MODULE_DESCRIPTION("Xilinx Partial Reconfiguration Decoupler");