1 // SPDX-License-Identifier: GPL-2.0-only
7  * Decoupler IP Core.
15 #include <linux/fpga/fpga-bridge.h>
34 	writel(val, d->io_base + offset);  in xlnx_pr_decoupler_write()
40 	return readl(d->io_base + offset);  in xlnx_pr_decouple_read()
46 	struct xlnx_pr_decoupler_data *priv = bridge->priv;  in xlnx_pr_decoupler_enable_set()
48 	err = clk_enable(priv->clk);  in xlnx_pr_decoupler_enable_set()
57 	clk_disable(priv->clk);  in xlnx_pr_decoupler_enable_set()
64 	const struct xlnx_pr_decoupler_data *priv = bridge->priv;  in xlnx_pr_decoupler_enable_show()
68 	err = clk_enable(priv->clk);  in xlnx_pr_decoupler_enable_show()
74 	clk_disable(priv->clk);  in xlnx_pr_decoupler_enable_show()
86 	.name = "Xilinx PR Decoupler",
94 	{ .compatible = "xlnx,pr-decoupler-1.00", .data = &decoupler_config },
95 	{ .compatible = "xlnx,pr-decoupler", .data = &decoupler_config },
96 	{ .compatible = "xlnx,dfx-axi-shutdown-manager-1.00",
98 	{ .compatible = "xlnx,dfx-axi-shutdown-manager",
107 	struct device_node *np = pdev->dev.of_node;  in xlnx_pr_decoupler_probe()
112 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);  in xlnx_pr_decoupler_probe()
114 		return -ENOMEM;  in xlnx_pr_decoupler_probe()
120 		if (match && match->data)  in xlnx_pr_decoupler_probe()
121 			priv->ipconfig = match->data;  in xlnx_pr_decoupler_probe()
124 	priv->io_base = devm_platform_ioremap_resource(pdev, 0);  in xlnx_pr_decoupler_probe()
125 	if (IS_ERR(priv->io_base))  in xlnx_pr_decoupler_probe()
126 		return PTR_ERR(priv->io_base);  in xlnx_pr_decoupler_probe()
128 	priv->clk = devm_clk_get(&pdev->dev, "aclk");  in xlnx_pr_decoupler_probe()
129 	if (IS_ERR(priv->clk))  in xlnx_pr_decoupler_probe()
130 		return dev_err_probe(&pdev->dev, PTR_ERR(priv->clk),  in xlnx_pr_decoupler_probe()
133 	err = clk_prepare_enable(priv->clk);  in xlnx_pr_decoupler_probe()
135 		dev_err(&pdev->dev, "unable to enable clock\n");  in xlnx_pr_decoupler_probe()
139 	clk_disable(priv->clk);  in xlnx_pr_decoupler_probe()
141 	br = fpga_bridge_register(&pdev->dev, priv->ipconfig->name,  in xlnx_pr_decoupler_probe()
145 		dev_err(&pdev->dev, "unable to register %s",  in xlnx_pr_decoupler_probe()
146 			priv->ipconfig->name);  in xlnx_pr_decoupler_probe()
155 	clk_unprepare(priv->clk);  in xlnx_pr_decoupler_probe()
163 	struct xlnx_pr_decoupler_data *p = bridge->priv;  in xlnx_pr_decoupler_remove()
167 	clk_unprepare(p->clk);  in xlnx_pr_decoupler_remove()
183 MODULE_DESCRIPTION("Xilinx Partial Reconfiguration Decoupler");