1 // SPDX-License-Identifier: GPL-2.0-only
6  * FPGA Bridge Driver for the Xilinx LogiCORE Partial Reconfiguration
17 #include <linux/fpga/fpga-bridge.h>
36 	writel(val, d->io_base + offset);  in xlnx_pr_decoupler_write()
42 	return readl(d->io_base + offset);  in xlnx_pr_decouple_read()
45 static int xlnx_pr_decoupler_enable_set(struct fpga_bridge *bridge, bool enable)  in xlnx_pr_decoupler_enable_set()  argument
48 	struct xlnx_pr_decoupler_data *priv = bridge->priv;  in xlnx_pr_decoupler_enable_set()
50 	err = clk_enable(priv->clk);  in xlnx_pr_decoupler_enable_set()
59 	clk_disable(priv->clk);  in xlnx_pr_decoupler_enable_set()
64 static int xlnx_pr_decoupler_enable_show(struct fpga_bridge *bridge)  in xlnx_pr_decoupler_enable_show()  argument
66 	const struct xlnx_pr_decoupler_data *priv = bridge->priv;  in xlnx_pr_decoupler_enable_show()
70 	err = clk_enable(priv->clk);  in xlnx_pr_decoupler_enable_show()
76 	clk_disable(priv->clk);  in xlnx_pr_decoupler_enable_show()
95 	{ .compatible = "xlnx,pr-decoupler-1.00", .data = &decoupler_config },
96 	{ .compatible = "xlnx,pr-decoupler", .data = &decoupler_config },
97 	{ .compatible = "xlnx,dfx-axi-shutdown-manager-1.00",
99 	{ .compatible = "xlnx,dfx-axi-shutdown-manager",
111 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);  in xlnx_pr_decoupler_probe()
113 		return -ENOMEM;  in xlnx_pr_decoupler_probe()
115 	priv->ipconfig = device_get_match_data(&pdev->dev);  in xlnx_pr_decoupler_probe()
117 	priv->io_base = devm_platform_ioremap_resource(pdev, 0);  in xlnx_pr_decoupler_probe()
118 	if (IS_ERR(priv->io_base))  in xlnx_pr_decoupler_probe()
119 		return PTR_ERR(priv->io_base);  in xlnx_pr_decoupler_probe()
121 	priv->clk = devm_clk_get(&pdev->dev, "aclk");  in xlnx_pr_decoupler_probe()
122 	if (IS_ERR(priv->clk))  in xlnx_pr_decoupler_probe()
123 		return dev_err_probe(&pdev->dev, PTR_ERR(priv->clk),  in xlnx_pr_decoupler_probe()
126 	err = clk_prepare_enable(priv->clk);  in xlnx_pr_decoupler_probe()
128 		dev_err(&pdev->dev, "unable to enable clock\n");  in xlnx_pr_decoupler_probe()
132 	clk_disable(priv->clk);  in xlnx_pr_decoupler_probe()
134 	br = fpga_bridge_register(&pdev->dev, priv->ipconfig->name,  in xlnx_pr_decoupler_probe()
138 		dev_err(&pdev->dev, "unable to register %s",  in xlnx_pr_decoupler_probe()
139 			priv->ipconfig->name);  in xlnx_pr_decoupler_probe()
148 	clk_unprepare(priv->clk);  in xlnx_pr_decoupler_probe()
155 	struct fpga_bridge *bridge = platform_get_drvdata(pdev);  in xlnx_pr_decoupler_remove()  local
156 	struct xlnx_pr_decoupler_data *p = bridge->priv;  in xlnx_pr_decoupler_remove()
158 	fpga_bridge_unregister(bridge);  in xlnx_pr_decoupler_remove()
160 	clk_unprepare(p->clk);  in xlnx_pr_decoupler_remove()