drivers/memory/pl353-smc.c

1 // SPDX-License-Identifier: GPL-2.0
3  * ARM PL353 SMC driver
5  * Copyright (C) 2012 - 2018 Xilinx, Inc
19  * struct pl353_smc_data - Private smc driver structure
32 	clk_disable(pl353_smc->memclk);  in pl353_smc_suspend()
33 	clk_disable(pl353_smc->aclk);  in pl353_smc_suspend()
43 	ret = clk_enable(pl353_smc->aclk);  in pl353_smc_resume()
49 	ret = clk_enable(pl353_smc->memclk);  in pl353_smc_resume()
52 		clk_disable(pl353_smc->aclk);  in pl353_smc_resume()
64 		.compatible = "cfi-flash"
67 		.compatible = "arm,pl353-nand-r2p1",
74 	struct device_node *of_node = adev->dev.of_node;  in pl353_smc_probe()
80 	pl353_smc = devm_kzalloc(&adev->dev, sizeof(*pl353_smc), GFP_KERNEL);  in pl353_smc_probe()
82 		return -ENOMEM;  in pl353_smc_probe()
84 	pl353_smc->aclk = devm_clk_get(&adev->dev, "apb_pclk");  in pl353_smc_probe()
85 	if (IS_ERR(pl353_smc->aclk)) {  in pl353_smc_probe()
86 		dev_err(&adev->dev, "aclk clock not found.\n");  in pl353_smc_probe()
87 		return PTR_ERR(pl353_smc->aclk);  in pl353_smc_probe()
90 	pl353_smc->memclk = devm_clk_get(&adev->dev, "memclk");  in pl353_smc_probe()
91 	if (IS_ERR(pl353_smc->memclk)) {  in pl353_smc_probe()
92 		dev_err(&adev->dev, "memclk clock not found.\n");  in pl353_smc_probe()
93 		return PTR_ERR(pl353_smc->memclk);  in pl353_smc_probe()
96 	err = clk_prepare_enable(pl353_smc->aclk);  in pl353_smc_probe()
98 		dev_err(&adev->dev, "Unable to enable AXI clock.\n");  in pl353_smc_probe()
102 	err = clk_prepare_enable(pl353_smc->memclk);  in pl353_smc_probe()
104 		dev_err(&adev->dev, "Unable to enable memory clock.\n");  in pl353_smc_probe()
114 			dev_warn(&adev->dev, "unsupported child node\n");  in pl353_smc_probe()
120 		err = -ENODEV;  in pl353_smc_probe()
121 		dev_err(&adev->dev, "no matching children\n");  in pl353_smc_probe()
125 	of_platform_device_create(child, NULL, &adev->dev);  in pl353_smc_probe()
131 	clk_disable_unprepare(pl353_smc->memclk);  in pl353_smc_probe()
133 	clk_disable_unprepare(pl353_smc->aclk);  in pl353_smc_probe()
142 	clk_disable_unprepare(pl353_smc->memclk);  in pl353_smc_remove()
143 	clk_disable_unprepare(pl353_smc->aclk);  in pl353_smc_remove()
158 		.name = "pl353-smc",
169 MODULE_DESCRIPTION("ARM PL353 SMC Driver");