2  * drivers/mmc/host/sdhci-spear.c
9  * Inspired by sdhci-pltfm.c
12  * License version 2. This program is licensed "as is" without any
27 #include <linux/mmc/slot-gpio.h>
50 	dev = pdev->dev.parent ? pdev->dev.parent : &pdev->dev;  in sdhci_probe()
54 		dev_dbg(&pdev->dev, "cannot allocate memory for sdhci\n");  in sdhci_probe()
58 	host->ioaddr = devm_platform_ioremap_resource(pdev, 0);  in sdhci_probe()
59 	if (IS_ERR(host->ioaddr)) {  in sdhci_probe()
60 		ret = PTR_ERR(host->ioaddr);  in sdhci_probe()
61 		dev_dbg(&pdev->dev, "unable to map iomem: %d\n", ret);  in sdhci_probe()
65 	host->hw_name = "sdhci";  in sdhci_probe()
66 	host->ops = &sdhci_pltfm_ops;  in sdhci_probe()
67 	host->irq = platform_get_irq(pdev, 0);  in sdhci_probe()
68 	if (host->irq < 0) {  in sdhci_probe()
69 		ret = host->irq;  in sdhci_probe()
72 	host->quirks = SDHCI_QUIRK_BROKEN_ADMA;  in sdhci_probe()
77 	sdhci->clk = devm_clk_get(&pdev->dev, NULL);  in sdhci_probe()
78 	if (IS_ERR(sdhci->clk)) {  in sdhci_probe()
79 		ret = PTR_ERR(sdhci->clk);  in sdhci_probe()
80 		dev_dbg(&pdev->dev, "Error getting clock\n");  in sdhci_probe()
84 	ret = clk_prepare_enable(sdhci->clk);  in sdhci_probe()
86 		dev_dbg(&pdev->dev, "Error enabling clock\n");  in sdhci_probe()
90 	ret = clk_set_rate(sdhci->clk, 50000000);  in sdhci_probe()
92 		dev_dbg(&pdev->dev, "Error setting desired clk, clk=%lu\n",  in sdhci_probe()
93 				clk_get_rate(sdhci->clk));  in sdhci_probe()
96 	 * It is optional to use GPIOs for sdhci card detection. If we  in sdhci_probe()
99 	ret = mmc_gpiod_request_cd(host->mmc, "cd", 0, false, 0);  in sdhci_probe()
100 	if (ret == -EPROBE_DEFER)  in sdhci_probe()
112 	clk_disable_unprepare(sdhci->clk);  in sdhci_probe()
116 	dev_err(&pdev->dev, "spear-sdhci probe failed: %d\n", ret);  in sdhci_probe()
127 	scratch = readl(host->ioaddr + SDHCI_INT_STATUS);  in sdhci_remove()
128 	if (scratch == (u32)-1)  in sdhci_remove()
132 	clk_disable_unprepare(sdhci->clk);  in sdhci_remove()
143 	if (host->tuning_mode != SDHCI_TUNING_MODE_3)  in sdhci_suspend()
144 		mmc_retune_needed(host->mmc);  in sdhci_suspend()
148 		clk_disable(sdhci->clk);  in sdhci_suspend()
159 	ret = clk_enable(sdhci->clk);  in sdhci_resume()
172 	{ .compatible = "st,spear300-sdhci" },