2  * Memory-mapped interface driver for DW SPI Core
26 #include "spi-dw.h"
61 	struct dw_spi *dws = spi_master_get_devdata(spi->master);  in dw_spi_mscc_set_cs()
63 	struct dw_spi_mscc *dwsmscc = dwsmmio->priv;  in dw_spi_mscc_set_cs()
64 	u32 cs = spi->chip_select;  in dw_spi_mscc_set_cs()
72 		writel(sw_mode, dwsmscc->spi_mst + MSCC_SPI_MST_SW_MODE);  in dw_spi_mscc_set_cs()
84 	dwsmscc = devm_kzalloc(&pdev->dev, sizeof(*dwsmscc), GFP_KERNEL);  in dw_spi_mscc_init()
86 		return -ENOMEM;  in dw_spi_mscc_init()
89 	dwsmscc->spi_mst = devm_ioremap_resource(&pdev->dev, res);  in dw_spi_mscc_init()
90 	if (IS_ERR(dwsmscc->spi_mst)) {  in dw_spi_mscc_init()
91 		dev_err(&pdev->dev, "SPI_MST region map failed\n");  in dw_spi_mscc_init()
92 		return PTR_ERR(dwsmscc->spi_mst);  in dw_spi_mscc_init()
95 	dwsmscc->syscon = syscon_regmap_lookup_by_compatible("mscc,ocelot-cpu-syscon");  in dw_spi_mscc_init()
96 	if (IS_ERR(dwsmscc->syscon))  in dw_spi_mscc_init()
97 		return PTR_ERR(dwsmscc->syscon);  in dw_spi_mscc_init()
100 	writel(0, dwsmscc->spi_mst + MSCC_SPI_MST_SW_MODE);  in dw_spi_mscc_init()
103 	regmap_update_bits(dwsmscc->syscon, MSCC_CPU_SYSTEM_CTRL_GENERAL_CTRL,  in dw_spi_mscc_init()
107 	dwsmmio->dws.set_cs = dw_spi_mscc_set_cs;  in dw_spi_mscc_init()
108 	dwsmmio->priv = dwsmscc;  in dw_spi_mscc_init()
123 	dwsmmio = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_mmio),  in dw_spi_mmio_probe()
126 		return -ENOMEM;  in dw_spi_mmio_probe()
128 	dws = &dwsmmio->dws;  in dw_spi_mmio_probe()
132 	dws->regs = devm_ioremap_resource(&pdev->dev, mem);  in dw_spi_mmio_probe()
133 	if (IS_ERR(dws->regs)) {  in dw_spi_mmio_probe()
134 		dev_err(&pdev->dev, "SPI region map failed\n");  in dw_spi_mmio_probe()
135 		return PTR_ERR(dws->regs);  in dw_spi_mmio_probe()
138 	dws->irq = platform_get_irq(pdev, 0);  in dw_spi_mmio_probe()
139 	if (dws->irq < 0) {  in dw_spi_mmio_probe()
140 		dev_err(&pdev->dev, "no irq resource?\n");  in dw_spi_mmio_probe()
141 		return dws->irq; /* -ENXIO */  in dw_spi_mmio_probe()
144 	dwsmmio->clk = devm_clk_get(&pdev->dev, NULL);  in dw_spi_mmio_probe()
145 	if (IS_ERR(dwsmmio->clk))  in dw_spi_mmio_probe()
146 		return PTR_ERR(dwsmmio->clk);  in dw_spi_mmio_probe()
147 	ret = clk_prepare_enable(dwsmmio->clk);  in dw_spi_mmio_probe()
151 	dws->bus_num = pdev->id;  in dw_spi_mmio_probe()
153 	dws->max_freq = clk_get_rate(dwsmmio->clk);  in dw_spi_mmio_probe()
155 	device_property_read_u32(&pdev->dev, "reg-io-width", &dws->reg_io_width);  in dw_spi_mmio_probe()
159 	device_property_read_u32(&pdev->dev, "num-cs", &num_cs);  in dw_spi_mmio_probe()
161 	dws->num_cs = num_cs;  in dw_spi_mmio_probe()
163 	if (pdev->dev.of_node) {  in dw_spi_mmio_probe()
166 		for (i = 0; i < dws->num_cs; i++) {  in dw_spi_mmio_probe()
167 			int cs_gpio = of_get_named_gpio(pdev->dev.of_node,  in dw_spi_mmio_probe()
168 					"cs-gpios", i);  in dw_spi_mmio_probe()
170 			if (cs_gpio == -EPROBE_DEFER) {  in dw_spi_mmio_probe()
176 				ret = devm_gpio_request(&pdev->dev, cs_gpio,  in dw_spi_mmio_probe()
177 						dev_name(&pdev->dev));  in dw_spi_mmio_probe()
184 	init_func = device_get_match_data(&pdev->dev);  in dw_spi_mmio_probe()
191 	ret = dw_spi_add_host(&pdev->dev, dws);  in dw_spi_mmio_probe()
199 	clk_disable_unprepare(dwsmmio->clk);  in dw_spi_mmio_probe()
207 	dw_spi_remove_host(&dwsmmio->dws);  in dw_spi_mmio_remove()
208 	clk_disable_unprepare(dwsmmio->clk);  in dw_spi_mmio_remove()
214 	{ .compatible = "snps,dw-apb-ssi", },
215 	{ .compatible = "mscc,ocelot-spi", .data = dw_spi_mscc_init},
230 MODULE_AUTHOR("Jean-Hugues Deschenes <jean-hugues.deschenes@octasic.com>");
231 MODULE_DESCRIPTION("Memory-mapped I/O interface driver for DW SPI Core");