3  *  linux/arch/arm/mach-pxa/ssp.c
5  *  based on linux/arch/arm/mach-sa1100/ssp.c by Russell King
10  *  PXA2xx SSP driver.  This provides the generic core for simple
11  *  IO-based SSP applications and allows easy port setup for DMA access.
40 	struct ssp_device *ssp = NULL;  in pxa_ssp_request()  local
44 	list_for_each_entry(ssp, &ssp_list, node) {  in pxa_ssp_request()
45 		if (ssp->port_id == port && ssp->use_count == 0) {  in pxa_ssp_request()
46 			ssp->use_count++;  in pxa_ssp_request()
47 			ssp->label = label;  in pxa_ssp_request()
54 	if (&ssp->node == &ssp_list)  in pxa_ssp_request()
57 	return ssp;  in pxa_ssp_request()
64 	struct ssp_device *ssp = NULL;  in pxa_ssp_request_of()  local
68 	list_for_each_entry(ssp, &ssp_list, node) {  in pxa_ssp_request_of()
69 		if (ssp->of_node == of_node && ssp->use_count == 0) {  in pxa_ssp_request_of()
70 			ssp->use_count++;  in pxa_ssp_request_of()
71 			ssp->label = label;  in pxa_ssp_request_of()
78 	if (&ssp->node == &ssp_list)  in pxa_ssp_request_of()
81 	return ssp;  in pxa_ssp_request_of()
85 void pxa_ssp_free(struct ssp_device *ssp)  in pxa_ssp_free()  argument
88 	if (ssp->use_count) {  in pxa_ssp_free()
89 		ssp->use_count--;  in pxa_ssp_free()
90 		ssp->label = NULL;  in pxa_ssp_free()
92 		dev_err(ssp->dev, "device already free\n");  in pxa_ssp_free()
99 	{ .compatible = "mrvl,pxa25x-ssp",	.data = (void *) PXA25x_SSP },
101 	{ .compatible = "mrvl,pxa27x-ssp",	.data = (void *) PXA27x_SSP },
102 	{ .compatible = "mrvl,pxa3xx-ssp",	.data = (void *) PXA3xx_SSP },
103 	{ .compatible = "mvrl,pxa168-ssp",	.data = (void *) PXA168_SSP },
104 	{ .compatible = "mrvl,pxa910-ssp",	.data = (void *) PXA910_SSP },
105 	{ .compatible = "mrvl,ce4100-ssp",	.data = (void *) CE4100_SSP },
114 	struct ssp_device *ssp;  in pxa_ssp_probe()  local
117 	ssp = devm_kzalloc(dev, sizeof(struct ssp_device), GFP_KERNEL);  in pxa_ssp_probe()
118 	if (ssp == NULL)  in pxa_ssp_probe()
121 	ssp->dev = dev;  in pxa_ssp_probe()
123 	ssp->clk = devm_clk_get(dev, NULL);  in pxa_ssp_probe()
124 	if (IS_ERR(ssp->clk))  in pxa_ssp_probe()
125 		return PTR_ERR(ssp->clk);  in pxa_ssp_probe()
140 	ssp->phys_base = res->start;  in pxa_ssp_probe()
142 	ssp->mmio_base = devm_ioremap(dev, res->start, resource_size(res));  in pxa_ssp_probe()
143 	if (ssp->mmio_base == NULL) {  in pxa_ssp_probe()
148 	ssp->irq = platform_get_irq(pdev, 0);  in pxa_ssp_probe()
149 	if (ssp->irq < 0)  in pxa_ssp_probe()
155 		ssp->type = (uintptr_t) id->data;  in pxa_ssp_probe()
159 		ssp->type = id->driver_data;  in pxa_ssp_probe()
161 		/* PXA2xx/3xx SSP ports starts from 1 and the internal pdev->id  in pxa_ssp_probe()
164 		ssp->port_id = pdev->id + 1;  in pxa_ssp_probe()
167 	ssp->use_count = 0;  in pxa_ssp_probe()
168 	ssp->of_node = dev->of_node;  in pxa_ssp_probe()
171 	list_add(&ssp->node, &ssp_list);  in pxa_ssp_probe()
174 	platform_set_drvdata(pdev, ssp);  in pxa_ssp_probe()
181 	struct ssp_device *ssp = platform_get_drvdata(pdev);  in pxa_ssp_remove()  local
184 	list_del(&ssp->node);  in pxa_ssp_remove()
189 	{ "pxa25x-ssp",		PXA25x_SSP },
191 	{ "pxa27x-ssp",		PXA27x_SSP },
192 	{ "pxa3xx-ssp",		PXA3xx_SSP },
193 	{ "pxa168-ssp",		PXA168_SSP },
194 	{ "pxa910-ssp",		PXA910_SSP },
202 		.name		= "pxa2xx-ssp",
221 MODULE_DESCRIPTION("PXA SSP driver");