1 // SPDX-License-Identifier: GPL-2.0-only
3  * PolarFire SoC (MPFS) Peripheral Clock Reset Controller
16 #include <linux/reset-controller.h>
17 #include <dt-bindings/clock/microchip,mpfs-clock.h>
18 #include <soc/microchip/mpfs.h>
22  * defines in the dt to make things easier to configure - so this is accounting
44  * Peripheral clock resets
54 	reg = readl(rst->base);  in mpfs_assert()
56 	writel(reg, rst->base);  in mpfs_assert()
71 	reg = readl(rst->base);  in mpfs_deassert()
73 	writel(reg, rst->base);  in mpfs_deassert()
83 	u32 reg = readl(rst->base);  in mpfs_status()
113 	unsigned int index = reset_spec->args[0];  in mpfs_reset_xlate()
116 	 * CLK_RESERVED does not map to a clock, but it does map to a reset,  in mpfs_reset_xlate()
118 	 * so if this reset gets called - do not reset it.  in mpfs_reset_xlate()
121 		dev_err(rcdev->dev, "Resetting the fabric is not supported\n");  in mpfs_reset_xlate()
122 		return -EINVAL;  in mpfs_reset_xlate()
125 	if (index < MPFS_PERIPH_OFFSET || index >= (MPFS_PERIPH_OFFSET + rcdev->nr_resets)) {  in mpfs_reset_xlate()
126 		dev_err(rcdev->dev, "Invalid reset index %u\n", index);  in mpfs_reset_xlate()
127 		return -EINVAL;  in mpfs_reset_xlate()
130 	return index - MPFS_PERIPH_OFFSET;  in mpfs_reset_xlate()
136 	struct device *dev = &adev->dev;  in mpfs_reset_probe()
142 		return -ENOMEM;  in mpfs_reset_probe()
144 	rst->base = (void __iomem *)adev->dev.platform_data;  in mpfs_reset_probe()
146 	rcdev = &rst->rcdev;  in mpfs_reset_probe()
147 	rcdev->dev = dev;  in mpfs_reset_probe()
148 	rcdev->dev->parent = dev->parent;  in mpfs_reset_probe()
149 	rcdev->ops = &mpfs_reset_ops;  in mpfs_reset_probe()
150 	rcdev->of_node = dev->parent->of_node;  in mpfs_reset_probe()
151 	rcdev->of_reset_n_cells = 1;  in mpfs_reset_probe()
152 	rcdev->of_xlate = mpfs_reset_xlate;  in mpfs_reset_probe()
153 	rcdev->nr_resets = MPFS_NUM_RESETS;  in mpfs_reset_probe()
180 		return ERR_PTR(-ENOMEM);  in mpfs_reset_adev_alloc()
182 	adev->name = "reset-mpfs";  in mpfs_reset_adev_alloc()
183 	adev->dev.parent = clk_dev;  in mpfs_reset_adev_alloc()
184 	adev->dev.release = mpfs_reset_adev_release;  in mpfs_reset_adev_alloc()
185 	adev->id = 666u;  in mpfs_reset_adev_alloc()
211 	adev->dev.platform_data = (__force void *)base;  in mpfs_reset_controller_register()
219 		.name = "reset_mpfs.reset-mpfs",