Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * TI AMx3 Wakeup M3 Remote Processor driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2014-2015 Texas Instruments, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Dave Gerlach <d-gerlach@ti.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Suman Anna <s-anna@ti.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/of_address.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/pm_runtime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/remoteproc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/platform_data/wkup_m3.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include "remoteproc_internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define WKUPM3_MEM_MAX	2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  * struct wkup_m3_mem - WkupM3 internal memory structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  * @cpu_addr: MPU virtual address of the memory region
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  * @bus_addr: Bus address used to access the memory region
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  * @dev_addr: Device address from Wakeup M3 view
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32)  * @size: Size of the memory region
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) struct wkup_m3_mem {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	void __iomem *cpu_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	phys_addr_t bus_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	u32 dev_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  * struct wkup_m3_rproc - WkupM3 remote processor state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  * @rproc: rproc handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)  * @pdev: pointer to platform device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45)  * @mem: WkupM3 memory information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) struct wkup_m3_rproc {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	struct rproc *rproc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	struct platform_device *pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	struct wkup_m3_mem mem[WKUPM3_MEM_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) static int wkup_m3_rproc_start(struct rproc *rproc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	struct wkup_m3_rproc *wkupm3 = rproc->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	struct platform_device *pdev = wkupm3->pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	struct wkup_m3_platform_data *pdata = dev_get_platdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	if (pdata->deassert_reset(pdev, pdata->reset_name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		dev_err(dev, "Unable to reset wkup_m3!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) static int wkup_m3_rproc_stop(struct rproc *rproc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	struct wkup_m3_rproc *wkupm3 = rproc->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	struct platform_device *pdev = wkupm3->pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	struct wkup_m3_platform_data *pdata = dev_get_platdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	if (pdata->assert_reset(pdev, pdata->reset_name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		dev_err(dev, "Unable to assert reset of wkup_m3!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) static void *wkup_m3_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	struct wkup_m3_rproc *wkupm3 = rproc->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	void *va = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	u32 offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	if (len == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	for (i = 0; i < WKUPM3_MEM_MAX; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		if (da >= wkupm3->mem[i].dev_addr && da + len <=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		    wkupm3->mem[i].dev_addr +  wkupm3->mem[i].size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 			offset = da -  wkupm3->mem[i].dev_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 			/* __force to make sparse happy with type conversion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 			va = (__force void *)(wkupm3->mem[i].cpu_addr + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	return va;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static const struct rproc_ops wkup_m3_rproc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	.start		= wkup_m3_rproc_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	.stop		= wkup_m3_rproc_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	.da_to_va	= wkup_m3_rproc_da_to_va,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static const struct of_device_id wkup_m3_rproc_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	{ .compatible = "ti,am3352-wkup-m3", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	{ .compatible = "ti,am4372-wkup-m3", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	{},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) MODULE_DEVICE_TABLE(of, wkup_m3_rproc_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) static int wkup_m3_rproc_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	struct wkup_m3_platform_data *pdata = dev->platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	/* umem always needs to be processed first */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	const char *mem_names[WKUPM3_MEM_MAX] = { "umem", "dmem" };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	struct wkup_m3_rproc *wkupm3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	const char *fw_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	struct rproc *rproc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	const __be32 *addrp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	u32 l4_offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	u64 size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	if (!(pdata && pdata->deassert_reset && pdata->assert_reset &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	      pdata->reset_name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		dev_err(dev, "Platform data missing!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	ret = of_property_read_string(dev->of_node, "ti,pm-firmware",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 				      &fw_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		dev_err(dev, "No firmware filename given\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	pm_runtime_enable(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	ret = pm_runtime_get_sync(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	rproc = rproc_alloc(dev, "wkup_m3", &wkup_m3_rproc_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 			    fw_name, sizeof(*wkupm3));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	if (!rproc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	rproc->auto_boot = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	wkupm3 = rproc->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	wkupm3->rproc = rproc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	wkupm3->pdev = pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	for (i = 0; i < ARRAY_SIZE(mem_names); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 						   mem_names[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		wkupm3->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		if (IS_ERR(wkupm3->mem[i].cpu_addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 			dev_err(&pdev->dev, "devm_ioremap_resource failed for resource %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 				i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 			ret = PTR_ERR(wkupm3->mem[i].cpu_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 			goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		wkupm3->mem[i].bus_addr = res->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		wkupm3->mem[i].size = resource_size(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		addrp = of_get_address(dev->of_node, i, &size, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		 * The wkupm3 has umem at address 0 in its view, so the device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		 * addresses for each memory region is computed as a relative
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		 * offset of the bus address for umem, and therefore needs to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		 * processed first.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		if (!strcmp(mem_names[i], "umem"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 			l4_offset = be32_to_cpu(*addrp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		wkupm3->mem[i].dev_addr = be32_to_cpu(*addrp) - l4_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	dev_set_drvdata(dev, rproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	ret = rproc_add(rproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		dev_err(dev, "rproc_add failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		goto err_put_rproc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) err_put_rproc:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	rproc_free(rproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	pm_runtime_put_noidle(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	pm_runtime_disable(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static int wkup_m3_rproc_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	struct rproc *rproc = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	rproc_del(rproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	rproc_free(rproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	pm_runtime_put_sync(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	pm_runtime_disable(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) #ifdef CONFIG_PM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) static int wkup_m3_rpm_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) static int wkup_m3_rpm_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) static const struct dev_pm_ops wkup_m3_rproc_pm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	SET_RUNTIME_PM_OPS(wkup_m3_rpm_suspend, wkup_m3_rpm_resume, NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static struct platform_driver wkup_m3_rproc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	.probe = wkup_m3_rproc_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	.remove = wkup_m3_rproc_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		.name = "wkup_m3_rproc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		.of_match_table = wkup_m3_rproc_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		.pm = &wkup_m3_rproc_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) module_platform_driver(wkup_m3_rproc_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) MODULE_DESCRIPTION("TI Wakeup M3 remote processor control driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) MODULE_AUTHOR("Dave Gerlach <d-gerlach@ti.com>");