[linux-block.git] / drivers / remoteproc / st_slim_rproc.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * SLIM core rproc driver
 *
 * Copyright (C) 2016 STMicroelectronics
 *
 * Author: Peter Griffin <peter.griffin@linaro.org>
 */

#include <linux/clk.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/remoteproc.h>
#include <linux/remoteproc/st_slim_rproc.h>
#include "remoteproc_internal.h"

/* SLIM core registers */
#define SLIM_ID_OFST		0x0
#define SLIM_VER_OFST		0x4

#define SLIM_EN_OFST		0x8
#define SLIM_EN_RUN			BIT(0)

#define SLIM_CLK_GATE_OFST	0xC
#define SLIM_CLK_GATE_DIS		BIT(0)
#define SLIM_CLK_GATE_RESET		BIT(2)

#define SLIM_SLIM_PC_OFST	0x20

/* DMEM registers */
#define SLIM_REV_ID_OFST	0x0
#define SLIM_REV_ID_MIN_MASK		GENMASK(15, 8)
#define SLIM_REV_ID_MIN(id)		((id & SLIM_REV_ID_MIN_MASK) >> 8)
#define SLIM_REV_ID_MAJ_MASK		GENMASK(23, 16)
#define SLIM_REV_ID_MAJ(id)		((id & SLIM_REV_ID_MAJ_MASK) >> 16)


/* peripherals registers */
#define SLIM_STBUS_SYNC_OFST	0xF88
#define SLIM_STBUS_SYNC_DIS		BIT(0)

#define SLIM_INT_SET_OFST	0xFD4
#define SLIM_INT_CLR_OFST	0xFD8
#define SLIM_INT_MASK_OFST	0xFDC

#define SLIM_CMD_CLR_OFST	0xFC8
#define SLIM_CMD_MASK_OFST	0xFCC

static const char *mem_names[ST_SLIM_MEM_MAX] = {
	[ST_SLIM_DMEM]	= "dmem",
	[ST_SLIM_IMEM]	= "imem",
};

static int slim_clk_get(struct st_slim_rproc *slim_rproc, struct device *dev)
{
	int clk, err;

	for (clk = 0; clk < ST_SLIM_MAX_CLK; clk++) {
		slim_rproc->clks[clk] = of_clk_get(dev->of_node, clk);
		if (IS_ERR(slim_rproc->clks[clk])) {
			err = PTR_ERR(slim_rproc->clks[clk]);
			if (err == -EPROBE_DEFER)
				goto err_put_clks;
			slim_rproc->clks[clk] = NULL;
			break;
		}
	}

	return 0;

err_put_clks:
	while (--clk >= 0)
		clk_put(slim_rproc->clks[clk]);

	return err;
}

static void slim_clk_disable(struct st_slim_rproc *slim_rproc)
{
	int clk;

	for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
		clk_disable_unprepare(slim_rproc->clks[clk]);
}

static int slim_clk_enable(struct st_slim_rproc *slim_rproc)
{
	int clk, ret;

	for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++) {
		ret = clk_prepare_enable(slim_rproc->clks[clk]);
		if (ret)
			goto err_disable_clks;
	}

	return 0;

err_disable_clks:
	while (--clk >= 0)
		clk_disable_unprepare(slim_rproc->clks[clk]);

	return ret;
}

/*
 * Remoteproc slim specific device handlers
 */
static int slim_rproc_start(struct rproc *rproc)
{
	struct device *dev = &rproc->dev;
	struct st_slim_rproc *slim_rproc = rproc->priv;
	unsigned long hw_id, hw_ver, fw_rev;
	u32 val;

	/* disable CPU pipeline clock & reset CPU pipeline */
	val = SLIM_CLK_GATE_DIS | SLIM_CLK_GATE_RESET;
	writel(val, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);

	/* disable SLIM core STBus sync */
	writel(SLIM_STBUS_SYNC_DIS, slim_rproc->peri + SLIM_STBUS_SYNC_OFST);

	/* enable cpu pipeline clock */
	writel(!SLIM_CLK_GATE_DIS,
		slim_rproc->slimcore + SLIM_CLK_GATE_OFST);

	/* clear int & cmd mailbox */
	writel(~0U, slim_rproc->peri + SLIM_INT_CLR_OFST);
	writel(~0U, slim_rproc->peri + SLIM_CMD_CLR_OFST);

	/* enable all channels cmd & int */
	writel(~0U, slim_rproc->peri + SLIM_INT_MASK_OFST);
	writel(~0U, slim_rproc->peri + SLIM_CMD_MASK_OFST);

	/* enable cpu */
	writel(SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);

	hw_id = readl_relaxed(slim_rproc->slimcore + SLIM_ID_OFST);
	hw_ver = readl_relaxed(slim_rproc->slimcore + SLIM_VER_OFST);

	fw_rev = readl(slim_rproc->mem[ST_SLIM_DMEM].cpu_addr +
			SLIM_REV_ID_OFST);

	dev_info(dev, "fw rev:%ld.%ld on SLIM %ld.%ld\n",
		 SLIM_REV_ID_MAJ(fw_rev), SLIM_REV_ID_MIN(fw_rev),
		 hw_id, hw_ver);

	return 0;
}

static int slim_rproc_stop(struct rproc *rproc)
{
	struct st_slim_rproc *slim_rproc = rproc->priv;
	u32 val;

	/* mask all (cmd & int) channels */
	writel(0UL, slim_rproc->peri + SLIM_INT_MASK_OFST);
	writel(0UL, slim_rproc->peri + SLIM_CMD_MASK_OFST);

	/* disable cpu pipeline clock */
	writel(SLIM_CLK_GATE_DIS, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);

	writel(!SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);

	val = readl(slim_rproc->slimcore + SLIM_EN_OFST);
	if (val & SLIM_EN_RUN)
		dev_warn(&rproc->dev, "Failed to disable SLIM");

	dev_dbg(&rproc->dev, "slim stopped\n");

	return 0;
}

static void *slim_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
{
	struct st_slim_rproc *slim_rproc = rproc->priv;
	void *va = NULL;
	int i;

	for (i = 0; i < ST_SLIM_MEM_MAX; i++) {
		if (da != slim_rproc->mem[i].bus_addr)
			continue;

		if (len <= slim_rproc->mem[i].size) {
			/* __force to make sparse happy with type conversion */
			va = (__force void *)slim_rproc->mem[i].cpu_addr;
			break;
		}
	}

	dev_dbg(&rproc->dev, "da = 0x%llx len = 0x%zx va = 0x%pK\n",
		da, len, va);

	return va;
}

static const struct rproc_ops slim_rproc_ops = {
	.start		= slim_rproc_start,
	.stop		= slim_rproc_stop,
	.da_to_va       = slim_rproc_da_to_va,
	.get_boot_addr	= rproc_elf_get_boot_addr,
	.load		= rproc_elf_load_segments,
	.sanity_check	= rproc_elf_sanity_check,
};

/**
 * st_slim_rproc_alloc() - allocate and initialise slim rproc
 * @pdev: Pointer to the platform_device struct
 * @fw_name: Name of firmware for rproc to use
 *
 * Function for allocating and initialising a slim rproc for use by
 * device drivers whose IP is based around the SLIM core. It
 * obtains and enables any clocks required by the SLIM core and also
 * ioremaps the various IO.
 *
 * Return: st_slim_rproc pointer or PTR_ERR() on error.
 */

struct st_slim_rproc *st_slim_rproc_alloc(struct platform_device *pdev,
				char *fw_name)
{
	struct device *dev = &pdev->dev;
	struct st_slim_rproc *slim_rproc;
	struct device_node *np = dev->of_node;
	struct rproc *rproc;
	struct resource *res;
	int err, i;

	if (!fw_name)
		return ERR_PTR(-EINVAL);

	if (!of_device_is_compatible(np, "st,slim-rproc"))
		return ERR_PTR(-EINVAL);

	rproc = rproc_alloc(dev, np->name, &slim_rproc_ops,
			fw_name, sizeof(*slim_rproc));
	if (!rproc)
		return ERR_PTR(-ENOMEM);

	rproc->has_iommu = false;

	slim_rproc = rproc->priv;
	slim_rproc->rproc = rproc;

	/* get imem and dmem */
	for (i = 0; i < ARRAY_SIZE(mem_names); i++) {
		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
						mem_names[i]);

		slim_rproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
		if (IS_ERR(slim_rproc->mem[i].cpu_addr)) {
			dev_err(&pdev->dev, "devm_ioremap_resource failed\n");
			err = PTR_ERR(slim_rproc->mem[i].cpu_addr);
			goto err;
		}
		slim_rproc->mem[i].bus_addr = res->start;
		slim_rproc->mem[i].size = resource_size(res);
	}

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "slimcore");
	slim_rproc->slimcore = devm_ioremap_resource(dev, res);
	if (IS_ERR(slim_rproc->slimcore)) {
		dev_err(&pdev->dev, "failed to ioremap slimcore IO\n");
		err = PTR_ERR(slim_rproc->slimcore);
		goto err;
	}

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "peripherals");
	slim_rproc->peri = devm_ioremap_resource(dev, res);
	if (IS_ERR(slim_rproc->peri)) {
		dev_err(&pdev->dev, "failed to ioremap peripherals IO\n");
		err = PTR_ERR(slim_rproc->peri);
		goto err;
	}

	err = slim_clk_get(slim_rproc, dev);
	if (err)
		goto err;

	err = slim_clk_enable(slim_rproc);
	if (err) {
		dev_err(dev, "Failed to enable clocks\n");
		goto err_clk_put;
	}

	/* Register as a remoteproc device */
	err = rproc_add(rproc);
	if (err) {
		dev_err(dev, "registration of slim remoteproc failed\n");
		goto err_clk_dis;
	}

	return slim_rproc;

err_clk_dis:
	slim_clk_disable(slim_rproc);
err_clk_put:
	for (i = 0; i < ST_SLIM_MAX_CLK && slim_rproc->clks[i]; i++)
		clk_put(slim_rproc->clks[i]);
err:
	rproc_free(rproc);
	return ERR_PTR(err);
}
EXPORT_SYMBOL(st_slim_rproc_alloc);

/**
  * st_slim_rproc_put() - put slim rproc resources
  * @slim_rproc: Pointer to the st_slim_rproc struct
  *
  * Function for calling respective _put() functions on slim_rproc resources.
  *
  */
void st_slim_rproc_put(struct st_slim_rproc *slim_rproc)
{
	int clk;

	if (!slim_rproc)
		return;

	slim_clk_disable(slim_rproc);

	for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
		clk_put(slim_rproc->clks[clk]);

	rproc_del(slim_rproc->rproc);
	rproc_free(slim_rproc->rproc);
}
EXPORT_SYMBOL(st_slim_rproc_put);

MODULE_AUTHOR("Peter Griffin <peter.griffin@linaro.org>");
MODULE_DESCRIPTION("STMicroelectronics SLIM core rproc driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
bb6869b2 PG	2	/*
	3	* SLIM core rproc driver
	4	*
	5	* Copyright (C) 2016 STMicroelectronics
	6	*
	7	* Author: Peter Griffin <peter.griffin@linaro.org>
bb6869b2 PG	8	*/
	9
	10	#include <linux/clk.h>
	11	#include <linux/err.h>
	12	#include <linux/kernel.h>
	13	#include <linux/module.h>
	14	#include <linux/of.h>
	15	#include <linux/of_device.h>
	16	#include <linux/platform_device.h>
	17	#include <linux/remoteproc.h>
	18	#include <linux/remoteproc/st_slim_rproc.h>
	19	#include "remoteproc_internal.h"
	20
	21	/* SLIM core registers */
	22	#define SLIM_ID_OFST 0x0
	23	#define SLIM_VER_OFST 0x4
	24
	25	#define SLIM_EN_OFST 0x8
	26	#define SLIM_EN_RUN BIT(0)
	27
	28	#define SLIM_CLK_GATE_OFST 0xC
	29	#define SLIM_CLK_GATE_DIS BIT(0)
	30	#define SLIM_CLK_GATE_RESET BIT(2)
	31
	32	#define SLIM_SLIM_PC_OFST 0x20
	33
	34	/* DMEM registers */
	35	#define SLIM_REV_ID_OFST 0x0
	36	#define SLIM_REV_ID_MIN_MASK GENMASK(15, 8)
	37	#define SLIM_REV_ID_MIN(id) ((id & SLIM_REV_ID_MIN_MASK) >> 8)
	38	#define SLIM_REV_ID_MAJ_MASK GENMASK(23, 16)
	39	#define SLIM_REV_ID_MAJ(id) ((id & SLIM_REV_ID_MAJ_MASK) >> 16)
	40
	41
	42	/* peripherals registers */
	43	#define SLIM_STBUS_SYNC_OFST 0xF88
	44	#define SLIM_STBUS_SYNC_DIS BIT(0)
	45
	46	#define SLIM_INT_SET_OFST 0xFD4
	47	#define SLIM_INT_CLR_OFST 0xFD8
	48	#define SLIM_INT_MASK_OFST 0xFDC
	49
	50	#define SLIM_CMD_CLR_OFST 0xFC8
	51	#define SLIM_CMD_MASK_OFST 0xFCC
	52
	53	static const char *mem_names[ST_SLIM_MEM_MAX] = {
	54	[ST_SLIM_DMEM] = "dmem",
	55	[ST_SLIM_IMEM] = "imem",
	56	};
	57
	58	static int slim_clk_get(struct st_slim_rproc slim_rproc, struct device dev)
	59	{
	60	int clk, err;
	61
	62	for (clk = 0; clk < ST_SLIM_MAX_CLK; clk++) {
	63	slim_rproc->clks[clk] = of_clk_get(dev->of_node, clk);
	64	if (IS_ERR(slim_rproc->clks[clk])) {
	65	err = PTR_ERR(slim_rproc->clks[clk]);
	66	if (err == -EPROBE_DEFER)
	67	goto err_put_clks;
	68	slim_rproc->clks[clk] = NULL;
	69	break;
	70	}
	71	}
72
73	return 0;
74
75	err_put_clks:
76	while (--clk >= 0)
77	clk_put(slim_rproc->clks[clk]);
78
79	return err;
80	}
81
82	static void slim_clk_disable(struct st_slim_rproc *slim_rproc)
83	{
84	int clk;
85
86	for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
87	clk_disable_unprepare(slim_rproc->clks[clk]);
88	}
89
90	static int slim_clk_enable(struct st_slim_rproc *slim_rproc)
91	{
92	int clk, ret;
93
94	for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++) {
95	ret = clk_prepare_enable(slim_rproc->clks[clk]);
96	if (ret)
97	goto err_disable_clks;
98	}
99
100	return 0;
101
102	err_disable_clks:
103	while (--clk >= 0)
104	clk_disable_unprepare(slim_rproc->clks[clk]);
105
106	return ret;
107	}
108
109	/*
110	* Remoteproc slim specific device handlers
111	*/
112	static int slim_rproc_start(struct rproc *rproc)
113	{
114	struct device *dev = &rproc->dev;
115	struct st_slim_rproc *slim_rproc = rproc->priv;
116	unsigned long hw_id, hw_ver, fw_rev;
117	u32 val;
118
119	/* disable CPU pipeline clock & reset CPU pipeline */
120	val = SLIM_CLK_GATE_DIS \| SLIM_CLK_GATE_RESET;
121	writel(val, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
122
123	/* disable SLIM core STBus sync */
124	writel(SLIM_STBUS_SYNC_DIS, slim_rproc->peri + SLIM_STBUS_SYNC_OFST);
125
126	/* enable cpu pipeline clock */
127	writel(!SLIM_CLK_GATE_DIS,
128	slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
129
130	/* clear int & cmd mailbox */
131	writel(~0U, slim_rproc->peri + SLIM_INT_CLR_OFST);
132	writel(~0U, slim_rproc->peri + SLIM_CMD_CLR_OFST);
133
134	/* enable all channels cmd & int */
135	writel(~0U, slim_rproc->peri + SLIM_INT_MASK_OFST);
136	writel(~0U, slim_rproc->peri + SLIM_CMD_MASK_OFST);
137
138	/* enable cpu */
139	writel(SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);
140
141	hw_id = readl_relaxed(slim_rproc->slimcore + SLIM_ID_OFST);
142	hw_ver = readl_relaxed(slim_rproc->slimcore + SLIM_VER_OFST);
143
144	fw_rev = readl(slim_rproc->mem[ST_SLIM_DMEM].cpu_addr +
145	SLIM_REV_ID_OFST);
146
147	dev_info(dev, "fw rev:%ld.%ld on SLIM %ld.%ld\n",
148	SLIM_REV_ID_MAJ(fw_rev), SLIM_REV_ID_MIN(fw_rev),
149	hw_id, hw_ver);
150
151	return 0;
152	}
153
154	static int slim_rproc_stop(struct rproc *rproc)
155	{
156	struct st_slim_rproc *slim_rproc = rproc->priv;
157	u32 val;
158
159	/* mask all (cmd & int) channels */
160	writel(0UL, slim_rproc->peri + SLIM_INT_MASK_OFST);
161	writel(0UL, slim_rproc->peri + SLIM_CMD_MASK_OFST);
162
163	/* disable cpu pipeline clock */
164	writel(SLIM_CLK_GATE_DIS, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
165
166	writel(!SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);
167
168	val = readl(slim_rproc->slimcore + SLIM_EN_OFST);
169	if (val & SLIM_EN_RUN)
170	dev_warn(&rproc->dev, "Failed to disable SLIM");
171
172	dev_dbg(&rproc->dev, "slim stopped\n");
173
174	return 0;
175	}
176
40df0a91	177	static void slim_rproc_da_to_va(struct rproc rproc, u64 da, size_t len, bool *is_iomem)
bb6869b2 PG	178	{
	179	struct st_slim_rproc *slim_rproc = rproc->priv;
	180	void *va = NULL;
	181	int i;
	182
	183	for (i = 0; i < ST_SLIM_MEM_MAX; i++) {
	184	if (da != slim_rproc->mem[i].bus_addr)
	185	continue;
	186
	187	if (len <= slim_rproc->mem[i].size) {
	188	/* __force to make sparse happy with type conversion */
	189	va = (__force void *)slim_rproc->mem[i].cpu_addr;
	190	break;
	191	}
	192	}
	193
9ce3bf22	194	dev_dbg(&rproc->dev, "da = 0x%llx len = 0x%zx va = 0x%pK\n",
4499665b	195	da, len, va);
bb6869b2 PG	196
	197	return va;
	198	}
	199
0f21f9cc BA	200	static const struct rproc_ops slim_rproc_ops = {
	201	.start = slim_rproc_start,
	202	.stop = slim_rproc_stop,
	203	.da_to_va = slim_rproc_da_to_va,
0f21f9cc BA	204	.get_boot_addr = rproc_elf_get_boot_addr,
0f21f9cc BA	205	.load = rproc_elf_load_segments,
e29ff72b	206	.sanity_check = rproc_elf_sanity_check,
bb6869b2 PG	207	};
	208
	209	/**
	210	* st_slim_rproc_alloc() - allocate and initialise slim rproc
	211	* @pdev: Pointer to the platform_device struct
	212	* @fw_name: Name of firmware for rproc to use
	213	*
	214	* Function for allocating and initialising a slim rproc for use by
	215	* device drivers whose IP is based around the SLIM core. It
	216	* obtains and enables any clocks required by the SLIM core and also
	217	* ioremaps the various IO.
	218	*
8f86e695	219	* Return: st_slim_rproc pointer or PTR_ERR() on error.
bb6869b2 PG	220	*/
	221
	222	struct st_slim_rproc st_slim_rproc_alloc(struct platform_device pdev,
	223	char *fw_name)
	224	{
	225	struct device *dev = &pdev->dev;
	226	struct st_slim_rproc *slim_rproc;
	227	struct device_node *np = dev->of_node;
	228	struct rproc *rproc;
	229	struct resource *res;
	230	int err, i;
bb6869b2 PG	231
	232	if (!fw_name)
	233	return ERR_PTR(-EINVAL);
	234
	235	if (!of_device_is_compatible(np, "st,slim-rproc"))
	236	return ERR_PTR(-EINVAL);
	237
	238	rproc = rproc_alloc(dev, np->name, &slim_rproc_ops,
	239	fw_name, sizeof(*slim_rproc));
	240	if (!rproc)
	241	return ERR_PTR(-ENOMEM);
	242
	243	rproc->has_iommu = false;
	244
	245	slim_rproc = rproc->priv;
	246	slim_rproc->rproc = rproc;
	247
bb6869b2 PG	248	/* get imem and dmem */
	249	for (i = 0; i < ARRAY_SIZE(mem_names); i++) {
	250	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
	251	mem_names[i]);
	252
	253	slim_rproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
	254	if (IS_ERR(slim_rproc->mem[i].cpu_addr)) {
	255	dev_err(&pdev->dev, "devm_ioremap_resource failed\n");
	256	err = PTR_ERR(slim_rproc->mem[i].cpu_addr);
	257	goto err;
	258	}
	259	slim_rproc->mem[i].bus_addr = res->start;
	260	slim_rproc->mem[i].size = resource_size(res);
	261	}
	262
	263	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "slimcore");
	264	slim_rproc->slimcore = devm_ioremap_resource(dev, res);
	265	if (IS_ERR(slim_rproc->slimcore)) {
	266	dev_err(&pdev->dev, "failed to ioremap slimcore IO\n");
	267	err = PTR_ERR(slim_rproc->slimcore);
	268	goto err;
	269	}
	270
	271	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "peripherals");
	272	slim_rproc->peri = devm_ioremap_resource(dev, res);
	273	if (IS_ERR(slim_rproc->peri)) {
	274	dev_err(&pdev->dev, "failed to ioremap peripherals IO\n");
	275	err = PTR_ERR(slim_rproc->peri);
	276	goto err;
	277	}
	278
	279	err = slim_clk_get(slim_rproc, dev);
	280	if (err)
	281	goto err;
	282
	283	err = slim_clk_enable(slim_rproc);
	284	if (err) {
	285	dev_err(dev, "Failed to enable clocks\n");
	286	goto err_clk_put;
	287	}
	288
	289	/* Register as a remoteproc device */
	290	err = rproc_add(rproc);
	291	if (err) {
	292	dev_err(dev, "registration of slim remoteproc failed\n");
	293	goto err_clk_dis;
	294	}
	295
	296	return slim_rproc;
	297
	298	err_clk_dis:
	299	slim_clk_disable(slim_rproc);
	300	err_clk_put:
	301	for (i = 0; i < ST_SLIM_MAX_CLK && slim_rproc->clks[i]; i++)
	302	clk_put(slim_rproc->clks[i]);
	303	err:
90a80d88	304	rproc_free(rproc);
bb6869b2 PG	305	return ERR_PTR(err);
	306	}
	307	EXPORT_SYMBOL(st_slim_rproc_alloc);
	308
	309	/**
	310	* st_slim_rproc_put() - put slim rproc resources
	311	* @slim_rproc: Pointer to the st_slim_rproc struct
	312	*
	313	* Function for calling respective _put() functions on slim_rproc resources.
	314	*
	315	*/
	316	void st_slim_rproc_put(struct st_slim_rproc *slim_rproc)
	317	{
	318	int clk;
	319
	320	if (!slim_rproc)
	321	return;
	322
	323	slim_clk_disable(slim_rproc);
	324
	325	for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
	326	clk_put(slim_rproc->clks[clk]);
	327
	328	rproc_del(slim_rproc->rproc);
90a80d88	329	rproc_free(slim_rproc->rproc);
bb6869b2 PG	330	}
	331	EXPORT_SYMBOL(st_slim_rproc_put);
	332
	333	MODULE_AUTHOR("Peter Griffin <peter.griffin@linaro.org>");
	334	MODULE_DESCRIPTION("STMicroelectronics SLIM core rproc driver");
	335	MODULE_LICENSE("GPL v2");