1 files changed, 0 insertions, 331 deletions
diff --git a/drivers/net/ipa/ipa_clock.c b/drivers/net/ipa/ipa_clock.c
deleted file mode 100644
index 69ef6ea41e61..000000000000
--- a/drivers/net/ipa/ipa_clock.c
+++ /dev/null
@@ -1,331 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
- * Copyright (C) 2018-2021 Linaro Ltd.
- */
-
-#include <linux/refcount.h>
-#include <linux/mutex.h>
-#include <linux/clk.h>
-#include <linux/device.h>
-#include <linux/interconnect.h>
-
-#include "ipa.h"
-#include "ipa_clock.h"
-#include "ipa_modem.h"
-#include "ipa_data.h"
-
-/**
- * DOC: IPA Clocking
- *
- * The "IPA Clock" manages both the IPA core clock and the interconnects
- * (buses) the IPA depends on as a single logical entity.  A reference count
- * is incremented by "get" operations and decremented by "put" operations.
- * Transitions of that count from 0 to 1 result in the clock and interconnects
- * being enabled, and transitions of the count from 1 to 0 cause them to be
- * disabled.  We currently operate the core clock at a fixed clock rate, and
- * all buses at a fixed average and peak bandwidth.  As more advanced IPA
- * features are enabled, we can make better use of clock and bus scaling.
- *
- * An IPA clock reference must be held for any access to IPA hardware.
- */
-
-/**
- * struct ipa_interconnect - IPA interconnect information
- * @path:		Interconnect path
- * @average_bandwidth:	Average interconnect bandwidth (KB/second)
- * @peak_bandwidth:	Peak interconnect bandwidth (KB/second)
- */
-struct ipa_interconnect {
-	struct icc_path *path;
-	u32 average_bandwidth;
-	u32 peak_bandwidth;
-};
-
-/**
- * struct ipa_clock - IPA clocking information
- * @count:		Clocking reference count
- * @mutex:		Protects clock enable/disable
- * @core:		IPA core clock
- * @interconnect_count:	Number of elements in interconnect[]
- * @interconnect:	Interconnect array
- */
-struct ipa_clock {
-	refcount_t count;
-	struct mutex mutex; /* protects clock enable/disable */
-	struct clk *core;
-	u32 interconnect_count;
-	struct ipa_interconnect *interconnect;
-};
-
-static int ipa_interconnect_init_one(struct device *dev,
-				     struct ipa_interconnect *interconnect,
-				     const struct ipa_interconnect_data *data)
-{
-	struct icc_path *path;
-
-	path = of_icc_get(dev, data->name);
-	if (IS_ERR(path)) {
-		int ret = PTR_ERR(path);
-
-		dev_err_probe(dev, ret, "error getting %s interconnect\n",
-			      data->name);
-
-		return ret;
-	}
-
-	interconnect->path = path;
-	interconnect->average_bandwidth = data->average_bandwidth;
-	interconnect->peak_bandwidth = data->peak_bandwidth;
-
-	return 0;
-}
-
-static void ipa_interconnect_exit_one(struct ipa_interconnect *interconnect)
-{
-	icc_put(interconnect->path);
-	memset(interconnect, 0, sizeof(*interconnect));
-}
-
-/* Initialize interconnects required for IPA operation */
-static int ipa_interconnect_init(struct ipa_clock *clock, struct device *dev,
-				 const struct ipa_interconnect_data *data)
-{
-	struct ipa_interconnect *interconnect;
-	u32 count;
-	int ret;
-
-	count = clock->interconnect_count;
-	interconnect = kcalloc(count, sizeof(*interconnect), GFP_KERNEL);
-	if (!interconnect)
-		return -ENOMEM;
-	clock->interconnect = interconnect;
-
-	while (count--) {
-		ret = ipa_interconnect_init_one(dev, interconnect, data++);
-		if (ret)
-			goto out_unwind;
-		interconnect++;
-	}
-
-	return 0;
-
-out_unwind:
-	while (interconnect-- > clock->interconnect)
-		ipa_interconnect_exit_one(interconnect);
-	kfree(clock->interconnect);
-	clock->interconnect = NULL;
-
-	return ret;
-}
-
-/* Inverse of ipa_interconnect_init() */
-static void ipa_interconnect_exit(struct ipa_clock *clock)
-{
-	struct ipa_interconnect *interconnect;
-
-	interconnect = clock->interconnect + clock->interconnect_count;
-	while (interconnect-- > clock->interconnect)
-		ipa_interconnect_exit_one(interconnect);
-	kfree(clock->interconnect);
-	clock->interconnect = NULL;
-}
-
-/* Currently we only use one bandwidth level, so just "enable" interconnects */
-static int ipa_interconnect_enable(struct ipa *ipa)
-{
-	struct ipa_interconnect *interconnect;
-	struct ipa_clock *clock = ipa->clock;
-	int ret;
-	u32 i;
-
-	interconnect = clock->interconnect;
-	for (i = 0; i < clock->interconnect_count; i++) {
-		ret = icc_set_bw(interconnect->path,
-				 interconnect->average_bandwidth,
-				 interconnect->peak_bandwidth);
-		if (ret)
-			goto out_unwind;
-		interconnect++;
-	}
-
-	return 0;
-
-out_unwind:
-	while (interconnect-- > clock->interconnect)
-		(void)icc_set_bw(interconnect->path, 0, 0);
-
-	return ret;
-}
-
-/* To disable an interconnect, we just its bandwidth to 0 */
-static void ipa_interconnect_disable(struct ipa *ipa)
-{
-	struct ipa_interconnect *interconnect;
-	struct ipa_clock *clock = ipa->clock;
-	int result = 0;
-	u32 count;
-	int ret;
-
-	count = clock->interconnect_count;
-	interconnect = clock->interconnect + count;
-	while (count--) {
-		interconnect--;
-		ret = icc_set_bw(interconnect->path, 0, 0);
-		if (ret && !result)
-			result = ret;
-	}
-
-	if (result)
-		dev_err(&ipa->pdev->dev,
-			"error %d disabling IPA interconnects\n", ret);
-}
-
-/* Turn on IPA clocks, including interconnects */
-static int ipa_clock_enable(struct ipa *ipa)
-{
-	int ret;
-
-	ret = ipa_interconnect_enable(ipa);
-	if (ret)
-		return ret;
-
-	ret = clk_prepare_enable(ipa->clock->core);
-	if (ret)
-		ipa_interconnect_disable(ipa);
-
-	return ret;
-}
-
-/* Inverse of ipa_clock_enable() */
-static void ipa_clock_disable(struct ipa *ipa)
-{
-	clk_disable_unprepare(ipa->clock->core);
-	ipa_interconnect_disable(ipa);
-}
-
-/* Get an IPA clock reference, but only if the reference count is
- * already non-zero.  Returns true if the additional reference was
- * added successfully, or false otherwise.
- */
-bool ipa_clock_get_additional(struct ipa *ipa)
-{
-	return refcount_inc_not_zero(&ipa->clock->count);
-}
-
-/* Get an IPA clock reference.  If the reference count is non-zero, it is
- * incremented and return is immediate.  Otherwise it is checked again
- * under protection of the mutex, and if appropriate the IPA clock
- * is enabled.
- *
- * Incrementing the reference count is intentionally deferred until
- * after the clock is running and endpoints are resumed.
- */
-void ipa_clock_get(struct ipa *ipa)
-{
-	struct ipa_clock *clock = ipa->clock;
-	int ret;
-
-	/* If the clock is running, just bump the reference count */
-	if (ipa_clock_get_additional(ipa))
-		return;
-
-	/* Otherwise get the mutex and check again */
-	mutex_lock(&clock->mutex);
-
-	/* A reference might have been added before we got the mutex. */
-	if (ipa_clock_get_additional(ipa))
-		goto out_mutex_unlock;
-
-	ret = ipa_clock_enable(ipa);
-	if (ret) {
-		dev_err(&ipa->pdev->dev, "error %d enabling IPA clock\n", ret);
-		goto out_mutex_unlock;
-	}
-
-	refcount_set(&clock->count, 1);
-
-out_mutex_unlock:
-	mutex_unlock(&clock->mutex);
-}
-
-/* Attempt to remove an IPA clock reference.  If this represents the
- * last reference, disable the IPA clock under protection of the mutex.
- */
-void ipa_clock_put(struct ipa *ipa)
-{
-	struct ipa_clock *clock = ipa->clock;
-
-	/* If this is not the last reference there's nothing more to do */
-	if (!refcount_dec_and_mutex_lock(&clock->count, &clock->mutex))
-		return;
-
-	ipa_clock_disable(ipa);
-
-	mutex_unlock(&clock->mutex);
-}
-
-/* Return the current IPA core clock rate */
-u32 ipa_clock_rate(struct ipa *ipa)
-{
-	return ipa->clock ? (u32)clk_get_rate(ipa->clock->core) : 0;
-}
-
-/* Initialize IPA clocking */
-struct ipa_clock *
-ipa_clock_init(struct device *dev, const struct ipa_clock_data *data)
-{
-	struct ipa_clock *clock;
-	struct clk *clk;
-	int ret;
-
-	clk = clk_get(dev, "core");
-	if (IS_ERR(clk)) {
-		dev_err_probe(dev, PTR_ERR(clk), "error getting core clock\n");
-
-		return ERR_CAST(clk);
-	}
-
-	ret = clk_set_rate(clk, data->core_clock_rate);
-	if (ret) {
-		dev_err(dev, "error %d setting core clock rate to %u\n",
-			ret, data->core_clock_rate);
-		goto err_clk_put;
-	}
-
-	clock = kzalloc(sizeof(*clock), GFP_KERNEL);
-	if (!clock) {
-		ret = -ENOMEM;
-		goto err_clk_put;
-	}
-	clock->core = clk;
-	clock->interconnect_count = data->interconnect_count;
-
-	ret = ipa_interconnect_init(clock, dev, data->interconnect_data);
-	if (ret)
-		goto err_kfree;
-
-	mutex_init(&clock->mutex);
-	refcount_set(&clock->count, 0);
-
-	return clock;
-
-err_kfree:
-	kfree(clock);
-err_clk_put:
-	clk_put(clk);
-
-	return ERR_PTR(ret);
-}
-
-/* Inverse of ipa_clock_init() */
-void ipa_clock_exit(struct ipa_clock *clock)
-{
-	struct clk *clk = clock->core;
-
-	WARN_ON(refcount_read(&clock->count) != 0);
-	mutex_destroy(&clock->mutex);
-	ipa_interconnect_exit(clock);
-	kfree(clock);
-	clk_put(clk);
-}