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remoteproc: ingenic: Move clock handling to prepare/unprepare callbacks

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This patch moves clock related operations to the remoteproc prepare()
and unprepare() callbacks so that the PM runtime framework doesn't
have to be involved needlessly.  This provides a simpler approach and
requires less code.

Based on the work from Paul Cercueil published here:
https://lore.kernel.org/linux-remoteproc/20191116170846.67220-4-paul@crapouillou.net/

Reviewed-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200630163118.3830422-2-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Mathieu Poirier 2020-06-30 10:31:17 -06:00 committed by Bjorn Andersson
parent b3a9e3b962
commit 4605ad8f45
1 changed files with 26 additions and 58 deletions
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84
drivers/remoteproc/ingenic_rproc.c
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@ -11,7 +11,6 @@
#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/remoteproc.h>
#include "remoteproc_internal.h"
@ -62,6 +61,28 @@ struct vpu {
struct device *dev;
};
static int ingenic_rproc_prepare(struct rproc *rproc)
{
struct vpu *vpu = rproc->priv;
int ret;
/* The clocks must be enabled for the firmware to be loaded in TCSM */
ret = clk_bulk_prepare_enable(ARRAY_SIZE(vpu->clks), vpu->clks);
if (ret)
dev_err(vpu->dev, "Unable to start clocks: %d\n", ret);
return ret;
}
static int ingenic_rproc_unprepare(struct rproc *rproc)
{
struct vpu *vpu = rproc->priv;
clk_bulk_disable_unprepare(ARRAY_SIZE(vpu->clks), vpu->clks);
return 0;
}
static int ingenic_rproc_start(struct rproc *rproc)
{
struct vpu *vpu = rproc->priv;
@ -115,6 +136,8 @@ static void *ingenic_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len)
}
static struct rproc_ops ingenic_rproc_ops = {
.prepare = ingenic_rproc_prepare,
.unprepare = ingenic_rproc_unprepare,
.start = ingenic_rproc_start,
.stop = ingenic_rproc_stop,
.kick = ingenic_rproc_kick,
@ -135,16 +158,6 @@ static irqreturn_t vpu_interrupt(int irq, void *data)
return rproc_vq_interrupt(rproc, vring);
}
static void ingenic_rproc_disable_clks(void *data)
{
struct vpu *vpu = data;
pm_runtime_resume(vpu->dev);
pm_runtime_disable(vpu->dev);
clk_bulk_disable_unprepare(ARRAY_SIZE(vpu->clks), vpu->clks);
}
static int ingenic_rproc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@ -206,35 +219,13 @@ static int ingenic_rproc_probe(struct platform_device *pdev)
disable_irq(vpu->irq);
/* The clocks must be enabled for the firmware to be loaded in TCSM */
ret = clk_bulk_prepare_enable(ARRAY_SIZE(vpu->clks), vpu->clks);
if (ret) {
dev_err(dev, "Unable to start clocks\n");
return ret;
}
pm_runtime_irq_safe(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
pm_runtime_use_autosuspend(dev);
ret = devm_add_action_or_reset(dev, ingenic_rproc_disable_clks, vpu);
if (ret) {
dev_err(dev, "Unable to register action\n");
goto out_pm_put;
}
ret = devm_rproc_add(dev, rproc);
if (ret) {
dev_err(dev, "Failed to register remote processor\n");
goto out_pm_put;
return ret;
}
out_pm_put:
pm_runtime_put_autosuspend(dev);
return ret;
return 0;
}
static const struct of_device_id ingenic_rproc_of_matches[] = {
@ -243,33 +234,10 @@ static const struct of_device_id ingenic_rproc_of_matches[] = {
};
MODULE_DEVICE_TABLE(of, ingenic_rproc_of_matches);
static int __maybe_unused ingenic_rproc_suspend(struct device *dev)
{
struct vpu *vpu = dev_get_drvdata(dev);
clk_bulk_disable(ARRAY_SIZE(vpu->clks), vpu->clks);
return 0;
}
static int __maybe_unused ingenic_rproc_resume(struct device *dev)
{
struct vpu *vpu = dev_get_drvdata(dev);
return clk_bulk_enable(ARRAY_SIZE(vpu->clks), vpu->clks);
}
static const struct dev_pm_ops __maybe_unused ingenic_rproc_pm = {
SET_RUNTIME_PM_OPS(ingenic_rproc_suspend, ingenic_rproc_resume, NULL)
};
static struct platform_driver ingenic_rproc_driver = {
.probe = ingenic_rproc_probe,
.driver = {
.name = "ingenic-vpu",
#ifdef CONFIG_PM
.pm = &ingenic_rproc_pm,
#endif
.of_match_table = ingenic_rproc_of_matches,
},
};