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Message-ID: <20200513174706.3eeddb2b@xhacker.debian>
Date: Wed, 13 May 2020 17:47:06 +0800
From: Jisheng Zhang <Jisheng.Zhang@...aptics.com>
To: Adrian Hunter <adrian.hunter@...el.com>,
Ulf Hansson <ulf.hansson@...aro.org>
Cc: linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] Revert "mmc: sdhci-xenon: add runtime pm support and
reimplement standby"
This reverts commit a027b2c5fed78851e69fab395b02d127a7759fc7.
The HW supports auto clock gating, so it's useless to do runtime pm
in software.
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@...aptics.com>
---
drivers/mmc/host/sdhci-xenon.c | 87 +++++++---------------------------
drivers/mmc/host/sdhci-xenon.h | 1 -
2 files changed, 16 insertions(+), 72 deletions(-)
diff --git a/drivers/mmc/host/sdhci-xenon.c b/drivers/mmc/host/sdhci-xenon.c
index 4703cd540c7f..85414e13e7ea 100644
--- a/drivers/mmc/host/sdhci-xenon.c
+++ b/drivers/mmc/host/sdhci-xenon.c
@@ -15,8 +15,6 @@
#include <linux/ktime.h>
#include <linux/module.h>
#include <linux/of.h>
-#include <linux/pm.h>
-#include <linux/pm_runtime.h>
#include "sdhci-pltfm.h"
#include "sdhci-xenon.h"
@@ -539,24 +537,13 @@ static int xenon_probe(struct platform_device *pdev)
if (err)
goto err_clk_axi;
- pm_runtime_get_noresume(&pdev->dev);
- pm_runtime_set_active(&pdev->dev);
- pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
- pm_runtime_use_autosuspend(&pdev->dev);
- pm_runtime_enable(&pdev->dev);
- pm_suspend_ignore_children(&pdev->dev, 1);
-
err = sdhci_add_host(host);
if (err)
goto remove_sdhc;
- pm_runtime_put_autosuspend(&pdev->dev);
-
return 0;
remove_sdhc:
- pm_runtime_disable(&pdev->dev);
- pm_runtime_put_noidle(&pdev->dev);
xenon_sdhc_unprepare(host);
err_clk_axi:
clk_disable_unprepare(priv->axi_clk);
@@ -573,10 +560,6 @@ static int xenon_remove(struct platform_device *pdev)
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
- pm_runtime_get_sync(&pdev->dev);
- pm_runtime_disable(&pdev->dev);
- pm_runtime_put_noidle(&pdev->dev);
-
sdhci_remove_host(host, 0);
xenon_sdhc_unprepare(host);
@@ -593,78 +576,40 @@ static int xenon_suspend(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
- struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
int ret;
- ret = pm_runtime_force_suspend(dev);
+ ret = sdhci_suspend_host(host);
+ if (ret)
+ return ret;
- priv->restore_needed = true;
+ clk_disable_unprepare(pltfm_host->clk);
return ret;
}
-#endif
-#ifdef CONFIG_PM
-static int xenon_runtime_suspend(struct device *dev)
+static int xenon_resume(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
- struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
int ret;
- ret = sdhci_runtime_suspend_host(host);
+ ret = clk_prepare_enable(pltfm_host->clk);
if (ret)
return ret;
- if (host->tuning_mode != SDHCI_TUNING_MODE_3)
- mmc_retune_needed(host->mmc);
-
- clk_disable_unprepare(pltfm_host->clk);
/*
- * Need to update the priv->clock here, or when runtime resume
- * back, phy don't aware the clock change and won't adjust phy
- * which will cause cmd err
+ * If SoCs power off the entire Xenon, registers setting will
+ * be lost.
+ * Re-configure Xenon specific register to enable current SDHC
*/
- priv->clock = 0;
- return 0;
-}
-
-static int xenon_runtime_resume(struct device *dev)
-{
- struct sdhci_host *host = dev_get_drvdata(dev);
- struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
- struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
- int ret;
-
- ret = clk_prepare_enable(pltfm_host->clk);
- if (ret) {
- dev_err(dev, "can't enable mainck\n");
+ ret = xenon_sdhc_prepare(host);
+ if (ret)
return ret;
- }
-
- if (priv->restore_needed) {
- ret = xenon_sdhc_prepare(host);
- if (ret)
- goto out;
- priv->restore_needed = false;
- }
- ret = sdhci_runtime_resume_host(host, 0);
- if (ret)
- goto out;
- return 0;
-out:
- clk_disable_unprepare(pltfm_host->clk);
- return ret;
+ return sdhci_resume_host(host);
}
-#endif /* CONFIG_PM */
-
-static const struct dev_pm_ops sdhci_xenon_dev_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(xenon_suspend,
- pm_runtime_force_resume)
- SET_RUNTIME_PM_OPS(xenon_runtime_suspend,
- xenon_runtime_resume,
- NULL)
-};
+#endif
+
+static SIMPLE_DEV_PM_OPS(xenon_pmops, xenon_suspend, xenon_resume);
static const struct of_device_id sdhci_xenon_dt_ids[] = {
{ .compatible = "marvell,armada-ap806-sdhci",},
@@ -678,7 +623,7 @@ static struct platform_driver sdhci_xenon_driver = {
.driver = {
.name = "xenon-sdhci",
.of_match_table = sdhci_xenon_dt_ids,
- .pm = &sdhci_xenon_dev_pm_ops,
+ .pm = &xenon_pmops,
},
.probe = xenon_probe,
.remove = xenon_remove,
diff --git a/drivers/mmc/host/sdhci-xenon.h b/drivers/mmc/host/sdhci-xenon.h
index 593b82d7b68a..2b9b96e51261 100644
--- a/drivers/mmc/host/sdhci-xenon.h
+++ b/drivers/mmc/host/sdhci-xenon.h
@@ -89,7 +89,6 @@ struct xenon_priv {
*/
void *phy_params;
struct xenon_emmc_phy_regs *emmc_phy_regs;
- bool restore_needed;
};
int xenon_phy_adj(struct sdhci_host *host, struct mmc_ios *ios);
--
2.26.2
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