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mmc: sdhci-sprd: Fix the incorrect soft reset operation when runtime resuming 

The SD host controller specification defines 3 types software reset:
software reset for data line, software reset for command line and software
reset for all. Software reset for all means this reset affects the entire
Host controller except for the card detection circuit.

In sdhci_runtime_resume_host() we always do a software "reset for all",
which causes the Spreadtrum variant controller to work abnormally after
resuming. To fix the problem, let's do a software reset for the data and
the command part, rather than "for all".

However, as sdhci_runtime_resume() is a common sdhci function and we don't
want to change the behaviour for other variants, let's introduce a new
in-parameter for it. This enables the caller to decide if a "reset for all"
shall be done or not.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Fixes: fb8bd90f83 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller")
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Baolin Wang 2019-07-25 11:14:22 +08:00 committed by Ulf Hansson
parent e21a712a96
commit c6303c5d52
10 changed files with 12 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/mmc/host/sdhci-acpi.c
View File

@ -883,7 +883,7 @@ static int sdhci_acpi_runtime_resume(struct device *dev)
sdhci_acpi_byt_setting(&c->pdev->dev);
return sdhci_runtime_resume_host(c->host);
return sdhci_runtime_resume_host(c->host, 0);
}
#endif

2
drivers/mmc/host/sdhci-esdhc-imx.c
View File

@ -1705,7 +1705,7 @@ static int sdhci_esdhc_runtime_resume(struct device *dev)
esdhc_pltfm_set_clock(host, imx_data->actual_clock);
}
err = sdhci_runtime_resume_host(host);
err = sdhci_runtime_resume_host(host, 0);
if (err)
goto disable_ipg_clk;

2
drivers/mmc/host/sdhci-of-at91.c
View File

@ -289,7 +289,7 @@ static int sdhci_at91_runtime_resume(struct device *dev)
}
out:
return sdhci_runtime_resume_host(host);
return sdhci_runtime_resume_host(host, 0);
}
#endif /* CONFIG_PM */

4
drivers/mmc/host/sdhci-pci-core.c
View File

@ -167,7 +167,7 @@ static int sdhci_pci_runtime_suspend_host(struct sdhci_pci_chip *chip)
err_pci_runtime_suspend:
while (--i >= 0)
sdhci_runtime_resume_host(chip->slots[i]->host);
sdhci_runtime_resume_host(chip->slots[i]->host, 0);
return ret;
}
@ -181,7 +181,7 @@ static int sdhci_pci_runtime_resume_host(struct sdhci_pci_chip *chip)
if (!slot)
continue;
ret = sdhci_runtime_resume_host(slot->host);
ret = sdhci_runtime_resume_host(slot->host, 0);
if (ret)
return ret;
}

2
drivers/mmc/host/sdhci-pxav3.c
View File

@ -554,7 +554,7 @@ static int sdhci_pxav3_runtime_resume(struct device *dev)
if (!IS_ERR(pxa->clk_core))
clk_prepare_enable(pxa->clk_core);
return sdhci_runtime_resume_host(host);
return sdhci_runtime_resume_host(host, 0);
}
#endif

2
drivers/mmc/host/sdhci-s3c.c
View File

@ -745,7 +745,7 @@ static int sdhci_s3c_runtime_resume(struct device *dev)
clk_prepare_enable(busclk);
if (ourhost->cur_clk >= 0)
clk_prepare_enable(ourhost->clk_bus[ourhost->cur_clk]);
ret = sdhci_runtime_resume_host(host);
ret = sdhci_runtime_resume_host(host, 0);
return ret;
}
#endif

2
drivers/mmc/host/sdhci-sprd.c
View File

@ -696,7 +696,7 @@ static int sdhci_sprd_runtime_resume(struct device *dev)
if (ret)
goto clk_disable;
sdhci_runtime_resume_host(host);
sdhci_runtime_resume_host(host, 1);
return 0;
clk_disable:

2
drivers/mmc/host/sdhci-xenon.c
View File

@ -638,7 +638,7 @@ static int xenon_runtime_resume(struct device *dev)
priv->restore_needed = false;
}
ret = sdhci_runtime_resume_host(host);
ret = sdhci_runtime_resume_host(host, 0);
if (ret)
goto out;
return 0;

4
drivers/mmc/host/sdhci.c
View File

@ -3320,7 +3320,7 @@ int sdhci_runtime_suspend_host(struct sdhci_host *host)
}
EXPORT_SYMBOL_GPL(sdhci_runtime_suspend_host);
int sdhci_runtime_resume_host(struct sdhci_host *host)
int sdhci_runtime_resume_host(struct sdhci_host *host, int soft_reset)
{
struct mmc_host *mmc = host->mmc;
unsigned long flags;
@ -3331,7 +3331,7 @@ int sdhci_runtime_resume_host(struct sdhci_host *host)
host->ops->enable_dma(host);
}
sdhci_init(host, 0);
sdhci_init(host, soft_reset);
if (mmc->ios.power_mode != MMC_POWER_UNDEFINED &&
mmc->ios.power_mode != MMC_POWER_OFF) {

2
drivers/mmc/host/sdhci.h
View File

@ -781,7 +781,7 @@ void sdhci_adma_write_desc(struct sdhci_host *host, void **desc,
int sdhci_suspend_host(struct sdhci_host *host);
int sdhci_resume_host(struct sdhci_host *host);
int sdhci_runtime_suspend_host(struct sdhci_host *host);
int sdhci_runtime_resume_host(struct sdhci_host *host);
int sdhci_runtime_resume_host(struct sdhci_host *host, int soft_reset);
#endif
void sdhci_cqe_enable(struct mmc_host *mmc);