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mmc: sdhci: Drop redundant code for SDIO IRQs 

Nowadays sdhci prevents runtime suspend when SDIO IRQs are enabled.

However, some variants such as sdhci-esdhc-imx's, tries to allow runtime
suspend while having the SDIO IRQs enabled, but without supporting remote
wakeups. This support is a bit questionable, especially if the host device
have a PM domain attached that can be power gated, but more importantly,
the code have also become redundant (which was not the case when it was
introduced).

Rather than keeping the redundant code around, let's drop it and leave this
to be revisited later on.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Ulf Hansson 2019-09-08 12:12:35 +02:00
parent a84ad3242e
commit af5d2b7b0d
3 changed files with 16 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
drivers/mmc/host/sdhci-esdhc-imx.c
View File

@ -1666,12 +1666,10 @@ static int sdhci_esdhc_runtime_suspend(struct device *dev)
if (host->tuning_mode != SDHCI_TUNING_MODE_3)
mmc_retune_needed(host->mmc);
if (!sdhci_sdio_irq_enabled(host)) {
imx_data->actual_clock = host->mmc->actual_clock;
esdhc_pltfm_set_clock(host, 0);
clk_disable_unprepare(imx_data->clk_per);
clk_disable_unprepare(imx_data->clk_ipg);
}
imx_data->actual_clock = host->mmc->actual_clock;
esdhc_pltfm_set_clock(host, 0);
clk_disable_unprepare(imx_data->clk_per);
clk_disable_unprepare(imx_data->clk_ipg);
clk_disable_unprepare(imx_data->clk_ahb);
if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS)
@ -1695,15 +1693,15 @@ static int sdhci_esdhc_runtime_resume(struct device *dev)
if (err)
goto remove_pm_qos_request;
if (!sdhci_sdio_irq_enabled(host)) {
err = clk_prepare_enable(imx_data->clk_per);
if (err)
goto disable_ahb_clk;
err = clk_prepare_enable(imx_data->clk_ipg);
if (err)
goto disable_per_clk;
esdhc_pltfm_set_clock(host, imx_data->actual_clock);
}
err = clk_prepare_enable(imx_data->clk_per);
if (err)
goto disable_ahb_clk;
err = clk_prepare_enable(imx_data->clk_ipg);
if (err)
goto disable_per_clk;
esdhc_pltfm_set_clock(host, imx_data->actual_clock);
err = sdhci_runtime_resume_host(host, 0);
if (err)
@ -1715,11 +1713,9 @@ static int sdhci_esdhc_runtime_resume(struct device *dev)
return err;
disable_ipg_clk:
if (!sdhci_sdio_irq_enabled(host))
clk_disable_unprepare(imx_data->clk_ipg);
clk_disable_unprepare(imx_data->clk_ipg);
disable_per_clk:
if (!sdhci_sdio_irq_enabled(host))
clk_disable_unprepare(imx_data->clk_per);
clk_disable_unprepare(imx_data->clk_per);
disable_ahb_clk:
clk_disable_unprepare(imx_data->clk_ahb);
remove_pm_qos_request:

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

@ -3048,7 +3048,7 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id)
spin_lock(&host->lock);
if (host->runtime_suspended && !sdhci_sdio_irq_enabled(host)) {
if (host->runtime_suspended) {
spin_unlock(&host->lock);
return IRQ_NONE;
}

5
drivers/mmc/host/sdhci.h
View File

@ -753,11 +753,6 @@ static inline void sdhci_read_caps(struct sdhci_host *host)
__sdhci_read_caps(host, NULL, NULL, NULL);
}
static inline bool sdhci_sdio_irq_enabled(struct sdhci_host *host)
{
return !!(host->flags & SDHCI_SDIO_IRQ_ENABLED);
}
u16 sdhci_calc_clk(struct sdhci_host *host, unsigned int clock,
unsigned int *actual_clock);
void sdhci_set_clock(struct sdhci_host *host, unsigned int clock);