+ [email protected] On 20/01/14 08:15, Adrian Hunter wrote: > Ping? > > On 13/01/14 09:49, Adrian Hunter wrote: >> A host controller for a SD card may need a GPIO >> for card detect in order to wake up from runtime >> suspend when a card is inserted. If that GPIO is >> not configured, then the host controller will not >> wake up. Fix that for the affected devices by not >> enabling runtime PM unless the GPIO is successfully >> set up. >> >> This affects BYT sd card host controller which had >> runtime PM enabled from v3.11. For completeness, >> the MFD sd card host controller is flagged also. >> >> The original patch before rebasing (see link below) >> was tested on v3.11.10 and v3.12.4 although the >> patch applied with some offsets and fuzz. The >> original patch is here: >> >> http://marc.info/?l=linux-mmc&m=138676702327057) was tested on v3.11.10 >> and v3.12.4 >> >> Signed-off-by: Adrian Hunter <[email protected]> >> --- >> >> V3: Update comments to reflect that the original patch >> applies to stable trees whereas the rebased patch does >> not. >> >> V2: Rebased >> >> drivers/mmc/host/sdhci-pci.c | 10 ++++++++++ >> drivers/mmc/host/sdhci-pci.h | 1 + >> 2 files changed, 11 insertions(+) >> >> diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c >> index c1a7f31..d520366 100644 >> --- a/drivers/mmc/host/sdhci-pci.c >> +++ b/drivers/mmc/host/sdhci-pci.c >> @@ -225,6 +225,7 @@ static const struct sdhci_pci_fixes >> sdhci_intel_mrst_hc1_hc2 = { >> static const struct sdhci_pci_fixes sdhci_intel_mfd_sd = { >> .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC, >> .allow_runtime_pm = true, >> + .own_cd_for_runtime_pm = true, >> }; >> >> static const struct sdhci_pci_fixes sdhci_intel_mfd_sdio = { >> @@ -289,6 +290,7 @@ static const struct sdhci_pci_fixes sdhci_intel_byt_sdio >> = { >> static const struct sdhci_pci_fixes sdhci_intel_byt_sd = { >> .quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON, >> .allow_runtime_pm = true, >> + .own_cd_for_runtime_pm = true, >> }; >> >> /* Define Host controllers for Intel Merrifield platform */ >> @@ -1370,6 +1372,14 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot( >> >> sdhci_pci_add_own_cd(slot); >> >> + /* >> + * Check if the chip needs a separate GPIO for card detect to wake up >> + * from runtime suspend. If it is not there, don't allow runtime PM. >> + * Note sdhci_pci_add_own_cd() sets slot->cd_gpio to -EINVAL on failure. >> + */ >> + if (chip->fixes->own_cd_for_runtime_pm && !gpio_is_valid(slot->cd_gpio)) >> + chip->allow_runtime_pm = false; >> + >> return slot; >> >> remove: >> diff --git a/drivers/mmc/host/sdhci-pci.h b/drivers/mmc/host/sdhci-pci.h >> index 0347804..6d71871 100644 >> --- a/drivers/mmc/host/sdhci-pci.h >> +++ b/drivers/mmc/host/sdhci-pci.h >> @@ -39,6 +39,7 @@ struct sdhci_pci_fixes { >> unsigned int quirks; >> unsigned int quirks2; >> bool allow_runtime_pm; >> + bool own_cd_for_runtime_pm; >> >> int (*probe) (struct sdhci_pci_chip *); >> >> > > >
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