diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2018-12-11 15:10:42 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2018-12-17 08:26:24 +0100 |
| commit | bd29f58bc0611ea9ebddc4091f71a8229572eb6a (patch) | |
| tree | c1c51e20e6afbf60bcb994c89899d4be44e1185b /drivers/mmc/host/sdhci.c | |
| parent | c8073e52851477514e98a032ae70f2dc8be19d32 (diff) | |
| download | lwn-bd29f58bc0611ea9ebddc4091f71a8229572eb6a.tar.gz lwn-bd29f58bc0611ea9ebddc4091f71a8229572eb6a.zip | |
mmc: sdhci: Add quirk to disable LED control
Host controllers may not have a LED signal line, whereas the register
updates to control the non-existent LED can be relatively time consuming.
Add a quirk to disable LED control.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/sdhci.c')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 281683c93de6..5de845b6b4d0 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -349,6 +349,9 @@ static void __sdhci_led_activate(struct sdhci_host *host) { u8 ctrl; + if (host->quirks & SDHCI_QUIRK_NO_LED) + return; + ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); ctrl |= SDHCI_CTRL_LED; sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); @@ -358,6 +361,9 @@ static void __sdhci_led_deactivate(struct sdhci_host *host) { u8 ctrl; + if (host->quirks & SDHCI_QUIRK_NO_LED) + return; + ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); ctrl &= ~SDHCI_CTRL_LED; sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); @@ -387,6 +393,9 @@ static int sdhci_led_register(struct sdhci_host *host) { struct mmc_host *mmc = host->mmc; + if (host->quirks & SDHCI_QUIRK_NO_LED) + return 0; + snprintf(host->led_name, sizeof(host->led_name), "%s::", mmc_hostname(mmc)); @@ -400,6 +409,9 @@ static int sdhci_led_register(struct sdhci_host *host) static void sdhci_led_unregister(struct sdhci_host *host) { + if (host->quirks & SDHCI_QUIRK_NO_LED) + return; + led_classdev_unregister(&host->led); } |