xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mmc: sdhci: Add quirk to disable LED control

Browse Source 
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>
This commit is contained in:
Adrian Hunter
2018-12-11 15:10:42 +02:00
committed by Ulf Hansson
parent c8073e5285
commit bd29f58bc0
2 changed files with 14 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/mmc/host/sdhci.c
View File

@@ -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);
}