Some soc/platform need specific handling for signal voltage
switch. For example, mmp2/mmp3 need to set the AIB IO domain
control register accordingly.
Use regulator notifier to do this.
Signed-off-by: Philip Rakity <prakity@xxxxxxxxxxx>
Signed-off-by: Kevin Liu <kliu5@xxxxxxxxxxx>
---
drivers/mmc/host/sdhci.c | 4 ++++
include/linux/mmc/sdhci.h | 1 +
2 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 7084a1c..4aa2fb8 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2923,6 +2923,8 @@ int sdhci_add_host(struct sdhci_host *host)
caps[1] &= ~(SDHCI_SUPPORT_SDR104 |
SDHCI_SUPPORT_SDR50 |
SDHCI_SUPPORT_DDR50);
+ if (host->nb_vqmmc)
+ regulator_register_notifier(host->vqmmc, host->nb_vqmmc);
}
if (host->quirks2 & SDHCI_QUIRK2_NO_1_8_V)
@@ -3250,6 +3252,8 @@ void sdhci_remove_host(struct sdhci_host *host, int dead)
}
if (host->vqmmc) {
+ if (host->nb_vqmmc)
+ regulator_unregister_notifier(host->vqmmc, host->nb_vqmmc);
regulator_disable(host->vqmmc);
regulator_put(host->vqmmc);
}
diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h
index b838ffc..dbb0a7e 100644
--- a/include/linux/mmc/sdhci.h
+++ b/include/linux/mmc/sdhci.h
@@ -103,6 +103,7 @@ struct sdhci_host {
struct regulator *vmmc; /* Power regulator (vmmc) */
struct regulator *vqmmc; /* Signaling regulator (vccq) */
+ struct notifier_block *nb_vqmmc; /* Regulator notifier for vccq */
/* Internal data */
struct mmc_host *mmc; /* MMC structure */
--
1.7.0.4
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