The tuning of some platforms may not follow the standard host control
spec v3.0, e.g. Freescale uSDHC on i.MX6Q/DL.
Add a hook here to allow execute platform specific tuning instead of
standard host controller tuning.
Signed-off-by: Dong Aisheng <b29396@xxxxxxxxxxxxx>
---
drivers/mmc/host/sdhci.c | 8 ++++++++
drivers/mmc/host/sdhci.h | 1 +
2 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index dd2c083..2890cfd 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1875,6 +1875,14 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
return 0;
}
+ if (host->ops->platform_execute_tuning) {
+ spin_unlock(&host->lock);
+ enable_irq(host->irq);
+ err = host->ops->platform_execute_tuning(host, opcode);
+ sdhci_runtime_pm_put(host);
+ return err;
+ }
+
sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
/*
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index b037f18..976c14b 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -288,6 +288,7 @@ struct sdhci_ops {
unsigned int (*get_ro)(struct sdhci_host *host);
void (*platform_reset_enter)(struct sdhci_host *host, u8 mask);
void (*platform_reset_exit)(struct sdhci_host *host, u8 mask);
+ int (*platform_execute_tuning)(struct sdhci_host *host, u32 opcode);
int (*set_uhs_signaling)(struct sdhci_host *host, unsigned int uhs);
void (*hw_reset)(struct sdhci_host *host);
void (*platform_suspend)(struct sdhci_host *host);
--
1.7.1
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