Check if the low level driver supports config_dll callback function and
call it if it does. Call with dll disable before calling set_clock and
with dll enable after it.
Signed-off-by: Ashok Reddy Soma <ashok.reddy.s...@amd.com>
---
drivers/mmc/sdhci.c | 16 ++++++++++++++++
include/sdhci.h | 2 ++
2 files changed, 18 insertions(+)
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index a80ad8329a..181ab9b7cb 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -396,6 +396,14 @@ int sdhci_set_clock(struct mmc *mmc, unsigned int clock)
}
}
+ if (host->ops && host->ops->config_dll) {
+ ret = host->ops->config_dll(host, clock, false);
+ if (ret) {
+ printf("%s: Error while configuring dll\n", __func__);
+ return ret;
+ }
+ }
+
if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) {
/*
* Check if the Host Controller supports Programmable Clock
@@ -439,6 +447,14 @@ int sdhci_set_clock(struct mmc *mmc, unsigned int clock)
if (host->ops && host->ops->set_clock)
host->ops->set_clock(host, div);
+ if (host->ops && host->ops->config_dll) {
+ ret = host->ops->config_dll(host, clock, true);
+ if (ret) {
+ printf("%s: Error while configuring dll\n", __func__);
+ return ret;
+ }
+ }
+
clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN)
<< SDHCI_DIVIDER_HI_SHIFT;
diff --git a/include/sdhci.h b/include/sdhci.h
index 24b4599b85..64a3d309da 100644
--- a/include/sdhci.h
+++ b/include/sdhci.h
@@ -272,6 +272,8 @@ struct sdhci_ops {
void (*set_clock)(struct sdhci_host *host, u32 div);
int (*platform_execute_tuning)(struct mmc *host, u8 opcode);
int (*set_delay)(struct sdhci_host *host);
+ /* Callback function to set DLL clock configuration */
+ int (*config_dll)(struct sdhci_host *host, u32 clock, bool enable);
int (*deferred_probe)(struct sdhci_host *host);
/**
--
2.17.1
