This patch adds support to disable clock if clk_disable
was set and then enable or set clock if the clock was changed
or clock was disabled when clock needs to be enabled.
Signed-off-by: Siva Durga Prasad Paladugu <siva...@xilinx.com>
---
drivers/mmc/sdhci.c | 7 ++++++-
include/sdhci.h | 1 +
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index e2ddf5d..2bd721f 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -437,8 +437,13 @@ static int sdhci_set_ios(struct mmc *mmc)
if (host->ops && host->ops->set_control_reg)
host->ops->set_control_reg(host);
- if (mmc->clock != host->clock)
+ if ((mmc->clock != host->clock || host->clk_disabled) &&
+ !mmc->clk_disable)
sdhci_set_clock(mmc, mmc->clock);
+ if (mmc->clk_disable) {
+ sdhci_set_clock(mmc, 0);
+ host->clk_disabled = true;
+ }
/* Set bus width */
ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
diff --git a/include/sdhci.h b/include/sdhci.h
index 7e84012..4fc4140 100644
--- a/include/sdhci.h
+++ b/include/sdhci.h
@@ -259,6 +259,7 @@ struct sdhci_host {
uint voltages;
struct mmc_config cfg;
+ bool clk_disabled;
};
#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
--
2.7.4
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