mmc: dw_mmc: support mmc power control with regulator
This patch adds support for power regulators.
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 51ee2f5..5a614069 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -32,6 +32,7 @@
#include <linux/mmc/mmc.h>
#include <linux/mmc/dw_mmc.h>
#include <linux/bitops.h>
+#include <linux/regulator/consumer.h>
#include "dw_mmc.h"
@@ -1440,6 +1441,13 @@
}
#endif /* CONFIG_MMC_DW_IDMAC */
+ host->vmmc = regulator_get(mmc_dev(mmc), "vmmc");
+ if (IS_ERR(host->vmmc)) {
+ printk(KERN_INFO "%s: no vmmc regulator found\n", mmc_hostname(mmc));
+ host->vmmc = NULL;
+ } else
+ regulator_enable(host->vmmc);
+
if (dw_mci_get_cd(mmc))
set_bit(DW_MMC_CARD_PRESENT, &slot->flags);
else
@@ -1704,6 +1712,12 @@
host->sg_cpu, host->sg_dma);
iounmap(host->regs);
+ if (host->vmmc) {
+ regulator_disable(host->vmmc);
+ regulator_put(host->vmmc);
+ }
+
+
err_freehost:
kfree(host);
return ret;
@@ -1735,6 +1749,11 @@
if (host->use_dma && host->dma_ops->exit)
host->dma_ops->exit(host);
+ if (host->vmmc) {
+ regulator_disable(host->vmmc);
+ regulator_put(host->vmmc);
+ }
+
iounmap(host->regs);
kfree(host);
@@ -1750,6 +1769,9 @@
int i, ret;
struct dw_mci *host = platform_get_drvdata(pdev);
+ if (host->vmmc)
+ regulator_enable(host->vmmc);
+
for (i = 0; i < host->num_slots; i++) {
struct dw_mci_slot *slot = host->slot[i];
if (!slot)
@@ -1765,6 +1787,9 @@
}
}
+ if (host->vmmc)
+ regulator_disable(host->vmmc);
+
return 0;
}
