[PATCH v2 8/9] net: stmmac: restore pinstate in pm resume.

From: srinivas.kandagatla
Date: Thu Jan 16 2014 - 05:58:43 EST

From: Srinivas Kandagatla <srinivas.kandagatla@xxxxxx>

This patch adds code to restore default pinstate of the pins when it
comes back from low power state. Without this patch the state of the
pins would be unknown and the driver would not work.

This patch also adds code to put the pins in to sleep state when the
driver enters low power state.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxx>
Acked-by: Giuseppe Cavallaro <peppe.cavallaro@xxxxxx>
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index c1298a0..df7d8d6 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -43,6 +43,7 @@
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/prefetch.h>
+#include <linux/pinctrl/consumer.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
@@ -2864,6 +2865,7 @@ int stmmac_suspend(struct net_device *ndev)
priv->hw->mac->pmt(priv->ioaddr, priv->wolopts);
else {
stmmac_set_mac(priv->ioaddr, false);
+ pinctrl_pm_select_sleep_state(priv->device);
/* Disable clock in case of PWM is off */
@@ -2890,6 +2892,7 @@ int stmmac_resume(struct net_device *ndev)
if (device_may_wakeup(priv->device)) {
priv->hw->mac->pmt(priv->ioaddr, 0);
} else {
+ pinctrl_pm_select_default_state(priv->device);
/* enable the clk prevously disabled */
/* reset the phy so that it's ready */

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/