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Improve Power Management in SMC911X driver.

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device is already in *normal* (D0) mode => it doesn't need to be wake-up.

With this patch, we only wake-up (writing on TEST_BYTE register) if PM_MODE
bits of PM_CTRL register is in sleep (D1/D2) mode.

Signed-off-by: Bertrand Cachet <bertrand.cachet@heig-vd.ch>
This commit is contained in:
bertrand.cachet@heig-vd.ch 2011-11-15 03:40:53 +00:00 committed by Stefano Babic
parent 27aafe988e
commit 3c8849df5f
1 changed files with 5 additions and 2 deletions
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7
drivers/net/smc911x.h
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@ -471,8 +471,11 @@ static void smc911x_reset(struct eth_device *dev)
{
int timeout;
/* Take out of PM setting first */
if (smc911x_reg_read(dev, PMT_CTRL) & PMT_CTRL_READY) {
/*
* Take out of PM setting first
* Device is already wake up if PMT_CTRL_READY bit is set
*/
if ((smc911x_reg_read(dev, PMT_CTRL) & PMT_CTRL_READY) == 0) {
/* Write to the bytetest will take out of powerdown */
smc911x_reg_write(dev, BYTE_TEST, 0x0);