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| author | bertrand.cachet@heig-vd.ch <bertrand.cachet@heig-vd.ch> | 2011-11-15 03:40:53 +0000 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2011-11-22 08:39:27 +0100 |
| commit | 3c8849df5f2954944578cd2e2af31c001283dbf2 (patch) | |
| tree | 2b64cb0548aaf51c9a7e7485bc0f447e34f8be8e /drivers/net/smc911x.h | |
| parent | 27aafe988e1ee7b246c46031283113bdafcb4f75 (diff) | |
| download | u-boot-imx-3c8849df5f2954944578cd2e2af31c001283dbf2.zip u-boot-imx-3c8849df5f2954944578cd2e2af31c001283dbf2.tar.gz u-boot-imx-3c8849df5f2954944578cd2e2af31c001283dbf2.tar.bz2 | |
Improve Power Management in SMC911X driver.
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>
Diffstat (limited to 'drivers/net/smc911x.h')
| -rw-r--r-- | drivers/net/smc911x.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/net/smc911x.h b/drivers/net/smc911x.h index 8ce08a9..a290073 100644 --- a/drivers/net/smc911x.h +++ b/drivers/net/smc911x.h @@ -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); |