diff options
| author | Jerry Ray <jerry.ray@microchip.com> | 2023-01-17 21:57:00 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-01-20 09:53:13 +0100 |
| commit | de375aa860fb848eaabc76dce0af2e982630b421 (patch) | |
| tree | d9768734286346b600250006dc7a5dc1134f70af /drivers/net/dsa | |
| parent | dsa: lan9303: Add exception logic for read failure (diff) | |
| download | linux-de375aa860fb848eaabc76dce0af2e982630b421.tar.xz linux-de375aa860fb848eaabc76dce0af2e982630b421.zip | |
dsa: lan9303: write reg only if necessary
As the regmap_write() is over a slow bus that will sleep, we can speed up
the boot-up time a bit by not bothering to clear a bit that is already
clear.
Signed-off-by: Jerry Ray <jerry.ray@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dsa')
| -rw-r--r-- | drivers/net/dsa/lan9303-core.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/net/dsa/lan9303-core.c b/drivers/net/dsa/lan9303-core.c index 66466d50d015..a4decf42a002 100644 --- a/drivers/net/dsa/lan9303-core.c +++ b/drivers/net/dsa/lan9303-core.c @@ -915,8 +915,11 @@ static int lan9303_setup(struct dsa_switch *ds) if (ret) return (ret); - reg &= ~LAN9303_VIRT_SPECIAL_TURBO; - regmap_write(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, reg); + /* Clear the TURBO Mode bit if it was set. */ + if (reg & LAN9303_VIRT_SPECIAL_TURBO) { + reg &= ~LAN9303_VIRT_SPECIAL_TURBO; + regmap_write(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, reg); + } ret = lan9303_setup_tagging(chip); if (ret) |