diff options
| author |   Vivien Didelot <vivien.didelot@savoirfairelinux.com> | 2016-12-05 17:30:26 -0500 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-12-06 11:32:28 -0500 |
| commit | 309eca6db96ad69470220fa12c0bdc1ee64da8af (patch) | |
| tree | 259d93e44e3239e3840ade542f20445fbf607a3a /drivers/net/dsa | |
| parent | net: dsa: mv88e6xxx: add helper to disable ports (diff) | |
| download | linux-dev-309eca6db96ad69470220fa12c0bdc1ee64da8af.tar.xz linux-dev-309eca6db96ad69470220fa12c0bdc1ee64da8af.zip | |
net: dsa: mv88e6xxx: add helper to hardware reset
Add an helper to toggle the eventual GPIO connected to the reset pin.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dsa')
| -rw-r--r-- | drivers/net/dsa/mv88e6xxx/chip.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c index 7cbaff721318..18605b9e60de 100644 --- a/drivers/net/dsa/mv88e6xxx/chip.c +++ b/drivers/net/dsa/mv88e6xxx/chip.c @@ -2356,6 +2356,19 @@ static void mv88e6xxx_port_bridge_leave(struct dsa_switch *ds, int port) mutex_unlock(&chip->reg_lock); } +static void mv88e6xxx_hardware_reset(struct mv88e6xxx_chip *chip) +{ + struct gpio_desc *gpiod = chip->reset; + + /* If there is a GPIO connected to the reset pin, toggle it */ + if (gpiod) { + gpiod_set_value_cansleep(gpiod, 1); + usleep_range(10000, 20000); + gpiod_set_value_cansleep(gpiod, 0); + usleep_range(10000, 20000); + } +} + static int mv88e6xxx_disable_ports(struct mv88e6xxx_chip *chip) { int i, err; @@ -2380,7 +2393,6 @@ static int mv88e6xxx_switch_reset(struct mv88e6xxx_chip *chip) { bool ppu_active = mv88e6xxx_has(chip, MV88E6XXX_FLAG_PPU_ACTIVE); u16 is_reset = (ppu_active ? 0x8800 : 0xc800); - struct gpio_desc *gpiod = chip->reset; unsigned long timeout; u16 reg; int err; @@ -2389,13 +2401,7 @@ static int mv88e6xxx_switch_reset(struct mv88e6xxx_chip *chip) if (err) return err; - /* If there is a gpio connected to the reset pin, toggle it */ - if (gpiod) { - gpiod_set_value_cansleep(gpiod, 1); - usleep_range(10000, 20000); - gpiod_set_value_cansleep(gpiod, 0); - usleep_range(10000, 20000); - } + mv88e6xxx_hardware_reset(chip); /* Reset the switch. Keep the PPU active if requested. The PPU * needs to be active to support indirect phy register access |