From: Vivien Didelot Date: Mon, 5 Dec 2016 22:30:26 +0000 (-0500) Subject: net: dsa: mv88e6xxx: add helper to hardware reset X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=309eca6db96ad69470220fa12c0bdc1ee64da8af;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git 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 Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller --- 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