From: Bruce Allan Date: Wed, 6 Mar 2013 09:02:41 +0000 (+0000) Subject: e1000e: fix LED blink logic for designs with LEDs driven by cathode X-Git-Tag: v5.15~20166^2~288^2~9 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=86a80eab8ced2454bae954b681797c692afe2ea2;p=platform%2Fkernel%2Flinux-starfive.git e1000e: fix LED blink logic for designs with LEDs driven by cathode When the LEDs are driven by cathode, the bit logic is reversed. Use the LED Invert bit to invert the logic. Cleanup use of a magic number and change the for loop increment to reduce the number of shifts. Signed-off-by: Bruce Allan Tested-by: Jeff Pieper Signed-off-by: Jeff Kirsher --- diff --git a/drivers/net/ethernet/intel/e1000e/mac.c b/drivers/net/ethernet/intel/e1000e/mac.c index b25cc43..2480c10 100644 --- a/drivers/net/ethernet/intel/e1000e/mac.c +++ b/drivers/net/ethernet/intel/e1000e/mac.c @@ -1600,15 +1600,28 @@ s32 e1000e_blink_led_generic(struct e1000_hw *hw) ledctl_blink = E1000_LEDCTL_LED0_BLINK | (E1000_LEDCTL_MODE_LED_ON << E1000_LEDCTL_LED0_MODE_SHIFT); } else { - /* set the blink bit for each LED that's "on" (0x0E) - * in ledctl_mode2 + /* Set the blink bit for each LED that's "on" (0x0E) + * (or "off" if inverted) in ledctl_mode2. The blink + * logic in hardware only works when mode is set to "on" + * so it must be changed accordingly when the mode is + * "off" and inverted. */ ledctl_blink = hw->mac.ledctl_mode2; - for (i = 0; i < 4; i++) - if (((hw->mac.ledctl_mode2 >> (i * 8)) & 0xFF) == - E1000_LEDCTL_MODE_LED_ON) - ledctl_blink |= (E1000_LEDCTL_LED0_BLINK << - (i * 8)); + for (i = 0; i < 32; i += 8) { + u32 mode = (hw->mac.ledctl_mode2 >> i) & + E1000_LEDCTL_LED0_MODE_MASK; + u32 led_default = hw->mac.ledctl_default >> i; + + if ((!(led_default & E1000_LEDCTL_LED0_IVRT) && + (mode == E1000_LEDCTL_MODE_LED_ON)) || + ((led_default & E1000_LEDCTL_LED0_IVRT) && + (mode == E1000_LEDCTL_MODE_LED_OFF))) { + ledctl_blink &= + ~(E1000_LEDCTL_LED0_MODE_MASK << i); + ledctl_blink |= (E1000_LEDCTL_LED0_BLINK | + E1000_LEDCTL_MODE_LED_ON) << i; + } + } } ew32(LEDCTL, ledctl_blink);