From: Easwar Hariharan <easwar.hariharan@xxxxxxxxx>
The FLR on driver load asserts the QSFP reset pin and the driver does
not deassert it after. This patch allows the external QSFP cable to exit
reset by writing 1 to all the QSFP pins.
Reviewed-by: Dean Luick <dean.luick@xxxxxxxxx>
Signed-off-by: Easwar Hariharan <easwar.hariharan@xxxxxxxxx>
Signed-off-by: Jubin John <jubin.john@xxxxxxxxx>
---
drivers/staging/rdma/hfi1/chip.c | 13 +++++--------
1 files changed, 5 insertions(+), 8 deletions(-)
diff --git a/drivers/staging/rdma/hfi1/chip.c b/drivers/staging/rdma/hfi1/chip.c
index e489819..e309828 100644
--- a/drivers/staging/rdma/hfi1/chip.c
+++ b/drivers/staging/rdma/hfi1/chip.c
@@ -9929,19 +9929,16 @@ static void init_chip(struct hfi1_devdata *dd)
setextled(dd, 0);
/*
* Clear the QSFP reset.
- * A0 leaves the out lines floating on power on, then on an FLR
- * enforces a 0 on all out pins. The driver does not touch
+ * An FLR enforces a 0 on all out pins. The driver does not touch
* ASIC_QSFPn_OUT otherwise. This leaves RESET_N low and
- * anything plugged constantly in reset, if it pays attention
+ * anything plugged constantly in reset, if it pays attention
* to RESET_N.
- * A prime example of this is SiPh. For now, set all pins high.
+ * Prime examples of this are optical cables. Set all pins high.
* I2CCLK and I2CDAT will change per direction, and INT_N and
* MODPRS_N are input only and their value is ignored.
*/
- if (is_a0(dd)) {
- write_csr(dd, ASIC_QSFP1_OUT, 0x1f);
- write_csr(dd, ASIC_QSFP2_OUT, 0x1f);
- }
+ write_csr(dd, ASIC_QSFP1_OUT, 0x1f);
+ write_csr(dd, ASIC_QSFP2_OUT, 0x1f);
}
static void init_early_variables(struct hfi1_devdata *dd)
--
1.7.1
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