diff options
| author | Alex Elder <elder@linaro.org> | 2021-06-21 12:56:24 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-06-21 12:30:59 -0700 |
| commit | 3833d0abd2c5827fb50a6cc9f1654d7ea0b64b2c (patch) | |
| tree | 7a7e3bf9605412be755240b964398de7fd5b3709 | |
| parent | c31d73494fa5016596f0b36aeb3e388160c9c473 (diff) | |
| download | linux-3833d0abd2c5827fb50a6cc9f1654d7ea0b64b2c.tar.bz2 | |
net: ipa: disable misc clock gating for IPA v3.1
For IPA v3.1, a workaround is needed to disable gating on a MISC
clock. I have no further explanation, but this is what the
downstream code (msm-4.4) does.
This was suggested in a patch from AngeloGioacchino Del Regno.
Link: https://lore.kernel.org/netdev/20210211175015.200772-2-angelogioacchino.delregno@somainline.org
Signed-off-by: Alex Elder <elder@linaro.org>
Acked-by: AngeloGioacchino Del Regno
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ipa/ipa_main.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c index f82130db32f6..20a83c7f671f 100644 --- a/drivers/net/ipa/ipa_main.c +++ b/drivers/net/ipa/ipa_main.c @@ -400,16 +400,20 @@ static void ipa_hardware_config(struct ipa *ipa, const struct ipa_data *data) /* Implement some hardware workarounds */ if (version >= IPA_VERSION_4_0 && version < IPA_VERSION_4_5) { - /* Enable open global clocks (not needed for IPA v4.5) */ - val = GLOBAL_FMASK; - val |= GLOBAL_2X_CLK_FMASK; - iowrite32(val, ipa->reg_virt + IPA_REG_CLKON_CFG_OFFSET); - /* Disable PA mask to allow HOLB drop */ val = ioread32(ipa->reg_virt + IPA_REG_TX_CFG_OFFSET); val &= ~PA_MASK_EN_FMASK; iowrite32(val, ipa->reg_virt + IPA_REG_TX_CFG_OFFSET); + + /* Enable open global clocks in the CLKON configuration */ + val = GLOBAL_FMASK | GLOBAL_2X_CLK_FMASK; + } else if (version == IPA_VERSION_3_1) { + val = MISC_FMASK; /* Disable MISC clock gating */ + } else { + val = 0; /* No CLKON configuration needed */ } + if (val) + iowrite32(val, ipa->reg_virt + IPA_REG_CLKON_CFG_OFFSET); ipa_hardware_config_comp(ipa); |