lkml.org 
[lkml]   [2021]   [Jun]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH net-next 3/6] net: ipa: disable misc clock gating for IPA v3.1
Date
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>
---
drivers/net/ipa/ipa_main.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c
index f82130db32f6d..20a83c7f671f3 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);

--
2.27.0
\
 
 \ /
  Last update: 2021-06-21 20:15    [W:0.089 / U:0.112 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site