From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To: davem@davemloft.net, kuba@kernel.org, netdev@vger.kernel.org,
linux-amlogic@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Subject: [PATCH] net: stmmac: dwmac-meson8b: fix mask definition of the m250_sel mux
Date: Sat, 5 Dec 2020 22:32:07 +0100 [thread overview]
Message-ID: <20201205213207.519341-1-martin.blumenstingl@googlemail.com> (raw)
The m250_sel mux clock uses bit 4 in the PRG_ETH0 register. Fix this by
shifting the PRG_ETH0_CLK_M250_SEL_MASK accordingly as the "mask" in
struct clk_mux expects the mask relative to the "shift" field in the
same struct.
While here, get rid of the PRG_ETH0_CLK_M250_SEL_SHIFT macro and use
__ffs() to determine it from the existing PRG_ETH0_CLK_M250_SEL_MASK
macro.
Fixes: 566e8251625304 ("net: stmmac: add a glue driver for the Amlogic Meson 8b / GXBB DWMAC")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
index dc0b8b6d180d..459ae715b33d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
@@ -30,7 +30,6 @@
#define PRG_ETH0_EXT_RMII_MODE 4
/* mux to choose between fclk_div2 (bit unset) and mpll2 (bit set) */
-#define PRG_ETH0_CLK_M250_SEL_SHIFT 4
#define PRG_ETH0_CLK_M250_SEL_MASK GENMASK(4, 4)
/* TX clock delay in ns = "8ns / 4 * tx_dly_val" (where 8ns are exactly one
@@ -155,8 +154,9 @@ static int meson8b_init_rgmii_tx_clk(struct meson8b_dwmac *dwmac)
return -ENOMEM;
clk_configs->m250_mux.reg = dwmac->regs + PRG_ETH0;
- clk_configs->m250_mux.shift = PRG_ETH0_CLK_M250_SEL_SHIFT;
- clk_configs->m250_mux.mask = PRG_ETH0_CLK_M250_SEL_MASK;
+ clk_configs->m250_mux.shift = __ffs(PRG_ETH0_CLK_M250_SEL_MASK);
+ clk_configs->m250_mux.mask = PRG_ETH0_CLK_M250_SEL_MASK >>
+ clk_configs->m250_mux.shift;
clk = meson8b_dwmac_register_clk(dwmac, "m250_sel", mux_parents,
ARRAY_SIZE(mux_parents), &clk_mux_ops,
&clk_configs->m250_mux.hw);
--
2.29.2
next reply other threads:[~2020-12-05 21:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-05 21:32 Martin Blumenstingl [this message]
2020-12-07 9:31 ` [PATCH] net: stmmac: dwmac-meson8b: fix mask definition of the m250_sel mux Jerome Brunet
2020-12-08 2:04 ` Jakub Kicinski
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20201205213207.519341-1-martin.blumenstingl@googlemail.com \
--to=martin.blumenstingl@googlemail.com \
--cc=davem@davemloft.net \
--cc=kuba@kernel.org \
--cc=linux-amlogic@lists.infradead.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).