| Message ID | 20201205213207.519341-1-martin.blumenstingl@googlemail.com |
|---|---|
| State | New |
| Headers | show |
| Series | net: stmmac: dwmac-meson8b: fix mask definition of the m250_sel mux | expand |
On Sat 05 Dec 2020 at 22:32, Martin Blumenstingl <martin.blumenstingl@googlemail.com> wrote: > 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> Reviewed-by: Jerome Brunet <jbrunet@baylibre.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);
On Mon, 07 Dec 2020 10:31:46 +0100 Jerome Brunet wrote: > > 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> > > Reviewed-by: Jerome Brunet <jbrunet@baylibre.com> Applied, thanks!
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);
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(-)