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clk: imx6ul: add ethernet refclock mux support

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Add ethernet refclock mux support and set it to internal clock by
default. This configuration will not affect existing boards.

clock tree before this patch:
fec1 <- enet1_ref_125m (gate) <- enet1_ref (divider) <-,
                                                       |- pll6_enet
fec2 <- enet2_ref_125m (gate) <- enet2_ref (divider) <-´

after this patch:
fec1 <- enet1_ref_sel(mux) <- enet1_ref_125m (gate) <- ...
               `--<> enet1_ref_pad                      |- pll6_enet
fec2 <- enet2_ref_sel(mux) <- enet2_ref_125m (gate) <- ...
               `--<> enet2_ref_pad

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Acked-by: Lee Jones <lee@kernel.org>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20230131084642.709385-17-o.rempel@pengutronix.de
This commit is contained in:
Oleksij Rempel
2023-01-31 09:46:39 +01:00
committed by Abel Vesa
parent 5f82bfced6
commit 4e197ee880
3 changed files with 35 additions and 3 deletions
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6
include/linux/mfd/syscon/imx6q-iomuxc-gpr.h
View File

@@ -451,8 +451,10 @@
#define IMX6SX_GPR12_PCIE_RX_EQ_2 (0x2 << 0)
/* For imx6ul iomux gpr register field define */
#define IMX6UL_GPR1_ENET1_CLK_DIR (0x1 << 17)
#define IMX6UL_GPR1_ENET2_CLK_DIR (0x1 << 18)
#define IMX6UL_GPR1_ENET2_TX_CLK_DIR BIT(18)
#define IMX6UL_GPR1_ENET1_TX_CLK_DIR BIT(17)
#define IMX6UL_GPR1_ENET2_CLK_SEL BIT(14)
#define IMX6UL_GPR1_ENET1_CLK_SEL BIT(13)
#define IMX6UL_GPR1_ENET1_CLK_OUTPUT (0x1 << 17)
#define IMX6UL_GPR1_ENET2_CLK_OUTPUT (0x1 << 18)
#define IMX6UL_GPR1_ENET_CLK_DIR (0x3 << 17)