Heiko, 在 2016年02月21日 10:26, Heiko Stuebner 写道:
Hi Caesar, Xing,Am Dienstag, 2. Februar 2016, 11:48:19 schrieb Caesar Wang:From: zhengxing <zhengx...@rock-chips.com> In the emac driver, we need to refer HCLK_MAC since there are only 3PLLs (APLL/GPLL/DPLL) on the rk3036, most clock are under the GPLL, and it is unable to provide the accurate rate for mac_ref which need to 50MHz probability, we should let it under the DPLL and are able to set the freq which integer multiples of 50MHz, so we add these emac node for reference. Signed-off-by: Xing Zheng <zhengx...@rock-chips.com> Signed-off-by: Caesar Wang <w...@rock-chips.com>[...]--- a/drivers/clk/rockchip/clk-rk3036.c +++ b/drivers/clk/rockchip/clk-rk3036.c @@ -343,8 +343,11 @@ static struct rockchip_clk_branch rk3036_clk_branches[] __initdata = { RK2928_CLKSEL_CON(16), 0, 2, MFLAGS, 2, 5, DFLAGS, RK2928_CLKGATE_CON(10), 5, GFLAGS), - COMPOSITE_NOGATE(0, "mac_pll_src", mux_pll_src_3plls_p, 0, - RK2928_CLKSEL_CON(21), 0, 2, MFLAGS, 9, 5, DFLAGS), + MUX(SCLK_MACPLL, "mac_pll_pre", mux_pll_src_3plls_p, 0, + RK2928_CLKSEL_CON(21), 0, 2, MFLAGS), + DIV(0, "mac_pll_src", "mac_pll_pre", 0, + RK2928_CLKSEL_CON(21), 9, 5, DFLAGS), +CLK_SET_RATE_NO_REPARENT should do the trick as well. And the whole hclk + clkid part should be separate patches. I took the liberty of splitting them already in [0] to see if I could get the emac running on my kylin board. Probing emac + phy does suceed, but there is no link-detection. Building your kylin-develop4.4 branch [1] results in the same (aka no transmission). Only with the original uboot + 4.1-based kernel that was already on the device did I manage to get a network connection.
I guess you need apply the uboot patch[0]. patch[0]: http://lists.denx.de/pipermail/u-boot/2016-February/245814.html or get the uboot from rockchip github: https://github.com/rockchip-linux/u-boot/commits/rk3036
Is there some additional setup missing somewhere? Heiko [0] https://github.com/mmind/linux-rockchip/commits/tmp/rk3036-emac The 3 additional patches are not strictly necessary there. [1] https://github.com/rockchip-linux/kernel/tree/kylin-develop4.4
The lastest kylin-develop.4.4.y from my github: https://github.com/Caesar-github/rockchip/tree/kylin/develop-4.4.y
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-- Thanks, Caesar