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imx8: enable/expose tmu

--- a/sys/src/9/imx8/ccm.c

+++ b/sys/src/9/imx8/ccm.c

@@ -760,6 +760,8 @@

 	{ "pcie_mem.mstr_axi_clk", MAIN_AXI_CLK_ROOT, 37 },

 	{ "pcie_mem.slv_axi_clk", MAIN_AXI_CLK_ROOT, 37 },

+	{ "tmu.clk", IPG_CLK_ROOT, 98 },

+

 	{ "pcie2_clk_rst.auxclk", PCIE2_AUX_CLK_ROOT, 100 },

 	{ "pcie2_clk_rst.mstr_axi_clk", MAIN_AXI_CLK_ROOT, 100 },

 	{ "pcie2_clk_rst.slv_axi_clk", MAIN_AXI_CLK_ROOT, 100 },

--- a/sys/src/9/imx8/main.c

+++ b/sys/src/9/imx8/main.c

@@ -251,6 +251,20 @@

 	iprint("cpu%d: %dMHz ARM Cortex A53\n", m->machno, m->cpumhz);

 }

+static void

+tmuinit(void)

+{

+	Physseg seg;

+

+	setclkgate("tmu.clk", 1);

+	memset(&seg, 0, sizeof(seg));

+	seg.attr = SG_PHYSICAL | SG_DEVICE | SG_NOEXEC;

+	seg.name = "tmu";

+	seg.pa = VIRTIO + 0x260000 - KZERO;

+	seg.size = BY2PG;

+	addphysseg(&seg);

+}

+

 void

 main(void)

 {

@@ -289,6 +303,7 @@

 	links();

 	chandevreset();

 	lcdinit();

+	tmuinit();

 	userinit();

 	mpinit();

 	mmu0clear((uintptr*)L1);