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reform: move SAI iomux/clock initialization into probe()

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

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

@@ -392,17 +392,6 @@

 	adev->status = saistatus;

 	adev->ctl = saictl;

-	intrenable(IRQsai2, saiinterrupt, ctlr, BUSUNKNOWN, "sai2");

-	ctlr->hp = gpioin(GPIO_PIN(4, 21));

-	gpiointrenable(GPIO_PIN(4, 21), GpioEdge, jacksense, ctlr);

-	saireset(ctlr);

-

-	return 0;

-}

-

-void

-sailink(void)

-{

 	iomuxpad("pad_sai2_rxfs", "gpio4_io21", "SION ~LVTTL HYS ~PUE ~ODE FAST 45_OHM");

 	iomuxpad("pad_sai2_rxc", "sai2_rx_bclk", "~LVTTL HYS PUE ~ODE FAST 45_OHM");

 	iomuxpad("pad_sai2_rxd0", "sai2_rx_data0", "~LVTTL HYS PUE ~ODE FAST 45_OHM");

@@ -414,5 +403,16 @@

 	setclkrate("sai2.ipg_clk", "audio_pll1_clk", 25*Mhz);

 	setclkgate("sai2.ipg_clk", 1);

+	intrenable(IRQsai2, saiinterrupt, ctlr, BUSUNKNOWN, "sai2");

+	ctlr->hp = gpioin(GPIO_PIN(4, 21));

+	gpiointrenable(GPIO_PIN(4, 21), GpioEdge, jacksense, ctlr);

+	saireset(ctlr);

+

+	return 0;

+}

+

+void

+sailink(void)

+{

 	addaudiocard("sai", saiprobe);

 }