ARM: imx27: add a clock gate to activate SPLL clock

A clock gate is mandatory to activate SPLL clock needed, at least, for usb.
Signed-off-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou@armadeus.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/mach-imx/clk-imx27.c

@@ -62,7 +62,7 @@ static const char *clko_sel_clks[] = {
 	"32k", "usb_div", "dptc",
 };
 
-static const char *ssi_sel_clks[] = { "spll", "mpll", };
+static const char *ssi_sel_clks[] = { "spll_gate", "mpll", };
 
 enum mx27_clks {
 	dummy, ckih, ckil, mpll, spll, mpll_main2, ahb, ipg, nfc_div, per1_div,
@@ -82,7 +82,7 @@ enum mx27_clks {
 	csi_ahb_gate, brom_ahb_gate, ata_ahb_gate, wdog_ipg_gate, usb_ipg_gate,
 	uart6_ipg_gate, uart5_ipg_gate, uart4_ipg_gate, uart3_ipg_gate,
 	uart2_ipg_gate, uart1_ipg_gate, ckih_div1p5, fpm, mpll_osc_sel,
-	mpll_sel, clk_max
+	mpll_sel, spll_gate, clk_max
 };
 
 static struct clk *clk[clk_max];
@@ -104,6 +104,7 @@ int __init mx27_clocks_init(unsigned long fref)
 			ARRAY_SIZE(mpll_sel_clks));
 	clk[mpll] = imx_clk_pllv1("mpll", "mpll_sel", CCM_MPCTL0);
 	clk[spll] = imx_clk_pllv1("spll", "ckih", CCM_SPCTL0);
+	clk[spll_gate] = imx_clk_gate("spll_gate", "spll", CCM_CSCR, 1);
 	clk[mpll_main2] = imx_clk_fixed_factor("mpll_main2", "mpll", 2, 3);
 
 	if (mx27_revision() >= IMX_CHIP_REVISION_2_0) {
@@ -121,7 +122,7 @@ int __init mx27_clocks_init(unsigned long fref)
 	clk[per4_div] = imx_clk_divider("per4_div", "mpll_main2", CCM_PCDR1, 24, 6);
 	clk[vpu_sel] = imx_clk_mux("vpu_sel", CCM_CSCR, 21, 1, vpu_sel_clks, ARRAY_SIZE(vpu_sel_clks));
 	clk[vpu_div] = imx_clk_divider("vpu_div", "vpu_sel", CCM_PCDR0, 10, 6);
-	clk[usb_div] = imx_clk_divider("usb_div", "spll", CCM_CSCR, 28, 3);
+	clk[usb_div] = imx_clk_divider("usb_div", "spll_gate", CCM_CSCR, 28, 3);
 	clk[cpu_sel] = imx_clk_mux("cpu_sel", CCM_CSCR, 15, 1, cpu_sel_clks, ARRAY_SIZE(cpu_sel_clks));
 	clk[clko_sel] = imx_clk_mux("clko_sel", CCM_CCSR, 0, 5, clko_sel_clks, ARRAY_SIZE(clko_sel_clks));
 	if (mx27_revision() >= IMX_CHIP_REVISION_2_0)