ARM: imx: Enable imx53 low power idle

Add various functionality needed to enable a imx53 low power idle
state.  This includes adding the imx53 gpc_dvfs clock and making a
common imx5_late_init function and initializing all imx53
 MACHINE_STATE late_init calls to imx5_late_init.

Signed-off-by: Robert Lee <rob.lee@linaro.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/mach-imx/clk-imx51-imx53.c

@@ -279,6 +279,7 @@ static void __init mx5_clocks_common_init(unsigned long rate_ckil,
 	clk_register_clkdev(clk[dummy], NULL, "imx-keypad");
 	clk_register_clkdev(clk[tve_gate], NULL, "imx-tve.0");
 	clk_register_clkdev(clk[ipu_di1_gate], "di1", "imx-tve.0");
+	clk_register_clkdev(clk[gpc_dvfs], "gpc_dvfs", NULL);
 
 	/* Set SDHC parents to be PLL2 */
 	clk_set_parent(clk[esdhc_a_sel], clk[pll2_sw]);
@@ -336,7 +337,6 @@ int __init mx51_clocks_init(unsigned long rate_ckil, unsigned long rate_osc,
 	clk_register_clkdev(clk[mx51_mipi], "mipi_hsp", NULL);
 	clk_register_clkdev(clk[vpu_gate], NULL, "imx51-vpu.0");
 	clk_register_clkdev(clk[fec_gate], NULL, "imx27-fec.0");
-	clk_register_clkdev(clk[gpc_dvfs], "gpc_dvfs", NULL);
 	clk_register_clkdev(clk[ipu_gate], "bus", "imx51-ipu");
 	clk_register_clkdev(clk[ipu_di0_gate], "di0", "imx51-ipu");
 	clk_register_clkdev(clk[ipu_di1_gate], "di1", "imx51-ipu");

arch/arm/mach-imx/imx53-dt.c

@@ -147,6 +147,7 @@ DT_MACHINE_START(IMX53_DT, "Freescale i.MX53 (Device Tree Support)")
 	.handle_irq	= imx53_handle_irq,
 	.timer		= &imx53_timer,
 	.init_machine	= imx53_dt_init,
+	.init_late	= imx53_init_late,
 	.dt_compat	= imx53_dt_board_compat,
 	.restart	= mxc_restart,
 MACHINE_END

arch/arm/mach-imx/mach-mx53_ard.c

@@ -266,5 +266,6 @@ MACHINE_START(MX53_ARD, "Freescale MX53 ARD Board")
 	.handle_irq = imx53_handle_irq,
 	.timer = &mx53_ard_timer,
 	.init_machine = mx53_ard_board_init,
+	.init_late	= imx53_init_late,
 	.restart	= mxc_restart,
 MACHINE_END

arch/arm/mach-imx/mach-mx53_evk.c

@@ -174,5 +174,6 @@ MACHINE_START(MX53_EVK, "Freescale MX53 EVK Board")
 	.handle_irq = imx53_handle_irq,
 	.timer = &mx53_evk_timer,
 	.init_machine = mx53_evk_board_init,
+	.init_late	= imx53_init_late,
 	.restart	= mxc_restart,
 MACHINE_END

arch/arm/mach-imx/mach-mx53_loco.c

@@ -316,5 +316,6 @@ MACHINE_START(MX53_LOCO, "Freescale MX53 LOCO Board")
 	.handle_irq = imx53_handle_irq,
 	.timer = &mx53_loco_timer,
 	.init_machine = mx53_loco_board_init,
+	.init_late	= imx53_init_late,
 	.restart	= mxc_restart,
 MACHINE_END

arch/arm/mach-imx/mach-mx53_smd.c

@@ -163,5 +163,6 @@ MACHINE_START(MX53_SMD, "Freescale MX53 SMD Board")
 	.handle_irq = imx53_handle_irq,
 	.timer = &mx53_smd_timer,
 	.init_machine = mx53_smd_board_init,
+	.init_late	= imx53_init_late,
 	.restart	= mxc_restart,
 MACHINE_END

arch/arm/mach-imx/mm-imx5.c

@@ -223,3 +223,8 @@ void __init imx51_init_late(void)
 	mx51_neon_fixup();
 	imx51_pm_init();
 }
+
+void __init imx53_init_late(void)
+{
+	imx53_pm_init();
+}

arch/arm/mach-imx/pm-imx5.c

@@ -166,3 +166,8 @@ void __init imx51_pm_init(void)
 	if (!ret)
 		suspend_set_ops(&mx5_suspend_ops);
 }
+
+void __init imx53_pm_init(void)
+{
+	imx5_pm_common_init();
+}

arch/arm/plat-mxc/include/mach/common.h

@@ -54,6 +54,7 @@ extern void imx50_soc_init(void);
 extern void imx51_soc_init(void);
 extern void imx53_soc_init(void);
 extern void imx51_init_late(void);
+extern void imx53_init_late(void);
 extern void epit_timer_init(struct clk *timer_clk, void __iomem *base, int irq);
 extern void mxc_timer_init(struct clk *timer_clk, void __iomem *, int);
 extern int mx1_clocks_init(unsigned long fref);
@@ -146,9 +147,11 @@ extern void imx6q_clock_map_io(void);
 #ifdef CONFIG_PM
 extern void imx6q_pm_init(void);
 extern void imx51_pm_init(void);
+extern void imx53_pm_init(void);
 #else
 static inline void imx6q_pm_init(void) {}
 static inline void imx51_pm_init(void) {}
+static inline void imx53_pm_init(void) {}
 #endif
 
 #ifdef CONFIG_NEON