ARM: OMAP: DSPGW: set autoidle for dsp and mailbox

Add dsp clock autoidle(DSP_FCLK, DSP_ICLK, INT_D_FCLK, INT_D_ICLK).
which are controled together by auto-control mode.
Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com>

arch/arm/plat-omap/dsp/dsp_common.c

@@ -305,6 +305,8 @@ static int __init omap_dsp_init(void)
 		return -ENODEV;
 	}
 
+	dsp_clk_autoidle();
+
 #if defined(CONFIG_ARCH_OMAP1)
 	dsp_ck_handle = clk_get(NULL, "dsp_ck");
 	if (IS_ERR(dsp_ck_handle)) {

arch/arm/plat-omap/dsp/dsp_common.h

@@ -154,4 +154,16 @@ void dsp_register_mem_cb(int (*req_cb)(void), void (*rel_cb)(void));
 void dsp_unregister_mem_cb(void);
 #endif
 
+#if defined(CONFIG_ARCH_OMAP1)
+static inline void dsp_clk_autoidle(void) {}
+#elif defined(CONFIG_ARCH_OMAP2)
+static inline void dsp_clk_autoidle(void)
+{
+	/*XXX should be handled in mach-omap[1,2] XXX*/
+	PM_PWSTCTRL_DSP = (1 << 18) | (1 << 0);
+	CM_AUTOIDLE_DSP |= (1 << 1);
+	CM_CLKSTCTRL_DSP |= (1 << 0);
+}
+#endif
+
 #endif /* DRIVER_DSP_COMMON_H */