Merge tag 'omap-for-v3.12/prcm-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into late/all

From Tony Lindgren:
OMAP PRCM and hwmod fixes and improvments via Paul Walmsley <paul@pwsan.com>:

Various OMAP PRCM & hwmod fixes and improvements.  Notable changes
include:

- a fix for OMAP4 PLL locking to avoid a bootloader dependency that
  causes nasty log spew on startup

- AM33xx DEBUGSS support fixes in hwmod data

- OMAP5 mailbox support in hwmod data

Basic test logs are here:

http://www.pwsan.com/omap/testlogs/prcm_a_for_v3.12/20130823125002/

Note that the 3530 failure is due to the mysterious transient serial
issue affecting 3530 for several releases now, which causes a log
parsing failure.  PM still seems to work.

* tag 'omap-for-v3.12/prcm-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: OMAP: AM33xx: clock: Add RNG clock data
  ARM: OMAP: TI81XX: add always-on powerdomain for TI81XX
  ARM: OMAP4: clock: Lock PLLs in the right sequence
  ARM: OMAP: AM33XX: hwmod: Add hwmod data for debugSS
  ARM: OMAP2+: Only write the sysconfig on idle when necessary
  ARM: OMAP5: hwmod data: Add mailbox data

Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/mach-omap2/cclock33xx_data.c

@@ -421,6 +421,10 @@ static struct clk aes0_fck;
 DEFINE_STRUCT_CLK_HW_OMAP(aes0_fck, NULL);
 DEFINE_STRUCT_CLK(aes0_fck, dpll_core_ck_parents, clk_ops_null);
 
+static struct clk rng_fck;
+DEFINE_STRUCT_CLK_HW_OMAP(rng_fck, NULL);
+DEFINE_STRUCT_CLK(rng_fck, dpll_core_ck_parents, clk_ops_null);
+
 /*
  * Modules clock nodes
  *
@@ -966,6 +970,7 @@ static struct omap_clk am33xx_clks[] = {
 	CLK(NULL,	"smartreflex1_fck",	&smartreflex1_fck),
 	CLK(NULL,	"sha0_fck",		&sha0_fck),
 	CLK(NULL,	"aes0_fck",		&aes0_fck),
+	CLK(NULL,	"rng_fck",		&rng_fck),
 	CLK(NULL,	"timer1_fck",		&timer1_fck),
 	CLK(NULL,	"timer2_fck",		&timer2_fck),
 	CLK(NULL,	"timer3_fck",		&timer3_fck),

arch/arm/mach-omap2/cclock44xx_data.c

@@ -1706,6 +1706,18 @@ int __init omap4xxx_clk_init(void)
 
 	omap2_clk_disable_autoidle_all();
 
+	/*
+	 * A set rate of ABE DPLL inturn triggers a set rate of USB DPLL
+	 * when its in bypass. So always lock USB before ABE DPLL.
+	 */
+	/*
+	 * Lock USB DPLL on OMAP4 devices so that the L3INIT power
+	 * domain can transition to retention state when not in use.
+	 */
+	rc = clk_set_rate(&dpll_usb_ck, OMAP4_DPLL_USB_DEFFREQ);
+	if (rc)
+		pr_err("%s: failed to configure USB DPLL!\n", __func__);
+
 	/*
 	 * On OMAP4460 the ABE DPLL fails to turn on if in idle low-power
 	 * state when turning the ABE clock domain. Workaround this by
@@ -1718,13 +1730,5 @@ int __init omap4xxx_clk_init(void)
 	if (rc)
 		pr_err("%s: failed to configure ABE DPLL!\n", __func__);
 
-	/*
-	 * Lock USB DPLL on OMAP4 devices so that the L3INIT power
-	 * domain can transition to retention state when not in use.
-	 */
-	rc = clk_set_rate(&dpll_usb_ck, OMAP4_DPLL_USB_DEFFREQ);
-	if (rc)
-		pr_err("%s: failed to configure USB DPLL!\n", __func__);
-
 	return 0;
 }

arch/arm/mach-omap2/omap_hwmod.c

@@ -1405,7 +1405,9 @@ static void _enable_sysc(struct omap_hwmod *oh)
 	    (sf & SYSC_HAS_CLOCKACTIVITY))
 		_set_clockactivity(oh, oh->class->sysc->clockact, &v);
 
-	_write_sysconfig(v, oh);
+	/* If the cached value is the same as the new value, skip the write */
+	if (oh->_sysc_cache != v)
+		_write_sysconfig(v, oh);
 
 	/*
 	 * Set the autoidle bit only after setting the smartidle bit

arch/arm/mach-omap2/omap_hwmod_33xx_data.c

@@ -325,7 +325,6 @@ static struct omap_hwmod am33xx_adc_tsc_hwmod = {
  *
  *    - cEFUSE (doesn't fall under any ocp_if)
  *    - clkdiv32k
- *    - debugss
  *    - ocp watch point
  */
 #if 0
@@ -369,27 +368,6 @@ static struct omap_hwmod am33xx_clkdiv32k_hwmod = {
 	},
 };
 
-/*
- * 'debugss' class
- * debug sub system
- */
-static struct omap_hwmod_class am33xx_debugss_hwmod_class = {
-	.name		= "debugss",
-};
-
-static struct omap_hwmod am33xx_debugss_hwmod = {
-	.name		= "debugss",
-	.class		= &am33xx_debugss_hwmod_class,
-	.clkdm_name	= "l3_aon_clkdm",
-	.main_clk	= "debugss_ick",
-	.prcm		= {
-		.omap4	= {
-			.clkctrl_offs	= AM33XX_CM_WKUP_DEBUGSS_CLKCTRL_OFFSET,
-			.modulemode	= MODULEMODE_SWCTRL,
-		},
-	},
-};
-
 /* ocpwp */
 static struct omap_hwmod_class am33xx_ocpwp_hwmod_class = {
 	.name		= "ocpwp",
@@ -482,6 +460,34 @@ static struct omap_hwmod am33xx_ocmcram_hwmod = {
 	},
 };
 
+/*
+ * 'debugss' class
+ * debug sub system
+ */
+static struct omap_hwmod_opt_clk debugss_opt_clks[] = {
+	{ .role = "dbg_sysclk", .clk = "dbg_sysclk_ck" },
+	{ .role = "dbg_clka", .clk = "dbg_clka_ck" },
+};
+
+static struct omap_hwmod_class am33xx_debugss_hwmod_class = {
+	.name		= "debugss",
+};
+
+static struct omap_hwmod am33xx_debugss_hwmod = {
+	.name		= "debugss",
+	.class		= &am33xx_debugss_hwmod_class,
+	.clkdm_name	= "l3_aon_clkdm",
+	.main_clk	= "trace_clk_div_ck",
+	.prcm		= {
+		.omap4	= {
+			.clkctrl_offs	= AM33XX_CM_WKUP_DEBUGSS_CLKCTRL_OFFSET,
+			.modulemode	= MODULEMODE_SWCTRL,
+		},
+	},
+	.opt_clks	= debugss_opt_clks,
+	.opt_clks_cnt	= ARRAY_SIZE(debugss_opt_clks),
+};
+
 /* 'smartreflex' class */
 static struct omap_hwmod_class am33xx_smartreflex_hwmod_class = {
 	.name		= "smartreflex",
@@ -1796,6 +1802,24 @@ static struct omap_hwmod_ocp_if am33xx_l3_main__gfx = {
 	.user		= OCP_USER_MPU | OCP_USER_SDMA,
 };
 
+/* l3_main -> debugss */
+static struct omap_hwmod_addr_space am33xx_debugss_addrs[] = {
+	{
+		.pa_start	= 0x4b000000,
+		.pa_end		= 0x4b000000 + SZ_16M - 1,
+		.flags		= ADDR_TYPE_RT
+	},
+	{ }
+};
+
+static struct omap_hwmod_ocp_if am33xx_l3_main__debugss = {
+	.master		= &am33xx_l3_main_hwmod,
+	.slave		= &am33xx_debugss_hwmod,
+	.clk		= "dpll_core_m4_ck",
+	.addr		= am33xx_debugss_addrs,
+	.user		= OCP_USER_MPU,
+};
+
 /* l4 wkup -> smartreflex0 */
 static struct omap_hwmod_ocp_if am33xx_l4_wkup__smartreflex0 = {
 	.master		= &am33xx_l4_wkup_hwmod,
@@ -2470,6 +2494,7 @@ static struct omap_hwmod_ocp_if *am33xx_hwmod_ocp_ifs[] __initdata = {
 	&am33xx_pruss__l3_main,
 	&am33xx_wkup_m3__l4_wkup,
 	&am33xx_gfx__l3_main,
+	&am33xx_l3_main__debugss,
 	&am33xx_l4_wkup__wkup_m3,
 	&am33xx_l4_wkup__control,
 	&am33xx_l4_wkup__smartreflex0,

arch/arm/mach-omap2/omap_hwmod_54xx_data.c

@@ -740,6 +740,39 @@ static struct omap_hwmod omap54xx_kbd_hwmod = {
 	},
 };
 
+/*
+ * 'mailbox' class
+ * mailbox module allowing communication between the on-chip processors using a
+ * queued mailbox-interrupt mechanism.
+ */
+
+static struct omap_hwmod_class_sysconfig omap54xx_mailbox_sysc = {
+	.rev_offs	= 0x0000,
+	.sysc_offs	= 0x0010,
+	.sysc_flags	= (SYSC_HAS_RESET_STATUS | SYSC_HAS_SIDLEMODE |
+			   SYSC_HAS_SOFTRESET),
+	.idlemodes	= (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART),
+	.sysc_fields	= &omap_hwmod_sysc_type2,
+};
+
+static struct omap_hwmod_class omap54xx_mailbox_hwmod_class = {
+	.name	= "mailbox",
+	.sysc	= &omap54xx_mailbox_sysc,
+};
+
+/* mailbox */
+static struct omap_hwmod omap54xx_mailbox_hwmod = {
+	.name		= "mailbox",
+	.class		= &omap54xx_mailbox_hwmod_class,
+	.clkdm_name	= "l4cfg_clkdm",
+	.prcm = {
+		.omap4 = {
+			.clkctrl_offs = OMAP54XX_CM_L4CFG_MAILBOX_CLKCTRL_OFFSET,
+			.context_offs = OMAP54XX_RM_L4CFG_MAILBOX_CONTEXT_OFFSET,
+		},
+	},
+};
+
 /*
  * 'mcbsp' class
  * multi channel buffered serial port controller
@@ -1808,6 +1841,14 @@ static struct omap_hwmod_ocp_if omap54xx_l4_wkup__kbd = {
 	.user		= OCP_USER_MPU | OCP_USER_SDMA,
 };
 
+/* l4_cfg -> mailbox */
+static struct omap_hwmod_ocp_if omap54xx_l4_cfg__mailbox = {
+	.master		= &omap54xx_l4_cfg_hwmod,
+	.slave		= &omap54xx_mailbox_hwmod,
+	.clk		= "l4_root_clk_div",
+	.user		= OCP_USER_MPU | OCP_USER_SDMA,
+};
+
 /* l4_abe -> mcbsp1 */
 static struct omap_hwmod_ocp_if omap54xx_l4_abe__mcbsp1 = {
 	.master		= &omap54xx_l4_abe_hwmod,
@@ -2108,6 +2149,7 @@ static struct omap_hwmod_ocp_if *omap54xx_hwmod_ocp_ifs[] __initdata = {
 	&omap54xx_l4_per__i2c4,
 	&omap54xx_l4_per__i2c5,
 	&omap54xx_l4_wkup__kbd,
+	&omap54xx_l4_cfg__mailbox,
 	&omap54xx_l4_abe__mcbsp1,
 	&omap54xx_l4_abe__mcbsp2,
 	&omap54xx_l4_abe__mcbsp3,

arch/arm/mach-omap2/powerdomains3xxx_data.c

@@ -336,6 +336,13 @@ static struct powerdomain dpll5_pwrdm = {
 	.voltdm		  = { .name = "core" },
 };
 
+static struct powerdomain alwon_81xx_pwrdm = {
+	.name		  = "alwon_pwrdm",
+	.prcm_offs	  = TI81XX_PRM_ALWON_MOD,
+	.pwrsts		  = PWRSTS_OFF_ON,
+	.voltdm		  = { .name = "core" },
+};
+
 static struct powerdomain device_81xx_pwrdm = {
 	.name		  = "device_pwrdm",
 	.prcm_offs	  = TI81XX_PRM_DEVICE_MOD,
@@ -442,6 +449,7 @@ static struct powerdomain *powerdomains_am35x[] __initdata = {
 };
 
 static struct powerdomain *powerdomains_ti81xx[] __initdata = {
+	&alwon_81xx_pwrdm,
 	&device_81xx_pwrdm,
 	&active_816x_pwrdm,
 	&default_816x_pwrdm,

arch/arm/mach-omap2/prcm-common.h

@@ -58,6 +58,7 @@
 #define TI816X_PRM_IVAHD1_MOD			0x0d00
 #define TI816X_PRM_IVAHD2_MOD			0x0e00
 #define TI816X_PRM_SGX_MOD				0x0f00
+#define TI81XX_PRM_ALWON_MOD			0x1800
 
 /* 24XX register bits shared between CM & PRM registers */