add support for OMAP4 based boards, starting with the PandaBoard

SVN-Revision: 29753

1 files changed, 196 insertions, 0 deletions

diff --git a/target/linux/omap4/patches/000-hwmod_dont_wait.patch b/target/linux/omap4/patches/000-hwmod_dont_wait.patch
new file mode 100644
index 0000000000..87c6aedd3a
--- /dev/null
+++ b/target/linux/omap4/patches/000-hwmod_dont_wait.patch
@@ -0,0 +1,196 @@
+From: Benoit Cousson <b-cousson@ti.com>
+Date: Sat, 17 Dec 2011 00:09:11 +0000 (-0800)
+Subject: ARM: OMAP4: hwmod: Don't wait for the idle status if modulemode is not supported
+X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux.git;a=commitdiff_plain;h=bfc141e3a515008d85e57af39c9faa4d2bbc65e0;hp=ddf536d0d7e1f0b63a681c970888730a4437414d
+
+ARM: OMAP4: hwmod: Don't wait for the idle status if modulemode is not supported
+
+If the module does not have any modulemode, the _disable_module function
+will do nothing. There is then no point waiting for a idle status change.
+
+It will remove the following warnings.
+
+[    0.331848] omap_hwmod: dmm: _wait_target_disable failed
+[    0.339935] omap_hwmod: emif_fw: _wait_target_disable failed
+[    0.348358] omap_hwmod: l3_main_1: _wait_target_disable failed
+[    0.356964] omap_hwmod: l3_main_2: _wait_target_disable failed
+[    0.365600] omap_hwmod: l4_abe: _wait_target_disable failed
+[    0.373931] omap_hwmod: l4_cfg: _wait_target_disable failed
+[    0.382263] omap_hwmod: l4_per: _wait_target_disable failed
+[    0.391113] omap_hwmod: l4_wkup: _wait_target_disable failed
+[    0.399536] omap_hwmod: dma_system: _wait_target_disable failed
+[    0.408325] omap_hwmod: dss_core: _wait_target_disable failed
+[    0.416839] omap_hwmod: dss_dispc: _wait_target_disable failed
+[    0.425445] omap_hwmod: dss_dsi1: _wait_target_disable failed
+[    0.433990] omap_hwmod: dss_dsi2: _wait_target_disable failed
+[    0.442504] omap_hwmod: dss_hdmi: _wait_target_disable failed
+[    0.451019] omap_hwmod: dss_rfbi: _wait_target_disable failed
+[    0.459564] omap_hwmod: dss_venc: _wait_target_disable failed
+[    0.489471] omap_hwmod: mailbox: _wait_target_disable failed
+[    0.505920] omap_hwmod: spinlock: _wait_target_disable failed
+
+Note: For such module, the state is managed automatically by HW according
+to clock domain transition. It is then not possible to wait for idle even
+later in the _idle function since the status will change at clock domain
+boundary.
+
+Signed-off-by: Benoit Cousson <b-cousson@ti.com>
+Cc: Paul Walmsley <paul@pwsan.com>
+Cc: Rajendra Nayak <rnayak@ti.com>
+[paul@pwsan.com: renamed fns to indicate that they are OMAP4-only; moved
+ _wait_target_disable() into _disable_module(), removing duplicate code]
+Signed-off-by: Paul Walmsley <paul@pwsan.com>
+Signed-off-by: Tony Lindgren <tony@atomide.com>
+---
+
+diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
+index 207a2ff..ebace0f 100644
+--- a/arch/arm/mach-omap2/omap_hwmod.c
++++ b/arch/arm/mach-omap2/omap_hwmod.c
+@@ -706,27 +706,65 @@ static void _enable_module(struct omap_hwmod *oh)
+ }
+ 
+ /**
+- * _disable_module - enable CLKCTRL modulemode on OMAP4
++ * _omap4_wait_target_disable - wait for a module to be disabled on OMAP4
++ * @oh: struct omap_hwmod *
++ *
++ * Wait for a module @oh to enter slave idle.  Returns 0 if the module
++ * does not have an IDLEST bit or if the module successfully enters
++ * slave idle; otherwise, pass along the return value of the
++ * appropriate *_cm*_wait_module_idle() function.
++ */
++static int _omap4_wait_target_disable(struct omap_hwmod *oh)
++{
++	if (!cpu_is_omap44xx())
++		return 0;
++
++	if (!oh)
++		return -EINVAL;
++
++	if (oh->_int_flags & _HWMOD_NO_MPU_PORT)
++		return 0;
++
++	if (oh->flags & HWMOD_NO_IDLEST)
++		return 0;
++
++	return omap4_cminst_wait_module_idle(oh->clkdm->prcm_partition,
++					     oh->clkdm->cm_inst,
++					     oh->clkdm->clkdm_offs,
++					     oh->prcm.omap4.clkctrl_offs);
++}
++
++/**
++ * _omap4_disable_module - enable CLKCTRL modulemode on OMAP4
+  * @oh: struct omap_hwmod *
+  *
+  * Disable the PRCM module mode related to the hwmod @oh.
+- * No return value.
++ * Return EINVAL if the modulemode is not supported and 0 in case of success.
+  */
+-static void _disable_module(struct omap_hwmod *oh)
++static int _omap4_disable_module(struct omap_hwmod *oh)
+ {
++	int v;
++
+ 	/* The module mode does not exist prior OMAP4 */
+-	if (cpu_is_omap24xx() || cpu_is_omap34xx())
+-		return;
++	if (!cpu_is_omap44xx())
++		return -EINVAL;
+ 
+ 	if (!oh->clkdm || !oh->prcm.omap4.modulemode)
+-		return;
++		return -EINVAL;
+ 
+-	pr_debug("omap_hwmod: %s: _disable_module\n", oh->name);
++	pr_debug("omap_hwmod: %s: %s\n", oh->name, __func__);
+ 
+ 	omap4_cminst_module_disable(oh->clkdm->prcm_partition,
+ 				    oh->clkdm->cm_inst,
+ 				    oh->clkdm->clkdm_offs,
+ 				    oh->prcm.omap4.clkctrl_offs);
++
++	v = _omap4_wait_target_disable(oh);
++	if (v)
++		pr_warn("omap_hwmod: %s: _wait_target_disable failed\n",
++			oh->name);
++
++	return 0;
+ }
+ 
+ /**
+@@ -1153,36 +1191,6 @@ static int _wait_target_ready(struct omap_hwmod *oh)
+ }
+ 
+ /**
+- * _wait_target_disable - wait for a module to be disabled
+- * @oh: struct omap_hwmod *
+- *
+- * Wait for a module @oh to enter slave idle.  Returns 0 if the module
+- * does not have an IDLEST bit or if the module successfully enters
+- * slave idle; otherwise, pass along the return value of the
+- * appropriate *_cm*_wait_module_idle() function.
+- */
+-static int _wait_target_disable(struct omap_hwmod *oh)
+-{
+-	/* TODO: For now just handle OMAP4+ */
+-	if (cpu_is_omap24xx() || cpu_is_omap34xx())
+-		return 0;
+-
+-	if (!oh)
+-		return -EINVAL;
+-
+-	if (oh->_int_flags & _HWMOD_NO_MPU_PORT)
+-		return 0;
+-
+-	if (oh->flags & HWMOD_NO_IDLEST)
+-		return 0;
+-
+-	return omap4_cminst_wait_module_idle(oh->clkdm->prcm_partition,
+-					     oh->clkdm->cm_inst,
+-					     oh->clkdm->clkdm_offs,
+-					     oh->prcm.omap4.clkctrl_offs);
+-}
+-
+-/**
+  * _lookup_hardreset - fill register bit info for this hwmod/reset line
+  * @oh: struct omap_hwmod *
+  * @name: name of the reset line in the context of this hwmod
+@@ -1524,8 +1532,6 @@ static int _enable(struct omap_hwmod *oh)
+  */
+ static int _idle(struct omap_hwmod *oh)
+ {
+-	int ret;
+-
+ 	pr_debug("omap_hwmod: %s: idling\n", oh->name);
+ 
+ 	if (oh->_state != _HWMOD_STATE_ENABLED) {
+@@ -1537,11 +1543,9 @@ static int _idle(struct omap_hwmod *oh)
+ 	if (oh->class->sysc)
+ 		_idle_sysc(oh);
+ 	_del_initiator_dep(oh, mpu_oh);
+-	_disable_module(oh);
+-	ret = _wait_target_disable(oh);
+-	if (ret)
+-		pr_warn("omap_hwmod: %s: _wait_target_disable failed\n",
+-			oh->name);
++
++	_omap4_disable_module(oh);
++
+ 	/*
+ 	 * The module must be in idle mode before disabling any parents
+ 	 * clocks. Otherwise, the parent clock might be disabled before
+@@ -1642,11 +1646,7 @@ static int _shutdown(struct omap_hwmod *oh)
+ 	if (oh->_state == _HWMOD_STATE_ENABLED) {
+ 		_del_initiator_dep(oh, mpu_oh);
+ 		/* XXX what about the other system initiators here? dma, dsp */
+-		_disable_module(oh);
+-		ret = _wait_target_disable(oh);
+-		if (ret)
+-			pr_warn("omap_hwmod: %s: _wait_target_disable failed\n",
+-				oh->name);
++		_omap4_disable_module(oh);
+ 		_disable_clocks(oh);
+ 		if (oh->clkdm)
+ 			clkdm_hwmod_disable(oh->clkdm, oh);