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ARM: OMAP4: hwmod: Don't wait for the idle status if modulemode is not supported

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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>
This commit is contained in:
Benoit Cousson 2011-12-16 16:09:11 -08:00 committed by Tony Lindgren
parent ddf536d0d7
commit bfc141e3a5
1 changed files with 49 additions and 49 deletions
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98
arch/arm/mach-omap2/omap_hwmod.c
View File

@ -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;
}
/**
@ -1152,36 +1190,6 @@ static int _wait_target_ready(struct omap_hwmod *oh)
return ret;
}
/**
* _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 *
@ -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);