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