From 9c8b0ec7a46c5840fddaa570933335f4ccbbd078 Mon Sep 17 00:00:00 2001 From: Paul Walmsley Date: Wed, 18 Apr 2012 19:10:02 -0600 Subject: [PATCH] ARM: OMAP2+: hwmod: control all hardreset lines attached to a hwmod MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Parts of the hwmod code test to see if a module has one and only one hardreset line before taking an action. It seems more appropriate to control all hardreset lines associated with a hwmod, not just one. It so happens that with the current hwmod data, this patch will not change any behavior, since hwmods with hardreset lines have only one hardreset line associated with them, and 'pseudo-hwmods' are used to handle the other hardreset lines. But future hwmod data patches to remove the pseudo-hwmods will change this. Signed-off-by: Paul Walmsley Cc: Benoît Cousson --- arch/arm/mach-omap2/omap_hwmod.c | 29 +++++++++++++++-------------- 1 file changed, 15 insertions(+), 14 deletions(-) diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 7144ae651d3d..4997c1a8b59d 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -1480,6 +1480,11 @@ static int _reset(struct omap_hwmod *oh) pr_debug("omap_hwmod: %s: resetting\n", oh->name); + /* + * XXX We're not resetting modules with hardreset lines + * automatically here. Should we do this also, or just expect + * those modules to define custom reset functions? + */ ret = (oh->class->reset) ? oh->class->reset(oh) : _ocp_softreset(oh); if (oh->class->sysc) { @@ -1500,7 +1505,7 @@ static int _reset(struct omap_hwmod *oh) */ static int _enable(struct omap_hwmod *oh) { - int r; + int r, i; int hwsup = 0; pr_debug("omap_hwmod: %s: enabling\n", oh->name); @@ -1532,15 +1537,15 @@ static int _enable(struct omap_hwmod *oh) return -EINVAL; } - /* - * If an IP contains only one HW reset line, then de-assert it in order + * If an IP contains HW reset lines, then de-assert them in order * to allow the module state transition. Otherwise the PRCM will return * Intransition status, and the init will failed. */ - if ((oh->_state == _HWMOD_STATE_INITIALIZED || - oh->_state == _HWMOD_STATE_DISABLED) && oh->rst_lines_cnt == 1) - _deassert_hardreset(oh, oh->rst_lines[0].name); + if (oh->_state == _HWMOD_STATE_INITIALIZED || + oh->_state == _HWMOD_STATE_DISABLED) + for (i = 0; i < oh->rst_lines_cnt; i++) + _deassert_hardreset(oh, oh->rst_lines[i].name); /* Mux pins for device runtime if populated */ if (oh->mux && (!oh->mux->enabled || @@ -1687,7 +1692,7 @@ int omap_hwmod_set_ocp_autoidle(struct omap_hwmod *oh, u8 autoidle) */ static int _shutdown(struct omap_hwmod *oh) { - int ret; + int ret, i; u8 prev_state; if (oh->_state != _HWMOD_STATE_IDLE && @@ -1728,12 +1733,8 @@ static int _shutdown(struct omap_hwmod *oh) } /* XXX Should this code also force-disable the optional clocks? */ - /* - * If an IP contains only one HW reset line, then assert it - * after disabling the clocks and before shutting down the IP. - */ - if (oh->rst_lines_cnt == 1) - _assert_hardreset(oh, oh->rst_lines[0].name); + for (i = 0; i < oh->rst_lines_cnt; i++) + _assert_hardreset(oh, oh->rst_lines[i].name); /* Mux pins to safe mode or use populated off mode values */ if (oh->mux) @@ -1786,7 +1787,7 @@ static int _setup(struct omap_hwmod *oh, void *data) * reset asserted. Exit without warning because that behavior is * expected. */ - if ((oh->flags & HWMOD_INIT_NO_RESET) && oh->rst_lines_cnt == 1) + if ((oh->flags & HWMOD_INIT_NO_RESET) && oh->rst_lines_cnt > 0) return 0; r = _enable(oh); -- GitLab