Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932074AbbDQIuF (ORCPT ); Fri, 17 Apr 2015 04:50:05 -0400 Received: from opensource.wolfsonmicro.com ([80.75.67.52]:39133 "EHLO opensource.wolfsonmicro.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753499AbbDQItF (ORCPT ); Fri, 17 Apr 2015 04:49:05 -0400 From: Charles Keepax To: lee.jones@linaro.org Cc: broonie@kernel.org, sameo@linux.intel.com, linux-kernel@vger.kernel.org, lgirdwood@gmail.com, patches@opensource.wolfsonmicro.com Subject: [PATCH v2 8/9] mfd: arizona: Add better support for system suspend Date: Fri, 17 Apr 2015 09:42:25 +0100 Message-Id: <1429260146-16694-9-git-send-email-ckeepax@opensource.wolfsonmicro.com> X-Mailer: git-send-email 1.7.2.5 In-Reply-To: <1429260146-16694-1-git-send-email-ckeepax@opensource.wolfsonmicro.com> References: <1429260146-16694-1-git-send-email-ckeepax@opensource.wolfsonmicro.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5072 Lines: 180 Allow the chip to completely power off if we enter runtime suspend and there is no jack detection active. This is helpful for systems where system suspend might remove the supplies to the CODEC, without informing us. Note the powering off is done in runtime suspend rather than system suspend, because we need to hold reset until the first time DCVDD is powered anyway (which would be in runtime resume), and we might as well save the extra power. Signed-off-by: Charles Keepax --- drivers/mfd/arizona-core.c | 94 +++++++++++++++++++++++++++++++------- include/linux/mfd/arizona/core.h | 1 + 2 files changed, 78 insertions(+), 17 deletions(-) diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c index 1b2fec0..def3ad3 100644 --- a/drivers/mfd/arizona-core.c +++ b/drivers/mfd/arizona-core.c @@ -442,12 +442,33 @@ static int arizona_runtime_resume(struct device *dev) dev_dbg(arizona->dev, "Leaving AoD mode\n"); + if (arizona->has_fully_powered_off) { + dev_dbg(arizona->dev, "Re-enabling core supplies\n"); + + ret = regulator_bulk_enable(arizona->num_core_supplies, + arizona->core_supplies); + if (ret) { + dev_err(dev, "Failed to enable core supplies: %d\n", + ret); + return ret; + } + } + ret = regulator_enable(arizona->dcvdd); if (ret != 0) { dev_err(arizona->dev, "Failed to enable DCVDD: %d\n", ret); + if (arizona->has_fully_powered_off) + regulator_bulk_disable(arizona->num_core_supplies, + arizona->core_supplies); return ret; } + if (arizona->has_fully_powered_off) { + arizona_disable_reset(arizona); + enable_irq(arizona->irq); + arizona->has_fully_powered_off = false; + } + regcache_cache_only(arizona->regmap, false); switch (arizona->type) { @@ -508,6 +529,14 @@ static int arizona_runtime_resume(struct device *dev) goto err; } } + + ret = wm5110_apply_sleep_patch(arizona); + if (ret) { + dev_err(arizona->dev, + "Failed to re-apply sleep patch: %d\n", + ret); + goto err; + } break; default: ret = arizona_wait_for_boot(arizona); @@ -545,10 +574,17 @@ err: static int arizona_runtime_suspend(struct device *dev) { struct arizona *arizona = dev_get_drvdata(dev); + unsigned int val; int ret; dev_dbg(arizona->dev, "Entering AoD mode\n"); + ret = regmap_read(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE, &val); + if (ret) { + dev_err(dev, "Failed to check jack det status: %d\n", ret); + return ret; + } + if (arizona->external_dcvdd) { ret = regmap_update_bits(arizona->regmap, ARIZONA_ISOLATION_CONTROL, @@ -559,33 +595,57 @@ static int arizona_runtime_suspend(struct device *dev) ret); return ret; } - } else { - switch (arizona->type) { - case WM5110: - case WM8280: - /* - * As this is only called for the internal regulator - * (where we know voltage ranges available) it is ok - * to request an exact range. - */ - ret = regulator_set_voltage(arizona->dcvdd, - 1175000, 1175000); - if (ret < 0) { + } + + switch (arizona->type) { + case WM5110: + case WM8280: + if (arizona->external_dcvdd) + break; + + /* + * As this is only called for the internal regulator + * (where we know voltage ranges available) it is ok + * to request an exact range. + */ + ret = regulator_set_voltage(arizona->dcvdd, 1175000, 1175000); + if (ret < 0) { + dev_err(arizona->dev, + "Failed to set suspend voltage: %d\n", ret); + return ret; + } + break; + case WM5102: + if (!(val & ARIZONA_JD1_ENA)) + ret = regmap_write(arizona->regmap, + ARIZONA_WRITE_SEQUENCER_CTRL_3, 0x0); + if (ret) { dev_err(arizona->dev, - "Failed to set suspend voltage: %d\n", + "Failed to clear write sequencer: %d\n", ret); return ret; } - break; - default: - break; - } + break; + default: + break; } regcache_cache_only(arizona->regmap, true); regcache_mark_dirty(arizona->regmap); regulator_disable(arizona->dcvdd); + /* Allow us to completely power down if no jack detection */ + if (!(val & ARIZONA_JD1_ENA)) { + dev_dbg(arizona->dev, "Fully powering off\n"); + + arizona->has_fully_powered_off = true; + + disable_irq(arizona->irq); + arizona_enable_reset(arizona); + regulator_bulk_disable(arizona->num_core_supplies, + arizona->core_supplies); + } + return 0; } #endif diff --git a/include/linux/mfd/arizona/core.h b/include/linux/mfd/arizona/core.h index f970105..7c210af 100644 --- a/include/linux/mfd/arizona/core.h +++ b/include/linux/mfd/arizona/core.h @@ -117,6 +117,7 @@ struct arizona { int num_core_supplies; struct regulator_bulk_data core_supplies[ARIZONA_MAX_CORE_SUPPLIES]; struct regulator *dcvdd; + bool has_fully_powered_off; struct arizona_pdata pdata; -- 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/