Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934429AbdCWLBN (ORCPT ); Thu, 23 Mar 2017 07:01:13 -0400 Received: from dougal.metanate.com ([90.155.101.14]:14850 "EHLO metanate.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932466AbdCWLAe (ORCPT ); Thu, 23 Mar 2017 07:00:34 -0400 From: John Keeping To: Linus Walleij Cc: Heiko Stuebner , Julia Cartwright , linux-gpio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, John Keeping Subject: [PATCH v4 1/4] pinctrl: rockchip: remove unnecessary locking Date: Thu, 23 Mar 2017 10:59:28 +0000 Message-Id: <20170323105931.10455-2-john@metanate.com> X-Mailer: git-send-email 2.12.0.377.gf910686b23.dirty In-Reply-To: <20170323105931.10455-1-john@metanate.com> References: <20170323105931.10455-1-john@metanate.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5270 Lines: 172 regmap_update_bits does its own locking and everything else accessed here is a local variable so there is no need to lock around it. Signed-off-by: John Keeping Reviewed-by: Heiko Stuebner Tested-by: Heiko Stuebner --- v3: unchanged v2.1: - Remove RK2928 locking in rockchip_set_pull() v2: - Also remove locking in rockchip_set_schmitt() --- drivers/pinctrl/pinctrl-rockchip.c | 33 ++------------------------------- 1 file changed, 2 insertions(+), 31 deletions(-) diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c index bd4b63f66220..6568c867bdcd 100644 --- a/drivers/pinctrl/pinctrl-rockchip.c +++ b/drivers/pinctrl/pinctrl-rockchip.c @@ -652,7 +652,6 @@ static int rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux) int iomux_num = (pin / 8); struct regmap *regmap; int reg, ret, mask, mux_type; - unsigned long flags; u8 bit; u32 data, rmask; @@ -701,15 +700,11 @@ static int rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux) if (ctrl->iomux_recalc && (mux_type & IOMUX_RECALCED)) ctrl->iomux_recalc(bank->bank_num, pin, ®, &bit, &mask); - spin_lock_irqsave(&bank->slock, flags); - data = (mask << (bit + 16)); rmask = data | (data >> 16); data |= (mux & mask) << bit; ret = regmap_update_bits(regmap, reg, rmask, data); - spin_unlock_irqrestore(&bank->slock, flags); - return ret; } @@ -1135,7 +1130,6 @@ static int rockchip_set_drive_perpin(struct rockchip_pin_bank *bank, struct rockchip_pinctrl *info = bank->drvdata; struct rockchip_pin_ctrl *ctrl = info->ctrl; struct regmap *regmap; - unsigned long flags; int reg, ret, i; u32 data, rmask, rmask_bits, temp; u8 bit; @@ -1163,8 +1157,6 @@ static int rockchip_set_drive_perpin(struct rockchip_pin_bank *bank, return ret; } - spin_lock_irqsave(&bank->slock, flags); - switch (drv_type) { case DRV_TYPE_IO_1V8_3V0_AUTO: case DRV_TYPE_IO_3V3_ONLY: @@ -1185,17 +1177,14 @@ static int rockchip_set_drive_perpin(struct rockchip_pin_bank *bank, rmask = BIT(15) | BIT(31); data |= BIT(31); ret = regmap_update_bits(regmap, reg, rmask, data); - if (ret) { - spin_unlock_irqrestore(&bank->slock, flags); + if (ret) return ret; - } rmask = 0x3 | (0x3 << 16); temp |= (0x3 << 16); reg += 0x4; ret = regmap_update_bits(regmap, reg, rmask, temp); - spin_unlock_irqrestore(&bank->slock, flags); return ret; case 18 ... 21: /* setting fully enclosed in the second register */ @@ -1203,7 +1192,6 @@ static int rockchip_set_drive_perpin(struct rockchip_pin_bank *bank, bit -= 16; break; default: - spin_unlock_irqrestore(&bank->slock, flags); dev_err(info->dev, "unsupported bit: %d for pinctrl drive type: %d\n", bit, drv_type); return -EINVAL; @@ -1215,7 +1203,6 @@ static int rockchip_set_drive_perpin(struct rockchip_pin_bank *bank, rmask_bits = RK3288_DRV_BITS_PER_PIN; break; default: - spin_unlock_irqrestore(&bank->slock, flags); dev_err(info->dev, "unsupported pinctrl drive type: %d\n", drv_type); return -EINVAL; @@ -1227,7 +1214,6 @@ static int rockchip_set_drive_perpin(struct rockchip_pin_bank *bank, data |= (ret << bit); ret = regmap_update_bits(regmap, reg, rmask, data); - spin_unlock_irqrestore(&bank->slock, flags); return ret; } @@ -1294,7 +1280,6 @@ static int rockchip_set_pull(struct rockchip_pin_bank *bank, struct rockchip_pin_ctrl *ctrl = info->ctrl; struct regmap *regmap; int reg, ret, i, pull_type; - unsigned long flags; u8 bit; u32 data, rmask; @@ -1309,14 +1294,10 @@ static int rockchip_set_pull(struct rockchip_pin_bank *bank, switch (ctrl->type) { case RK2928: - spin_lock_irqsave(&bank->slock, flags); - data = BIT(bit + 16); if (pull == PIN_CONFIG_BIAS_DISABLE) data |= BIT(bit); ret = regmap_write(regmap, reg, data); - - spin_unlock_irqrestore(&bank->slock, flags); break; case RV1108: case RK3188: @@ -1339,16 +1320,12 @@ static int rockchip_set_pull(struct rockchip_pin_bank *bank, return ret; } - spin_lock_irqsave(&bank->slock, flags); - /* enable the write to the equivalent lower bits */ data = ((1 << RK3188_PULL_BITS_PER_PIN) - 1) << (bit + 16); rmask = data | (data >> 16); data |= (ret << bit); ret = regmap_update_bits(regmap, reg, rmask, data); - - spin_unlock_irqrestore(&bank->slock, flags); break; default: dev_err(info->dev, "unsupported pinctrl type\n"); @@ -1408,7 +1385,6 @@ static int rockchip_set_schmitt(struct rockchip_pin_bank *bank, struct rockchip_pin_ctrl *ctrl = info->ctrl; struct regmap *regmap; int reg, ret; - unsigned long flags; u8 bit; u32 data, rmask; @@ -1419,16 +1395,11 @@ static int rockchip_set_schmitt(struct rockchip_pin_bank *bank, if (ret) return ret; - spin_lock_irqsave(&bank->slock, flags); - /* enable the write to the equivalent lower bits */ data = BIT(bit + 16) | (enable << bit); rmask = BIT(bit + 16) | BIT(bit); - ret = regmap_update_bits(regmap, reg, rmask, data); - spin_unlock_irqrestore(&bank->slock, flags); - - return ret; + return regmap_update_bits(regmap, reg, rmask, data); } /* -- 2.12.0.377.gf910686b23.dirty