From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752293Ab2GPHB1 (ORCPT ); Mon, 16 Jul 2012 03:01:27 -0400 Received: from hqemgate03.nvidia.com ([216.228.121.140]:6370 "EHLO hqemgate03.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751192Ab2GPHBU (ORCPT ); Mon, 16 Jul 2012 03:01:20 -0400 X-PGP-Universal: processed; by hqnvupgp06.nvidia.com on Mon, 16 Jul 2012 00:01:13 -0700 From: Laxman Dewangan To: , , CC: , , , Laxman Dewangan Subject: [PATCH V2 3/6] mfd: tps6586x: cache register through regmap Date: Mon, 16 Jul 2012 12:21:47 +0530 Message-ID: <1342421510-10638-4-git-send-email-ldewangan@nvidia.com> X-Mailer: git-send-email 1.7.1.1 In-Reply-To: <1342421510-10638-1-git-send-email-ldewangan@nvidia.com> References: <1342421510-10638-1-git-send-email-ldewangan@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org To cache the interrupt mask register, use the regmap RB_TREE cache-ing mechanism in place of implementing it locally. Signed-off-by: Laxman Dewangan --- Changes V1 -> V2: No change, generated new patch for V2 series. drivers/mfd/tps6586x.c | 24 ++++++++++++++++-------- 1 files changed, 16 insertions(+), 8 deletions(-) diff --git a/drivers/mfd/tps6586x.c b/drivers/mfd/tps6586x.c index fb0c109..7210fa7 100644 --- a/drivers/mfd/tps6586x.c +++ b/drivers/mfd/tps6586x.c @@ -104,7 +104,6 @@ struct tps6586x { struct mutex irq_lock; int irq_base; u32 irq_en; - u8 mask_cache[5]; u8 mask_reg[5]; }; @@ -276,12 +275,11 @@ static void tps6586x_irq_sync_unlock(struct irq_data *data) int i; for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) { - if (tps6586x->mask_reg[i] != tps6586x->mask_cache[i]) { - if (!WARN_ON(tps6586x_write(tps6586x->dev, - TPS6586X_INT_MASK1 + i, - tps6586x->mask_reg[i]))) - tps6586x->mask_cache[i] = tps6586x->mask_reg[i]; - } + int ret; + ret = tps6586x_write(tps6586x->dev, + TPS6586X_INT_MASK1 + i, + tps6586x->mask_reg[i]); + WARN_ON(ret); } mutex_unlock(&tps6586x->irq_lock); @@ -328,7 +326,6 @@ static int __devinit tps6586x_irq_init(struct tps6586x *tps6586x, int irq, mutex_init(&tps6586x->irq_lock); for (i = 0; i < 5; i++) { - tps6586x->mask_cache[i] = 0xff; tps6586x->mask_reg[i] = 0xff; tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff); } @@ -478,10 +475,21 @@ static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *clien } #endif +static bool is_volatile_reg(struct device *dev, unsigned int reg) +{ + /* Cache all interrupt mask register */ + if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5)) + return false; + + return true; +} + static const struct regmap_config tps6586x_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = TPS6586X_MAX_REGISTER - 1, + .volatile_reg = is_volatile_reg, + .cache_type = REGCACHE_RBTREE, }; static int __devinit tps6586x_i2c_probe(struct i2c_client *client, -- 1.7.1.1