From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754595AbaDOUQF (ORCPT ); Tue, 15 Apr 2014 16:16:05 -0400 Received: from mail-ie0-f201.google.com ([209.85.223.201]:43521 "EHLO mail-ie0-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751040AbaDOUO4 (ORCPT ); Tue, 15 Apr 2014 16:14:56 -0400 From: Doug Anderson To: Anton Vorontsov Cc: Olof Johansson , Sachin Kamat , ajaykumar.rs@samsung.com, linux-samsung-soc@vger.kernel.org, Doug Anderson , Samuel Ortiz , Lee Jones , linux-kernel@vger.kernel.org Subject: [PATCH 2/3] mfd: tps65090: Stop caching registers Date: Tue, 15 Apr 2014 13:14:35 -0700 Message-Id: <1397592876-5741-3-git-send-email-dianders@chromium.org> X-Mailer: git-send-email 1.9.1.423.g4596e3a In-Reply-To: <1397592876-5741-1-git-send-email-dianders@chromium.org> References: <1397592876-5741-1-git-send-email-dianders@chromium.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Nearly all of the registers in tps65090 combine control bits and status bits. Turn off caching of registers so that we can read status bits reliably. NOTE: the IRQnMASK and CG_CTRLn registers are the exception and could be cached. If we find that we spend a lot of time reading those we can turn on cache for just those registers. Signed-off-by: Doug Anderson --- drivers/mfd/tps65090.c | 10 ---------- 1 file changed, 10 deletions(-) diff --git a/drivers/mfd/tps65090.c b/drivers/mfd/tps65090.c index c3cddb4..4cfdd07 100644 --- a/drivers/mfd/tps65090.c +++ b/drivers/mfd/tps65090.c @@ -149,21 +149,11 @@ static struct regmap_irq_chip tps65090_irq_chip = { .mask_invert = true, }; -static bool is_volatile_reg(struct device *dev, unsigned int reg) -{ - if ((reg == TPS65090_INT_STS) || (reg == TPS65090_INT_STS2)) - return true; - else - return false; -} - static const struct regmap_config tps65090_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = TOTAL_NUM_REG, .num_reg_defaults_raw = TOTAL_NUM_REG, - .cache_type = REGCACHE_RBTREE, - .volatile_reg = is_volatile_reg, }; #ifdef CONFIG_OF -- 1.9.1.423.g4596e3a