From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753320AbaEWKfK (ORCPT ); Fri, 23 May 2014 06:35:10 -0400 Received: from mail-we0-f178.google.com ([74.125.82.178]:61506 "EHLO mail-we0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753078AbaEWKcz (ORCPT ); Fri, 23 May 2014 06:32:55 -0400 From: Daniel Lezcano To: tglx@linutronix.de, mingo@kernel.org Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 63/71] clocksource: Fix clocksource_mmio_readX_down Date: Fri, 23 May 2014 12:31:43 +0200 Message-Id: <1400841111-6683-63-git-send-email-daniel.lezcano@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1400841111-6683-1-git-send-email-daniel.lezcano@linaro.org> References: <537F214C.8000700@linaro.org> <1400841111-6683-1-git-send-email-daniel.lezcano@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Xiubo Li For some clocksource devices, for example, the registers are 32-bit, while the lower 16-bit is used for timer counting(And reading the upper 16-bit will return 0). For example, when the counter value is 0x00001111, and then the ~readl_relaxed(to_mmio_clksrc(c)->reg) will return the value of 0xFFFFEEEE, but it should be 0x0000EEEE. So just using the c->mask to mask the unused bits. Signed-off-by: Xiubo Li Signed-off-by: Daniel Lezcano --- drivers/clocksource/mmio.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/clocksource/mmio.c b/drivers/clocksource/mmio.c index 19a6b3f..1593ade 100644 --- a/drivers/clocksource/mmio.c +++ b/drivers/clocksource/mmio.c @@ -27,7 +27,7 @@ cycle_t clocksource_mmio_readl_up(struct clocksource *c) cycle_t clocksource_mmio_readl_down(struct clocksource *c) { - return ~(cycle_t)readl_relaxed(to_mmio_clksrc(c)->reg); + return ~(cycle_t)readl_relaxed(to_mmio_clksrc(c)->reg) & c->mask; } cycle_t clocksource_mmio_readw_up(struct clocksource *c) @@ -37,7 +37,7 @@ cycle_t clocksource_mmio_readw_up(struct clocksource *c) cycle_t clocksource_mmio_readw_down(struct clocksource *c) { - return ~(cycle_t)readw_relaxed(to_mmio_clksrc(c)->reg); + return ~(cycle_t)readw_relaxed(to_mmio_clksrc(c)->reg) & c->mask; } /** -- 1.7.9.5