From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752486AbcFVMC1 (ORCPT ); Wed, 22 Jun 2016 08:02:27 -0400 Received: from hqemgate14.nvidia.com ([216.228.121.143]:5822 "EHLO hqemgate14.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752600AbcFVMBI (ORCPT ); Wed, 22 Jun 2016 08:01:08 -0400 X-PGP-Universal: processed; by hqnvupgp08.nvidia.com on Wed, 22 Jun 2016 05:00:13 -0700 From: Laxman Dewangan To: , , , CC: , , , , Rohith Seelaboyina , Laxman Dewangan Subject: [PATCH 1/5] pwm: tegra: Add support for reset control Date: Wed, 22 Jun 2016 17:17:19 +0530 Message-ID: <1466596043-27262-2-git-send-email-ldewangan@nvidia.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1466596043-27262-1-git-send-email-ldewangan@nvidia.com> References: <1466596043-27262-1-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 From: Rohith Seelaboyina Add reset control of the PWM controller to reset it before accessing the PWM register. Signed-off-by: Rohith Seelaboyina Signed-off-by: Laxman Dewangan --- drivers/pwm/pwm-tegra.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/pwm/pwm-tegra.c b/drivers/pwm/pwm-tegra.c index d4de060..71b9c4d 100644 --- a/drivers/pwm/pwm-tegra.c +++ b/drivers/pwm/pwm-tegra.c @@ -29,6 +29,7 @@ #include #include #include +#include #define PWM_ENABLE (1 << 31) #define PWM_DUTY_WIDTH 8 @@ -43,6 +44,7 @@ struct tegra_pwm_chip { struct device *dev; struct clk *clk; + struct reset_control *rstc; void __iomem *mmio_base; }; @@ -189,6 +191,14 @@ static int tegra_pwm_probe(struct platform_device *pdev) if (IS_ERR(pwm->clk)) return PTR_ERR(pwm->clk); + pwm->rstc = devm_reset_control_get(&pdev->dev, "pwm"); + if (IS_ERR(pwm->rstc)) { + ret = PTR_ERR(pwm->rstc); + dev_err(&pdev->dev, "Reset control is not found: %d\n", ret); + return ret; + } + reset_control_reset(pwm->rstc); + pwm->chip.dev = &pdev->dev; pwm->chip.ops = &tegra_pwm_ops; pwm->chip.base = -1; -- 2.1.4