From mboxrd@z Thu Jan 1 00:00:00 1970 From: 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> References: <1466596043-27262-1-git-send-email-ldewangan@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1466596043-27262-1-git-send-email-ldewangan@nvidia.com> Sender: linux-pwm-owner@vger.kernel.org To: thierry.reding@gmail.com, robh+dt@kernel.org, swarren@wwwdotorg.org, gnurou@gmail.com Cc: linux-pwm@vger.kernel.org, devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, Rohith Seelaboyina , Laxman Dewangan List-Id: devicetree@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