linux-kernel - [PATCH v2 2/3] reset: imx7: Fix always writing bits as 0

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Message-Id: <54f436a1d2a11a379af642a3327312367ef95343.1532090446.git.leonard.crestez@nxp.com>
Date:   Fri, 20 Jul 2018 15:47:43 +0300
From:   Leonard Crestez <leonard.crestez@....com>
To:     Lucas Stach <l.stach@...gutronix.de>,
        Richard Zhu <hongxing.zhu@....com>,
        Andrey Smirnov <andrew.smirnov@...il.com>
Cc:     Shawn Guo <shawnguo@...nel.org>,
        Joao Pinto <Joao.Pinto@...opsys.com>,
        Jingoo Han <jingoohan1@...il.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        linux-pci@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Fabio Estevam <fabio.estevam@....com>,
        Dong Aisheng <aisheng.dong@....com>, kernel@...gutronix.de,
        linux-imx@....com
Subject: [PATCH v2 2/3] reset: imx7: Fix always writing bits as 0

Right now the only user of reset-imx7 is pci-imx6 and the
reset_control_assert and deassert calls on pciephy_reset don't toggle
the PCIEPHY_BTN and PCIEPHY_G_RST bits as expected. Fix this by writing
1 or 0 respectively.

The reference manual is not very clear regarding SRC_PCIEPHY_RCR but for
other registers like MIPIPHY and HSICPHY the bits are explicitly
documented as "1 means assert, 0 means deassert".

The values are still reversed for IMX7_RESET_PCIE_CTRL_APPS_EN.

Signed-off-by: Leonard Crestez <leonard.crestez@....com>
Reviewed-by: Lucas Stach <l.stach@...gutronix.de>
---
 drivers/reset/reset-imx7.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/reset/reset-imx7.c b/drivers/reset/reset-imx7.c
index 4db177bc89bc..fdeac1946429 100644
--- a/drivers/reset/reset-imx7.c
+++ b/drivers/reset/reset-imx7.c
@@ -78,11 +78,11 @@ static struct imx7_src *to_imx7_src(struct reset_controller_dev *rcdev)
 static int imx7_reset_set(struct reset_controller_dev *rcdev,
 			  unsigned long id, bool assert)
 {
 	struct imx7_src *imx7src = to_imx7_src(rcdev);
 	const struct imx7_src_signal *signal = &imx7_src_signals[id];
-	unsigned int value = 0;
+	unsigned int value = assert ? signal->bit : 0;
 
 	switch (id) {
 	case IMX7_RESET_PCIEPHY:
 		/*
 		 * wait for more than 10us to release phy g_rst and
-- 
2.17.1