linux-kernel - [PATCH AUTOSEL 4.18 65/88] reset: imx7: Fix always writing bits as 0

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Date:   Fri, 7 Sep 2018 00:36:38 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Leonard Crestez <leonard.crestez@....com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL 4.18 65/88] reset: imx7: Fix always writing bits as 0

From: Leonard Crestez <leonard.crestez@....com>

[ Upstream commit 26fce0557fa639fb7bbc33e31a57cff7df25c3a0 ]

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>
Signed-off-by: Philipp Zabel <p.zabel@...gutronix.de>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 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
@@ -80,7 +80,7 @@ static int imx7_reset_set(struct reset_controller_dev *rcdev,
 {
 	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:
-- 
2.17.1