From: Shawn Guo <shawn.guo@linaro.org>
To: Sebastian Reichel <sre@kernel.org>
Cc: Rob Herring <robh+dt@kernel.org>, Vinod Koul <vkoul@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org,
linux-pm@vger.kernel.org, Shawn Guo <shawn.guo@linaro.org>
Subject: [PATCH 3/3] power: reset: qcom-pon: Add support for 'qcom,mode-in-imem'
Date: Sun, 4 Jul 2021 15:40:45 +0800 [thread overview]
Message-ID: <20210704074045.21643-4-shawn.guo@linaro.org> (raw)
In-Reply-To: <20210704074045.21643-1-shawn.guo@linaro.org>
Add support for DT property 'qcom,mode-in-imem', which is used on
devices like Sony Xperia M4 Aqua phone (MSM8939) to store a different
set of mode values IMEM rather than PON register.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
---
drivers/power/reset/qcom-pon.c | 25 ++++++++++++++++++++++++-
1 file changed, 24 insertions(+), 1 deletion(-)
diff --git a/drivers/power/reset/qcom-pon.c b/drivers/power/reset/qcom-pon.c
index 4a688741a88a..f63d49c72f55 100644
--- a/drivers/power/reset/qcom-pon.c
+++ b/drivers/power/reset/qcom-pon.c
@@ -42,6 +42,24 @@ static int pm8916_reboot_mode_write(struct reboot_mode_driver *reboot,
return ret;
}
+static int pm8916_reboot_mode_write_imem(struct reboot_mode_driver *reboot,
+ unsigned int magic)
+{
+ struct pm8916_pon *pon = container_of(reboot, struct pm8916_pon,
+ reboot_mode);
+ void __iomem *imem;
+
+ imem = devm_ioremap(pon->dev, pon->baseaddr, 4);
+ if (!imem) {
+ dev_err(pon->dev, "failed to map imem\n");
+ return -ENOMEM;
+ }
+
+ writel(magic, imem);
+
+ return 0;
+}
+
static int pm8916_pon_probe(struct platform_device *pdev)
{
struct pm8916_pon *pon;
@@ -66,7 +84,12 @@ static int pm8916_pon_probe(struct platform_device *pdev)
pon->reboot_mode.dev = &pdev->dev;
pon->reason_shift = (long)of_device_get_match_data(&pdev->dev);
- pon->reboot_mode.write = pm8916_reboot_mode_write;
+
+ if (device_property_present(&pdev->dev, "qcom,mode-in-imem"))
+ pon->reboot_mode.write = pm8916_reboot_mode_write_imem;
+ else
+ pon->reboot_mode.write = pm8916_reboot_mode_write;
+
error = devm_reboot_mode_register(&pdev->dev, &pon->reboot_mode);
if (error) {
dev_err(&pdev->dev, "can't register reboot mode\n");
--
2.17.1
prev parent reply other threads:[~2021-07-04 7:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-04 7:40 [PATCH 0/3] Add 'qcom,mode-in-imem' support in PON driver Shawn Guo
2021-07-04 7:40 ` [PATCH 1/3] dt-bindings: power: reset: Convert qcom,pon to DT schema Shawn Guo
2021-07-04 7:40 ` [PATCH 2/3] dt-bindings: qcom,pon: Add 'qcom,mode-in-imem' support Shawn Guo
2021-07-04 9:36 ` Stephan Gerhold
2021-07-05 2:41 ` Shawn Guo
2021-07-04 7:40 ` Shawn Guo [this message]
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