From 504e4175829c44328773b96ad9c538e4783a8d22 Mon Sep 17 00:00:00 2001
From: Jonathan Marek <jonathan@marek.ca>
Date: Mon, 19 Nov 2018 14:53:17 -0500
Subject: [PATCH] mfd: qcom_rpm: write fw_version to CTRL_REG
Git-commit: 504e4175829c44328773b96ad9c538e4783a8d22
Patch-mainline: v5.0-rc3
References: bsc#1051510
This is required as part of the initialization sequence on certain SoCs.
If these registers are not initialized, the hardware can be unresponsive.
This fixes the driver on apq8060 (HP TouchPad device).
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/mfd/qcom_rpm.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/mfd/qcom_rpm.c b/drivers/mfd/qcom_rpm.c
index 52fafea06067..8d420c37b2a6 100644
--- a/drivers/mfd/qcom_rpm.c
+++ b/drivers/mfd/qcom_rpm.c
@@ -638,6 +638,10 @@ static int qcom_rpm_probe(struct platform_device *pdev)
return -EFAULT;
}
+ writel(fw_version[0], RPM_CTRL_REG(rpm, 0));
+ writel(fw_version[1], RPM_CTRL_REG(rpm, 1));
+ writel(fw_version[2], RPM_CTRL_REG(rpm, 2));
+
dev_info(&pdev->dev, "RPM firmware %u.%u.%u\n", fw_version[0],
fw_version[1],
fw_version[2]);
--
2.16.4