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mfd: qcom_rpm: write fw_version to CTRL_REG

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[ Upstream commit 504e417582 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jonathan Marek
2018-11-19 14:53:17 -05:00
committed by Chris
parent 52903035e2
commit 0753c312cd
1 changed files with 4 additions and 0 deletions
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4
drivers/mfd/qcom_rpm.c
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@@ -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]);