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mfd: qcom_rpm: write fw_version to CTRL_REG

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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>
This commit is contained in:
Jonathan Marek 2018-11-19 14:53:17 -05:00 committed by Lee Jones
parent ac4ca4b9f4
commit 504e417582
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]);