From: Jonathan Marek Date: Mon, 19 Nov 2018 19:53:17 +0000 (-0500) Subject: mfd: qcom_rpm: write fw_version to CTRL_REG X-Git-Tag: v5.0-rc3~43^2~13 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=504e4175829c44328773b96ad9c538e4783a8d22;p=linux-block.git mfd: qcom_rpm: write fw_version to CTRL_REG 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 Signed-off-by: Lee Jones --- 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]);