Commit 1a4fc3d2 authored Apr 18, 2019 by Ofir Drang Committed by Greg Kroah-Hartman May 22, 2019

crypto: ccree - pm resume first enable the source clk



commit 7766dd774d80463cec7b81d90c8672af91de2da1 upstream.

On power management resume function first enable the device clk source
to allow access to the device registers.

Signed-off-by: Ofir Drang <ofir.drang@arm.com>
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Cc: stable@vger.kernel.org # v4.19+
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 120ab825

drivers/crypto/ccree/cc_pm.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -42,14 +42,15 @@ int cc_pm_resume(struct device *dev)
		struct cc_drvdata *drvdata = dev_get_drvdata(dev);

		dev_dbg(dev, "unset HOST_POWER_DOWN_EN\n");
		cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_DISABLE);

		/* Enables the device source clk */
		rc = cc_clk_on(drvdata);
		if (rc) {
		dev_err(dev, "failed getting clock back on. We're toast.\n");
		return rc;
		}

		cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_DISABLE);

		rc = init_cc_regs(drvdata, false);
		if (rc) {
		dev_err(dev, "init_cc_regs (%x)\n", rc);