imx: Support i.MX6 High Assurance Boot authentication

[karo-tx-uboot.git] / arch / arm / cpu / armv7 / mx6 / clock.c

diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
index 336e557a27d68ddfb2c52875aeb9b7c0a4c0091f..d200531030e730301574f27943757ec50ab4f763 100644 (file)
--- a/arch/arm/cpu/armv7/mx6/clock.c
+++ b/arch/arm/cpu/armv7/mx6/clock.c
@@ -642,6 +642,33 @@ int enable_pcie_clock(void)
                               BM_ANADIG_PLL_ENET_ENABLE_PCIE);
 }
 
+#ifdef CONFIG_SECURE_BOOT
+void hab_caam_clock_enable(unsigned char enable)
+{
+       u32 reg;
+
+       /* CG4 ~ CG6, CAAM clocks */
+       reg = __raw_readl(&imx_ccm->CCGR0);
+       if (enable)
+               reg |= (MXC_CCM_CCGR0_CAAM_WRAPPER_IPG_MASK |
+                       MXC_CCM_CCGR0_CAAM_WRAPPER_ACLK_MASK |
+                       MXC_CCM_CCGR0_CAAM_SECURE_MEM_MASK);
+       else
+               reg &= ~(MXC_CCM_CCGR0_CAAM_WRAPPER_IPG_MASK |
+                       MXC_CCM_CCGR0_CAAM_WRAPPER_ACLK_MASK |
+                       MXC_CCM_CCGR0_CAAM_SECURE_MEM_MASK);
+       __raw_writel(reg, &imx_ccm->CCGR0);
+
+       /* EMI slow clk */
+       reg = __raw_readl(&imx_ccm->CCGR6);
+       if (enable)
+               reg |= MXC_CCM_CCGR6_EMI_SLOW_MASK;
+       else
+               reg &= ~MXC_CCM_CCGR6_EMI_SLOW_MASK;
+       __raw_writel(reg, &imx_ccm->CCGR6);
+}
+#endif
+
 unsigned int mxc_get_clock(enum mxc_clock clk)
 {
        switch (clk) {