mfd: Initialize DB8500 PRCMU regs
Some clocks may be force enabled when we probe the
driver, but they need to be turned off by default so
we have a known state. We call this the register
initialization function if we need more stuff in
there in the future.
Signed-off-by: Mattias Nilsson <mattias.i.nilsson@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
index dcc690e..e2c4a26 100644
--- a/drivers/mfd/db8500-prcmu.c
+++ b/drivers/mfd/db8500-prcmu.c
@@ -1840,6 +1840,16 @@
}
}
+static void __init init_prcm_registers(void)
+{
+ u32 val;
+
+ val = readl(PRCM_A9PL_FORCE_CLKEN);
+ val &= ~(PRCM_A9PL_FORCE_CLKEN_PRCM_A9PL_FORCE_CLKEN |
+ PRCM_A9PL_FORCE_CLKEN_PRCM_A9AXI_FORCE_CLKEN);
+ writel(val, (PRCM_A9PL_FORCE_CLKEN));
+}
+
/*
* Power domain switches (ePODs) modeled as regulators for the DB8500 SoC
*/
@@ -2038,6 +2048,8 @@
if (ux500_is_svp())
return -ENODEV;
+ init_prcm_registers();
+
/* Clean up the mailbox interrupts after pre-kernel code. */
writel(ALL_MBOX_BITS, PRCM_ARM_IT1_CLR);