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[03/23] mfd/db8500-prcmu: initialize DB8500 PRCMU regs

Message ID 1313137670-30683-1-git-send-email-linus.walleij@stericsson.com
State Accepted
Commit d65e12d70436cfb2728a78aec3f7bc1cd79eaa34
Headers show

Commit Message

Linus Walleij Aug. 12, 2011, 8:27 a.m. UTC 
From: Mattias Nilsson <mattias.i.nilsson@stericsson.com>

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>
---
 drivers/mfd/db8500-prcmu.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
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Patch

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 @@  void __init prcmu_early_init(void)
 	}
 }
 
+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 @@  static int __init db8500_prcmu_probe(struct platform_device *pdev)
 	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);