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authorLinus Walleij <linus.walleij@linaro.org>2013-03-21 15:27:25 +0400
committerLinus Walleij <linus.walleij@linaro.org>2013-04-08 15:57:27 +0400
commit9a47a8dccf8866b497bd80809da1c665e7b07c2c (patch)
tree6be1e1e5f220e804d1d0ae43a7c3fcd264a42b0b /drivers/mfd/db8500-prcmu.c
parenta937536b868b8369b98967929045f1df54234323 (diff)
downloadlinux-9a47a8dccf8866b497bd80809da1c665e7b07c2c.tar.xz
mfd: prcmu: pass a base and size with the early initcall
This patch will make an early remapping of the PRCMU, to be used when setting up the clocks, that will call down into parts of the PRCMU driver before it is probed. Going forward this will be removed like this: - The mailbox subsystem need to be merged. http://marc.info/?l=linux-kernel&m=136314559201983&w=2 - At this point the PRCMU clock code can be moved over to the ux500 clock driver in drivers/clk/ux500/* and maintained there in a decentralized manner. - This early initcall and PRCMU base parameters become part of the ux500_clk_init() call instead. Cc: Suman Anna <s-anna@ti.com> Cc: Loic Pallardy <loic.pallardy@st.com> Acked-by: Samuel Ortiz <sameo@linux.intel.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/mfd/db8500-prcmu.c')
-rw-r--r--drivers/mfd/db8500-prcmu.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
index 21f261bf9e95..0d0cc91f30e8 100644
--- a/drivers/mfd/db8500-prcmu.c
+++ b/drivers/mfd/db8500-prcmu.c
@@ -2825,8 +2825,19 @@ static void dbx500_fw_version_init(struct platform_device *pdev,
}
}
-void __init db8500_prcmu_early_init(void)
+void __init db8500_prcmu_early_init(u32 phy_base, u32 size)
{
+ /*
+ * This is a temporary remap to bring up the clocks. It is
+ * subsequently replaces with a real remap. After the merge of
+ * the mailbox subsystem all of this early code goes away, and the
+ * clock driver can probe independently. An early initcall will
+ * still be needed, but it can be diverted into drivers/clk/ux500.
+ */
+ prcmu_base = ioremap(phy_base, size);
+ if (!prcmu_base)
+ pr_err("%s: ioremap() of prcmu registers failed!\n", __func__);
+
spin_lock_init(&mb0_transfer.lock);
spin_lock_init(&mb0_transfer.dbb_irqs_lock);
mutex_init(&mb0_transfer.ac_wake_lock);