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authorLinus Torvalds <torvalds@linux-foundation.org>2011-03-18 03:28:15 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-18 03:28:15 +0100
commit0df0914d414a504b975f3cc66ace0c16ef55b7f3 (patch)
treec97ffa357943a8b226cdec1b9632c4cede813205 /arch/arm/mach-omap2/clkt2xxx_dpll.c
parentMerge branch 'for-linus' of git://codeaurora.org/quic/kernel/davidb/linux-msm (diff)
parentMerge branches 'devel-mux' and 'devel-misc' into omap-for-linus (diff)
downloadlinux-0df0914d414a504b975f3cc66ace0c16ef55b7f3.tar.xz
linux-0df0914d414a504b975f3cc66ace0c16ef55b7f3.zip
Merge branch 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6
* 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: (258 commits) omap: zoom: host should not pull up wl1271's irq line arm: plat-omap: iommu: fix request_mem_region() error path OMAP2+: Common CPU DIE ID reading code reads wrong registers for OMAP4430 omap4: mux: Remove duplicate mux modes omap: iovmm: don't check 'da' to set IOVMF_DA_FIXED flag omap: iovmm: disallow mapping NULL address when IOVMF_DA_ANON is set omap2+: mux: Fix compile when CONFIG_OMAP_MUX is not selected omap4: board-omap4panda: Initialise the serial pads omap3: board-3430sdp: Initialise the serial pads omap4: board-4430sdp: Initialise the serial pads omap2+: mux: Add macro for configuring static with omap_hwmod_mux_init omap2+: mux: Remove the use of IDLE flag omap2+: Add separate list for dynamic pads to mux perf: add OMAP support for the new power events OMAP4: Add IVA OPP enteries. OMAP4: Update Voltage Rail Values for MPU, IVA and CORE OMAP4: Enable 800 MHz and 1 GHz MPU-OPP OMAP3+: OPP: Replace voltage values with Macros OMAP3: wdtimer: Fix CORE idle transition Watchdog: omap_wdt: add fine grain runtime-pm ... Fix up various conflicts in - arch/arm/mach-omap2/board-omap3evm.c - arch/arm/mach-omap2/clock3xxx_data.c - arch/arm/mach-omap2/usb-musb.c - arch/arm/plat-omap/include/plat/usb.h - drivers/usb/musb/musb_core.h
Diffstat (limited to 'arch/arm/mach-omap2/clkt2xxx_dpll.c')
-rw-r--r--arch/arm/mach-omap2/clkt2xxx_dpll.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/clkt2xxx_dpll.c b/arch/arm/mach-omap2/clkt2xxx_dpll.c
new file mode 100644
index 000000000000..1502a7bc20bb
--- /dev/null
+++ b/arch/arm/mach-omap2/clkt2xxx_dpll.c
@@ -0,0 +1,63 @@
+/*
+ * OMAP2-specific DPLL control functions
+ *
+ * Copyright (C) 2011 Nokia Corporation
+ * Paul Walmsley
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+
+#include <plat/clock.h>
+
+#include "clock.h"
+#include "cm2xxx_3xxx.h"
+#include "cm-regbits-24xx.h"
+
+/* Private functions */
+
+/**
+ * _allow_idle - enable DPLL autoidle bits
+ * @clk: struct clk * of the DPLL to operate on
+ *
+ * Enable DPLL automatic idle control. The DPLL will enter low-power
+ * stop when its downstream clocks are gated. No return value.
+ * REVISIT: DPLL can optionally enter low-power bypass by writing 0x1
+ * instead. Add some mechanism to optionally enter this mode.
+ */
+static void _allow_idle(struct clk *clk)
+{
+ if (!clk || !clk->dpll_data)
+ return;
+
+ omap2xxx_cm_set_dpll_auto_low_power_stop();
+}
+
+/**
+ * _deny_idle - prevent DPLL from automatically idling
+ * @clk: struct clk * of the DPLL to operate on
+ *
+ * Disable DPLL automatic idle control. No return value.
+ */
+static void _deny_idle(struct clk *clk)
+{
+ if (!clk || !clk->dpll_data)
+ return;
+
+ omap2xxx_cm_set_dpll_disable_autoidle();
+}
+
+
+/* Public data */
+
+const struct clkops clkops_omap2xxx_dpll_ops = {
+ .allow_idle = _allow_idle,
+ .deny_idle = _deny_idle,
+};
+