In OMAP4, a new programming model based on module control instead
of clock control was introduced.
Expose two APIs to allow the upper layer (omap_hwmod) to control
the module mode independently of the parent clocks management.
Signed-off-by: Benoit Cousson <b-cousson@xxxxxx>
Cc: Paul Walmsley <paul@xxxxxxxxx>
Cc: Rajendra Nayak <rnayak@xxxxxx>
---
arch/arm/mach-omap2/cminst44xx.c | 38 ++++++++++++++++++++++++++++++++++++++
arch/arm/mach-omap2/cminst44xx.h | 3 +++
2 files changed, 41 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/cminst44xx.c b/arch/arm/mach-omap2/cminst44xx.c
index 83498c1..3176ea6 100644
--- a/arch/arm/mach-omap2/cminst44xx.c
+++ b/arch/arm/mach-omap2/cminst44xx.c
@@ -263,3 +263,41 @@ int omap4_cm_wait_module_idle(u8 part, u16 inst, s16 cdoffs, u16 clkctrl_offs)
return (i < MAX_MODULE_READY_TIME) ? 0 : -EBUSY;
}
+
+/**
+ * omap4_cm_module_enable - Enable the modulemode inside CLKCTRL
+ * @mode: Module mode (SW or HW)
+ * @part: PRCM partition ID that the CM_CLKCTRL register exists in
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ * @clkctrl_offs: Module clock control register offset (*_CLKCTRL macro)
+ * No return value.
+ */
+void omap4_cm_module_enable(u8 mode, u8 part, u16 inst, s16 cdoffs,
+ u16 clkctrl_offs)
+{
+ u32 v;
+
+ v = omap4_cminst_read_inst_reg(part, inst, cdoffs + clkctrl_offs);
+ v &= ~OMAP4430_MODULEMODE_MASK;
+ v |= mode << OMAP4430_MODULEMODE_SHIFT;
+ omap4_cminst_write_inst_reg(v, part, inst, cdoffs + clkctrl_offs);
+}
+
+/**
+ * omap4_cm_module_disable - Disable the module inside CLKCTRL
+ * @part: PRCM partition ID that the CM_CLKCTRL register exists in
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ * @clkctrl_offs: Module clock control register offset (*_CLKCTRL macro)
+ * No return value.
+ */
+void omap4_cm_module_disable(u8 part, u16 inst, s16 cdoffs,
+ u16 clkctrl_offs)
+{
+ u32 v;
+
+ v = omap4_cminst_read_inst_reg(part, inst, cdoffs + clkctrl_offs);
+ v &= ~OMAP4430_MODULEMODE_MASK;
+ omap4_cminst_write_inst_reg(v, part, inst, cdoffs + clkctrl_offs);
+}
diff --git a/arch/arm/mach-omap2/cminst44xx.h b/arch/arm/mach-omap2/cminst44xx.h
index 4c5da7d..8034e5c 100644
--- a/arch/arm/mach-omap2/cminst44xx.h
+++ b/arch/arm/mach-omap2/cminst44xx.h
@@ -20,6 +20,9 @@ extern void omap4_cminst_clkdm_force_wakeup(u8 part, s16 inst, u16 cdoffs);
extern int omap4_cm_wait_module_ready(u8 part, u16 inst, s16 cdoffs, u16 clkctrl_offs);
extern int omap4_cm_wait_module_idle(u8 part, u16 inst, s16 cdoffs, u16 clkctrl_offs);
+extern void omap4_cm_module_enable(u8 mode, u8 part, u16 inst, s16 cdoffs, u16 clkctrl_offs);
+extern void omap4_cm_module_disable(u8 part, u16 inst, s16 cdoffs, u16 clkctrl_offs);
+
/*
* In an ideal world, we would not export these low-level functions,
* but this will probably take some time to fix properly
--
1.7.0.4
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