[PATCH 2/5] ARM: omap: introduce .get_voltage callback

Mike Turquette mturquette at ti.com
Wed Oct 3 21:16:02 EDT 2012

From: Mike Turquette <mturquette at linaro.org>

Introduces a new callback to struct voltagedomain for retrieving the
voltage of the voltage domain from the hardware.  This will be used to
populate voltdm->nominal_volt during initialization of the voltage code
instead of waiting for the first call to voltdm_scale.

In the event of an error or the inability to determine voltage the
callback must return zero.  It is the callers responsibility to
gracefully degrade when presented with a voltage of zero.

Signed-off-by: Mike Turquette <mturquette at ti.com>
Signed-off-by: Mike Turquette <mturquette at linaro.org>
 arch/arm/mach-omap2/voltage.h |    1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-omap2/voltage.h b/arch/arm/mach-omap2/voltage.h
index 0ac2caf..0ded54f 100644
--- a/arch/arm/mach-omap2/voltage.h
+++ b/arch/arm/mach-omap2/voltage.h
@@ -85,6 +85,7 @@ struct voltagedomain {
 		u32 rate;
 	} sys_clk;
+	unsigned long (*get_voltage) (struct voltagedomain *voltdm);
 	int (*scale) (struct voltagedomain *voltdm,
 		      unsigned long target_volt);

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