[RFC 4/9] ARM: dts: AM33XX: Add opp-modifier device entry and add higher OPPs

Dave Gerlach
2014-03-14T19:25:30Z

Add an entry for opp_modifier which configures OPPs on am33xx. Within this
nodes are defined with opp-modifier propety that are defined as a list
of frequency, offset from base register, and efuse value. The CPU node
passes a phandle to the appropriate child node of the efuse node.

This patch also adds the ES2.x OPPs for am33xx.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
---
arch/arm/boot/dts/am33xx.dtsi | 27 +++++++++++++++++++++++++--
include/dt-bindings/opp/ti.h | 22 ++++++++++++++++++++++
2 files changed, 47 insertions(+), 2 deletions(-)
create mode 100644 include/dt-bindings/opp/ti.h

diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
index 6d95d3d..a09f4fb 100644
--- a/arch/arm/boot/dts/am33xx.dtsi
+++ b/arch/arm/boot/dts/am33xx.dtsi
@@ -10,6 +10,7 @@

#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/pinctrl/am33xx.h>
+#include <dt-bindings/opp/ti.h>

#include "skeleton.dtsi"

@@ -52,12 +53,17 @@
*/
operating-points = <
/* kHz uV */
+ 1000000 1351000
+ 800000 1285000
720000 1285000
600000 1225000
- 500000 1125000
- 275000 1125000
+ 300000 1125000
>;
+
voltage-tolerance = <2>; /* 2 percentage */
+
+ platform-opp-modifier = <&mpu_opp_modifier>;
+
clock-latency = <300000>; /* From omap-cpufreq driver */
};
};
@@ -818,6 +824,23 @@
reg = <0x48310000 0x2000>;
interrupts = <111>;
};
+
+ opp_modifier: opp_modifier@0x44e107fc {
+ compatible = "opp-modifier-reg-bit";
+ reg = <0x44e107fc 0x04>;
+
+ opp,reg-bit-enable-low;
+
+ mpu_opp_modifier: mpu_opp_modifier {
+ opp-modifier = <
+ /* kHz offset value */
+ 1000000 0 AM33XX_EFUSE_SMA_OPP_NITRO_1GHZ_BIT
+ 800000 0 AM33XX_EFUSE_SMA_OPP_TURBO_800MHZ_BIT
+ 720000 0 AM33XX_EFUSE_SMA_OPP_120_720MHZ_BIT
+ 600000 0 AM33XX_EFUSE_SMA_OPP_100_600MHZ_BIT
+ >;
+ };
+ };
};
};

diff --git a/include/dt-bindings/opp/ti.h b/include/dt-bindings/opp/ti.h
new file mode 100644
index 0000000..58436c1
--- /dev/null
+++ b/include/dt-bindings/opp/ti.h
@@ -0,0 +1,22 @@
+/*
+ * This header provides constants for TI SoC OPP bindings.
+ *
+ * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * 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.
+ *
+ */
+
+#ifndef __DT_BINDINGS_OPP_TI_H__
+#define __DT_BINDINGS_OPP_TI_H__
+
+#define AM33XX_EFUSE_SMA_OPP_50_300MHZ_BIT (1 << 4)
+#define AM33XX_EFUSE_SMA_OPP_100_300MHZ_BIT (1 << 5)
+#define AM33XX_EFUSE_SMA_OPP_100_600MHZ_BIT (1 << 6)
+#define AM33XX_EFUSE_SMA_OPP_120_720MHZ_BIT (1 << 7)
+#define AM33XX_EFUSE_SMA_OPP_TURBO_800MHZ_BIT (1 << 8)
+#define AM33XX_EFUSE_SMA_OPP_NITRO_1GHZ_BIT (1 << 9)
+
+#endif /* __DT_BINDINGS_OPP_TI_H__ */
--
1.9.0