linux-kernel - [PATCH v3 1/3] AM35x: voltage: Basic initialization

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Date:	Thu, 22 Sep 2011 18:59:13 +0530
From:	Abhilash K V <abhilash.kv@...com>
To:	<linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
CC:	<tony@...mide.com>, <linux@....linux.org.uk>, <khilman@...com>,
	<sameo@...ux.intel.com>, <santosh.shilimkar@...com>,
	<premi@...com>, <david.woodhouse@...el.com>,
	<christian.gmeiner@...il.com>, Abhilash K V <abhilash.kv@...com>
Subject: [PATCH v3 1/3] AM35x: voltage: Basic initialization

This patch adds the basic initialization of voltage layer
for AM35x. Since AM35x doesn't support voltage scaling,
Many functions have been defined to plug into existing
voltage layer.

Signed-off-by: Sanjeev Premi <premi@...com>
Signed-off-by: Abhilash K V <abhilash.kv@...com>
---
 arch/arm/mach-omap2/omap_opp_data.h           |    1 +
 arch/arm/mach-omap2/opp3xxx_data.c            |    9 +++++++++
 arch/arm/mach-omap2/voltagedomains3xxx_data.c |   10 ++++++++--
 3 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-omap2/omap_opp_data.h b/arch/arm/mach-omap2/omap_opp_data.h
index c784c12..c7cedf3 100644
--- a/arch/arm/mach-omap2/omap_opp_data.h
+++ b/arch/arm/mach-omap2/omap_opp_data.h
@@ -88,6 +88,7 @@ extern struct omap_volt_data omap34xx_vddmpu_volt_data[];
 extern struct omap_volt_data omap34xx_vddcore_volt_data[];
 extern struct omap_volt_data omap36xx_vddmpu_volt_data[];
 extern struct omap_volt_data omap36xx_vddcore_volt_data[];
+extern struct omap_volt_data am35xx_vdd_volt_data[];
 
 extern struct omap_volt_data omap44xx_vdd_mpu_volt_data[];
 extern struct omap_volt_data omap44xx_vdd_iva_volt_data[];
diff --git a/arch/arm/mach-omap2/opp3xxx_data.c b/arch/arm/mach-omap2/opp3xxx_data.c
index d95f3f9..e4a5ee6 100644
--- a/arch/arm/mach-omap2/opp3xxx_data.c
+++ b/arch/arm/mach-omap2/opp3xxx_data.c
@@ -85,6 +85,15 @@ struct omap_volt_data omap36xx_vddcore_volt_data[] = {
 	VOLT_DATA_DEFINE(0, 0, 0, 0),
 };
 
+/* AM35x
+ *
+ * Fields related to SmartReflex and Voltage Processor are set to 0.
+ */
+struct omap_volt_data am35xx_vdd_volt_data[] = {
+	VOLT_DATA_DEFINE(OMAP3430_VDD_MPU_OPP3_UV, 0x0, 0x0, 0x0),
+	VOLT_DATA_DEFINE(0, 0, 0, 0),
+};
+
 /* OPP data */
 
 static struct omap_opp_def __initdata omap34xx_opp_def_list[] = {
diff --git a/arch/arm/mach-omap2/voltagedomains3xxx_data.c b/arch/arm/mach-omap2/voltagedomains3xxx_data.c
index 071101d..530082f 100644
--- a/arch/arm/mach-omap2/voltagedomains3xxx_data.c
+++ b/arch/arm/mach-omap2/voltagedomains3xxx_data.c
@@ -85,7 +85,10 @@ void __init omap3xxx_voltagedomains_init(void)
 	 * XXX Will depend on the process, validation, and binning
 	 * for the currently-running IC
 	 */
-	if (cpu_is_omap3630()) {
+	if (cpu_is_omap3505() || cpu_is_omap3517()) {
+		omap3_voltdm_mpu.volt_data = am35xx_vdd_volt_data;
+		omap3_voltdm_core.volt_data = am35xx_vdd_volt_data;
+	} else if (cpu_is_omap3630()) {
 		omap3_voltdm_mpu.volt_data = omap36xx_vddmpu_volt_data;
 		omap3_voltdm_core.volt_data = omap36xx_vddcore_volt_data;
 	} else {
@@ -93,8 +96,11 @@ void __init omap3xxx_voltagedomains_init(void)
 		omap3_voltdm_core.volt_data = omap34xx_vddcore_volt_data;
 	}
 
-	for (i = 0; voltdm = voltagedomains_omap3[i], voltdm; i++)
+	for (i = 0; voltdm = voltagedomains_omap3[i], voltdm; i++) {
+		if (cpu_is_omap3505() || cpu_is_omap3517())
+			voltdm->scalable = false;
 		voltdm->sys_clk.name = sys_clk_name;
+	}
 
 	voltdm_init(voltagedomains_omap3);
 };
-- 
1.7.1

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