[AM335X][VOLTDM] Create voltdm support for AM335X

Create voltage domain functions and definitions for the AM335X to
support the show opp command. Update the common voltage domain files
to support the AM335X voltdm functions.

Signed-off-by: Gilberto Rodriguez <gilrod@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>

Makefile

@@ -271,6 +271,7 @@ AM335XSOURCES=\
 		arch/arm/mach-omap/am335x/prcm/prm_am335x.c\
 		arch/arm/mach-omap/am335x/prcm/prcm_am335x.c\
 		arch/arm/mach-omap/am335x/prcm/clock_am335x.c\
+		arch/arm/mach-omap/am335x/prcm/voltdm_am335x.c\
 		arch/arm/mach-omap/am335x/dpll/dpll_am335x-data.c\
 		arch/arm/mach-omap/am335x/dpll/dpll_am335x.c\
 

arch/arm/mach-omap/am335x/prcm/voltdm_am335x.c

@@ -0,0 +1,255 @@
+/*
+ *
+ * @Component			OMAPCONF
+ * @Filename			voltdm_am335x.c
+ * @Description			AM335X Voltage Domain Definitions & APIs
+ * @Author			Gilberto Rodriguez <gilrod@ti.com>
+ * @Date			2014
+ * @Copyright			Texas Instruments Incorporated
+ *
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *
+ *    Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ *    Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the
+ *    distribution.
+ *
+ *    Neither the name of Texas Instruments Incorporated nor the names of
+ *    its contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+
+#include <autoadjust_table.h>
+#include <clock_am335x.h>
+#include <cpuinfo.h>
+#include <dpll_am335x.h>
+#include <opp.h>
+#include <pmic.h>
+#include <prm_am335x-defs.h>
+#include <pwrdm.h>
+#include <reg.h>
+#include <voltdm_am335x.h>
+#include <voltdomain.h>
+
+
+#ifdef VOLTDM_AM335X_DEBUG
+#define dprintf(format, ...)	 printf(format, ## __VA_ARGS__)
+#else
+#define dprintf(format, ...)
+#endif
+
+
+static const char
+	voltdm_am335x_names_table[VDD_AM335X_ID_MAX][VOLTDM_MAX_NAME_LENGTH] = {
+	[VDD_AM335X_CORE] = "VDD_CORE",
+	[VDD_AM335X_MPU] = "VDD_MPU",
+	[VDD_AM335X_RTC] = "VDD_RTC"};
+
+
+static unsigned short voltdm_am335x_init_done;
+genlist voltdm_am335x_list;
+
+
+/* ------------------------------------------------------------------------*//**
+ * @FUNCTION		voltdm_am335x_init
+ * @BRIEF		initialize internal data
+ * @DESCRIPTION		initialize internal data (architecture dependent)
+ *//*------------------------------------------------------------------------ */
+void voltdm_am335x_init(void)
+{
+	voltdm_info voltdm;
+
+	if (voltdm_am335x_init_done)
+		return;
+
+	genlist_init(&voltdm_am335x_list);
+
+	voltdm.name = VDD_CORE;
+	voltdm.id = (int) VDD_AM335X_CORE;
+	voltdm.voltst = NULL;
+	genlist_addtail(
+		&voltdm_am335x_list, (void *) &voltdm, sizeof(voltdm_info));
+
+	voltdm.name = VDD_MPU;
+	voltdm.id = (int) VDD_AM335X_MPU;
+	voltdm.voltst = NULL;
+	genlist_addtail(
+		&voltdm_am335x_list, (void *) &voltdm, sizeof(voltdm_info));
+
+	voltdm.name = VDD_RTC;
+	voltdm.id = (int) VDD_AM335X_RTC;
+	voltdm.voltst = NULL;
+	genlist_addtail(
+		&voltdm_am335x_list, (void *) &voltdm, sizeof(voltdm_info));
+
+	voltdm_am335x_init_done = 1;
+	dprintf("%s(): init done.\n", __func__);
+}
+
+
+/* ------------------------------------------------------------------------*//**
+ * @FUNCTION		voltdm_am335x_deinit
+ * @BRIEF		free dynamically allocated internal data.
+ * @DESCRIPTION		free dynamically allocated internal data.
+ *			MUST BE CALLED AT END OF EXECUTION.
+ *//*------------------------------------------------------------------------ */
+void voltdm_am335x_deinit(void)
+{
+	if (voltdm_am335x_init_done) {
+		genlist_free(&voltdm_am335x_list);
+		voltdm_am335x_init_done = 0;
+	}
+	dprintf("%s(): deinit done.\n", __func__);
+}
+
+
+/* ------------------------------------------------------------------------*//**
+ * @FUNCTION		voltdm_am335x_list_get
+ * @BRIEF		return the list of voltage domains
+ * @RETURNS		list of voltage domains in case of success
+ *			NULL in case of error
+ * @DESCRIPTION		return the list of voltage domains
+ *//*------------------------------------------------------------------------ */
+const genlist *voltdm_am335x_list_get(void)
+{
+	voltdm_am335x_init();
+
+	return (const genlist *) &voltdm_am335x_list;
+}
+
+
+/* ------------------------------------------------------------------------*//**
+ * @FUNCTION		voltdm_am335x_count_get
+ * @BRIEF		return the number of voltage domains
+ * @RETURNS		number of voltage domains (> 0) in case of success
+ *			OMAPCONF_ERR_CPU
+ *			OMAPCONF_ERR_ARG
+ * @DESCRIPTION		return the number of voltage domains
+ *//*------------------------------------------------------------------------ */
+int voltdm_am335x_count_get(void)
+{
+	int count;
+
+	voltdm_am335x_init();
+
+	count = genlist_getcount(&voltdm_am335x_list);
+
+	dprintf("%s() = %d\n", __func__, count);
+	return count;
+}
+
+
+/* ------------------------------------------------------------------------*//**
+ * @FUNCTION		voltdm_am335x_name_get
+ * @BRIEF		return voltage domain name
+ * @RETURNS		voltage domain name on success
+ *			NULL in case of error
+ * @param[in]		id: valid voltage domain ID
+ * @DESCRIPTION		return voltage domain name
+ *//*------------------------------------------------------------------------ */
+const char *voltdm_am335x_name_get(voltdm_am335x_id id)
+{
+	CHECK_ARG_LESS_THAN(id, VDD_AM335X_ID_MAX, NULL);
+
+	return voltdm_am335x_names_table[id];
+}
+
+
+/* ------------------------------------------------------------------------*//**
+ * @FUNCTION		voltdm_am335x_id2s
+ * @BRIEF		convert voltage domain ID into voltage domain name, as
+ *			defined in voltdm.h.
+ * @RETURNS		Voltage Domain name, as defined in voltdm.h.
+ *			NULL in case of invalid voltage domain ID
+ * @param[in]		id: voltage domain ID
+ * @DESCRIPTION		convert voltage domain ID to voltage domain name.
+ *//*------------------------------------------------------------------------ */
+const char *voltdm_am335x_id2s(voltdm_am335x_id id)
+{
+	const char *s;
+	CHECK_ARG_LESS_THAN(id, VDD_AM335X_ID_MAX, NULL);
+
+	switch (id) {
+	case VDD_AM335X_CORE:
+		s = VDD_CORE;
+		break;
+	case VDD_AM335X_MPU:
+		s = VDD_MPU;
+		break;
+	case VDD_AM335X_RTC:
+		s = VDD_RTC;
+		break;
+	default:
+		s = NULL;
+	}
+
+	dprintf("%s(%d) = %s\n", __func__, id, s);
+	return s;
+}
+
+
+/* ------------------------------------------------------------------------*//**
+ * @FUNCTION		voltdm_am335x_voltage_get
+ * @BRIEF		find the current supply voltage of a domain
+ * @RETURNS		supply voltage in case of success (>= 0.0)
+ *			OMAPCONF_ERR_ARG
+ *			OMAPCONF_ERR_CPU
+ *			OMAPCONF_ERR_REG_ACCESS
+ *			OMAPCONF_ERR_NOT_AVAILABLE
+ * @param[in]		id: valid voltage domain ID
+ * @DESCRIPTION		find the current supply voltage of a domain,
+ *			taking care of the voltage domain state
+ *			(ON/ON_LP/RET/OFF)
+ *			NB: use PRCM VP VOLTAGE register to retrieve ON voltage.
+ *			Hence SR/VP/VC have to be at least initialized
+ *			(SR could be disabled)
+ *//*------------------------------------------------------------------------ */
+double voltdm_am335x_voltage_get(voltdm_am335x_id id)
+{
+	double volt;
+
+	CHECK_ARG_LESS_THAN(id, VDD_AM335X_ID_MAX, (double) OMAPCONF_ERR_ARG);
+
+	switch (id) {
+	case VDD_AM335X_CORE:
+		volt = smps_voltage_get(PMIC_SMPS_CORE);
+		break;
+
+	case VDD_AM335X_MPU:
+		volt = smps_voltage_get(PMIC_SMPS_MPU);
+		break;
+
+	case VDD_AM335X_RTC:
+		volt = smps_voltage_get(PMIC_SMPS_ID_MAX);
+		break;
+
+	default:
+		return (double) OMAPCONF_ERR_ARG;
+	}
+
+	dprintf("%s(%s): volt=%lfV\n", __func__, voltdm_am335x_name_get(id), volt);
+	return volt;
+}

arch/arm/mach-omap/am335x/prcm/voltdm_am335x.h

@@ -0,0 +1,73 @@
+/*
+ *
+ * @Component			OMAPCONF
+ * @Filename			voltdm_am335x.h
+ * @Description			AM335X Voltage Domain Definitions & APIs
+ * @Author			Gilberto Rodriguez <gilrod@ti.com>
+ * @Date			2014
+ * @Copyright			Texas Instruments Incorporated
+ *
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *
+ *    Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ *    Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the
+ *    distribution.
+ *
+ *    Neither the name of Texas Instruments Incorporated nor the names of
+ *    its contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+
+#ifndef __VOLTDM_AM335X_H__
+#define __VOLTDM_AM335X_H__
+
+
+#include <lib.h>
+#include <genlist.h>
+
+
+typedef enum {
+	VDD_AM335X_CORE,
+	VDD_AM335X_MPU,
+	VDD_AM335X_RTC,
+	VDD_AM335X_ID_MAX
+} voltdm_am335x_id;
+
+
+void voltdm_am335x_init(void);
+void voltdm_am335x_deinit(void);
+
+const genlist *voltdm_am335x_list_get(void);
+int voltdm_am335x_count_get(void);
+
+const char *voltdm_am335x_name_get(voltdm_am335x_id id);
+const char *voltdm_am335x_id2s(voltdm_am335x_id id);
+
+double voltdm_am335x_voltage_get(voltdm_am335x_id id);
+
+
+#endif