ARM: OMAP AM33xx: clockdomains: Add clockdomain data and respective operations

AM33XX PRCM module consists of various clockdomains, in all
total we have 18 clockdomains available, with following
controlling options,
   - SW Sleep: sw forced sleep transition
   - SW Wakeup: sw forced wakeup transition

This patch adds all available clockdomain data, respective
clockdomain operations for AM33XX family of device, and also
integrates it into existing OMAP framework.

Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Afzal Mohammed <afzal@ti.com>
Signed-off-by: Vaibhav Bedia <vaibhav.bedia@ti.com>
Cc: Kevin Hilman <khilman@ti.com>
Cc: Rajendra Nayak <rnayak@ti.com>
CC: Tony Lindgren <tony@atomide.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Benoit Cousson <b-cousson@ti.com>
[paul@pwsan.com: removed CLKDM_NO_AUTODEPS from clockdomain flags, removed
 unnecessary .clktrctrl_offs field; updated for 3.5]
Signed-off-by: Paul Walmsley <paul@pwsan.com>

5 files changed, 275 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index b664dc8722aa..a4cf93242b0b 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -133,6 +133,8 @@ obj-$(CONFIG_ARCH_OMAP3)		+= clockdomains3xxx_data.o
 obj-$(CONFIG_ARCH_OMAP4)                += $(clockdomain-common)
 obj-$(CONFIG_ARCH_OMAP4)                += clockdomain44xx.o
 obj-$(CONFIG_ARCH_OMAP4)                += clockdomains44xx_data.o
+obj-$(CONFIG_SOC_AM33XX)                += clockdomain33xx.o
+obj-$(CONFIG_SOC_AM33XX)                += clockdomains33xx_data.o
 
 # Clock framework
 obj-$(CONFIG_ARCH_OMAP2)                += $(clock-common) clock2xxx.o
diff --git a/arch/arm/mach-omap2/clockdomain.h b/arch/arm/mach-omap2/clockdomain.h
index f7b58609bad8..72cb12bbb9c3 100644
--- a/arch/arm/mach-omap2/clockdomain.h
+++ b/arch/arm/mach-omap2/clockdomain.h
@@ -195,6 +195,7 @@ int clkdm_hwmod_disable(struct clockdomain *clkdm, struct omap_hwmod *oh);
 extern void __init omap242x_clockdomains_init(void);
 extern void __init omap243x_clockdomains_init(void);
 extern void __init omap3xxx_clockdomains_init(void);
+extern void __init am33xx_clockdomains_init(void);
 extern void __init omap44xx_clockdomains_init(void);
 extern void _clkdm_add_autodeps(struct clockdomain *clkdm);
 extern void _clkdm_del_autodeps(struct clockdomain *clkdm);
@@ -202,6 +203,7 @@ extern void _clkdm_del_autodeps(struct clockdomain *clkdm);
 extern struct clkdm_ops omap2_clkdm_operations;
 extern struct clkdm_ops omap3_clkdm_operations;
 extern struct clkdm_ops omap4_clkdm_operations;
+extern struct clkdm_ops am33xx_clkdm_operations;
 
 extern struct clkdm_dep gfx_24xx_wkdeps[];
 extern struct clkdm_dep dsp_24xx_wkdeps[];
diff --git a/arch/arm/mach-omap2/clockdomain33xx.c b/arch/arm/mach-omap2/clockdomain33xx.c
new file mode 100644
index 000000000000..aca6388fad76
--- /dev/null
+++ b/arch/arm/mach-omap2/clockdomain33xx.c
@@ -0,0 +1,74 @@
+/*
+ * AM33XX clockdomain control
+ *
+ * Copyright (C) 2011-2012 Texas Instruments Incorporated - http://www.ti.com/
+ * Vaibhav Hiremath <hvaibhav@ti.com>
+ *
+ * Derived from mach-omap2/clockdomain44xx.c written by Rajendra Nayak
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+
+#include "clockdomain.h"
+#include "cm33xx.h"
+
+
+static int am33xx_clkdm_sleep(struct clockdomain *clkdm)
+{
+        am33xx_cm_clkdm_force_sleep(clkdm->cm_inst, clkdm->clkdm_offs);
+        return 0;
+}
+
+static int am33xx_clkdm_wakeup(struct clockdomain *clkdm)
+{
+        am33xx_cm_clkdm_force_wakeup(clkdm->cm_inst, clkdm->clkdm_offs);
+        return 0;
+}
+
+static void am33xx_clkdm_allow_idle(struct clockdomain *clkdm)
+{
+        am33xx_cm_clkdm_enable_hwsup(clkdm->cm_inst, clkdm->clkdm_offs);
+}
+
+static void am33xx_clkdm_deny_idle(struct clockdomain *clkdm)
+{
+        am33xx_cm_clkdm_disable_hwsup(clkdm->cm_inst, clkdm->clkdm_offs);
+}
+
+static int am33xx_clkdm_clk_enable(struct clockdomain *clkdm)
+{
+        if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)
+                return am33xx_clkdm_wakeup(clkdm);
+
+        return 0;
+}
+
+static int am33xx_clkdm_clk_disable(struct clockdomain *clkdm)
+{
+        bool hwsup = false;
+
+        hwsup = am33xx_cm_is_clkdm_in_hwsup(clkdm->cm_inst, clkdm->clkdm_offs);
+
+        if (!hwsup && (clkdm->flags & CLKDM_CAN_FORCE_SLEEP))
+                am33xx_clkdm_sleep(clkdm);
+
+        return 0;
+}
+
+struct clkdm_ops am33xx_clkdm_operations = {
+        .clkdm_sleep            = am33xx_clkdm_sleep,
+        .clkdm_wakeup           = am33xx_clkdm_wakeup,
+        .clkdm_allow_idle       = am33xx_clkdm_allow_idle,
+        .clkdm_deny_idle        = am33xx_clkdm_deny_idle,
+        .clkdm_clk_enable       = am33xx_clkdm_clk_enable,
+        .clkdm_clk_disable      = am33xx_clkdm_clk_disable,
+};
diff --git a/arch/arm/mach-omap2/clockdomains33xx_data.c b/arch/arm/mach-omap2/clockdomains33xx_data.c
new file mode 100644
index 000000000000..32c90fd9eba2
--- /dev/null
+++ b/arch/arm/mach-omap2/clockdomains33xx_data.c
@@ -0,0 +1,196 @@
+/*
+ * AM33XX Clock Domain data.
+ *
+ * Copyright (C) 2011-2012 Texas Instruments Incorporated - http://www.ti.com/
+ * Vaibhav Hiremath <hvaibhav@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/io.h>
+
+#include "clockdomain.h"
+#include "cm.h"
+#include "cm33xx.h"
+#include "cm-regbits-33xx.h"
+
+static struct clockdomain l4ls_am33xx_clkdm = {
+        .name           = "l4ls_clkdm",
+        .pwrdm          = { .name = "per_pwrdm" },
+        .cm_inst        = AM33XX_CM_PER_MOD,
+        .clkdm_offs     = AM33XX_CM_PER_L4LS_CLKSTCTRL_OFFSET,
+        .flags          = CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain l3s_am33xx_clkdm = {
+        .name           = "l3s_clkdm",
+        .pwrdm          = { .name = "per_pwrdm" },
+        .cm_inst        = AM33XX_CM_PER_MOD,
+        .clkdm_offs     = AM33XX_CM_PER_L3S_CLKSTCTRL_OFFSET,
+        .flags          = CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain l4fw_am33xx_clkdm = {
+        .name           = "l4fw_clkdm",
+        .pwrdm          = { .name = "per_pwrdm" },
+        .cm_inst        = AM33XX_CM_PER_MOD,
+        .clkdm_offs     = AM33XX_CM_PER_L4FW_CLKSTCTRL_OFFSET,
+        .flags          = CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain l3_am33xx_clkdm = {
+        .name           = "l3_clkdm",
+        .pwrdm          = { .name = "per_pwrdm" },
+        .cm_inst        = AM33XX_CM_PER_MOD,
+        .clkdm_offs     = AM33XX_CM_PER_L3_CLKSTCTRL_OFFSET,
+        .flags          = CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain l4hs_am33xx_clkdm = {
+        .name           = "l4hs_clkdm",
+        .pwrdm          = { .name = "per_pwrdm" },
+        .cm_inst        = AM33XX_CM_PER_MOD,
+        .clkdm_offs     = AM33XX_CM_PER_L4HS_CLKSTCTRL_OFFSET,
+        .flags          = CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain ocpwp_l3_am33xx_clkdm = {
+        .name           = "ocpwp_l3_clkdm",
+        .pwrdm          = { .name = "per_pwrdm" },
+        .cm_inst        = AM33XX_CM_PER_MOD,
+        .clkdm_offs     = AM33XX_CM_PER_OCPWP_L3_CLKSTCTRL_OFFSET,
+        .flags          = CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain pruss_ocp_am33xx_clkdm = {
+        .name           = "pruss_ocp_clkdm",
+        .pwrdm          = { .name = "per_pwrdm" },
+        .cm_inst        = AM33XX_CM_PER_MOD,
+        .clkdm_offs     = AM33XX_CM_PER_PRUSS_CLKSTCTRL_OFFSET,
+        .flags          = CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain cpsw_125mhz_am33xx_clkdm = {
+        .name           = "cpsw_125mhz_clkdm",
+        .pwrdm          = { .name = "per_pwrdm" },
+        .cm_inst        = AM33XX_CM_PER_MOD,
+        .clkdm_offs     = AM33XX_CM_PER_CPSW_CLKSTCTRL_OFFSET,
+        .flags          = CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain lcdc_am33xx_clkdm = {
+        .name           = "lcdc_clkdm",
+        .pwrdm          = { .name = "per_pwrdm" },
+        .cm_inst        = AM33XX_CM_PER_MOD,
+        .clkdm_offs     = AM33XX_CM_PER_LCDC_CLKSTCTRL_OFFSET,
+        .flags          = CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain clk_24mhz_am33xx_clkdm = {
+        .name           = "clk_24mhz_clkdm",
+        .pwrdm          = { .name = "per_pwrdm" },
+        .cm_inst        = AM33XX_CM_PER_MOD,
+        .clkdm_offs     = AM33XX_CM_PER_CLK_24MHZ_CLKSTCTRL_OFFSET,
+        .flags          = CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain l4_wkup_am33xx_clkdm = {
+        .name           = "l4_wkup_clkdm",
+        .pwrdm          = { .name = "wkup_pwrdm" },
+        .cm_inst        = AM33XX_CM_WKUP_MOD,
+        .clkdm_offs     = AM33XX_CM_WKUP_CLKSTCTRL_OFFSET,
+        .flags          = CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain l3_aon_am33xx_clkdm = {
+        .name           = "l3_aon_clkdm",
+        .pwrdm          = { .name = "wkup_pwrdm" },
+        .cm_inst        = AM33XX_CM_WKUP_MOD,
+        .clkdm_offs     = AM33XX_CM_L3_AON_CLKSTCTRL_OFFSET,
+        .flags          = CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain l4_wkup_aon_am33xx_clkdm = {
+        .name           = "l4_wkup_aon_clkdm",
+        .pwrdm          = { .name = "wkup_pwrdm" },
+        .cm_inst        = AM33XX_CM_WKUP_MOD,
+        .clkdm_offs     = AM33XX_CM_L4_WKUP_AON_CLKSTCTRL_OFFSET,
+        .flags          = CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain mpu_am33xx_clkdm = {
+        .name           = "mpu_clkdm",
+        .pwrdm          = { .name = "mpu_pwrdm" },
+        .cm_inst        = AM33XX_CM_MPU_MOD,
+        .clkdm_offs     = AM33XX_CM_MPU_CLKSTCTRL_OFFSET,
+        .flags          = CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain l4_rtc_am33xx_clkdm = {
+        .name           = "l4_rtc_clkdm",
+        .pwrdm          = { .name = "rtc_pwrdm" },
+        .cm_inst        = AM33XX_CM_RTC_MOD,
+        .clkdm_offs     = AM33XX_CM_RTC_CLKSTCTRL_OFFSET,
+        .flags          = CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain gfx_l3_am33xx_clkdm = {
+        .name           = "gfx_l3_clkdm",
+        .pwrdm          = { .name = "gfx_pwrdm" },
+        .cm_inst        = AM33XX_CM_GFX_MOD,
+        .clkdm_offs     = AM33XX_CM_GFX_L3_CLKSTCTRL_OFFSET,
+        .flags          = CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain gfx_l4ls_gfx_am33xx_clkdm = {
+        .name           = "gfx_l4ls_gfx_clkdm",
+        .pwrdm          = { .name = "gfx_pwrdm" },
+        .cm_inst        = AM33XX_CM_GFX_MOD,
+        .clkdm_offs     = AM33XX_CM_GFX_L4LS_GFX_CLKSTCTRL__1_OFFSET,
+        .flags          = CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain l4_cefuse_am33xx_clkdm = {
+        .name           = "l4_cefuse_clkdm",
+        .pwrdm          = { .name = "cefuse_pwrdm" },
+        .cm_inst        = AM33XX_CM_CEFUSE_MOD,
+        .clkdm_offs     = AM33XX_CM_CEFUSE_CLKSTCTRL_OFFSET,
+        .flags          = CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain *clockdomains_am33xx[] __initdata = {
+        &l4ls_am33xx_clkdm,
+        &l3s_am33xx_clkdm,
+        &l4fw_am33xx_clkdm,
+        &l3_am33xx_clkdm,
+        &l4hs_am33xx_clkdm,
+        &ocpwp_l3_am33xx_clkdm,
+        &pruss_ocp_am33xx_clkdm,
+        &cpsw_125mhz_am33xx_clkdm,
+        &lcdc_am33xx_clkdm,
+        &clk_24mhz_am33xx_clkdm,
+        &l4_wkup_am33xx_clkdm,
+        &l3_aon_am33xx_clkdm,
+        &l4_wkup_aon_am33xx_clkdm,
+        &mpu_am33xx_clkdm,
+        &l4_rtc_am33xx_clkdm,
+        &gfx_l3_am33xx_clkdm,
+        &gfx_l4ls_gfx_am33xx_clkdm,
+        &l4_cefuse_am33xx_clkdm,
+        NULL,
+};
+
+void __init am33xx_clockdomains_init(void)
+{
+        clkdm_register_platform_funcs(&am33xx_clkdm_operations);
+        clkdm_register_clkdms(clockdomains_am33xx);
+        clkdm_complete_init();
+}
diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
index 3c885248b984..cb6c11cd8df9 100644
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -486,6 +486,7 @@ void __init am33xx_init_early(void)
         omap_common_init_early();
         am33xx_voltagedomains_init();
         am33xx_powerdomains_init();
+        am33xx_clockdomains_init();
 }
 #endif