arm: omap: Unify get_device_type() function

Refactor OMAP3/4/5 code so that we have only one get_device_type()
function for all platforms.

Details:
 - Add ctrl variable for AM33xx and OMAP3 platforms (like it's done for
   OMAP4/5), so we can obtain status register in common way
 - For now ctrl structure for AM33xx/OMAP3 contains only status register
   address
 - Run hw_data_init() in order to assign ctrl to proper structure
 - Remove DEVICE_MASK and DEVICE_GP definitions as they are not used
   (DEVICE_TYPE_MASK and GP_DEVICE are used instead)
 - Guard structs in omap_common.h with #ifdefs, because otherwise
   including omap_common.h on non-omap4/5 board files breaks compilation

Buildman script was run for all OMAP boards. Result output:
    arm: (for 38/616 boards)
        all +352.5
        bss -1.4
        data +3.5
        rodata +300.0
        spl/u-boot-spl:all +284.7
        spl/u-boot-spl:data +2.2
        spl/u-boot-spl:rodata +252.0
        spl/u-boot-spl:text +30.5
        text +50.4
    (no errors to report)

Tested on AM57x EVM and BeagleBoard xM.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
[trini: Rework the guards as to not break TI81xx]
Signed-off-by: Tom Rini <trini@konsulko.com>

5 files changed, 39 insertions, 10 deletions

diff --git a/arch/arm/mach-omap2/am33xx/Makefile b/arch/arm/mach-omap2/am33xx/Makefile
index 1e4c04e..b2f8158 100644
--- a/arch/arm/mach-omap2/am33xx/Makefile
+++ b/arch/arm/mach-omap2/am33xx/Makefile
@@ -21,6 +21,8 @@ endif
 obj-$(CONFIG_TI816X)	+= ti816x_emif4.o
 obj-y	+= board.o
 obj-y	+= mux.o
+obj-y	+= prcm-regs.o
+obj-y	+= hw_data.o
 
 obj-$(CONFIG_CLOCK_SYNTHESIZER)	+= clk_synthesizer.o
 
diff --git a/arch/arm/mach-omap2/am33xx/board.c b/arch/arm/mach-omap2/am33xx/board.c
index faf7d07..5f1bf9c 100644
--- a/arch/arm/mach-omap2/am33xx/board.c
+++ b/arch/arm/mach-omap2/am33xx/board.c
@@ -26,6 +26,7 @@
 #include <asm/io.h>
 #include <asm/emif.h>
 #include <asm/gpio.h>
+#include <asm/omap_common.h>
 #include <i2c.h>
 #include <miiphy.h>
 #include <cpsw.h>
@@ -347,6 +348,7 @@ void early_system_init(void)
 #ifdef CONFIG_SPL_BUILD
 void board_init_f(ulong dummy)
 {
+	hw_data_init();
 	early_system_init();
 	board_early_init_f();
 	sdram_init();
@@ -361,6 +363,7 @@ void board_init_f(ulong dummy)
 
 int arch_cpu_init_dm(void)
 {
+	hw_data_init();
 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
 	early_system_init();
 #endif
diff --git a/arch/arm/mach-omap2/am33xx/hw_data.c b/arch/arm/mach-omap2/am33xx/hw_data.c
new file mode 100644
index 0000000..63e55cf
--- /dev/null
+++ b/arch/arm/mach-omap2/am33xx/hw_data.c
@@ -0,0 +1,19 @@
+/*
+ * HW data initialization for AM33xx.
+ *
+ * (C) Copyright 2017 Linaro Ltd.
+ * Sam Protsenko <semen.protsenko@linaro.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm/arch/omap.h>
+#include <asm/omap_common.h>
+
+struct omap_sys_ctrl_regs const **ctrl =
+	(struct omap_sys_ctrl_regs const **)OMAP_SRAM_SCRATCH_SYS_CTRL;
+
+void hw_data_init(void)
+{
+	*ctrl = &am33xx_ctrl;
+}
diff --git a/arch/arm/mach-omap2/am33xx/prcm-regs.c b/arch/arm/mach-omap2/am33xx/prcm-regs.c
new file mode 100644
index 0000000..c9a3af6
--- /dev/null
+++ b/arch/arm/mach-omap2/am33xx/prcm-regs.c
@@ -0,0 +1,15 @@
+/*
+ * HW regs data for AM33xx.
+ *
+ * (C) Copyright 2017 Linaro Ltd.
+ * Sam Protsenko <semen.protsenko@linaro.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm/arch/hardware.h>
+#include <asm/omap_common.h>
+
+struct omap_sys_ctrl_regs const am33xx_ctrl = {
+	.control_status = CTRL_BASE + 0x40,
+};
diff --git a/arch/arm/mach-omap2/am33xx/sys_info.c b/arch/arm/mach-omap2/am33xx/sys_info.c
index 564bae6..ea434aa 100644
--- a/arch/arm/mach-omap2/am33xx/sys_info.c
+++ b/arch/arm/mach-omap2/am33xx/sys_info.c
@@ -51,16 +51,6 @@ u32 get_cpu_type(void)
 }
 
 /**
- * get_device_type(): tell if GP/HS/EMU/TST
- */
-u32 get_device_type(void)
-{
-	int mode;
-	mode = readl(&cstat->statusreg) & (DEVICE_MASK);
-	return mode >>= 8;
-}
-
-/**
  * get_sysboot_value(void) - return SYS_BOOT[4:0]
  */
 u32 get_sysboot_value(void)