arch/arm/mach-imx/Kconfig

config IMX_HAVE_DMA_V1
	bool

config HAVE_IMX_GPC
	bool

config HAVE_IMX_MMDC
	bool

config HAVE_IMX_SRC
	bool

#
# ARCH_MX31 and ARCH_MX35 are left for compatibility
# Some usages assume that having one of them implies not having (e.g.) ARCH_MX2.
# To easily distinguish good and reviewed from unreviewed usages new (and IMHO
# more sensible) names are used: SOC_IMX31 and SOC_IMX35
config ARCH_MX1
	bool

config MACH_MX21
	bool

config ARCH_MX25
	bool

config MACH_MX27
	bool

config ARCH_MX31
	bool

config ARCH_MX35
	bool

config SOC_IMX1
	bool
	select ARCH_MX1
	select CPU_ARM920T
	select IMX_HAVE_DMA_V1
	select IMX_HAVE_IOMUX_V1
	select MXC_AVIC

config SOC_IMX21
	bool
	select MACH_MX21
	select CPU_ARM926T
	select ARCH_MXC_AUDMUX_V1
	select IMX_HAVE_DMA_V1
	select IMX_HAVE_IOMUX_V1
	select MXC_AVIC

config SOC_IMX25
	bool
	select ARCH_MX25
	select CPU_ARM926T
	select ARCH_MXC_AUDMUX_V2
	select ARCH_MXC_IOMUX_V3
	select MXC_AVIC

config SOC_IMX27
	bool
	select MACH_MX27
	select CPU_ARM926T
	select ARCH_MXC_AUDMUX_V1
	select IMX_HAVE_DMA_V1
	select IMX_HAVE_IOMUX_V1
	select MXC_AVIC

config SOC_IMX31
	bool
	select CPU_V6
	select IMX_HAVE_PLATFORM_MXC_RNGA
	select ARCH_MXC_AUDMUX_V2
	select ARCH_MX31
	select MXC_AVIC
	select SMP_ON_UP if SMP

config SOC_IMX35
	bool
	select CPU_V6
	select ARCH_MXC_IOMUX_V3
	select ARCH_MXC_AUDMUX_V2
	select HAVE_EPIT
	select ARCH_MX35
	select MXC_AVIC
	select SMP_ON_UP if SMP


if ARCH_IMX_V4_V5

comment "MX1 platforms:"
config MACH_MXLADS
	bool

config ARCH_MX1ADS
	bool "MX1ADS platform"
	select MACH_MXLADS
	select SOC_IMX1
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IMX_UART
	help
	  Say Y here if you are using Motorola MX1ADS/MXLADS boards

config MACH_SCB9328
	bool "Synertronixx scb9328"
	select IMX_HAVE_PLATFORM_IMX_UART
	help
	  Say Y here if you are using a Synertronixx scb9328 board

config MACH_APF9328
	bool "APF9328"
	select SOC_IMX1
	select IMX_HAVE_PLATFORM_IMX_UART
	help
	  Say Yes here if you are using the Armadeus APF9328 development board

comment "MX21 platforms:"

config MACH_MX21ADS
	bool "MX21ADS platform"
	select SOC_IMX21
	select IMX_HAVE_PLATFORM_IMX_FB
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_MXC_MMC
	select IMX_HAVE_PLATFORM_MXC_NAND
	help
	  Include support for MX21ADS platform. This includes specific
	  configurations for the board and its peripherals.

comment "MX25 platforms:"

config MACH_MX25_3DS
	bool "Support MX25PDK (3DS) Platform"
	select SOC_IMX25
	select IMX_HAVE_PLATFORM_FLEXCAN
	select IMX_HAVE_PLATFORM_FSL_USB2_UDC
	select IMX_HAVE_PLATFORM_IMX2_WDT
	select IMX_HAVE_PLATFORM_IMXDI_RTC
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IMX_FB
	select IMX_HAVE_PLATFORM_IMX_KEYPAD
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_MXC_EHCI
	select IMX_HAVE_PLATFORM_MXC_NAND
	select IMX_HAVE_PLATFORM_SDHCI_ESDHC_IMX

config MACH_EUKREA_CPUIMX25
	bool "Support Eukrea CPUIMX25 Platform"
	select SOC_IMX25
	select IMX_HAVE_PLATFORM_FLEXCAN
	select IMX_HAVE_PLATFORM_FSL_USB2_UDC
	select IMX_HAVE_PLATFORM_IMXDI_RTC
	select IMX_HAVE_PLATFORM_IMX_FB
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_MXC_EHCI
	select IMX_HAVE_PLATFORM_MXC_NAND
	select IMX_HAVE_PLATFORM_SDHCI_ESDHC_IMX
	select MXC_ULPI if USB_ULPI

choice
	prompt "Baseboard"
	depends on MACH_EUKREA_CPUIMX25
	default MACH_EUKREA_MBIMXSD25_BASEBOARD

config MACH_EUKREA_MBIMXSD25_BASEBOARD
	bool "Eukrea MBIMXSD development board"
	select IMX_HAVE_PLATFORM_GPIO_KEYS
	select IMX_HAVE_PLATFORM_IMX_SSI
	select LEDS_GPIO_REGISTER
	help
	  This adds board specific devices that can be found on Eukrea's
	  MBIMXSD evaluation board.

endchoice

comment "MX27 platforms:"

config MACH_MX27ADS
	bool "MX27ADS platform"
	select SOC_IMX27
	select IMX_HAVE_PLATFORM_IMX_FB
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_MXC_MMC
	select IMX_HAVE_PLATFORM_MXC_NAND
	select IMX_HAVE_PLATFORM_MXC_W1
	help
	  Include support for MX27ADS platform. This includes specific
	  configurations for the board and its peripherals.

config MACH_PCM038
	bool "Phytec phyCORE-i.MX27 CPU module (pcm038)"
	select SOC_IMX27
	select IMX_HAVE_PLATFORM_IMX2_WDT
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_MXC_EHCI
	select IMX_HAVE_PLATFORM_MXC_NAND
	select IMX_HAVE_PLATFORM_MXC_W1
	select IMX_HAVE_PLATFORM_SPI_IMX
	select MXC_ULPI if USB_ULPI
	help
	  Include support for phyCORE-i.MX27 (aka pcm038) platform. This
	  includes specific configurations for the module and its peripherals.

choice
	prompt "Baseboard"
	depends on MACH_PCM038
	default MACH_PCM970_BASEBOARD

config MACH_PCM970_BASEBOARD
	bool "PHYTEC PCM970 development board"
	select IMX_HAVE_PLATFORM_IMX_FB
	select IMX_HAVE_PLATFORM_MXC_MMC
	help
	  This adds board specific devices that can be found on Phytec's
	  PCM970 evaluation board.

endchoice

config MACH_CPUIMX27
	bool "Eukrea CPUIMX27 module"
	select SOC_IMX27
	select IMX_HAVE_PLATFORM_FSL_USB2_UDC
	select IMX_HAVE_PLATFORM_IMX2_WDT
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_MXC_EHCI
	select IMX_HAVE_PLATFORM_MXC_NAND
	select IMX_HAVE_PLATFORM_MXC_W1
	select MXC_ULPI if USB_ULPI
	help
	  Include support for Eukrea CPUIMX27 platform. This includes
	  specific configurations for the module and its peripherals.

config MACH_EUKREA_CPUIMX27_USESDHC2
	bool "CPUIMX27 integrates SDHC2 module"
	depends on MACH_CPUIMX27
	select IMX_HAVE_PLATFORM_MXC_MMC
	help
	  This adds support for the internal SDHC2 used on CPUIMX27
	  for wifi or eMMC.

config MACH_EUKREA_CPUIMX27_USEUART4
	bool "CPUIMX27 integrates UART4 module"
	depends on MACH_CPUIMX27
	help
	  This adds support for the internal UART4 used on CPUIMX27
	  for bluetooth.

choice
	prompt "Baseboard"
	depends on MACH_CPUIMX27
	default MACH_EUKREA_MBIMX27_BASEBOARD

config MACH_EUKREA_MBIMX27_BASEBOARD
	bool "Eukrea MBIMX27 development board"
	select IMX_HAVE_PLATFORM_IMX_FB
	select IMX_HAVE_PLATFORM_IMX_KEYPAD
	select IMX_HAVE_PLATFORM_IMX_SSI
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_MXC_MMC
	select IMX_HAVE_PLATFORM_SPI_IMX
	select LEDS_GPIO_REGISTER
	help
	  This adds board specific devices that can be found on Eukrea's
	  MBIMX27 evaluation board.

endchoice

config MACH_MX27_3DS
	bool "MX27PDK platform"
	select SOC_IMX27
	select IMX_HAVE_PLATFORM_FSL_USB2_UDC
	select IMX_HAVE_PLATFORM_IMX2_WDT
	select IMX_HAVE_PLATFORM_IMX_FB
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IMX_KEYPAD
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_MXC_EHCI
	select IMX_HAVE_PLATFORM_MXC_MMC
	select IMX_HAVE_PLATFORM_SPI_IMX
	select MXC_DEBUG_BOARD
	select MXC_ULPI if USB_ULPI
	help
	  Include support for MX27PDK platform. This includes specific
	  configurations for the board and its peripherals.

config MACH_IMX27_VISSTRIM_M10
	bool "Vista Silicon i.MX27 Visstrim_m10"
	select SOC_IMX27
	select IMX_HAVE_PLATFORM_GPIO_KEYS
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IMX_SSI
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_MXC_MMC
	select IMX_HAVE_PLATFORM_MXC_EHCI
	help
	  Include support for Visstrim_m10 platform and its different variants.
	  This includes specific configurations for the board and its
	  peripherals.

config MACH_IMX27LITE
	bool "LogicPD MX27 LITEKIT platform"
	select SOC_IMX27
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_IMX_SSI
	help
	  Include support for MX27 LITEKIT platform. This includes specific
	  configurations for the board and its peripherals.

config MACH_PCA100
	bool "Phytec phyCARD-s (pca100)"
	select SOC_IMX27
	select IMX_HAVE_PLATFORM_FSL_USB2_UDC
	select IMX_HAVE_PLATFORM_IMX2_WDT
	select IMX_HAVE_PLATFORM_IMX_FB
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IMX_SSI
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_MXC_EHCI
	select IMX_HAVE_PLATFORM_MXC_MMC
	select IMX_HAVE_PLATFORM_MXC_NAND
	select IMX_HAVE_PLATFORM_MXC_W1
	select IMX_HAVE_PLATFORM_SPI_IMX
	select MXC_ULPI if USB_ULPI
	help
	  Include support for phyCARD-s (aka pca100) platform. This
	  includes specific configurations for the module and its peripherals.

config MACH_MXT_TD60
	bool "Maxtrack i-MXT TD60"
	select SOC_IMX27
	select IMX_HAVE_PLATFORM_IMX_FB
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_MXC_MMC
	select IMX_HAVE_PLATFORM_MXC_NAND
	help
	  Include support for i-MXT (aka td60) platform. This
	  includes specific configurations for the module and its peripherals.

config MACH_IMX27IPCAM
	bool "IMX27 IPCAM platform"
	select SOC_IMX27
	select IMX_HAVE_PLATFORM_IMX2_WDT
	select IMX_HAVE_PLATFORM_IMX_UART
	help
	  Include support for IMX27 IPCAM platform. This includes specific
	  configurations for the board and its peripherals.

endif

if ARCH_IMX_V6_V7

comment "MX31 platforms:"

config MACH_MX31ADS
	bool "Support MX31ADS platforms"
	select SOC_IMX31
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IMX_SSI
	select IMX_HAVE_PLATFORM_IMX_UART
	default y
	help
	  Include support for MX31ADS platform. This includes specific
	  configurations for the board and its peripherals.

config MACH_MX31ADS_WM1133_EV1
	bool "Support Wolfson Microelectronics 1133-EV1 module"
	depends on MACH_MX31ADS
	depends on MFD_WM8350_I2C
	depends on REGULATOR_WM8350
	select MFD_WM8350_CONFIG_MODE_0
	select MFD_WM8352_CONFIG_MODE_0
	help
	  Include support for the Wolfson Microelectronics 1133-EV1 PMU
	  and audio module for the MX31ADS platform.

config MACH_MX31LILLY
	bool "Support MX31 LILLY-1131 platforms (INCO startec)"
	select SOC_IMX31
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_IPU_CORE
	select IMX_HAVE_PLATFORM_MXC_EHCI
	select IMX_HAVE_PLATFORM_MXC_MMC
	select IMX_HAVE_PLATFORM_SPI_IMX
	select MXC_ULPI if USB_ULPI
	help
	  Include support for mx31 based LILLY1131 modules. This includes
	  specific configurations for the board and its peripherals.

config MACH_MX31LITE
	bool "Support MX31 LITEKIT (LogicPD)"
	select SOC_IMX31
	select MXC_ULPI if USB_ULPI
	select IMX_HAVE_PLATFORM_IMX2_WDT
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_MXC_EHCI
	select IMX_HAVE_PLATFORM_MXC_MMC
	select IMX_HAVE_PLATFORM_MXC_NAND
	select IMX_HAVE_PLATFORM_MXC_RTC
	select IMX_HAVE_PLATFORM_SPI_IMX
	select LEDS_GPIO_REGISTER
	help
	  Include support for MX31 LITEKIT platform. This includes specific
	  configurations for the board and its peripherals.

config MACH_PCM037
	bool "Support Phytec pcm037 (i.MX31) platforms"
	select SOC_IMX31
	select IMX_HAVE_PLATFORM_FSL_USB2_UDC
	select IMX_HAVE_PLATFORM_IMX2_WDT
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_IPU_CORE
	select IMX_HAVE_PLATFORM_MXC_EHCI
	select IMX_HAVE_PLATFORM_MXC_MMC
	select IMX_HAVE_PLATFORM_MXC_NAND
	select IMX_HAVE_PLATFORM_MXC_W1
	select MXC_ULPI if USB_ULPI
	help
	  Include support for Phytec pcm037 platform. This includes
	  specific configurations for the board and its peripherals.

config MACH_PCM037_EET
	bool "Support pcm037 EET board extensions"
	depends on MACH_PCM037
	select IMX_HAVE_PLATFORM_GPIO_KEYS
	select IMX_HAVE_PLATFORM_SPI_IMX
	help
	  Add support for PCM037 EET baseboard extensions. If you are using the
	  OLED display with EET, use "video=mx3fb:CMEL-OLED" kernel
	  command-line parameter.

config MACH_MX31_3DS
	bool "Support MX31PDK (3DS)"
	select SOC_IMX31
	select MXC_DEBUG_BOARD
	select IMX_HAVE_PLATFORM_FSL_USB2_UDC
	select IMX_HAVE_PLATFORM_IMX2_WDT
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IMX_KEYPAD
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_IPU_CORE
	select IMX_HAVE_PLATFORM_MXC_EHCI
	select IMX_HAVE_PLATFORM_MXC_NAND
	select IMX_HAVE_PLATFORM_SPI_IMX
	select MXC_ULPI if USB_ULPI
	help
	  Include support for MX31PDK (3DS) platform. This includes specific
	  configurations for the board and its peripherals.

config MACH_MX31_3DS_MXC_NAND_USE_BBT
	bool "Make the MXC NAND driver use the in flash Bad Block Table"
	depends on MACH_MX31_3DS
	depends on MTD_NAND_MXC
	help
	  Enable this if you want that the MXC NAND driver uses the in flash
	  Bad Block Table to know what blocks are bad instead of scanning the
	  entire flash looking for bad block markers.

config MACH_MX31MOBOARD
	bool "Support mx31moboard platforms (EPFL Mobots group)"
	select SOC_IMX31
	select IMX_HAVE_PLATFORM_FSL_USB2_UDC
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_IPU_CORE
	select IMX_HAVE_PLATFORM_MXC_EHCI
	select IMX_HAVE_PLATFORM_MXC_MMC
	select IMX_HAVE_PLATFORM_SPI_IMX
	select LEDS_GPIO_REGISTER
	select MXC_ULPI if USB_ULPI
	help
	  Include support for mx31moboard platform. This includes specific
	  configurations for the board and its peripherals.

config MACH_QONG
	bool "Support Dave/DENX QongEVB-LITE platform"
	select SOC_IMX31
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_IMX2_WDT
	help
	  Include support for Dave/DENX QongEVB-LITE platform. This includes
	  specific configurations for the board and its peripherals.

config MACH_ARMADILLO5X0
	bool "Support Atmark Armadillo-500 Development Base Board"
	select SOC_IMX31
	select IMX_HAVE_PLATFORM_GPIO_KEYS
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_IPU_CORE
	select IMX_HAVE_PLATFORM_MXC_EHCI
	select IMX_HAVE_PLATFORM_MXC_MMC
	select IMX_HAVE_PLATFORM_MXC_NAND
	select MXC_ULPI if USB_ULPI
	help
	  Include support for Atmark Armadillo-500 platform. This includes
	  specific configurations for the board and its peripherals.

config MACH_KZM_ARM11_01
	bool "Support KZM-ARM11-01(Kyoto Microcomputer)"
	select SOC_IMX31
	select IMX_HAVE_PLATFORM_IMX_UART
	help
	  Include support for KZM-ARM11-01. This includes specific
	  configurations for the board and its peripherals.

config MACH_BUG
	bool "Support Buglabs BUGBase platform"
	select SOC_IMX31
	select IMX_HAVE_PLATFORM_IMX_UART
	default y
	help
	  Include support for BUGBase 1.3 platform. This includes specific
	  configurations for the board and its peripherals.

comment "MX35 platforms:"

config MACH_PCM043
	bool "Support Phytec pcm043 (i.MX35) platforms"
	select SOC_IMX35
	select IMX_HAVE_PLATFORM_FLEXCAN
	select IMX_HAVE_PLATFORM_FSL_USB2_UDC
	select IMX_HAVE_PLATFORM_IMX2_WDT
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IMX_SSI
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_IPU_CORE
	select IMX_HAVE_PLATFORM_MXC_EHCI
	select IMX_HAVE_PLATFORM_MXC_NAND
	select IMX_HAVE_PLATFORM_SDHCI_ESDHC_IMX
	select MXC_ULPI if USB_ULPI
	help
	  Include support for Phytec pcm043 platform. This includes
	  specific configurations for the board and its peripherals.

config MACH_MX35_3DS
	bool "Support MX35PDK platform"
	select SOC_IMX35
	select MXC_DEBUG_BOARD
	select IMX_HAVE_PLATFORM_FSL_USB2_UDC
	select IMX_HAVE_PLATFORM_IMX2_WDT
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_MXC_EHCI
	select IMX_HAVE_PLATFORM_MXC_NAND
	select IMX_HAVE_PLATFORM_SDHCI_ESDHC_IMX
	help
	  Include support for MX35PDK platform. This includes specific
	  configurations for the board and its peripherals.

config MACH_EUKREA_CPUIMX35
	bool "Support Eukrea CPUIMX35 Platform"
	select SOC_IMX35
	select IMX_HAVE_PLATFORM_FLEXCAN
	select IMX_HAVE_PLATFORM_FSL_USB2_UDC
	select IMX_HAVE_PLATFORM_IMX2_WDT
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_MXC_EHCI
	select IMX_HAVE_PLATFORM_MXC_NAND
	select IMX_HAVE_PLATFORM_SDHCI_ESDHC_IMX
	select MXC_ULPI if USB_ULPI
	help
	  Include support for Eukrea CPUIMX35 platform. This includes
	  specific configurations for the board and its peripherals.

choice
	prompt "Baseboard"
	depends on MACH_EUKREA_CPUIMX35
	default MACH_EUKREA_MBIMXSD35_BASEBOARD

config MACH_EUKREA_MBIMXSD35_BASEBOARD
	bool "Eukrea MBIMXSD development board"
	select IMX_HAVE_PLATFORM_GPIO_KEYS
	select IMX_HAVE_PLATFORM_IMX_SSI
	select IMX_HAVE_PLATFORM_IPU_CORE
	select LEDS_GPIO_REGISTER
	help
	  This adds board specific devices that can be found on Eukrea's
	  MBIMXSD evaluation board.

endchoice

config MACH_VPR200
	bool "Support VPR200 platform"
	select SOC_IMX35
	select IMX_HAVE_PLATFORM_FSL_USB2_UDC
	select IMX_HAVE_PLATFORM_GPIO_KEYS
	select IMX_HAVE_PLATFORM_IMX2_WDT
	select IMX_HAVE_PLATFORM_IMX_UART
	select IMX_HAVE_PLATFORM_IMX_I2C
	select IMX_HAVE_PLATFORM_IPU_CORE
	select IMX_HAVE_PLATFORM_MXC_EHCI
	select IMX_HAVE_PLATFORM_MXC_NAND
	select IMX_HAVE_PLATFORM_SDHCI_ESDHC_IMX
	help
	  Include support for VPR200 platform. This includes specific
	  configurations for the board and its peripherals.

comment "i.MX6 family:"

config SOC_IMX6Q
	bool "i.MX6 Quad support"
	select ARM_GIC
	select CACHE_L2X0
	select CPU_V7
	select HAVE_ARM_SCU
	select HAVE_IMX_GPC
	select HAVE_IMX_MMDC
	select HAVE_IMX_SRC
	select USE_OF

	help
	  This enables support for Freescale i.MX6 Quad processor.

endif