b2e6355559
This converts the GPIO-based I2C-driver to using GPIO descriptors instead of the old global numberspace-based GPIO interface. We: - Convert the driver to unconditionally grab two GPIOs from the device by index 0 (SDA) and 1 (SCL) which will work fine with device tree and descriptor tables. The existing device trees will continue to work just like before, but without any roundtrip through the global numberspace. - Brutally convert all boardfiles still passing global GPIOs by registering descriptor tables associated with the devices instead so this driver does not need to keep supporting passing any GPIO numbers as platform data. There is no stepwise approach as elegant as this, I strongly prefer this big hammer over any antsteps for this conversion. This way the old GPIO numbers go away and NEVER COME BACK. Special conversion for the different boards utilizing I2C-GPIO: - EP93xx (arch/arm/mach-ep93xx): pretty straight forward as all boards were using the same two GPIO lines, just define these two in a lookup table for "i2c-gpio" and register these along with the device. None of them define any other platform data so just pass NULL as platform data. This platform selects GPIOLIB so all should be smooth. The pins appear on a gpiochip for bank "G" as pins 1 (SDA) and 0 (SCL). - IXP4 (arch/arm/mach-ixp4): descriptor tables have to be registered for each board separately. They all use "IXP4XX_GPIO_CHIP" so it is pretty straight forward. Most board define no other platform data than SCL/SDA so they can drop the #include of <linux/i2c-gpio.h> and assign NULL to platform data. The "goramo_mlr" (Goramo Multilink Router) board is a bit worrisome: it implements its own I2C bit-banging in the board file, and optionally registers an I2C serial port, but claims the same GPIO lines for itself in the board file. This is not going to work: there will be competition for the GPIO lines, so delete the optional extra I2C bus instead, no I2C devices are registered on it anyway, there are just hints that it may contain an EEPROM that may be accessed from userspace. This needs to be fixed up properly by the serial clock using I2C emulation so drop a note in the code. - KS8695 board acs5k (arch/arm/mach-ks8695/board-acs5.c) has some platform data in addition to the pins so it needs to be kept around sans GPIO lines. Its GPIO chip is named "KS8695" and the arch selects GPIOLIB. - PXA boards (arch/arm/mach-pxa/*) use some of the platform data so it needs to be preserved here. The viper board even registers two GPIO I2Cs. The gpiochip is named "gpio-pxa" and the arch selects GPIOLIB. - SA1100 Simpad (arch/arm/mach-sa1100/simpad.c) defines a GPIO I2C bus, and the arch selects GPIOLIB. - Blackfin boards (arch/blackfin/bf533 etc) for these I assume their I2C GPIOs refer to the local gpiochip defined in arch/blackfin/kernel/bfin_gpio.c names "BFIN-GPIO". The arch selects GPIOLIB. The boards get spiked with IF_ENABLED(I2C_GPIO) but that is a side effect of it being like that already (I would just have Kconfig select I2C_GPIO and get rid of them all.) I also delete any platform data set to 0 as it will get that value anyway from static declartions of platform data. - The MIPS selects GPIOLIB and the Alchemy machine is using two local GPIO chips, one of them has a GPIO I2C. We need to adjust the local offset from the global number space here. The ATH79 has a proper GPIO driver in drivers/gpio/gpio-ath79.c and AFAICT the chip is named "ath79-gpio" and the PB44 PCF857x expander spawns from this on GPIO 1 and 0. The latter board only use the platform data to specify pins so it can be cut altogether after this. - The MFD Silicon Motion SM501 is a special case. It dynamically spawns an I2C bus off the MFD using sm501_create_subdev(). We use an approach to dynamically create a machine descriptor table and attach this to the "SM501-LOW" or "SM501-HIGH" gpiochip. We use chip-local offsets to grab the right lines. We can get rid of two local static inline helpers as part of this refactoring. Cc: Steven Miao <realmz6@gmail.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Magnus Damm <magnus.damm@gmail.com> Cc: Ben Dooks <ben.dooks@codethink.co.uk> Cc: Heiko Schocher <hs@denx.de> Acked-by: Wu, Aaron <Aaron.Wu@analog.com> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Lee Jones <lee.jones@linaro.org> Acked-by: Ralf Baechle <ralf@linux-mips.org> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
689 lines
14 KiB
C
689 lines
14 KiB
C
/*
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* Copyright 2004-2009 Analog Devices Inc.
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* 2005 National ICT Australia (NICTA)
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* Aidan Williams <aidan@nicta.com.au>
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*
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* Licensed under the GPL-2 or later.
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*/
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/partitions.h>
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#include <linux/mtd/physmap.h>
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#include <linux/spi/spi.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include <linux/gpio.h>
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#include <linux/delay.h>
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#include <linux/gpio/machine.h>
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#include <asm/dma.h>
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#include <asm/bfin5xx_spi.h>
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#include <asm/portmux.h>
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#include <asm/dpmc.h>
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/*
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* Name the Board for the /proc/cpuinfo
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*/
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const char bfin_board_name[] = "ADI BF561-EZKIT";
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#if IS_ENABLED(CONFIG_USB_ISP1760_HCD)
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#include <linux/usb/isp1760.h>
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static struct resource bfin_isp1760_resources[] = {
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[0] = {
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.start = 0x2C0F0000,
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.end = 0x203C0000 + 0xfffff,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = IRQ_PF10,
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.end = IRQ_PF10,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct isp1760_platform_data isp1760_priv = {
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.is_isp1761 = 0,
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.bus_width_16 = 1,
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.port1_otg = 0,
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.analog_oc = 0,
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.dack_polarity_high = 0,
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.dreq_polarity_high = 0,
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};
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static struct platform_device bfin_isp1760_device = {
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.name = "isp1760",
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.id = 0,
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.dev = {
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.platform_data = &isp1760_priv,
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},
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.num_resources = ARRAY_SIZE(bfin_isp1760_resources),
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.resource = bfin_isp1760_resources,
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};
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#endif
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#if IS_ENABLED(CONFIG_USB_ISP1362_HCD)
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#include <linux/usb/isp1362.h>
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static struct resource isp1362_hcd_resources[] = {
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{
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.start = 0x2c060000,
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.end = 0x2c060000,
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.flags = IORESOURCE_MEM,
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}, {
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.start = 0x2c060004,
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.end = 0x2c060004,
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.flags = IORESOURCE_MEM,
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}, {
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.start = IRQ_PF8,
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.end = IRQ_PF8,
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.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWEDGE,
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},
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};
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static struct isp1362_platform_data isp1362_priv = {
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.sel15Kres = 1,
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.clknotstop = 0,
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.oc_enable = 0,
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.int_act_high = 0,
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.int_edge_triggered = 0,
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.remote_wakeup_connected = 0,
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.no_power_switching = 1,
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.power_switching_mode = 0,
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};
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static struct platform_device isp1362_hcd_device = {
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.name = "isp1362-hcd",
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.id = 0,
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.dev = {
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.platform_data = &isp1362_priv,
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},
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.num_resources = ARRAY_SIZE(isp1362_hcd_resources),
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.resource = isp1362_hcd_resources,
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};
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#endif
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#if IS_ENABLED(CONFIG_USB_NET2272)
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static struct resource net2272_bfin_resources[] = {
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{
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.start = 0x2C000000,
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.end = 0x2C000000 + 0x7F,
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.flags = IORESOURCE_MEM,
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}, {
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.start = 1,
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.flags = IORESOURCE_BUS,
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}, {
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.start = IRQ_PF10,
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.end = IRQ_PF10,
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.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
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},
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};
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static struct platform_device net2272_bfin_device = {
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.name = "net2272",
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.id = -1,
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.num_resources = ARRAY_SIZE(net2272_bfin_resources),
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.resource = net2272_bfin_resources,
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};
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#endif
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/*
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* USB-LAN EzExtender board
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* Driver needs to know address, irq and flag pin.
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*/
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#if IS_ENABLED(CONFIG_SMC91X)
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#include <linux/smc91x.h>
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static struct smc91x_platdata smc91x_info = {
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.flags = SMC91X_USE_8BIT | SMC91X_USE_16BIT | SMC91X_USE_32BIT |
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SMC91X_NOWAIT,
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.leda = RPC_LED_100_10,
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.ledb = RPC_LED_TX_RX,
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};
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static struct resource smc91x_resources[] = {
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{
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.name = "smc91x-regs",
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.start = 0x2C010300,
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.end = 0x2C010300 + 16,
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.flags = IORESOURCE_MEM,
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}, {
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.start = IRQ_PF9,
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.end = IRQ_PF9,
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.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHLEVEL,
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},
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};
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static struct platform_device smc91x_device = {
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.name = "smc91x",
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.id = 0,
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.num_resources = ARRAY_SIZE(smc91x_resources),
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.resource = smc91x_resources,
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.dev = {
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.platform_data = &smc91x_info,
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},
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};
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#endif
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#if IS_ENABLED(CONFIG_SERIAL_BFIN)
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#ifdef CONFIG_SERIAL_BFIN_UART0
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static struct resource bfin_uart0_resources[] = {
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{
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.start = BFIN_UART_THR,
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.end = BFIN_UART_GCTL+2,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = IRQ_UART_TX,
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.end = IRQ_UART_TX,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = IRQ_UART_RX,
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.end = IRQ_UART_RX,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = IRQ_UART_ERROR,
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.end = IRQ_UART_ERROR,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = CH_UART_TX,
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.end = CH_UART_TX,
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.flags = IORESOURCE_DMA,
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},
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{
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.start = CH_UART_RX,
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.end = CH_UART_RX,
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.flags = IORESOURCE_DMA,
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},
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};
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static unsigned short bfin_uart0_peripherals[] = {
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P_UART0_TX, P_UART0_RX, 0
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};
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static struct platform_device bfin_uart0_device = {
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.name = "bfin-uart",
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.id = 0,
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.num_resources = ARRAY_SIZE(bfin_uart0_resources),
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.resource = bfin_uart0_resources,
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.dev = {
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.platform_data = &bfin_uart0_peripherals, /* Passed to driver */
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},
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};
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#endif
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#endif
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#if IS_ENABLED(CONFIG_BFIN_SIR)
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#ifdef CONFIG_BFIN_SIR0
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static struct resource bfin_sir0_resources[] = {
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{
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.start = 0xFFC00400,
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.end = 0xFFC004FF,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = IRQ_UART0_RX,
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.end = IRQ_UART0_RX+1,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = CH_UART0_RX,
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.end = CH_UART0_RX+1,
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.flags = IORESOURCE_DMA,
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},
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};
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static struct platform_device bfin_sir0_device = {
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.name = "bfin_sir",
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.id = 0,
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.num_resources = ARRAY_SIZE(bfin_sir0_resources),
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.resource = bfin_sir0_resources,
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};
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#endif
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#endif
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#if IS_ENABLED(CONFIG_MTD_PHYSMAP)
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static struct mtd_partition ezkit_partitions[] = {
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{
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.name = "bootloader(nor)",
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.size = 0x40000,
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.offset = 0,
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}, {
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.name = "linux kernel(nor)",
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.size = 0x1C0000,
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.offset = MTDPART_OFS_APPEND,
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}, {
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.name = "file system(nor)",
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.size = 0x800000 - 0x40000 - 0x1C0000 - 0x2000 * 8,
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.offset = MTDPART_OFS_APPEND,
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}, {
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.name = "config(nor)",
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.size = 0x2000 * 7,
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.offset = MTDPART_OFS_APPEND,
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}, {
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.name = "u-boot env(nor)",
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.size = 0x2000,
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.offset = MTDPART_OFS_APPEND,
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}
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};
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static struct physmap_flash_data ezkit_flash_data = {
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.width = 2,
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.parts = ezkit_partitions,
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.nr_parts = ARRAY_SIZE(ezkit_partitions),
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};
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static struct resource ezkit_flash_resource = {
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.start = 0x20000000,
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.end = 0x207fffff,
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device ezkit_flash_device = {
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.name = "physmap-flash",
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.id = 0,
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.dev = {
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.platform_data = &ezkit_flash_data,
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},
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.num_resources = 1,
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.resource = &ezkit_flash_resource,
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};
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#endif
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#if IS_ENABLED(CONFIG_SPI_BFIN5XX)
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/* SPI (0) */
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static struct resource bfin_spi0_resource[] = {
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[0] = {
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.start = SPI0_REGBASE,
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.end = SPI0_REGBASE + 0xFF,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = CH_SPI,
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.end = CH_SPI,
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.flags = IORESOURCE_DMA,
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},
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[2] = {
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.start = IRQ_SPI,
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.end = IRQ_SPI,
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.flags = IORESOURCE_IRQ,
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}
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};
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/* SPI controller data */
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static struct bfin5xx_spi_master bfin_spi0_info = {
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.num_chipselect = 8,
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.enable_dma = 1, /* master has the ability to do dma transfer */
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.pin_req = {P_SPI0_SCK, P_SPI0_MISO, P_SPI0_MOSI, 0},
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};
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static struct platform_device bfin_spi0_device = {
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.name = "bfin-spi",
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.id = 0, /* Bus number */
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.num_resources = ARRAY_SIZE(bfin_spi0_resource),
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.resource = bfin_spi0_resource,
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.dev = {
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.platform_data = &bfin_spi0_info, /* Passed to driver */
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},
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};
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#endif
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static struct spi_board_info bfin_spi_board_info[] __initdata = {
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#if IS_ENABLED(CONFIG_SND_BF5XX_SOC_AD183X)
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{
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.modalias = "ad183x",
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.max_speed_hz = 3125000, /* max spi clock (SCK) speed in HZ */
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.bus_num = 0,
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.chip_select = 4,
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.platform_data = "ad1836", /* only includes chip name for the moment */
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.mode = SPI_MODE_3,
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},
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#endif
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#if IS_ENABLED(CONFIG_SPI_SPIDEV)
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{
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.modalias = "spidev",
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.max_speed_hz = 3125000, /* max spi clock (SCK) speed in HZ */
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.bus_num = 0,
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.chip_select = 1,
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},
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#endif
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};
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#if IS_ENABLED(CONFIG_KEYBOARD_GPIO)
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#include <linux/input.h>
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#include <linux/gpio_keys.h>
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static struct gpio_keys_button bfin_gpio_keys_table[] = {
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{BTN_0, GPIO_PF5, 1, "gpio-keys: BTN0"},
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{BTN_1, GPIO_PF6, 1, "gpio-keys: BTN1"},
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{BTN_2, GPIO_PF7, 1, "gpio-keys: BTN2"},
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{BTN_3, GPIO_PF8, 1, "gpio-keys: BTN3"},
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};
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static struct gpio_keys_platform_data bfin_gpio_keys_data = {
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.buttons = bfin_gpio_keys_table,
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.nbuttons = ARRAY_SIZE(bfin_gpio_keys_table),
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};
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static struct platform_device bfin_device_gpiokeys = {
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.name = "gpio-keys",
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.dev = {
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.platform_data = &bfin_gpio_keys_data,
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},
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};
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#endif
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#if IS_ENABLED(CONFIG_I2C_GPIO)
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#include <linux/i2c-gpio.h>
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static struct gpiod_lookup_table bfin_i2c_gpiod_table = {
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.dev_id = "i2c-gpio",
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.table = {
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GPIO_LOOKUP_IDX("BFIN-GPIO", GPIO_PF1, NULL, 0,
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GPIO_ACTIVE_HIGH),
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GPIO_LOOKUP_IDX("BFIN-GPIO", GPIO_PF0, NULL, 1,
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GPIO_ACTIVE_HIGH),
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},
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};
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static struct i2c_gpio_platform_data i2c_gpio_data = {
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.udelay = 10,
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};
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static struct platform_device i2c_gpio_device = {
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.name = "i2c-gpio",
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.id = 0,
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.dev = {
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.platform_data = &i2c_gpio_data,
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},
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};
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#endif
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static const unsigned int cclk_vlev_datasheet[] =
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{
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VRPAIR(VLEV_085, 250000000),
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VRPAIR(VLEV_090, 300000000),
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VRPAIR(VLEV_095, 313000000),
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VRPAIR(VLEV_100, 350000000),
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VRPAIR(VLEV_105, 400000000),
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VRPAIR(VLEV_110, 444000000),
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VRPAIR(VLEV_115, 450000000),
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VRPAIR(VLEV_120, 475000000),
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VRPAIR(VLEV_125, 500000000),
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VRPAIR(VLEV_130, 600000000),
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};
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static struct bfin_dpmc_platform_data bfin_dmpc_vreg_data = {
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.tuple_tab = cclk_vlev_datasheet,
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.tabsize = ARRAY_SIZE(cclk_vlev_datasheet),
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.vr_settling_time = 25 /* us */,
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};
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static struct platform_device bfin_dpmc = {
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.name = "bfin dpmc",
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.dev = {
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.platform_data = &bfin_dmpc_vreg_data,
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},
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};
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#if IS_ENABLED(CONFIG_VIDEO_BLACKFIN_CAPTURE)
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#include <linux/videodev2.h>
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#include <media/blackfin/bfin_capture.h>
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#include <media/blackfin/ppi.h>
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static const unsigned short ppi_req[] = {
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P_PPI0_D0, P_PPI0_D1, P_PPI0_D2, P_PPI0_D3,
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P_PPI0_D4, P_PPI0_D5, P_PPI0_D6, P_PPI0_D7,
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P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
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0,
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};
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static const struct ppi_info ppi_info = {
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.type = PPI_TYPE_PPI,
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.dma_ch = CH_PPI0,
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.irq_err = IRQ_PPI1_ERROR,
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.base = (void __iomem *)PPI0_CONTROL,
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.pin_req = ppi_req,
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};
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#if IS_ENABLED(CONFIG_VIDEO_ADV7183)
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#include <media/i2c/adv7183.h>
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static struct v4l2_input adv7183_inputs[] = {
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{
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.index = 0,
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.name = "Composite",
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.type = V4L2_INPUT_TYPE_CAMERA,
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.std = V4L2_STD_ALL,
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.capabilities = V4L2_IN_CAP_STD,
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},
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{
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.index = 1,
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.name = "S-Video",
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.type = V4L2_INPUT_TYPE_CAMERA,
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.std = V4L2_STD_ALL,
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.capabilities = V4L2_IN_CAP_STD,
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},
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{
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.index = 2,
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.name = "Component",
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.type = V4L2_INPUT_TYPE_CAMERA,
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.std = V4L2_STD_ALL,
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.capabilities = V4L2_IN_CAP_STD,
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},
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};
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static struct bcap_route adv7183_routes[] = {
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{
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.input = ADV7183_COMPOSITE4,
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.output = ADV7183_8BIT_OUT,
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},
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{
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.input = ADV7183_SVIDEO0,
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.output = ADV7183_8BIT_OUT,
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},
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{
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.input = ADV7183_COMPONENT0,
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.output = ADV7183_8BIT_OUT,
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},
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};
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static const unsigned adv7183_gpio[] = {
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GPIO_PF13, /* reset pin */
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GPIO_PF2, /* output enable pin */
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};
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static struct bfin_capture_config bfin_capture_data = {
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.card_name = "BF561",
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.inputs = adv7183_inputs,
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.num_inputs = ARRAY_SIZE(adv7183_inputs),
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.routes = adv7183_routes,
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.i2c_adapter_id = 0,
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.board_info = {
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.type = "adv7183",
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.addr = 0x20,
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.platform_data = (void *)adv7183_gpio,
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},
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.ppi_info = &ppi_info,
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.ppi_control = (PACK_EN | DLEN_8 | DMA32 | FLD_SEL),
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};
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#endif
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static struct platform_device bfin_capture_device = {
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.name = "bfin_capture",
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.dev = {
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.platform_data = &bfin_capture_data,
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},
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};
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#endif
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#if IS_ENABLED(CONFIG_SND_BF5XX_I2S)
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static struct platform_device bfin_i2s = {
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.name = "bfin-i2s",
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.id = CONFIG_SND_BF5XX_SPORT_NUM,
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/* TODO: add platform data here */
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};
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#endif
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#if IS_ENABLED(CONFIG_SND_BF5XX_AC97)
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static struct platform_device bfin_ac97 = {
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.name = "bfin-ac97",
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.id = CONFIG_SND_BF5XX_SPORT_NUM,
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/* TODO: add platform data here */
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};
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#endif
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#if IS_ENABLED(CONFIG_SND_BF5XX_SOC_AD1836)
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static const char * const ad1836_link[] = {
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"bfin-i2s.0",
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"spi0.4",
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};
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static struct platform_device bfin_ad1836_machine = {
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.name = "bfin-snd-ad1836",
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.id = -1,
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.dev = {
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.platform_data = (void *)ad1836_link,
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},
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};
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#endif
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static struct platform_device *ezkit_devices[] __initdata = {
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&bfin_dpmc,
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#if IS_ENABLED(CONFIG_SMC91X)
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&smc91x_device,
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#endif
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#if IS_ENABLED(CONFIG_USB_NET2272)
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&net2272_bfin_device,
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#endif
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#if IS_ENABLED(CONFIG_USB_ISP1760_HCD)
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&bfin_isp1760_device,
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#endif
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#if IS_ENABLED(CONFIG_SPI_BFIN5XX)
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&bfin_spi0_device,
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#endif
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#if IS_ENABLED(CONFIG_SERIAL_BFIN)
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#ifdef CONFIG_SERIAL_BFIN_UART0
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&bfin_uart0_device,
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#endif
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#endif
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#if IS_ENABLED(CONFIG_BFIN_SIR)
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#ifdef CONFIG_BFIN_SIR0
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&bfin_sir0_device,
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#endif
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#endif
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#if IS_ENABLED(CONFIG_KEYBOARD_GPIO)
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&bfin_device_gpiokeys,
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#endif
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#if IS_ENABLED(CONFIG_I2C_GPIO)
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&i2c_gpio_device,
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#endif
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#if IS_ENABLED(CONFIG_USB_ISP1362_HCD)
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&isp1362_hcd_device,
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#endif
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#if IS_ENABLED(CONFIG_MTD_PHYSMAP)
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&ezkit_flash_device,
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#endif
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#if IS_ENABLED(CONFIG_VIDEO_BLACKFIN_CAPTURE)
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&bfin_capture_device,
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#endif
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#if IS_ENABLED(CONFIG_SND_BF5XX_I2S)
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&bfin_i2s,
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#endif
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#if IS_ENABLED(CONFIG_SND_BF5XX_AC97)
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&bfin_ac97,
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#endif
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#if IS_ENABLED(CONFIG_SND_BF5XX_SOC_AD1836)
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&bfin_ad1836_machine,
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#endif
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};
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static int __init net2272_init(void)
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{
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#if IS_ENABLED(CONFIG_USB_NET2272)
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int ret;
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ret = gpio_request(GPIO_PF11, "net2272");
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if (ret)
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return ret;
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/* Reset the USB chip */
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gpio_direction_output(GPIO_PF11, 0);
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mdelay(2);
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gpio_set_value(GPIO_PF11, 1);
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#endif
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return 0;
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}
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static int __init ezkit_init(void)
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{
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int ret;
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printk(KERN_INFO "%s(): registering device resources\n", __func__);
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#if IS_ENABLED(CONFIG_I2C_GPIO)
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gpiod_add_lookup_table(&bfin_i2c_gpiod_table);
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#endif
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ret = platform_add_devices(ezkit_devices, ARRAY_SIZE(ezkit_devices));
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if (ret < 0)
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return ret;
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#if IS_ENABLED(CONFIG_SMC91X)
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bfin_write_FIO0_DIR(bfin_read_FIO0_DIR() | (1 << 12));
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SSYNC();
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#endif
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#if IS_ENABLED(CONFIG_SND_BF5XX_SOC_AD183X)
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bfin_write_FIO0_DIR(bfin_read_FIO0_DIR() | (1 << 15));
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bfin_write_FIO0_FLAG_S(1 << 15);
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SSYNC();
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/*
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* This initialization lasts for approximately 4500 MCLKs.
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* MCLK = 12.288MHz
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*/
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udelay(400);
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#endif
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if (net2272_init())
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pr_warning("unable to configure net2272; it probably won't work\n");
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spi_register_board_info(bfin_spi_board_info, ARRAY_SIZE(bfin_spi_board_info));
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return 0;
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}
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arch_initcall(ezkit_init);
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static struct platform_device *ezkit_early_devices[] __initdata = {
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#if defined(CONFIG_SERIAL_BFIN_CONSOLE) || defined(CONFIG_EARLY_PRINTK)
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#ifdef CONFIG_SERIAL_BFIN_UART0
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&bfin_uart0_device,
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#endif
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#endif
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};
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void __init native_machine_early_platform_add_devices(void)
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{
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printk(KERN_INFO "register early platform devices\n");
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early_platform_add_devices(ezkit_early_devices,
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ARRAY_SIZE(ezkit_early_devices));
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}
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