Add support for the i2c controller found on all Allwinner sunxi SoCs, this is the same controller as found on the Marvell orion5x and kirkwood SoC families, with a slightly different register layout, so this patch uses the existing mvtwsi code.
Signed-off-by: Hans de Goede hdegoede@redhat.com Acked-by: Ian Campbell ijc@hellion.org.uk --- arch/arm/cpu/armv7/sunxi/board.c | 6 ++++++ arch/arm/cpu/armv7/sunxi/u-boot-spl.lds | 5 +++++ arch/arm/include/asm/arch-sunxi/i2c.h | 15 +++++++++++++++ board/sunxi/board.c | 7 +++++++ drivers/i2c/mvtwsi.c | 18 ++++++++++++++++++ include/configs/sunxi-common.h | 8 ++++++++ 6 files changed, 59 insertions(+) create mode 100644 arch/arm/include/asm/arch-sunxi/i2c.h
diff --git a/arch/arm/cpu/armv7/sunxi/board.c b/arch/arm/cpu/armv7/sunxi/board.c index 1e506b5..024c8c1 100644 --- a/arch/arm/cpu/armv7/sunxi/board.c +++ b/arch/arm/cpu/armv7/sunxi/board.c @@ -11,6 +11,7 @@ */
#include <common.h> +#include <i2c.h> #include <netdev.h> #include <miiphy.h> #include <serial.h> @@ -91,11 +92,16 @@ void s_init(void) clock_init(); timer_init(); gpio_init(); + i2c_init_board();
#ifdef CONFIG_SPL_BUILD gd = &gdata; preloader_console_init();
+#ifdef CONFIG_SPL_I2C_SUPPORT + /* Needed early by sunxi_board_init if PMU is enabled */ + i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); +#endif sunxi_board_init(); #endif } diff --git a/arch/arm/cpu/armv7/sunxi/u-boot-spl.lds b/arch/arm/cpu/armv7/sunxi/u-boot-spl.lds index c1ae227..53f0cbd 100644 --- a/arch/arm/cpu/armv7/sunxi/u-boot-spl.lds +++ b/arch/arm/cpu/armv7/sunxi/u-boot-spl.lds @@ -39,6 +39,11 @@ SECTIONS .data : { *(SORT_BY_ALIGNMENT(.data*)) } >.sram
. = ALIGN(4); + .u_boot_list : { + KEEP(*(SORT(.u_boot_list*))); + } > .sram + + . = ALIGN(4); __image_copy_end = .; _end = .;
diff --git a/arch/arm/include/asm/arch-sunxi/i2c.h b/arch/arm/include/asm/arch-sunxi/i2c.h new file mode 100644 index 0000000..dc5406b --- /dev/null +++ b/arch/arm/include/asm/arch-sunxi/i2c.h @@ -0,0 +1,15 @@ +/* + * Copyright 2014 - Hans de Goede hdegoede@redhat.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#ifndef _SUNXI_I2C_H_ +#define _SUNXI_I2C_H_ + +#include <asm/arch/cpu.h> + +#define CONFIG_I2C_MVTWSI_BASE SUNXI_TWI0_BASE +/* This is abp0-clk on sun4i/5i/7i / abp1-clk on sun6i/sun8i which is 24MHz */ +#define CONFIG_SYS_TCLK 24000000 + +#endif diff --git a/board/sunxi/board.c b/board/sunxi/board.c index b05d0b9..543b809 100644 --- a/board/sunxi/board.c +++ b/board/sunxi/board.c @@ -106,6 +106,13 @@ int board_mmc_init(bd_t *bis) } #endif
+void i2c_init_board(void) +{ + sunxi_gpio_set_cfgpin(SUNXI_GPB(0), SUNXI_GPB0_TWI0); + sunxi_gpio_set_cfgpin(SUNXI_GPB(1), SUNXI_GPB0_TWI0); + clock_twi_onoff(0, 1); +} + #ifdef CONFIG_SPL_BUILD void sunxi_board_init(void) { diff --git a/drivers/i2c/mvtwsi.c b/drivers/i2c/mvtwsi.c index d3457b9..ad1ce8f 100644 --- a/drivers/i2c/mvtwsi.c +++ b/drivers/i2c/mvtwsi.c @@ -22,6 +22,8 @@ #include <asm/arch/orion5x.h> #elif defined(CONFIG_KIRKWOOD) #include <asm/arch/kirkwood.h> +#elif defined(CONFIG_SUNXI) +#include <asm/arch/i2c.h> #else #error Driver mvtwsi not supported by SoC or board #endif @@ -30,6 +32,20 @@ * TWSI register structure */
+#ifdef CONFIG_SUNXI + +struct mvtwsi_registers { + u32 slave_address; + u32 xtnd_slave_addr; + u32 data; + u32 control; + u32 status; + u32 baudrate; + u32 soft_reset; +}; + +#else + struct mvtwsi_registers { u32 slave_address; u32 data; @@ -43,6 +59,8 @@ struct mvtwsi_registers { u32 soft_reset; };
+#endif + /* * Control register fields */ diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h index 3f04890..42b0d2e 100644 --- a/include/configs/sunxi-common.h +++ b/include/configs/sunxi-common.h @@ -161,6 +161,14 @@ #undef CONFIG_CMD_NET #undef CONFIG_CMD_NFS
+/* I2C */ +#define CONFIG_SPL_I2C_SUPPORT +#define CONFIG_SYS_I2C +#define CONFIG_SYS_I2C_MVTWSI +#define CONFIG_SYS_I2C_SPEED 400000 +#define CONFIG_SYS_I2C_SLAVE 0x7f +#define CONFIG_CMD_I2C + #ifndef CONFIG_CONS_INDEX #define CONFIG_CONS_INDEX 1 /* UART0 */ #endif