From 9d0826879e13e8139a7b169c2365225e848ff57e Mon Sep 17 00:00:00 2001 From: Jelle van der Waa Date: Thu, 14 Jan 2016 14:06:26 +0100 Subject: [PATCH] sunxi: Add support for the I2C controller which is part of the PRCM Signed-off-by: Jelle van der Waa [hdegoede@redhat.com: Minor cleanups] Signed-off-by: Hans de Goede applied with fixing 2 checkpatch warnings: WARNING: please, no space before tabs Signed-off-by: Heiko Schocher --- arch/arm/cpu/armv7/sunxi/clock_sun6i.c | 10 ++++++++++ arch/arm/cpu/armv7/sunxi/prcm.c | 12 ++++++++++++ arch/arm/include/asm/arch-sunxi/cpu_sun4i.h | 1 + arch/arm/include/asm/arch-sunxi/gpio.h | 2 ++ arch/arm/include/asm/arch-sunxi/i2c.h | 3 +++ arch/arm/include/asm/arch-sunxi/prcm.h | 2 ++ board/sunxi/Kconfig | 6 ++++++ board/sunxi/board.c | 6 ++++++ configs/orangepi_pc_defconfig | 1 + drivers/i2c/mvtwsi.c | 11 +++++++++++ include/configs/sunxi-common.h | 2 +- 11 files changed, 55 insertions(+), 1 deletion(-) diff --git a/arch/arm/cpu/armv7/sunxi/clock_sun6i.c b/arch/arm/cpu/armv7/sunxi/clock_sun6i.c index 4501884..1da5455 100644 --- a/arch/arm/cpu/armv7/sunxi/clock_sun6i.c +++ b/arch/arm/cpu/armv7/sunxi/clock_sun6i.c @@ -77,6 +77,16 @@ int clock_twi_onoff(int port, int state) struct sunxi_ccm_reg *const ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; + if (port == 5) { + if (state) + prcm_apb0_enable( + PRCM_APB0_GATE_PIO | PRCM_APB0_GATE_I2C); + else + prcm_apb0_disable( + PRCM_APB0_GATE_PIO | PRCM_APB0_GATE_I2C); + return 0; + } + /* set the apb clock gate for twi */ if (state) setbits_le32(&ccm->apb2_gate, diff --git a/arch/arm/cpu/armv7/sunxi/prcm.c b/arch/arm/cpu/armv7/sunxi/prcm.c index 19b4938..e1d091f 100644 --- a/arch/arm/cpu/armv7/sunxi/prcm.c +++ b/arch/arm/cpu/armv7/sunxi/prcm.c @@ -33,3 +33,15 @@ void prcm_apb0_enable(u32 flags) /* deassert reset for module */ setbits_le32(&prcm->apb0_reset, flags); } + +void prcm_apb0_disable(u32 flags) +{ + struct sunxi_prcm_reg *prcm = + (struct sunxi_prcm_reg *)SUNXI_PRCM_BASE; + + /* assert reset for module */ + clrbits_le32(&prcm->apb0_reset, flags); + + /* close the clock for module */ + clrbits_le32(&prcm->apb0_gate, flags); +} diff --git a/arch/arm/include/asm/arch-sunxi/cpu_sun4i.h b/arch/arm/include/asm/arch-sunxi/cpu_sun4i.h index 63b161a..0cdefdc 100644 --- a/arch/arm/include/asm/arch-sunxi/cpu_sun4i.h +++ b/arch/arm/include/asm/arch-sunxi/cpu_sun4i.h @@ -134,6 +134,7 @@ #define SUNXI_RTC_BASE 0x01f00000 #define SUNXI_PRCM_BASE 0x01f01400 #define SUN6I_CPUCFG_BASE 0x01f01c00 +#define SUNXI_R_TWI_BASE 0x01f02400 #define SUNXI_R_UART_BASE 0x01f02800 #define SUNXI_R_PIO_BASE 0x01f02c00 #define SUN6I_P2WI_BASE 0x01f03400 diff --git a/arch/arm/include/asm/arch-sunxi/gpio.h b/arch/arm/include/asm/arch-sunxi/gpio.h index a2a9a38..649f6cd 100644 --- a/arch/arm/include/asm/arch-sunxi/gpio.h +++ b/arch/arm/include/asm/arch-sunxi/gpio.h @@ -199,6 +199,8 @@ enum sunxi_gpio_number { #define SUN6I_GPL1_R_P2WI_SDA 3 #define SUN8I_GPL_R_RSB 2 +#define SUN8I_H3_GPL_R_TWI 2 +#define SUN8I_A23_GPL_R_TWI 3 #define SUN8I_GPL_R_UART 2 #define SUN9I_GPN_R_RSB 3 diff --git a/arch/arm/include/asm/arch-sunxi/i2c.h b/arch/arm/include/asm/arch-sunxi/i2c.h index 561cd2b..4dfd313 100644 --- a/arch/arm/include/asm/arch-sunxi/i2c.h +++ b/arch/arm/include/asm/arch-sunxi/i2c.h @@ -23,6 +23,9 @@ #ifdef CONFIG_I2C4_ENABLE #define CONFIG_I2C_MVTWSI_BASE4 SUNXI_TWI4_BASE #endif +#ifdef CONFIG_R_I2C_ENABLE +#define CONFIG_I2C_MVTWSI_BASE5 SUNXI_R_TWI_BASE +#endif /* This is abp0-clk on sun4i/5i/7i / abp1-clk on sun6i/sun8i which is 24MHz */ #define CONFIG_SYS_TCLK 24000000 diff --git a/arch/arm/include/asm/arch-sunxi/prcm.h b/arch/arm/include/asm/arch-sunxi/prcm.h index 82ed541..556c1af 100644 --- a/arch/arm/include/asm/arch-sunxi/prcm.h +++ b/arch/arm/include/asm/arch-sunxi/prcm.h @@ -236,5 +236,7 @@ struct sunxi_prcm_reg { }; void prcm_apb0_enable(u32 flags); +void prcm_apb0_disable(u32 flags); + #endif /* __ASSEMBLY__ */ #endif /* _PRCM_H */ diff --git a/board/sunxi/Kconfig b/board/sunxi/Kconfig index 9d67847..7c69be9 100644 --- a/board/sunxi/Kconfig +++ b/board/sunxi/Kconfig @@ -363,6 +363,12 @@ config I2C3_ENABLE See I2C0_ENABLE help text. endif +config R_I2C_ENABLE + bool "Enable the PRCM I2C/TWI controller" + default n + ---help--- + Set this to y to enable the I2C controller which is part of the PRCM. + if MACH_SUN7I config I2C4_ENABLE bool "Enable I2C/TWI controller 4" diff --git a/board/sunxi/board.c b/board/sunxi/board.c index 386e2e0..1cc39e4 100644 --- a/board/sunxi/board.c +++ b/board/sunxi/board.c @@ -422,6 +422,12 @@ void i2c_init_board(void) clock_twi_onoff(4, 1); #endif #endif + +#ifdef CONFIG_R_I2C_ENABLE + clock_twi_onoff(5, 1); + sunxi_gpio_set_cfgpin(SUNXI_GPL(0), SUN8I_H3_GPL_R_TWI); + sunxi_gpio_set_cfgpin(SUNXI_GPL(1), SUN8I_H3_GPL_R_TWI); +#endif } #ifdef CONFIG_SPL_BUILD diff --git a/configs/orangepi_pc_defconfig b/configs/orangepi_pc_defconfig index 358caa5..ea9ed87 100644 --- a/configs/orangepi_pc_defconfig +++ b/configs/orangepi_pc_defconfig @@ -12,3 +12,4 @@ CONFIG_SPL=y # CONFIG_CMD_FLASH is not set # CONFIG_CMD_FPGA is not set CONFIG_CMD_GPIO=y +CONFIG_R_I2C_ENABLE=y diff --git a/drivers/i2c/mvtwsi.c b/drivers/i2c/mvtwsi.c index 30a5b11..5f993b9 100644 --- a/drivers/i2c/mvtwsi.c +++ b/drivers/i2c/mvtwsi.c @@ -128,6 +128,10 @@ static struct mvtwsi_registers *twsi_get_base(struct i2c_adapter *adap) case 4: return (struct mvtwsi_registers *) CONFIG_I2C_MVTWSI_BASE4; #endif +#ifdef CONFIG_I2C_MVTWSI_BASE5 + case 5: + return (struct mvtwsi_registers *) CONFIG_I2C_MVTWSI_BASE5; +#endif default: printf("Missing mvtwsi controller %d base\n", adap->hwadapnr); break; @@ -487,3 +491,10 @@ U_BOOT_I2C_ADAP_COMPLETE(twsi4, twsi_i2c_init, twsi_i2c_probe, CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE, 4) #endif +#ifdef CONFIG_I2C_MVTWSI_BASE5 +U_BOOT_I2C_ADAP_COMPLETE(twsi5, twsi_i2c_init, twsi_i2c_probe, + twsi_i2c_read, twsi_i2c_write, + twsi_i2c_set_bus_speed, + CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE, 5) + +#endif diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h index 790e704..b4dfb3c 100644 --- a/include/configs/sunxi-common.h +++ b/include/configs/sunxi-common.h @@ -212,7 +212,7 @@ #if defined CONFIG_I2C0_ENABLE || defined CONFIG_I2C1_ENABLE || \ defined CONFIG_I2C2_ENABLE || defined CONFIG_I2C3_ENABLE || \ - defined CONFIG_I2C4_ENABLE + defined CONFIG_I2C4_ENABLE || defined CONFIG_R_I2C_ENABLE #define CONFIG_SYS_I2C #define CONFIG_SYS_I2C_MVTWSI #define CONFIG_SYS_I2C_SPEED 400000