From 9d0826879e13e8139a7b169c2365225e848ff57e Mon Sep 17 00:00:00 2001 From: Jelle van der Waa Date: Thu, 14 Jan 2016 14:06:26 +0100 Subject: 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 ++ 6 files changed, 30 insertions(+) (limited to 'arch') 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 */ -- cgit v1.1