sunxi: Add support for the I2C controller which is part of the PRCM

Signed-off-by: Jelle van der Waa <jelle@vdwaa.nl>
[hdegoede@redhat.com: Minor cleanups]
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
applied with fixing 2 checkpatch warnings:
WARNING: please, no space before tabs

Signed-off-by: Heiko Schocher <hs@denx.de>

diff --git a/arch/arm/cpu/armv7/sunxi/clock_sun6i.c b/arch/arm/cpu/armv7/sunxi/clock_sun6i.c
index 4501884..1da5455 100644 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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