For the first time since at least the Allwinner A10 SoCs, the D1 (and related cores) use a new pincontroller MMIO register layout, so we cannot use our hardcoded, fixed offsets anymore. Ideally this would all be handled by devicetree and DM drivers, but for the DT-less SPL we still need the legacy interfaces.
Add a new Kconfig symbol to differenciate between the two generations of pincontrollers, and just use that to just switch some basic symbols. The rest is already abstracted enough, so works out of the box.
Signed-off-by: Andre Przywara andre.przywara@arm.com --- arch/arm/mach-sunxi/Kconfig | 6 ++++++ include/sunxi_gpio.h | 26 +++++++++++++++++++++----- 2 files changed, 27 insertions(+), 5 deletions(-)
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig index dff9f5ea947..a4a4e599b6a 100644 --- a/arch/arm/mach-sunxi/Kconfig +++ b/arch/arm/mach-sunxi/Kconfig @@ -158,6 +158,12 @@ config SUNXI_RVBAR_ALTERNATIVE config SUNXI_A64_TIMER_ERRATUM bool
+config SUNXI_NEW_PINCTRL + bool + ---help--- + The Allwinner D1 and other new SoCs use a different register map + for the GPIO block, which we need to know about in the SPL. + # Note only one of these may be selected at a time! But hidden choices are # not supported by Kconfig config SUNXI_GEN_SUN4I diff --git a/include/sunxi_gpio.h b/include/sunxi_gpio.h index fe89ff89bfa..34d67edf873 100644 --- a/include/sunxi_gpio.h +++ b/include/sunxi_gpio.h @@ -68,15 +68,32 @@ #define GPIO_DAT_REG_OFFSET 0x10
#define GPIO_DRV_REG_OFFSET 0x14 -#define GPIO_DRV_INDEX(pin) (((pin) & 0x1f) >> 4) -#define GPIO_DRV_OFFSET(pin) ((((pin) & 0x1f) & 0xf) << 1) + +/* Newer SoCs use a slightly different register layout */ +#ifdef CONFIG_SUNXI_NEW_PINCTRL +/* pin drive strength: 4 bits per pin */ +#define GPIO_DRV_INDEX(pin) ((pin) / 8) +#define GPIO_DRV_OFFSET(pin) (((pin) % 8) * 4) + +#define GPIO_PULL_REG_OFFSET 0x24 + +#define SUNXI_PINCTRL_BANK_SIZE 0x30 +#define SUNXI_GPIO_DISABLE 0xf + +#else /* older generation pin controllers */ +/* pin drive strength: 2 bits per pin */ +#define GPIO_DRV_INDEX(pin) ((pin) / 16) +#define GPIO_DRV_OFFSET(pin) (((pin) % 16) * 2)
#define GPIO_PULL_REG_OFFSET 0x1c + +#define SUNXI_PINCTRL_BANK_SIZE 0x24 +#define SUNXI_GPIO_DISABLE 0x7 +#endif + #define GPIO_PULL_INDEX(pin) (((pin) & 0x1f) >> 4) #define GPIO_PULL_OFFSET(pin) ((((pin) & 0x1f) & 0xf) << 1)
-#define SUNXI_PINCTRL_BANK_SIZE 0x24 - static inline void* BANK_TO_GPIO(int bank) { void *pio_base; @@ -132,7 +149,6 @@ enum sunxi_gpio_number { /* GPIO pin function config */ #define SUNXI_GPIO_INPUT 0 #define SUNXI_GPIO_OUTPUT 1 -#define SUNXI_GPIO_DISABLE 7
#define SUN8I_H3_GPA_UART0 2 #define SUN8I_H3_GPA_UART2 2