Hi,
On Wed, Apr 24, 2019 at 01:44:12PM +0800, Icenowy Zheng wrote:
The Allwinner H6 SoC has a register to set the PIO banks' voltage. When it mismatches the real voltage supplied to the VCC to the PIO supply, the PIO will work improperly.
The PIO controller also has a register that contains the status of each VCC rail of the PIO supplies, and it has the same definition with the configuration register. so we can just copy the content of this register to the configuration register at startup, to ensure the configuration is correct at startup stage.
Signed-off-by: Icenowy Zheng icenowy@aosc.io
arch/arm/include/asm/arch-sunxi/gpio.h | 3 +++ arch/arm/mach-sunxi/board.c | 9 +++++++++ 2 files changed, 12 insertions(+)
diff --git a/arch/arm/include/asm/arch-sunxi/gpio.h b/arch/arm/include/asm/arch-sunxi/gpio.h index 40a3f845d0..a646ea6a3c 100644 --- a/arch/arm/include/asm/arch-sunxi/gpio.h +++ b/arch/arm/include/asm/arch-sunxi/gpio.h @@ -73,6 +73,9 @@ struct sunxi_gpio_reg { struct sunxi_gpio_int gpio_int; };
+#define SUN50I_H6_GPIO_POW_MOD_SEL 0x340 +#define SUN50I_H6_GPIO_POW_MOD_VAL 0x348
#define BANK_TO_GPIO(bank) (((bank) < SUNXI_GPIO_L) ? \ &((struct sunxi_gpio_reg *)SUNXI_PIO_BASE)->gpio_bank[bank] : \ &((struct sunxi_gpio_reg *)SUNXI_R_PIO_BASE)->gpio_bank[(bank) - SUNXI_GPIO_L]) diff --git a/arch/arm/mach-sunxi/board.c b/arch/arm/mach-sunxi/board.c index c6dd7b8e54..bd3b5d8303 100644 --- a/arch/arm/mach-sunxi/board.c +++ b/arch/arm/mach-sunxi/board.c @@ -65,6 +65,7 @@ struct mm_region *mem_map = sunxi_mem_map;
static int gpio_init(void)
Does this really run after regulators are turned on? If not, how will the SoC detect voltages correctly?
regards, o.
{
- __maybe__unused uint val;
#if CONFIG_CONS_INDEX == 1 && defined(CONFIG_UART0_PORT_F) #if defined(CONFIG_MACH_SUN4I) || \ defined(CONFIG_MACH_SUN7I) || \ @@ -139,6 +140,14 @@ static int gpio_init(void) #error Unsupported console port number. Please fix pin mux settings in board.c #endif
+#ifdef CONFIG_MACH_SUN50I_H6
- /* Update PIO power bias configuration by copy hardware detected value */
- val = readl(SUNXI_PIO_BASE + SUN50I_H6_GPIO_POW_MOD_VAL);
- writel(val, SUNXI_PIO_BASE + SUN50I_H6_GPIO_POW_MOD_SEL);
- val = readl(SUNXI_R_PIO_BASE + SUN50I_H6_GPIO_POW_MOD_VAL);
- writel(val, SUNXI_R_PIO_BASE + SUN50I_H6_GPIO_POW_MOD_SEL);
+#endif
- return 0;
}
-- 2.18.1
U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot