[PATCH V3] ARM: dts: stm32: Add KS8851-16MLL ethernet on FMC2

Patrice CHOTARD patrice.chotard at st.com
Fri Mar 27 09:55:34 CET 2020


Hi Marek

You have forgotten to take into account some of my previous remarks on V2

On 3/26/20 4:58 PM, Marek Vasut wrote:
> Add DT entries, Kconfig entries and board-specific entries to configure
> FMC2 bus and make KS8851-16MLL on that bus accessible to U-Boot.
>
> Signed-off-by: Marek Vasut <marex at denx.de>
> Cc: Patrick Delaunay <patrick.delaunay at st.com>
> Cc: Patrice Chotard <patrice.chotard at st.com>
> ---
> V2: Configure FMC2 nCS4 for SRAM as well
> V3: Adjust the register macros
> ---
>  arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi | 68 ++++++++++++++++++++++
>  board/dhelectronics/dh_stm32mp1/board.c    | 28 +++++++++
>  configs/stm32mp15_dhcom_basic_defconfig    |  1 +
>  3 files changed, 97 insertions(+)
>
> diff --git a/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi b/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi
> index 6c952a57ee..eba3588540 100644
> --- a/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi
> +++ b/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi
> @@ -37,6 +37,12 @@
>  			default-state = "on";
>  		};
>  	};
> +
> +	/* This is actually on FMC2, but we do not have bus driver for that */
> +	ksz8851: ks8851mll at 64000000 {
> +		compatible = "micrel,ks8851-mll";
> +		reg = <0x64000000 0x20000>;
> +	};
>  };
>  
>  &i2c4 {
> @@ -50,6 +56,68 @@
>  	};
>  };
>  
> +&pinctrl {
> +	/* These should bound to FMC2 bus driver, but we do not have one */
> +	pinctrl-0 = <&fmc_pins_b>;
> +	pinctrl-1 = <&fmc_sleep_pins_b>;
> +	pinctrl-names = "default", "sleep";
> +
> +	fmc_pins_b: fmc-0 {
> +		pins1 {
> +			pinmux = <STM32_PINMUX('D', 4, AF12)>, /* FMC_NOE */
> +				 <STM32_PINMUX('D', 5, AF12)>, /* FMC_NWE */
> +				 <STM32_PINMUX('B', 7, AF12)>, /* FMC_NL */
> +				 <STM32_PINMUX('D', 14, AF12)>, /* FMC_D0 */
> +				 <STM32_PINMUX('D', 15, AF12)>, /* FMC_D1 */
> +				 <STM32_PINMUX('D', 0, AF12)>, /* FMC_D2 */
> +				 <STM32_PINMUX('D', 1, AF12)>, /* FMC_D3 */
> +				 <STM32_PINMUX('E', 7, AF12)>, /* FMC_D4 */
> +				 <STM32_PINMUX('E', 8, AF12)>, /* FMC_D5 */
> +				 <STM32_PINMUX('E', 9, AF12)>, /* FMC_D6 */
> +				 <STM32_PINMUX('E', 10, AF12)>, /* FMC_D7 */
> +				 <STM32_PINMUX('E', 11, AF12)>, /* FMC_D8 */
> +				 <STM32_PINMUX('E', 12, AF12)>, /* FMC_D9 */
> +				 <STM32_PINMUX('E', 13, AF12)>, /* FMC_D10 */
> +				 <STM32_PINMUX('E', 14, AF12)>, /* FMC_D11 */
> +				 <STM32_PINMUX('E', 15, AF12)>, /* FMC_D12 */
> +				 <STM32_PINMUX('D', 8, AF12)>, /* FMC_D13 */
> +				 <STM32_PINMUX('D', 9, AF12)>, /* FMC_D14 */
> +				 <STM32_PINMUX('D', 10, AF12)>, /* FMC_D15 */
> +				 <STM32_PINMUX('G', 9, AF12)>, /* FMC_NE2_FMC_NCE */
> +				 <STM32_PINMUX('G', 12, AF12)>; /* FMC_NE4 */
> +			bias-disable;
> +			drive-push-pull;
> +			slew-rate = <3>;
> +		};
> +	};
> +
> +	fmc_sleep_pins_b: fmc-sleep-0 {
> +		pins {
> +			pinmux = <STM32_PINMUX('D', 4, ANALOG)>, /* FMC_NOE */
> +				 <STM32_PINMUX('D', 5, ANALOG)>, /* FMC_NWE */
> +				 <STM32_PINMUX('B', 7, ANALOG)>, /* FMC_NL */
> +				 <STM32_PINMUX('D', 14, ANALOG)>, /* FMC_D0 */
> +				 <STM32_PINMUX('D', 15, ANALOG)>, /* FMC_D1 */
> +				 <STM32_PINMUX('D', 0, ANALOG)>, /* FMC_D2 */
> +				 <STM32_PINMUX('D', 1, ANALOG)>, /* FMC_D3 */
> +				 <STM32_PINMUX('E', 7, ANALOG)>, /* FMC_D4 */
> +				 <STM32_PINMUX('E', 8, ANALOG)>, /* FMC_D5 */
> +				 <STM32_PINMUX('E', 9, ANALOG)>, /* FMC_D6 */
> +				 <STM32_PINMUX('E', 10, ANALOG)>, /* FMC_D7 */
> +				 <STM32_PINMUX('E', 11, ANALOG)>, /* FMC_D8 */
> +				 <STM32_PINMUX('E', 12, ANALOG)>, /* FMC_D9 */
> +				 <STM32_PINMUX('E', 13, ANALOG)>, /* FMC_D10 */
> +				 <STM32_PINMUX('E', 14, ANALOG)>, /* FMC_D11 */
> +				 <STM32_PINMUX('E', 15, ANALOG)>, /* FMC_D12 */
> +				 <STM32_PINMUX('D', 8, ANALOG)>, /* FMC_D13 */
> +				 <STM32_PINMUX('D', 9, ANALOG)>, /* FMC_D14 */
> +				 <STM32_PINMUX('D', 10, ANALOG)>, /* FMC_D15 */
> +				 <STM32_PINMUX('G', 9, ANALOG)>, /* FMC_NE2_FMC_NCE */
> +				 <STM32_PINMUX('G', 12, ANALOG)>; /* FMC_NE4 */
> +		};
> +	};
> +};
> +
>  &pmic {
>  	u-boot,dm-pre-reloc;
>  };
> diff --git a/board/dhelectronics/dh_stm32mp1/board.c b/board/dhelectronics/dh_stm32mp1/board.c
> index b663696983..be55242799 100644
> --- a/board/dhelectronics/dh_stm32mp1/board.c
> +++ b/board/dhelectronics/dh_stm32mp1/board.c
> @@ -376,6 +376,32 @@ static void sysconf_init(void)
>  #endif
>  }
>  
> +static void board_init_fmc2(void)
> +{
> +#define STM32_FMC2_BCR1		0x0
> +#define STM32_FMC2_BTR1		0x4
> +#define STM32_FMC2_BWTR1	0x104
> +#define STM32_FMC2_BCR(x)	((x) * 0x8 + STM32_FMC2_BCR1)
> +#define STM32_FMC2_BTR(x)	((x) * 0x8 + STM32_FMC2_BTR1)
> +#define STM32_FMC2_BWTR(x)	((x) * 0x8 + STM32_FMC2_BWTR1)


All these defines can be put in ./arch/arm/mach-stm32mp/include/mach/stm32.h

> +
> +#define RCC_MP_AHB6RSTCLRR	0x218
> +#define RCC_MP_AHB6ENSETR	0x19c
> +
> +	/* Set up FMC2 bus for KS8851-16MLL and X11 SRAM */
> +	writel(BIT(12), STM32_RCC_BASE + RCC_MP_AHB6RSTCLRR);
> +	writel(BIT(12), STM32_RCC_BASE + RCC_MP_AHB6ENSETR);
> +

Add a define for AHB6RSTCLRR and AHB6ENSETR BIT(12)


> +	/* KS8851-16MLL */
> +	writel(0x000010db, STM32_FMC2_BASE + STM32_FMC2_BCR(1));
> +	writel(0xc0022222, STM32_FMC2_BASE + STM32_FMC2_BTR(1));
> +	/* AS7C34098 SRAM on X11 */
> +	writel(0x000010db, STM32_FMC2_BASE + STM32_FMC2_BCR(3));
> +	writel(0xc0022222, STM32_FMC2_BASE + STM32_FMC2_BTR(3));
> +

Avoid to put hardcoded value, it difficult to see what is done, add defines.

> +	setbits_le32(STM32_FMC2_BASE + STM32_FMC2_BCR1, BIT(31));

Add a define for FMC2_BCR1 BIT(31) , it will be easier to understand what is done

thanks

Patrice


> +}
> +
>  /* board dependent setup after realloc */
>  int board_init(void)
>  {
> @@ -399,6 +425,8 @@ int board_init(void)
>  
>  	sysconf_init();
>  
> +	board_init_fmc2();
> +
>  	if (CONFIG_IS_ENABLED(CONFIG_LED))
>  		led_default_state();
>  
> diff --git a/configs/stm32mp15_dhcom_basic_defconfig b/configs/stm32mp15_dhcom_basic_defconfig
> index 921dea242a..683f15e7d5 100644
> --- a/configs/stm32mp15_dhcom_basic_defconfig
> +++ b/configs/stm32mp15_dhcom_basic_defconfig
> @@ -93,6 +93,7 @@ CONFIG_SPI_FLASH_MTD=y
>  CONFIG_SPL_SPI_FLASH_MTD=y
>  CONFIG_DM_ETH=y
>  CONFIG_DWC_ETH_QOS=y
> +CONFIG_KS8851_MLL=y
>  CONFIG_PHY=y
>  CONFIG_PHY_STM32_USBPHYC=y
>  CONFIG_PINCONF=y


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