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SubjectRe: [03/12] bus: stm32-fmc2-ebi: add STM32 FMC2 EBI controller driver
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On 3/23/20 3:58 PM, Christophe Kerello wrote:
> The driver adds the support for the STMicroelectronics FMC2 EBI controller
> found on STM32MP SOCs.
>

On DH STM32MP1 SoM in PDK2 carrier board,
Tested-by: Marek Vasut <marex@denx.de>

btw. it seems this sets BTRx DATLAT and CLKDIV to 0xf , it's "Don't
care" in the datasheet for Muxed mode, but then it should probably be
set to 0.

The bindings I used are below:

&fmc {
pinctrl-names = "default", "sleep";
pinctrl-0 = <&fmc_pins_b>;
pinctrl-1 = <&fmc_sleep_pins_b>;
status = "okay";
#address-cells = <1>;
#size-cells = <1>;
/delete-property/interrupts;
/delete-property/dmas;
/delete-property/dma-names;
reg = <0x58002000 0x1000>;
ranges;

ebi {
#address-cells = <2>;
#size-cells = <1>;
compatible = "st,stm32mp1-fmc2-ebi";
ranges = <0 0 0x60000000 0x4000000>,
<1 0 0x64000000 0x4000000>,
<2 0 0x68000000 0x4000000>,
<3 0 0x6c000000 0x4000000>;

ksz8851: ks8851mll@0,0 {
compatible = "micrel,ks8851-mll";
reg = <1 0x0 0x2 1 0x2 0x20000>;
interrupt-parent = <&gpioc>;
interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
bank-width = <2>;

/* Timing values are in nS */
st,fmc2_ebi_cs_mux_enable;
st,fmc2_ebi_cs_transaction_type = <4>;
st,fmc2_ebi_cs_buswidth = <16>;
st,fmc2_ebi_cs_address_setup = <6>;
st,fmc2_ebi_cs_address_hold = <6>;
st,fmc2_ebi_cs_data_setup = <127>;
st,fmc2_ebi_cs_bus_turnaround = <9>;
st,fmc2_ebi_cs_data_hold = <9>;
};

sram@3,0 {
compatible = "mtd-ram";
reg = <3 0x0 0x80000>;
bank-width = <2>;

/* Timing values are in nS */
st,fmc2_ebi_cs_mux_enable;
st,fmc2_ebi_cs_transaction_type = <4>;
st,fmc2_ebi_cs_buswidth = <16>;
st,fmc2_ebi_cs_address_setup = <6>;
st,fmc2_ebi_cs_address_hold = <6>;
st,fmc2_ebi_cs_data_setup = <127>;
st,fmc2_ebi_cs_bus_turnaround = <9>;
st,fmc2_ebi_cs_data_hold = <9>;
};
};
};

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