--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright (c) 2025 Facebook Inc.
+
+/dts-v1/;
+#include "aspeed-g6.dtsi"
+#include <dt-bindings/gpio/aspeed-gpio.h>
+#include <dt-bindings/i2c/i2c.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/leds/common.h>
+#include <dt-bindings/leds/leds-pca955x.h>
+#include <dt-bindings/usb/pd.h>
+
+/ {
+ model = "Facebook SanMiguel BMC";
+ compatible = "facebook,sanmiguel-bmc", "aspeed,ast2600";
+
+ aliases {
+ serial0 = &uart1;
+ serial1 = &uart2;
+ serial2 = &uart3;
+ serial3 = &uart4;
+ serial4 = &uart5;
+ i2c16 = &imux16;
+ i2c17 = &imux17;
+ i2c18 = &imux18;
+ i2c19 = &imux19;
+ };
+
+ chosen {
+ stdout-path = "serial4:57600n8";
+ };
+
+ iio-hwmon {
+ compatible = "iio-hwmon";
+ io-channels = <&adc0 0>, <&adc0 1>, <&adc0 2>, <&adc0 3>,
+ <&adc0 4>, <&adc0 5>, <&adc0 6>;
+ };
+
+ leds-fio {
+ compatible = "gpio-leds";
+ led-0 {
+ label = "power_blue";
+ gpios = <&fio_ioexp 4 GPIO_ACTIVE_HIGH>;
+ };
+ led-1 {
+ label = "power_amber";
+ gpios = <&fio_ioexp 5 GPIO_ACTIVE_LOW>;
+ };
+ led-2 {
+ label = "id_blue";
+ gpios = <&fio_ioexp 6 GPIO_ACTIVE_HIGH>;
+ };
+ led-3 {
+ label = "id_amber";
+ gpios = <&fio_ioexp 7 GPIO_ACTIVE_LOW>;
+ };
+ };
+
+ leds-smm {
+ compatible = "gpio-leds";
+ led-0 {
+ label = "bmc_heartbeat_amber";
+ gpios = <&gpio0 ASPEED_GPIO(P, 7) GPIO_ACTIVE_LOW>;
+ linux,default-trigger = "heartbeat";
+ };
+ };
+
+ memory@80000000 {
+ device_type = "memory";
+ reg = <0x80000000 0x80000000>;
+ };
+
+ spi2_gpio: spi {
+ compatible = "spi-gpio";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ sck-gpios = <&gpio0 ASPEED_GPIO(X, 3) GPIO_ACTIVE_HIGH>;
+ mosi-gpios = <&gpio0 ASPEED_GPIO(X, 4) GPIO_ACTIVE_HIGH>;
+ miso-gpios = <&gpio0 ASPEED_GPIO(X, 5) GPIO_ACTIVE_HIGH>;
+ cs-gpios = <&gpio0 ASPEED_GPIO(X, 2) GPIO_ACTIVE_LOW>;
+ num-chipselects = <1>;
+
+ tpm@0 {
+ compatible = "infineon,slb9670", "tcg,tpm_tis-spi";
+ spi-max-frequency = <33000000>;
+ reg = <0>;
+ };
+ };
+
+ standby_power_regulator: standby-power-regulator {
+ compatible = "regulator-fixed";
+ gpio = <&gpio0 ASPEED_GPIO(M, 3) GPIO_ACTIVE_HIGH>;
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-name = "standby_power";
+ enable-active-high;
+ regulator-always-on;
+ regulator-boot-on;
+
+ status = "okay";
+ };
+};
+
+&adc0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_adc0_default &pinctrl_adc1_default
+ &pinctrl_adc2_default &pinctrl_adc3_default
+ &pinctrl_adc4_default &pinctrl_adc5_default
+ &pinctrl_adc6_default>;
+ aspeed,int-vref-microvolt = <2500000>;
+
+ status = "okay";
+};
+
+&fmc {
+ status = "okay";
+
+ flash@0 {
+ label = "bmc";
+ spi-max-frequency = <50000000>;
+ m25p,fast-read;
+
+ status = "okay";
+#include "openbmc-flash-layout-128.dtsi"
+ };
+
+ flash@1 {
+ label = "alt-bmc";
+ spi-max-frequency = <50000000>;
+ m25p,fast-read;
+
+ status = "okay";
+#include "openbmc-flash-layout-128-alt.dtsi"
+ };
+};
+
+&gpio0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_gpiom4_unbiased_default
+ &pinctrl_gpiom5_unbiased_default
+ &pinctrl_gpiov4_unbiased_default
+ &pinctrl_gpiov7_unbiased_default>;
+
+ gpio-line-names =
+ /*A0-A7*/ "", "", "", "", "", "", "", "",
+ /*B0-B7*/ "", "", "", "", "", "", "", "",
+ /*C0-C7*/ "", "", "", "", "", "", "", "",
+ /*D0-D7*/ "", "", "", "", "", "FPGA_PEX_RST_L", "", "",
+ /*E0-E7*/ "RTL8221_PHY_RST_L-O", "RTL8211_PHY_INT_L-I", "", "",
+ "", "", "", "MUX_SGPIO_SEL-O",
+ /*F0-F7*/ "", "", "", "", "", "", "", "",
+ /*G0-G7*/ "", "", "", "", "", "", "", "",
+ /*H0-H7*/ "", "", "", "", "", "", "", "",
+ /*I0-I7*/ "", "", "", "",
+ "", "QSPI2_RST_L-O",
+ "GLOBAL_WP_BMC-I", "BMC_DDR4_TEN-O",
+ /*J0-J7*/ "", "", "", "", "", "", "", "",
+ /*K0-K7*/ "", "", "", "", "", "", "", "",
+ /*L0-L7*/ "", "", "", "", "", "", "", "",
+ /*M0-M7*/ "USB_HUB_RST_N-O", "BMC_FRU_WP-O",
+ "", "HMC_STBY_POWER_EN-O",
+ "STBY_POWER_PG-I", "PCIE_EP_RST_L-O", "", "",
+ /*N0-N7*/ "", "", "", "", "", "", "", "",
+ /*O0-O7*/ "", "", "", "", "", "", "", "",
+ /*P0-P7*/ "", "", "", "", "", "", "", "",
+ /*Q0-Q7*/ "", "", "", "", "", "", "", "",
+ /*R0-R7*/ "", "SP0_AP_INTR_N-I", "", "", "", "", "", "",
+ /*S0-S7*/ "", "", "", "", "", "", "", "",
+ /*T0-T7*/ "", "", "", "", "", "", "", "",
+ /*U0-U7*/ "", "", "", "", "", "", "", "",
+ /*V0-V7*/ "", "", "", "", "PCB_TEMP_ALERT-I", "", "", "",
+ /*W0-W7*/ "", "", "", "", "", "", "", "CPU_RST_L-I",
+ /*X0-X7*/ "", "", "", "", "", "", "", "",
+ /*Y0-Y7*/ "", "", "", "EMMC_RST-O", "", "", "", "",
+ /*Z0-Z7*/ "HMC_EROT_SPI_INT_L-I", "", "", "", "", "", "", "";
+};
+
+&gpio1 {
+ /* 36 1.8V GPIOs */
+ gpio-line-names =
+ /*A0-A7*/ "", "", "", "", "", "", "", "",
+ /*B0-B7*/ "", "", "", "",
+ "AP_EROT_REQ-O", "EROT_AP_GNT-I",
+ "IO_EXPANDER_INT_L-I", "",
+ /*C0-C7*/ "", "", "", "", "", "", "", "",
+ /*D0-D7*/ "", "", "", "", "", "", "", "I2C_SSIF_ALERT_L-I",
+ /*E0-E7*/ "", "", "", "", "", "", "", "";
+};
+
+&i2c0 {
+ status = "okay";
+
+ ssif-bmc@10 {
+ compatible = "ssif-bmc";
+ reg = <0x10>;
+ };
+};
+
+&i2c1 {
+ status = "okay";
+};
+
+&i2c2 {
+ status = "okay";
+
+ hpm0_ioexp_20: gpio@20 {
+ compatible = "nxp,pca9555";
+ reg = <0x20>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-parent = <&gpio1>;
+ interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+ vcc-supply = <&standby_power_regulator>;
+
+ gpio-line-names =
+ "B0_M0_SHDN_FORCE_L-O",
+ "B0_M0_STBY_POWER_PG-I",
+ "B0_M0_THERM_OVERT_L-I",
+ "B0_M0_THERM_WARN_L-I",
+ "B0_M0_GLOBAL_WP-O",
+ "B0_M0_USB_HUB0_RST_L-O",
+ "B0_M0_PRE_SYS_RST_L-O",
+ "B0_M0_LEAK_DETECT_ALERT_L-I",
+ "B0_M0_RUN_POWER_EN-O",
+ "B0_M0_RUN_POWER_PG-I",
+ "B0_M0_CPU_CHIPTHROT_L-O",
+ "B0_M0_SHDN_REQ_L-O",
+ "B0_M0_CPU_SHDN_OK_L-I",
+ "B0_M0_CPLD_READY-I",
+ "B0_M0_PWR_BRAKE_L-O",
+ "B0_M0_PWR_BRAKE_STATUS_L-I";
+ };
+
+ hpm0_ioexp_21: gpio@21 {
+ compatible = "nxp,pca9555";
+ reg = <0x21>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-parent = <&gpio1>;
+ interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+ vcc-supply = <&standby_power_regulator>;
+
+ gpio-line-names =
+ "B0_M0_I2C_BUS_MUX_RESET_L-O",
+ "B0_M0_HPM_MCU_OK-I",
+ "B0_M0_CPU_L0_RST_IND_L-O",
+ "B0_M0_C0_SOCAMM_DAC_SEL0-O",
+ "B0_M0_C1_SOCAMM_DAC_SEL1-O",
+ "B0_M0_C0_SOCAMM_I2C_SEL_R-O",
+ "B0_M0_C1_SOCAMM_I2C_SEL_R-O",
+ "B0_M0_EEPROM_POWER_DISABLE-O",
+ "B0_M0_L0L1_RST_L-I",
+ "B0_M0_L2_RST_L-I",
+ "B0_M0_BRD_ID_0-I",
+ "B0_M0_BRD_ID_1-I",
+ "B0_M0_BMC_LEAK_TEST_L-O",
+ "B0_M0_MCU_BMC_ALERT_L-I",
+ "B0_M0_CPU_BOOT_COMPLETE_3V3-I",
+ "B0_M0_BMC_TO_GPU_MCU_I2C_EN-O";
+ };
+};
+
+&i2c3 {
+ status = "okay";
+};
+
+&i2c4 {
+ status = "okay";
+};
+
+&i2c5 {
+ status = "okay";
+
+ smm_ioexp_20: gpio@20 {
+ compatible = "nxp,pca9555";
+ reg = <0x20>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-parent = <&gpio1>;
+ interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+
+ gpio-line-names =
+ "HMC_RST_R_L-O", "HMC_RECOVERY_R-O",
+ "HMC_SPI_MUX_R_SEL-O", "GLOBAL_WP-O",
+ "HMC_READY-I", "HMC_PRSNT_R-I",
+ "BMC_SELF_PWR_CYCLE-O", "EEDO_LED2-O",
+ "PWR_LED_L-O", "PWR_BTN_L-I",
+ "UID_LED_L-O", "UID_BTN_L-I",
+ "FAULT_LED_L-O", "USB2_HUB_RST_L-O",
+ "USB2_BMC_HUB2_RST_L-O", "WARN_LED_L-O";
+ };
+
+ smm_ioexp_21: gpio@21 {
+ compatible = "nxp,pca9555";
+ reg = <0x21>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-parent = <&gpio1>;
+ interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+
+ gpio-line-names =
+ "BMC_HMC_MUX_SEL-O", "BMC_TPM_MUX_SEL-O",
+ "BMC_USB2_MUX_SEL-O", "HMC_PGOOD_3V3-I",
+ "", "HDR_SPI_PRSNT_L-I",
+ "SW_NRESET_R_L-O", "MUX_I2C_ESPI_SEL-O",
+ "I2C_BUS_MUX_RESET_L-O", "USB_MUX_EN-O",
+ "PDB_TRAY_RST-O", "USB_PWR_EN-O",
+ "RTC_CLR_L-O", "I2C_RTC_ALERT_L-I",
+ "X86_TPM_RST_SEL_L-O", "BMC_MUX_PI3DP_SEL-O";
+ };
+
+ smm_temp: temperature-sensor@48 {
+ compatible = "national,lm75";
+ reg = <0x48>;
+ };
+
+ smm_fru: eeprom@50 {
+ compatible = "atmel,24c128";
+ reg = <0x50>;
+ };
+
+ rtc@6f {
+ compatible = "nuvoton,nct3018y";
+ reg = <0x6f>;
+ };
+};
+
+&i2c6 {
+ status = "okay";
+
+ hmc_ioexp: gpio@20 {
+ compatible = "ti,tca6408";
+ reg = <0x20>;
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ gpio-line-names =
+ "", "", "HMC_EROT_FATAL_ERROR_L-I", "",
+ "", "HMC_EROT_RECOVERY_L-O", "HMC_EROT_RESET_L-O", "";
+ };
+
+ i2c-mux@70 {
+ compatible = "nxp,pca9546";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x70>;
+ i2c-mux-idle-disconnect;
+
+ imux16: i2c@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0>;
+ };
+
+ imux17: i2c@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <1>;
+ };
+
+ imux18: i2c@2 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <2>;
+ };
+
+ imux19: i2c@3 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <3>;
+ };
+ };
+};
+
+&i2c7 {
+ status = "okay";
+
+ hpm1_ioexp_20: gpio@20 {
+ compatible = "nxp,pca9555";
+ reg = <0x20>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-parent = <&gpio1>;
+ interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+ vcc-supply = <&standby_power_regulator>;
+
+ gpio-line-names =
+ "B1_M0_SHDN_FORCE_L-O",
+ "B1_M0_STBY_POWER_PG-I",
+ "B1_M0_THERM_OVERT_L-I",
+ "B1_M0_THERM_WARN_L-I",
+ "B1_M0_GLOBAL_WP-O",
+ "B1_M0_USB_HUB0_RST_L-O",
+ "B1_M0_PRE_SYS_RST_L-O",
+ "B1_M0_LEAK_DETECT_ALERT_L-I",
+ "B1_M0_RUN_POWER_EN-O",
+ "B1_M0_RUN_POWER_PG-I",
+ "B1_M0_CPU_CHIPTHROT_L-O",
+ "B1_M0_SHDN_REQ_L-O",
+ "B1_M0_CPU_SHDN_OK_L-I",
+ "B1_M0_CPLD_READY-I",
+ "B1_M0_PWR_BRAKE_L-O",
+ "B1_M0_PWR_BRAKE_STATUS_L-I";
+ };
+
+ hpm1_ioexp_21: gpio@21 {
+ compatible = "nxp,pca9555";
+ reg = <0x21>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-parent = <&gpio1>;
+ interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+ vcc-supply = <&standby_power_regulator>;
+
+ gpio-line-names =
+ "B1_M0_I2C_BUS_MUX_RESET_L-O",
+ "B1_M0_HPM_MCU_OK-I",
+ "B1_M0_CPU_L0_RST_IND_L-O",
+ "B1_M0_C0_SOCAMM_DAC_SEL0-O",
+ "B1_M0_C1_SOCAMM_DAC_SEL1-O",
+ "B1_M0_C0_SOCAMM_I2C_SEL_R-O",
+ "B1_M0_C1_SOCAMM_I2C_SEL_R-O",
+ "B1_M0_EEPROM_POWER_DISABLE-O",
+ "B1_M0_L0L1_RST_L-I",
+ "B1_M0_L2_RST_L-I",
+ "B1_M0_BRD_ID_0-I",
+ "B1_M0_BRD_ID_1-I",
+ "B1_M0_BMC_LEAK_TEST_L-O",
+ "B1_M0_MCU_BMC_ALERT_L-I",
+ "B1_M0_CPU_BOOT_COMPLETE_3V3-I",
+ "B1_M0_BMC_TO_GPU_MCU_I2C_EN-O";
+ };
+};
+
+&i2c8 {
+ status = "okay";
+};
+
+&i2c9 {
+ status = "okay";
+
+ pdb_mps_hsc1: power-monitor@10 {
+ compatible = "mps,mp5926";
+ reg = <0x10>;
+ };
+
+ pdb_ti_hsc1: power-monitor@11 {
+ compatible = "ti,lm5066i";
+ reg = <0x11>;
+ shunt-resistor-micro-ohms = <763>;
+ };
+
+ pdb_mps_hsc2: power-monitor@12 {
+ compatible = "mps,mp5926";
+ reg = <0x12>;
+ };
+
+ pdb_ti_hsc2: power-monitor@13 {
+ compatible = "ti,lm5066i";
+ reg = <0x13>;
+ shunt-resistor-micro-ohms = <294>;
+ };
+
+ pdb_mps_hsc3: power-monitor@14 {
+ compatible = "mps,mp5926";
+ reg = <0x14>;
+ };
+
+ pdb_ti_hsc3: power-monitor@15 {
+ compatible = "ti,lm5066i";
+ reg = <0x15>;
+ shunt-resistor-micro-ohms = <294>;
+ };
+
+ pdb_mps_hsc4: power-monitor@16 {
+ compatible = "mps,mp5926";
+ reg = <0x16>;
+ };
+
+ pdb_ti_hsc4: power-monitor@17 {
+ compatible = "ti,lm5066i";
+ reg = <0x17>;
+ shunt-resistor-micro-ohms = <381>;
+ };
+
+ pdb_ioexp_20: gpio@20 {
+ compatible = "nxp,pca9555";
+ reg = <0x20>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-parent = <&gpio1>;
+ interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+
+ gpio-line-names =
+ "PDB_STRAP-I", "STBY_POWER_EN-O", "STBY_PWR_OK-I", "",
+ "", "MAIN_PWR_EN-O", "MAIN_PWR_OK-I", "GLOBAL_WP-O",
+ "PDB_PWR_BRK_L-I", "FAN_PRSNT-I", "", "",
+ "HSC4_S5_OR_S0_N-O", "", "", "";
+ };
+
+ pdb_temp: temperature-sensor@4e {
+ compatible = "national,lm75";
+ reg = <0x4e>;
+ };
+
+ pdb_fru: eeprom@50 {
+ compatible = "atmel,24c128";
+ reg = <0x50>;
+ };
+};
+
+&i2c10 {
+ status = "okay";
+
+ scm_temp: temperature-sensor@48 {
+ compatible = "national,lm75";
+ reg = <0x48>;
+ };
+
+ scm_fru: eeprom@50 {
+ compatible = "atmel,24c128";
+ reg = <0x50>;
+ };
+};
+
+&i2c11 {
+ status = "okay";
+
+ sw_config: eeprom@50 {
+ compatible = "atmel,24c64";
+ reg = <0x50>;
+ };
+};
+
+&i2c12 {
+ status = "okay";
+};
+
+&i2c13 {
+ status = "okay";
+ mctp-controller;
+ multi-master;
+
+ mctp@10 {
+ compatible = "mctp-i2c-controller";
+ reg = <(0x10 | I2C_OWN_SLAVE_ADDRESS)>;
+ };
+
+ smm_ext_ioexp: gpio@38 {
+ compatible = "nxp,pca9554";
+ reg = <0x38>;
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ gpio-line-names =
+ "SSD0_PRSNT_L-I", "E1S_PWR_EN-O",
+ "SSD0_PWRDIS-O", "I2C_PDB_ALERT_L-I",
+ "BMC_SSD0_RST_L-O", "GLOBAL_WP_E1S-O",
+ "12V_SSD0_PGD-I", "SSD0_LED-O";
+ };
+
+ smm_ext_fru: eeprom@55 {
+ compatible = "atmel,24c128";
+ reg = <0x55>;
+ };
+};
+
+&i2c14 {
+ status = "okay";
+
+ fio_ioexp: gpio@20 {
+ compatible = "nxp,pca9555";
+ reg = <0x20>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-parent = <&gpio1>;
+ interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+
+ gpio-line-names =
+ "", "", "", "",
+ "PWR_LED_BLUE", "PWR_LED_AMBER_R_N",
+ "BEEP_ID_LED_BLUE", "BEEP_ID_LED_AMBER_R_N",
+ "", "", "", "",
+ "FM_MAIN_PWREN_RMC_ISO_EN_N", "LEAK_DETECT_RMC_N",
+ "PWRGD_RMC_N", "SMALL_LEAK_RMC_N";
+
+ pwrgd-rmc-hog {
+ gpio-hog;
+ gpios = <14 GPIO_ACTIVE_LOW>;
+ output-low;
+ };
+ };
+
+ fio_fru: eeprom@50 {
+ compatible = "atmel,24c64";
+ reg = <0x50>;
+ };
+};
+
+&i2c15 {
+ status = "okay";
+};
+
+&mdio0 {
+ status = "okay";
+
+ ethphy0: ethernet-phy@0 {
+ compatible = "ethernet-phy-ieee802.3-c22";
+ reg = <0>;
+ };
+};
+
+&mac0 {
+ pinctrl-names = "default";
+ phy-mode = "rgmii-id";
+ phy-handle = <ðphy0>;
+ pinctrl-0 = <&pinctrl_rgmii1_default>;
+
+ status = "okay";
+};
+
+&pinctrl {
+ pinctrl_gpiom4_unbiased_default: gpiom4 {
+ pins = "B12";
+ bias-disable;
+ };
+ pinctrl_gpiom5_unbiased_default: gpiom5 {
+ pins = "C12";
+ bias-disable;
+ };
+ pinctrl_gpiov4_unbiased_default: gpiov4 {
+ pins = "AE15";
+ bias-disable;
+ };
+ pinctrl_gpiov7_unbiased_default: gpiov7 {
+ pins = "AF15";
+ bias-disable;
+ };
+};
+
+&uart1 {
+ status = "okay";
+};
+
+&uart3 {
+ status = "okay";
+};
+
+&uart5 {
+ status = "okay";
+};
+
+&uart_routing {
+ status = "okay";
+};
+
+&wdt1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_wdtrst1_default>;
+ aspeed,reset-type = "soc";
+ aspeed,external-signal;
+ aspeed,ext-push-pull;
+ aspeed,ext-active-high;
+ aspeed,ext-pulse-duration = <256>;
+
+ status = "okay";
+};
projects / thirdparty / kernel / linux.git / commitdiff
