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drivers: entropy: rv32m1_trng: Add DTS support to rv32m1_trng driver

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Add a YAML, DTS node and driver support to utilize data from devicetree
for register address and driver name.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
This commit is contained in:
Kumar Gala 2020-04-01 11:10:31 -05:00 • committed by Ioannis Glaropoulos
commit 0be9d2b18d
7 changed files with 42 additions and 2 deletions
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1
drivers/entropy/Kconfig.rv32m1
View file

@ -7,6 +7,7 @@ config ENTROPY_RV32M1_TRNG
bool "RV32M1 TRNG driver" bool "RV32M1 TRNG driver"
depends on SOC_OPENISA_RV32M1_RISCV32 depends on SOC_OPENISA_RV32M1_RISCV32
select ENTROPY_HAS_DRIVER select ENTROPY_HAS_DRIVER
select HAS_DTS_ENTROPY
help help
This option enables the true random number generator (TRNG) This option enables the true random number generator (TRNG)
driver based on the RV32M1 TRNG driver. driver based on the RV32M1 TRNG driver.

6
drivers/entropy/entropy_rv32m1_trng.c
View file

@ -4,6 +4,8 @@
* SPDX-License-Identifier: Apache-2.0 * SPDX-License-Identifier: Apache-2.0
*/ */
#define DT_DRV_COMPAT openisa_rv32m1_trng
#include <device.h> #include <device.h>
#include <drivers/entropy.h> #include <drivers/entropy.h>
#include <random/rand32.h> #include <random/rand32.h>
@ -34,12 +36,12 @@ static const struct entropy_driver_api entropy_rv32m1_trng_api_funcs = {
}; };
static struct rv32m1_entropy_config entropy_rv32m1_config = { static struct rv32m1_entropy_config entropy_rv32m1_config = {
.base = TRNG .base = (TRNG_Type *)DT_INST_REG_ADDR(0)
}; };
static int entropy_rv32m1_trng_init(struct device *); static int entropy_rv32m1_trng_init(struct device *);
DEVICE_AND_API_INIT(entropy_rv32m1_trng, CONFIG_ENTROPY_NAME, DEVICE_AND_API_INIT(entropy_rv32m1_trng, DT_INST_LABEL(0),
entropy_rv32m1_trng_init, NULL, &entropy_rv32m1_config, entropy_rv32m1_trng_init, NULL, &entropy_rv32m1_config,
PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEVICE, PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
&entropy_rv32m1_trng_api_funcs); &entropy_rv32m1_trng_api_funcs);

18
dts/bindings/rng/openisa,rv32m1-trng.yaml Normal file
View file

@ -0,0 +1,18 @@
# Copyright (c) 2020, Linaro Limited
# SPDX-License-Identifier: Apache-2.0
description: OpenISA TRNG (True Random Number Generator)
compatible: "openisa,rv32m1-trng"
include: base.yaml
properties:
reg:
required: true
interrupts:
required: true
label:
required: true

8
dts/riscv/rv32m1.dtsi
View file

@ -525,6 +525,14 @@
#pwm-cells = <3>; #pwm-cells = <3>;
}; };
trng: random@41029000{
compatible = "openisa,rv32m1-trng";
reg = <0x41029000 0x1000>;
status = "okay";
interrupts = <13 0>;
label = "TRNG";
};
pwm3: pwm@4102d000 { pwm3: pwm@4102d000 {
compatible = "openisa,rv32m1-tpm"; compatible = "openisa,rv32m1-tpm";
reg = <0x4102d000 0x88>; reg = <0x4102d000 0x88>;

5
dts/riscv/rv32m1_ri5cy.dtsi
View file

@ -215,3 +215,8 @@
interrupt-parent = <&intmux0_ch1>; interrupt-parent = <&intmux0_ch1>;
interrupts = <23>; interrupts = <23>;
}; };
&trng {
interrupt-parent = <&intmux0_ch1>;
interrupts = <20>;
};

5
dts/riscv/rv32m1_zero_riscy.dtsi
View file

@ -214,3 +214,8 @@
interrupt-parent = <&event1>; interrupt-parent = <&event1>;
interrupts = <15>; interrupts = <15>;
}; };
&trng {
interrupt-parent = <&event1>;
interrupts = <12>;
};

1
soc/riscv/openisa_rv32m1/dts_fixup.h
View file

@ -11,6 +11,7 @@
#define DT_FLASH_DEV_BASE_ADDRESS DT_OPENISA_RV32M1_FTFE_40023000_BASE_ADDRESS #define DT_FLASH_DEV_BASE_ADDRESS DT_OPENISA_RV32M1_FTFE_40023000_BASE_ADDRESS
#define DT_FLASH_DEV_NAME DT_OPENISA_RV32M1_FTFE_40023000_LABEL #define DT_FLASH_DEV_NAME DT_OPENISA_RV32M1_FTFE_40023000_LABEL
#define DT_START_UP_ENTRY_OFFSET 0x80 #define DT_START_UP_ENTRY_OFFSET 0x80
#define CONFIG_ENTROPY_NAME DT_LABEL(DT_INST(0, openisa_rv32m1_trng))
#endif /* CONFIG_SOC_OPENISA_RV32M1_RISCV32 */ #endif /* CONFIG_SOC_OPENISA_RV32M1_RISCV32 */