From: Peng Fan <[email protected]> On the imx8ulp A1 SoC, the ELE RNG needs to be manually started.
Signed-off-by: Clement Faure <[email protected]> Signed-off-by: Peng Fan <[email protected]> --- arch/arm/include/asm/mach-imx/ele_api.h | 1 + board/freescale/imx8ulp_evk/spl.c | 10 ++++++++++ drivers/misc/imx_ele/ele_api.c | 25 +++++++++++++++++++++++++ 3 files changed, 36 insertions(+) diff --git a/arch/arm/include/asm/mach-imx/ele_api.h b/arch/arm/include/asm/mach-imx/ele_api.h index 053a23f030b..cfd4ecebb62 100644 --- a/arch/arm/include/asm/mach-imx/ele_api.h +++ b/arch/arm/include/asm/mach-imx/ele_api.h @@ -149,4 +149,5 @@ int ele_get_fw_status(u32 *status, u32 *response); int ele_release_m33_trout(void); int ele_write_secure_fuse(ulong signed_msg_blk, u32 *response); int ele_return_lifecycle_update(ulong signed_msg_blk, u32 *response); +int ele_start_rng(void); #endif diff --git a/board/freescale/imx8ulp_evk/spl.c b/board/freescale/imx8ulp_evk/spl.c index b7c6ff092b1..66d0f68cc62 100644 --- a/board/freescale/imx8ulp_evk/spl.c +++ b/board/freescale/imx8ulp_evk/spl.c @@ -123,6 +123,16 @@ void spl_board_init(void) ret = ele_release_caam(0x7, &res); if (ret) printf("ele release caam failed %d, 0x%x\n", ret, res); + + /* + * RNG start only available on the A1 soc revision. + * Check some JTAG register for the SoC revision. + */ + if (!is_soc_rev(CHIP_REV_1_0)) { + ret = ele_start_rng(); + if (ret) + printf("Fail to start RNG: %d\n", ret); + } } void board_init_f(ulong dummy) diff --git a/drivers/misc/imx_ele/ele_api.c b/drivers/misc/imx_ele/ele_api.c index 8a14cf6aa92..0c017734a49 100644 --- a/drivers/misc/imx_ele/ele_api.c +++ b/drivers/misc/imx_ele/ele_api.c @@ -503,6 +503,31 @@ int ele_get_events(u32 *events, u32 *events_cnt, u32 *response) return ret; } +int ele_start_rng(void) +{ + struct udevice *dev = gd->arch.ele_dev; + int size = sizeof(struct ele_msg); + struct ele_msg msg; + int ret; + + if (!dev) { + printf("ele dev is not initialized\n"); + return -ENODEV; + } + + msg.version = ELE_VERSION; + msg.tag = ELE_CMD_TAG; + msg.size = 1; + msg.command = ELE_START_RNG; + + ret = misc_call(dev, false, &msg, size, &msg, size); + if (ret) + printf("Error: %s: ret %d, response 0x%x\n", + __func__, ret, msg.data[0]); + + return ret; +} + int ele_write_secure_fuse(ulong signed_msg_blk, u32 *response) { struct udevice *dev = gd->arch.ele_dev; -- 2.40.0
