diff options
Diffstat (limited to 'package/boot/uboot-sifiveu/patches/0002-board-sifive-spl-Initialized-the-PWM-setting-in-the-.patch')
| -rw-r--r-- | package/boot/uboot-sifiveu/patches/0002-board-sifive-spl-Initialized-the-PWM-setting-in-the-.patch | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/package/boot/uboot-sifiveu/patches/0002-board-sifive-spl-Initialized-the-PWM-setting-in-the-.patch b/package/boot/uboot-sifiveu/patches/0002-board-sifive-spl-Initialized-the-PWM-setting-in-the-.patch new file mode 100644 index 0000000000..27cda75326 --- /dev/null +++ b/package/boot/uboot-sifiveu/patches/0002-board-sifive-spl-Initialized-the-PWM-setting-in-the-.patch @@ -0,0 +1,104 @@ +From 725595e667cc4423347c255da8ca4c5b3aa0980a Mon Sep 17 00:00:00 2001 +From: Vincent Chen <vincent.chen@sifive.com> +Date: Mon, 15 Nov 2021 03:31:04 -0800 +Subject: [PATCH 2/8] board: sifive: spl: Initialized the PWM setting in the + SPL stage + +LEDs and multiple fans can be controlled by SPL. This patch ensures +that all fans have been enabled in the SPL stage. In addition, the +LED's color will be set to yellow. +--- + board/sifive/unmatched/Makefile | 1 + + board/sifive/unmatched/pwm.c | 57 +++++++++++++++++++++++++++++++++ + board/sifive/unmatched/spl.c | 2 ++ + 3 files changed, 60 insertions(+) + create mode 100644 board/sifive/unmatched/pwm.c + +diff --git a/board/sifive/unmatched/Makefile b/board/sifive/unmatched/Makefile +index 1345330089..5df01982e9 100644 +--- a/board/sifive/unmatched/Makefile ++++ b/board/sifive/unmatched/Makefile +@@ -9,3 +9,4 @@ obj-y += spl.o + else + obj-y += unmatched.o + endif ++obj-y += pwm.o +diff --git a/board/sifive/unmatched/pwm.c b/board/sifive/unmatched/pwm.c +new file mode 100644 +index 0000000000..e1cc02310a +--- /dev/null ++++ b/board/sifive/unmatched/pwm.c +@@ -0,0 +1,57 @@ ++// SPDX-License-Identifier: GPL-2.0+ ++/* ++ * Copyright (c) 2021, SiFive Inc ++ * ++ * Authors: ++ * Vincent Chen <vincent.chen@sifive.com> ++ * David Abdurachmanov <david.abdurachmanov@sifive.com> ++ */ ++ ++#include <linux/io.h> ++#include <asm/arch/eeprom.h> ++ ++struct pwm_sifive_regs { ++ unsigned int cfg; /* PWM configuration register */ ++ unsigned int pad0; /* Reserved */ ++ unsigned int cnt; /* PWM count register */ ++ unsigned int pad1; /* Reserved */ ++ unsigned int pwms; /* Scaled PWM count register */ ++ unsigned int pad2; /* Reserved */ ++ unsigned int pad3; /* Reserved */ ++ unsigned int pad4; /* Reserved */ ++ unsigned int cmp0; /* PWM 0 compare register */ ++ unsigned int cmp1; /* PWM 1 compare register */ ++ unsigned int cmp2; /* PWM 2 compare register */ ++ unsigned int cmp3; /* PWM 3 compare register */ ++}; ++ ++#define PWM0_BASE 0x10020000 ++#define PWM1_BASE 0x10021000 ++#define PWM_CFG_INIT 0x1000 ++#define PWM_CMP_ENABLE_VAL 0x0 ++#define PWM_CMP_DISABLE_VAL 0xffff ++ ++void pwm_device_init(void) ++{ ++ struct pwm_sifive_regs *pwm0, *pwm1; ++ pwm0 = (struct pwm_sifive_regs *)PWM0_BASE; ++ pwm1 = (struct pwm_sifive_regs *)PWM1_BASE; ++ writel(PWM_CMP_DISABLE_VAL, (void *)&pwm0->cmp0); ++ /* Set the 3-color PWM LEDs to yellow in SPL */ ++ writel(PWM_CMP_ENABLE_VAL, (void *)&pwm0->cmp1); ++ writel(PWM_CMP_ENABLE_VAL, (void *)&pwm0->cmp2); ++ writel(PWM_CMP_DISABLE_VAL, (void *)&pwm0->cmp3); ++ writel(PWM_CFG_INIT, (void *)&pwm0->cfg); ++ ++ writel(PWM_CMP_DISABLE_VAL, (void *)&pwm0->cmp3); ++ /* Turn on all the fans, (J21), (J23) and (J24), on the unmatched board */ ++ /* The SoC fan(J21) on the rev3 board cannot be controled by PWM_COMP0, ++ so here sets the initial value of PWM_COMP0 as DISABLE */ ++ if (get_pcb_revision_from_eeprom() == PCB_REVISION_REV3) ++ writel(PWM_CMP_DISABLE_VAL, (void *)&pwm1->cmp1); ++ else ++ writel(PWM_CMP_ENABLE_VAL, (void *)&pwm1->cmp1); ++ writel(PWM_CMP_ENABLE_VAL, (void *)&pwm1->cmp2); ++ writel(PWM_CMP_ENABLE_VAL, (void *)&pwm1->cmp3); ++ writel(PWM_CFG_INIT, (void *)&pwm1->cfg); ++} +diff --git a/board/sifive/unmatched/spl.c b/board/sifive/unmatched/spl.c +index 7c0beedc08..f3a661a81e 100644 +--- a/board/sifive/unmatched/spl.c ++++ b/board/sifive/unmatched/spl.c +@@ -90,6 +90,8 @@ int spl_board_init_f(void) + goto end; + } + ++ pwm_device_init(); ++ + ret = spl_gemgxl_init(); + if (ret) { + debug("Gigabit ethernet PHY (VSC8541) init failed: %d\n", ret); +-- +2.27.0 + |