105 lines
3.4 KiB
Diff
105 lines
3.4 KiB
Diff
From 039f475da3e1e140ef5dd0c6d8dfb0676af0d39e Mon Sep 17 00:00:00 2001
|
|
From: Vincent Chen <vincent.chen@sifive.com>
|
|
Date: Wed, 3 May 2023 07:34:48 +0000
|
|
Subject: [PATCH 2/3] 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 13453300..5df01982 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 00000000..e1cc0231
|
|
--- /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 7c0beedc..f3a661a8 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);
|
|
--
|
|
2.40.1
|
|
|