[PATCH v2 0/4] Add k1 reset driver for bananapi-bpif3 platform.

[PATCH v2 0/4] Add k1 reset driver for bananapi-bpif3 platform.

[Huan Zhou]

Add device tree bindings and basic reset controller driver for the
BananaPi F3 board.This initial implementation supports the core reset 
functionality.

Changed in v2:
- fixed checkpatch error/warning.
- Links to v1: https://lore.kernel.org/u-boot/20250304-reset-k1-v1-0-dc9510ff1113@per1cycle.org/

Signed-off-by: Huan Zhou <me@per1cycle.org>
---
Huan Zhou (4):
      riscv: dt-binding: k1: Add reset driver binding definition.
      riscv: reset: k1: Add reset driver
      riscv: dts: k1: add reset controller node in device tree
      Add reset config options for k1

 arch/riscv/cpu/k1/Kconfig                     |   1 +
 arch/riscv/dts/k1.dtsi                        |  15 +
 configs/bananapi-f3_defconfig                 |   1 +
 drivers/reset/Kconfig                         |   7 +
 drivers/reset/Makefile                        |   1 +
 drivers/reset/reset-spacemit-k1.c             | 548 ++++++++++++++++++++++++++
 include/dt-bindings/reset/spacemit-k1-reset.h | 118 ++++++
 7 files changed, 691 insertions(+)
---
base-commit: cf6354ab23bfc3337b1087d243e6be4af48abe84
change-id: 20250308-reset-k1-773cd93f5337

Best regards,
-- 
Huan Zhou <me@per1cycle.org>

[PATCH v2 1/4] riscv: dt-binding: k1: Add reset driver binding definition.

[Huan Zhou]

Add dt-binding for reset driver.

Signed-off-by: Huan Zhou <me@per1cycle.org>
---
 include/dt-bindings/reset/spacemit-k1-reset.h | 118 ++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)

diff --git a/include/dt-bindings/reset/spacemit-k1-reset.h b/include/dt-bindings/reset/spacemit-k1-reset.h
new file mode 100644
index 0000000000000000000000000000000000000000..74db58b27ef875aa2cfe99bd28ed959116b46536
--- /dev/null
+++ b/include/dt-bindings/reset/spacemit-k1-reset.h
@@ -0,0 +1,118 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2022 Spacemit Inc.
+ * Copyright (C) 2025 Huan Zhou <pericycle.cc@gmail.com>
+ */
+
+#ifndef __DT_BINDINGS_RESET_SAPCEMIT_K1_H__
+#define __DT_BINDINGS_RESET_SAPCEMIT_K1_H__
+/* APBC */
+#define	RESET_UART1   1
+#define	RESET_UART2   2
+#define	RESET_GPIO    3
+#define	RESET_PWM0    4
+#define	RESET_PWM1    5
+#define	RESET_PWM2    6
+#define	RESET_PWM3    7
+#define	RESET_PWM4    8
+#define	RESET_PWM5    9
+#define	RESET_PWM6    10
+#define	RESET_PWM7    11
+#define	RESET_PWM8    12
+#define	RESET_PWM9    13
+#define	RESET_PWM10   14
+#define	RESET_PWM11   15
+#define	RESET_PWM12   16
+#define	RESET_PWM13   17
+#define	RESET_PWM14   18
+#define	RESET_PWM15   19
+#define	RESET_PWM16   20
+#define	RESET_PWM17   21
+#define	RESET_PWM18   22
+#define	RESET_PWM19   23
+#define	RESET_SSP3    24
+#define	RESET_UART3   25
+#define	RESET_RTC     26
+#define	RESET_TWSI0   27
+#define	RESET_TIMERS1 28
+#define	RESET_AIB     29
+#define	RESET_TIMERS2 30
+#define	RESET_ONEWIRE 31
+#define	RESET_SSPA0   32
+#define	RESET_SSPA1   33
+#define	RESET_DRO     34
+#define	RESET_IR      35
+#define	RESET_TWSI1   36
+#define	RESET_TSEN    37
+#define	RESET_TWSI2   38
+#define	RESET_TWSI4   39
+#define	RESET_TWSI5   40
+#define	RESET_TWSI6   41
+#define	RESET_TWSI7   42
+#define	RESET_TWSI8   43
+#define	RESET_IPC_AP2AUD  44
+#define	RESET_UART4   45
+#define	RESET_UART5   46
+#define	RESET_UART6   47
+#define	RESET_UART7   48
+#define	RESET_UART8   49
+#define	RESET_UART9   50
+#define	RESET_CAN0    51
+
+/* MPMU */
+#define	RESET_WDT     52
+
+/* APMU */
+#define	RESET_JPG        53
+#define	RESET_CSI        54
+#define	RESET_CCIC2_PHY  55
+#define	RESET_CCIC3_PHY  56
+#define	RESET_ISP        57
+#define	RESET_ISP_AHB    58
+#define	RESET_ISP_CI     59
+#define	RESET_ISP_CPP    60
+#define	RESET_LCD        61
+#define	RESET_DSI_ESC    62
+#define	RESET_V2D        63
+#define	RESET_MIPI       64
+#define	RESET_LCD_SPI    65
+#define	RESET_LCD_SPI_BUS  66
+#define	RESET_LCD_SPI_HBUS 67
+#define	RESET_LCD_MCLK     68
+#define	RESET_CCIC_4X      69
+#define	RESET_CCIC1_PHY    70
+#define	RESET_SDH_AXI      71
+#define	RESET_SDH0         72
+#define	RESET_SDH1         73
+#define	RESET_USB_AXI      74
+#define	RESET_USBP1_AXI    75
+#define	RESET_USB3_0       76
+#define	RESET_QSPI         77
+#define	RESET_QSPI_BUS     78
+#define	RESET_DMA          79
+#define	RESET_AES          80
+#define	RESET_VPU          81
+#define	RESET_GPU          82
+#define	RESET_SDH2         83
+#define	RESET_MC           84
+#define	RESET_EM_AXI       85
+#define	RESET_EM           86
+#define	RESET_AUDIO_SYS    87
+#define	RESET_HDMI         88
+#define	RESET_PCIE0        89
+#define	RESET_PCIE1        90
+#define	RESET_PCIE2        91
+#define	RESET_EMAC0        92
+#define	RESET_EMAC1        93
+
+/* APBC2 */
+#define	RESET_SEC_UART1    94
+#define	RESET_SEC_SSP2     95
+#define	RESET_SEC_TWSI3    96
+#define	RESET_SEC_RTC      97
+#define	RESET_SEC_TIMERS0  98
+#define	RESET_SEC_KPC      99
+#define	RESET_SEC_GPIO     100
+#define	RESET_NUMBER       101
+
+#endif

-- 
2.39.5

[PATCH v2 2/4] riscv: reset: k1: Add reset driver

[Huan Zhou]

Add spacemit reset driver.

Signed-off-by: Huan Zhou <me@per1cycle.org>
---
 drivers/reset/Kconfig             |   7 +
 drivers/reset/Makefile            |   1 +
 drivers/reset/reset-spacemit-k1.c | 548 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 556 insertions(+)

diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index fe5c1214f57a8b4d6f21b3a765bff813712ae3ff..9ee14a74211a5f1c23a35473a41044f7f2ebe61a 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -235,4 +235,11 @@ config RESET_AT91
 	  This enables the Reset Controller driver support for Microchip/Atmel
 	  SoCs. Mainly used to expose assert/deassert methods to other drivers
 	  that require it.
+
+config RESET_SPACEMIT_K1
+	bool "Support for SPACEMIT's K1 Reset driver"
+	depends on DM_RESET
+	help
+	  Support for SPACEMIT's K1 Reset system. Basic Assert/Deassert
+	  is supported.
 endmenu
diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile
index d99a78c9828b7f870acff8de75ebdcff59edc137..a69432bad2fb5980012e6fcc094a3ed669d9a378 100644
--- a/drivers/reset/Makefile
+++ b/drivers/reset/Makefile
@@ -33,3 +33,4 @@ obj-$(CONFIG_RESET_ZYNQMP) += reset-zynqmp.o
 obj-$(CONFIG_RESET_DRA7) += reset-dra7.o
 obj-$(CONFIG_RESET_AT91) += reset-at91.o
 obj-$(CONFIG_$(PHASE_)RESET_JH7110) += reset-jh7110.o
+obj-$(CONFIG_RESET_SPACEMIT_K1) += reset-spacemit-k1.o
\ No newline at end of file
diff --git a/drivers/reset/reset-spacemit-k1.c b/drivers/reset/reset-spacemit-k1.c
new file mode 100644
index 0000000000000000000000000000000000000000..613e002fc4f666c3312c57f9a28fc72add6461ca
--- /dev/null
+++ b/drivers/reset/reset-spacemit-k1.c
@@ -0,0 +1,548 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2022 Spacemit Inc.
+ * Copyright (C) 2025 Huan Zhou <pericycle.cc@gmail.com>
+ */
+
+#include <asm/io.h>
+#include <config.h>
+#include <dm.h>
+#include <dm/device_compat.h>
+#include <dm/device-internal.h>
+#include <dm/lists.h>
+#include <dt-bindings/reset/spacemit-k1-reset.h>
+#include <linux/bitops.h>
+#include <reset-uclass.h>
+
+/* APBC register offset */
+#define APBC_UART1_CLK_RST      0x0
+#define APBC_UART2_CLK_RST      0x4
+#define APBC_GPIO_CLK_RST       0x8
+#define APBC_PWM0_CLK_RST       0xc
+#define APBC_PWM1_CLK_RST       0x10
+#define APBC_PWM2_CLK_RST       0x14
+#define APBC_PWM3_CLK_RST       0x18
+#define APBC_TWSI8_CLK_RST      0x20
+#define APBC_UART3_CLK_RST      0x24
+#define APBC_RTC_CLK_RST        0x28
+#define APBC_TWSI0_CLK_RST      0x2c
+#define APBC_TWSI1_CLK_RST      0x30
+#define APBC_TIMERS1_CLK_RST    0x34
+#define APBC_TWSI2_CLK_RST      0x38
+#define APBC_AIB_CLK_RST        0x3c
+#define APBC_TWSI4_CLK_RST      0x40
+#define APBC_TIMERS2_CLK_RST    0x44
+#define APBC_ONEWIRE_CLK_RST    0x48
+#define APBC_TWSI5_CLK_RST      0x4c
+#define APBC_DRO_CLK_RST        0x58
+#define APBC_IR_CLK_RST         0x5c
+#define APBC_TWSI6_CLK_RST      0x60
+#define APBC_TWSI7_CLK_RST      0x68
+#define APBC_TSEN_CLK_RST       0x6c
+
+#define APBC_UART4_CLK_RST      0x70
+#define APBC_UART5_CLK_RST      0x74
+#define APBC_UART6_CLK_RST      0x78
+#define APBC_SSP3_CLK_RST       0x7c
+
+#define APBC_SSPA0_CLK_RST      0x80
+#define APBC_SSPA1_CLK_RST      0x84
+
+#define APBC_IPC_AP2AUD_CLK_RST 0x90
+#define APBC_UART7_CLK_RST      0x94
+#define APBC_UART8_CLK_RST      0x98
+#define APBC_UART9_CLK_RST      0x9c
+
+#define APBC_CAN0_CLK_RST       0xa0
+#define APBC_PWM4_CLK_RST       0xa8
+#define APBC_PWM5_CLK_RST       0xac
+#define APBC_PWM6_CLK_RST       0xb0
+#define APBC_PWM7_CLK_RST       0xb4
+#define APBC_PWM8_CLK_RST       0xb8
+#define APBC_PWM9_CLK_RST       0xbc
+#define APBC_PWM10_CLK_RST      0xc0
+#define APBC_PWM11_CLK_RST      0xc4
+#define APBC_PWM12_CLK_RST      0xc8
+#define APBC_PWM13_CLK_RST      0xcc
+#define APBC_PWM14_CLK_RST      0xd0
+#define APBC_PWM15_CLK_RST      0xd4
+#define APBC_PWM16_CLK_RST      0xd8
+#define APBC_PWM17_CLK_RST      0xdc
+#define APBC_PWM18_CLK_RST      0xe0
+#define APBC_PWM19_CLK_RST      0xe4
+/* end of APBC register offset */
+
+/* MPMU register offset */
+#define MPMU_WDTPCR     0x200
+/* end of MPMU register offset */
+
+/* APMU register offset */
+#define APMU_JPG_CLK_RES_CTRL       0x20
+#define APMU_CSI_CCIC2_CLK_RES_CTRL 0x24
+#define APMU_ISP_CLK_RES_CTRL       0x38
+#define APMU_LCD_CLK_RES_CTRL1      0x44
+#define APMU_LCD_SPI_CLK_RES_CTRL   0x48
+#define APMU_LCD_CLK_RES_CTRL2      0x4c
+#define APMU_CCIC_CLK_RES_CTRL      0x50
+#define APMU_SDH0_CLK_RES_CTRL      0x54
+#define APMU_SDH1_CLK_RES_CTRL      0x58
+#define APMU_USB_CLK_RES_CTRL       0x5c
+#define APMU_QSPI_CLK_RES_CTRL      0x60
+#define APMU_USB_CLK_RES_CTRL       0x5c
+#define APMU_DMA_CLK_RES_CTRL       0x64
+#define APMU_AES_CLK_RES_CTRL       0x68
+#define APMU_VPU_CLK_RES_CTRL       0xa4
+#define APMU_GPU_CLK_RES_CTRL       0xcc
+#define APMU_SDH2_CLK_RES_CTRL      0xe0
+#define APMU_PMUA_MC_CTRL           0xe8
+#define APMU_PMU_CC2_AP             0x100
+#define APMU_PMUA_EM_CLK_RES_CTRL   0x104
+
+#define APMU_AUDIO_CLK_RES_CTRL     0x14c
+#define APMU_HDMI_CLK_RES_CTRL      0x1B8
+
+#define APMU_PCIE_CLK_RES_CTRL_0    0x3cc
+#define APMU_PCIE_CLK_RES_CTRL_1    0x3d4
+#define APMU_PCIE_CLK_RES_CTRL_2    0x3dc
+
+#define APMU_EMAC0_CLK_RES_CTRL     0x3e4
+#define APMU_EMAC1_CLK_RES_CTRL     0x3ec
+/* end of APMU register offset */
+
+/* APBC2 register offset */
+#define APBC2_UART1_CLK_RST		0x00
+#define APBC2_SSP2_CLK_RST		0x04
+#define APBC2_TWSI3_CLK_RST		0x08
+#define APBC2_RTC_CLK_RST		0x0c
+#define APBC2_TIMERS0_CLK_RST	0x10
+#define APBC2_KPC_CLK_RST		0x14
+#define APBC2_GPIO_CLK_RST		0x1c
+/* end of APBC2 register offset */
+
+enum spacemit_reset_base_type {
+	RST_BASE_TYPE_MPMU       = 0,
+	RST_BASE_TYPE_APMU       = 1,
+	RST_BASE_TYPE_APBC       = 2,
+	RST_BASE_TYPE_APBS       = 3,
+	RST_BASE_TYPE_CIU        = 4,
+	RST_BASE_TYPE_DCIU       = 5,
+	RST_BASE_TYPE_DDRC       = 6,
+	RST_BASE_TYPE_AUDC       = 7,
+	RST_BASE_TYPE_APBC2      = 8,
+};
+
+struct spacemit_reset_signal {
+	u32 offset;
+	u32 mask;
+	u32 deassert_val;
+	u32 assert_val;
+	enum spacemit_reset_base_type type;
+};
+
+struct spacemit_reset_base {
+	void __iomem *mpmu_base;
+	void __iomem *apmu_base;
+	void __iomem *apbc_base;
+	void __iomem *apbs_base;
+	void __iomem *ciu_base;
+	void __iomem *dciu_base;
+	void __iomem *ddrc_base;
+	void __iomem *audio_ctrl_base;
+	void __iomem *apbc2_base;
+};
+
+struct spacemit_reset {
+	struct spacemit_reset_base io_base;
+	const struct spacemit_reset_signal *signals;
+};
+
+enum {
+	RESET_TWSI6_SPL = 0,
+	RESET_TWSI8_SPL,
+	RESET_SDH_AXI_SPL,
+	RESET_SDH0_SPL,
+	RESET_USB_AXI_SPL,
+	RESET_USBP1_AXI_SPL,
+	RESET_USB3_0_SPL,
+	RESET_QSPI_SPL,
+	RESET_QSPI_BUS_SPL,
+	RESET_AES_SPL,
+	RESET_SDH2_SPL,
+	RESET_NUMBER_SPL
+};
+
+static const struct spacemit_reset_signal
+	k1_reset_signals[RESET_NUMBER] = {
+	[RESET_UART1]   = { APBC_UART1_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_UART2]   = { APBC_UART2_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_GPIO]    = { APBC_GPIO_CLK_RST, BIT(2), 0,
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM0]    = { APBC_PWM0_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM1]    = { APBC_PWM1_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM2]    = { APBC_PWM2_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM3]    = { APBC_PWM3_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM4]    = { APBC_PWM4_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM5]    = { APBC_PWM5_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM6]    = { APBC_PWM6_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM7]    = { APBC_PWM7_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM8]    = { APBC_PWM8_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM9]    = { APBC_PWM9_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM10]   = { APBC_PWM10_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM11]   = { APBC_PWM11_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM12]   = { APBC_PWM12_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM13]   = { APBC_PWM13_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM14]   = { APBC_PWM14_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM15]   = { APBC_PWM15_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM16]   = { APBC_PWM16_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM17]   = { APBC_PWM17_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM18]   = { APBC_PWM18_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_PWM19]   = { APBC_PWM19_CLK_RST,
+			BIT(2) | BIT(0),
+			BIT(0),
+			BIT(2),
+			RST_BASE_TYPE_APBC },
+	[RESET_SSP3]    = { APBC_SSP3_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_UART3]   = { APBC_UART3_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_RTC]     = { APBC_RTC_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_TWSI0]   = { APBC_TWSI0_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_TIMERS1] = { APBC_TIMERS1_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_AIB]     = { APBC_AIB_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_TIMERS2] = { APBC_TIMERS2_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_ONEWIRE] = { APBC_ONEWIRE_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_SSPA0]   = { APBC_SSPA0_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_SSPA1]   = { APBC_SSPA1_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_DRO]     = { APBC_DRO_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_IR]      = { APBC_IR_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_TWSI1]   = { APBC_TWSI1_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_TSEN]    = { APBC_TSEN_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_TWSI2]   = { APBC_TWSI2_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_TWSI4]   = { APBC_TWSI4_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_TWSI5]   = { APBC_TWSI5_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_TWSI6]   = { APBC_TWSI6_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_TWSI7]   = { APBC_TWSI7_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_TWSI8]   = { APBC_TWSI8_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_IPC_AP2AUD]   = { APBC_IPC_AP2AUD_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_UART4]   = { APBC_UART4_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_UART5]   = { APBC_UART5_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_UART6]   = { APBC_UART6_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_UART7]   = { APBC_UART7_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_UART8]   = { APBC_UART8_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_UART9]   = { APBC_UART9_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	[RESET_CAN0]    = { APBC_CAN0_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC },
+	/* MPMU */
+	[RESET_WDT]     = { MPMU_WDTPCR, BIT(2), 0, BIT(2), RST_BASE_TYPE_MPMU },
+	/* APMU */
+	[RESET_JPG]     = { APMU_JPG_CLK_RES_CTRL, BIT(0), BIT(0), 0, RST_BASE_TYPE_APMU },
+	[RESET_CSI]     = { APMU_CSI_CCIC2_CLK_RES_CTRL, BIT(1), BIT(1), 0, RST_BASE_TYPE_APMU },
+	[RESET_CCIC2_PHY]   = { APMU_CSI_CCIC2_CLK_RES_CTRL,
+				BIT(2),
+				BIT(2),
+				0,
+				RST_BASE_TYPE_APMU },
+	[RESET_CCIC3_PHY]   = { APMU_CSI_CCIC2_CLK_RES_CTRL,
+				BIT(29),
+				BIT(29),
+				0,
+				RST_BASE_TYPE_APMU },
+	[RESET_ISP]     = { APMU_ISP_CLK_RES_CTRL, BIT(0), BIT(0), 0, RST_BASE_TYPE_APMU },
+	[RESET_ISP_AHB] = { APMU_ISP_CLK_RES_CTRL, BIT(3), BIT(3), 0, RST_BASE_TYPE_APMU },
+	[RESET_ISP_CI]  = { APMU_ISP_CLK_RES_CTRL, BIT(16), BIT(16), 0, RST_BASE_TYPE_APMU },
+	[RESET_ISP_CPP] = { APMU_ISP_CLK_RES_CTRL, BIT(27), BIT(27), 0, RST_BASE_TYPE_APMU },
+	[RESET_LCD]     = { APMU_LCD_CLK_RES_CTRL1, BIT(4), BIT(4), 0, RST_BASE_TYPE_APMU },
+	[RESET_DSI_ESC] = { APMU_LCD_CLK_RES_CTRL1, BIT(3), BIT(3), 0, RST_BASE_TYPE_APMU },
+	[RESET_V2D]     = { APMU_LCD_CLK_RES_CTRL1, BIT(27), BIT(27), 0, RST_BASE_TYPE_APMU },
+	[RESET_MIPI]    = { APMU_LCD_CLK_RES_CTRL1, BIT(15), BIT(15), 0, RST_BASE_TYPE_APMU },
+	[RESET_LCD_SPI] = { APMU_LCD_SPI_CLK_RES_CTRL, BIT(0), BIT(0), 0, RST_BASE_TYPE_APMU },
+	[RESET_LCD_SPI_BUS]     = { APMU_LCD_SPI_CLK_RES_CTRL,
+				BIT(4),
+				BIT(4),
+				0,
+				RST_BASE_TYPE_APMU },
+	[RESET_LCD_SPI_HBUS]    = { APMU_LCD_SPI_CLK_RES_CTRL,
+				BIT(2),
+				BIT(2),
+				0,
+				RST_BASE_TYPE_APMU },
+	[RESET_LCD_MCLK]    = { APMU_LCD_CLK_RES_CTRL2, BIT(9), BIT(9), 0, RST_BASE_TYPE_APMU },
+	[RESET_CCIC_4X]     = { APMU_CCIC_CLK_RES_CTRL, BIT(1), BIT(1), 0, RST_BASE_TYPE_APMU },
+	[RESET_CCIC1_PHY]   = { APMU_CCIC_CLK_RES_CTRL, BIT(2), BIT(2), 0, RST_BASE_TYPE_APMU },
+	[RESET_SDH_AXI]     = { APMU_SDH0_CLK_RES_CTRL, BIT(0), BIT(0), 0, RST_BASE_TYPE_APMU },
+	[RESET_SDH0]      = { APMU_SDH0_CLK_RES_CTRL, BIT(1), BIT(1), 0, RST_BASE_TYPE_APMU },
+	[RESET_SDH1]	  = { APMU_SDH1_CLK_RES_CTRL, BIT(1), BIT(1), 0, RST_BASE_TYPE_APMU },
+	[RESET_USB_AXI]	  = { APMU_USB_CLK_RES_CTRL, BIT(0), BIT(0), 0, RST_BASE_TYPE_APMU },
+	[RESET_USBP1_AXI] = { APMU_USB_CLK_RES_CTRL, BIT(4), BIT(4), 0, RST_BASE_TYPE_APMU },
+	[RESET_USB3_0]	  = { APMU_USB_CLK_RES_CTRL,
+				BIT(9) | BIT(10) | BIT(11),
+				BIT(9) | BIT(10) | BIT(11),
+				0,
+				RST_BASE_TYPE_APMU },
+	[RESET_QSPI]  = { APMU_QSPI_CLK_RES_CTRL, BIT(1), BIT(1), 0, RST_BASE_TYPE_APMU },
+	[RESET_QSPI_BUS]  = { APMU_QSPI_CLK_RES_CTRL, BIT(0), BIT(0), 0, RST_BASE_TYPE_APMU },
+	[RESET_DMA]	 = { APMU_DMA_CLK_RES_CTRL, BIT(0), BIT(0), 0, RST_BASE_TYPE_APMU },
+	[RESET_AES]	 = { APMU_AES_CLK_RES_CTRL, BIT(4), BIT(4), 0, RST_BASE_TYPE_APMU },
+	[RESET_VPU]	 = { APMU_VPU_CLK_RES_CTRL, BIT(0), BIT(0), 0, RST_BASE_TYPE_APMU },
+	[RESET_GPU]	 = { APMU_GPU_CLK_RES_CTRL, BIT(1), BIT(1), 0, RST_BASE_TYPE_APMU },
+	[RESET_SDH2] = { APMU_SDH2_CLK_RES_CTRL, BIT(1), BIT(1), 0, RST_BASE_TYPE_APMU },
+	[RESET_MC]	 = { APMU_PMUA_MC_CTRL, BIT(0), BIT(0), 0, RST_BASE_TYPE_APMU },
+	[RESET_EM_AXI]	= { APMU_PMUA_EM_CLK_RES_CTRL, BIT(0), BIT(0), 0, RST_BASE_TYPE_APMU },
+	[RESET_EM]	= { APMU_PMUA_EM_CLK_RES_CTRL, BIT(1), BIT(1), 0, RST_BASE_TYPE_APMU },
+	[RESET_AUDIO_SYS] = { APMU_AUDIO_CLK_RES_CTRL,
+				BIT(0) | BIT(2) | BIT(3),
+				BIT(0) | BIT(2) | BIT(3),
+				0,
+				RST_BASE_TYPE_APMU },
+	[RESET_HDMI]	 = { APMU_HDMI_CLK_RES_CTRL, BIT(9), BIT(9), 0, RST_BASE_TYPE_APMU },
+	[RESET_PCIE0]	 = { APMU_PCIE_CLK_RES_CTRL_0,
+				BIT(3) | BIT(4) | BIT(5) | BIT(8),
+				BIT(3) | BIT(4) | BIT(5),
+				BIT(8),
+				RST_BASE_TYPE_APMU },
+	[RESET_PCIE1]	 = { APMU_PCIE_CLK_RES_CTRL_1,
+				BIT(3) | BIT(4) | BIT(5) | BIT(8),
+				BIT(3) | BIT(4) | BIT(5),
+				BIT(8),
+				RST_BASE_TYPE_APMU },
+	[RESET_PCIE2]	 = { APMU_PCIE_CLK_RES_CTRL_2, 0x138, 0x38, 0x100, RST_BASE_TYPE_APMU },
+	[RESET_EMAC0]	 = { APMU_EMAC0_CLK_RES_CTRL, BIT(1), BIT(1), 0, RST_BASE_TYPE_APMU },
+	[RESET_EMAC1]	 = { APMU_EMAC1_CLK_RES_CTRL, BIT(1), BIT(1), 0, RST_BASE_TYPE_APMU },
+	[RESET_SEC_UART1]	= { APBC2_UART1_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC2 },
+	[RESET_SEC_SSP2]	= { APBC2_SSP2_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC2 },
+	[RESET_SEC_TWSI3]	= { APBC2_TWSI3_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC2 },
+	[RESET_SEC_RTC]		= { APBC2_RTC_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC2 },
+	[RESET_SEC_TIMERS0]	= { APBC2_TIMERS0_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC2 },
+	[RESET_SEC_KPC]		= { APBC2_KPC_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC2 },
+	[RESET_SEC_GPIO]	= { APBC2_GPIO_CLK_RST, BIT(2), 0, BIT(2), RST_BASE_TYPE_APBC2 },
+	};
+
+static u32 spacemit_reset_read(struct spacemit_reset *reset, u32 id)
+{
+	void __iomem *base;
+
+	switch (reset->signals[id].type) {
+	case RST_BASE_TYPE_APMU:
+		base = reset->io_base.apmu_base;
+		break;
+	case RST_BASE_TYPE_APBC:
+		base = reset->io_base.apbc_base;
+		break;
+	default:
+		base = reset->io_base.apbc_base;
+		break;
+	}
+
+	return readl(base + reset->signals[id].offset);
+}
+
+static void spacemit_reset_write(struct spacemit_reset *reset, u32 value, u32 id)
+{
+	void __iomem *base;
+
+	switch (reset->signals[id].type) {
+	case RST_BASE_TYPE_APMU:
+		base = reset->io_base.apmu_base;
+		break;
+	case RST_BASE_TYPE_APBC:
+		base = reset->io_base.apbc_base;
+		break;
+	default:
+		base = reset->io_base.apbc_base;
+		break;
+	}
+
+	writel(value, base + reset->signals[id].offset);
+}
+
+static void spacemit_reset_set(struct reset_ctl *rst, u32 id, bool assert)
+{
+	u32 value;
+	struct spacemit_reset *reset = dev_get_priv(rst->dev);
+
+	value = spacemit_reset_read(reset, id);
+
+	if (assert) {
+		value &= ~reset->signals[id].mask;
+		value |= reset->signals[id].assert_val;
+	} else {
+		value &= ~reset->signals[id].mask;
+		value |= reset->signals[id].deassert_val;
+	}
+
+	spacemit_reset_write(reset, value, id);
+}
+
+static int spacemit_reset_update(struct reset_ctl *rst, bool assert)
+{
+	if (rst->id < RESET_UART1 || rst->id >= RESET_NUMBER)
+		return 0;
+
+	/* can not write to twsi8 */
+	if (rst->id == RESET_TWSI8)
+		return 0;
+
+	spacemit_reset_set(rst, rst->id, assert);
+	return 0;
+}
+
+static int spacemit_reset_assert(struct reset_ctl *rst)
+{
+	return spacemit_reset_update(rst, true);
+}
+
+static int spacemit_reset_deassert(struct reset_ctl *rst)
+{
+	return spacemit_reset_update(rst, false);
+}
+
+static int spacemit_k1_reset_probe(struct udevice *dev)
+{
+	struct spacemit_reset *reset = dev_get_priv(dev);
+
+	reset->io_base.mpmu_base = (void *)dev_remap_addr_index(dev, 0);
+	if (!reset->io_base.mpmu_base) {
+		pr_err("failed to map mpmu registers\n");
+		goto out;
+	}
+
+	reset->io_base.apmu_base = (void *)dev_remap_addr_index(dev, 1);
+	if (!reset->io_base.apmu_base) {
+		pr_err("failed to map apmu registers\n");
+		goto out;
+	}
+
+	reset->io_base.apbc_base = (void *)dev_remap_addr_index(dev, 2);
+	if (!reset->io_base.apbc_base) {
+		pr_err("failed to map apbc registers\n");
+		goto out;
+	}
+
+	reset->io_base.apbs_base = (void *)dev_remap_addr_index(dev, 3);
+	if (!reset->io_base.apbs_base) {
+		pr_err("failed to map apbs registers\n");
+		goto out;
+	}
+
+	reset->io_base.ciu_base = (void *)dev_remap_addr_index(dev, 4);
+	if (!reset->io_base.ciu_base) {
+		pr_err("failed to map ciu registers\n");
+		goto out;
+	}
+
+	reset->io_base.dciu_base = (void *)dev_remap_addr_index(dev, 5);
+	if (!reset->io_base.dciu_base) {
+		pr_err("failed to map dragon ciu registers\n");
+		goto out;
+	}
+
+	reset->io_base.ddrc_base = (void *)dev_remap_addr_index(dev, 6);
+	if (!reset->io_base.ddrc_base) {
+		pr_err("failed to map ddrc registers\n");
+		goto out;
+	}
+
+	reset->io_base.apbc2_base = (void *)dev_remap_addr_index(dev, 7);
+	if (!reset->io_base.apbc2_base) {
+		pr_err("failed to map apbc2 registers\n");
+		goto out;
+	}
+
+	reset->signals = k1_reset_signals;
+
+out:
+	return 0;
+}
+
+const struct reset_ops k1_reset_ops = {
+	.rst_assert = spacemit_reset_assert,
+	.rst_deassert = spacemit_reset_deassert,
+};
+
+static const struct udevice_id k1_reset_ids[] = {
+	{ .compatible = "spacemit,k1-reset", },
+	{},
+};
+
+U_BOOT_DRIVER(k1_reset) = {
+	.name		= "spacemit,k1-reset",
+	.id		= UCLASS_RESET,
+	.ops		= &k1_reset_ops,
+	.of_match	= k1_reset_ids,
+	.probe		= spacemit_k1_reset_probe,
+	.priv_auto	= sizeof(struct spacemit_reset),
+};

-- 
2.39.5

[PATCH v2 3/4] riscv: dts: k1: add reset controller node in device tree

[Huan Zhou]

Add reset-controller in k1 device tree.

Signed-off-by: Huan Zhou <me@per1cycle.org>
---
 arch/riscv/dts/k1.dtsi | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/riscv/dts/k1.dtsi b/arch/riscv/dts/k1.dtsi
index 514be453dbaf6713cdf4ad5a5d653488297ebb83..b3e3f81d4dfa6e64dd4a00625280e43b014a6915 100644
--- a/arch/riscv/dts/k1.dtsi
+++ b/arch/riscv/dts/k1.dtsi
@@ -455,5 +455,20 @@
 			reg-io-width = <4>;
 			status = "reserved"; /* for TEE usage */
 		};
+
+		reset: reset-controller@d4050000 {
+			compatible = "spacemit,k1-reset";
+			reg = <0x0 0xd4050000 0x0 0x209c>,
+				<0x0 0xd4282800 0x0 0x400>,
+				<0x0 0xd4015000 0x0 0x1000>,
+				<0x0 0xd4090000 0x0 0x1000>,
+				<0x0 0xd4282c00 0x0 0x400>,
+				<0x0 0xd8440000 0x0 0x98>,
+				<0x0 0xc0000000 0x0 0x4280>,
+				<0x0 0xf0610000 0x0 0x20>;
+			reg-names = "mpmu", "apmu", "apbc", "apbs", "ciu", "dciu", "ddrc", "apbc2";
+			#reset-cells = <1>;
+			status = "disabled";
+		};
 	};
 };
\ No newline at end of file

-- 
2.39.5

[PATCH v2 4/4] Add reset config options for k1

[Huan Zhou]

Add RESET_SPACEMIT_K1 option in config

Signed-off-by: Huan Zhou <me@per1cycle.org>
---
 arch/riscv/cpu/k1/Kconfig     | 1 +
 configs/bananapi-f3_defconfig | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/riscv/cpu/k1/Kconfig b/arch/riscv/cpu/k1/Kconfig
index d9cd8dce96426bb4cbe9ff38385a4c66116fe341..14201df80f2c0bf304225ef6d8dc8e72ff508815 100644
--- a/arch/riscv/cpu/k1/Kconfig
+++ b/arch/riscv/cpu/k1/Kconfig
@@ -13,6 +13,7 @@ config SPACEMIT_K1
 	imply RISCV_ACLINT if RISCV_MMODE
 	imply SPL_RISCV_ACLINT if SPL_RISCV_MMODE
 	imply CMD_CPU
+	imply DM_RESET
 	imply SPL_CPU
 	imply SPL_OPENSBI
 	imply SPL_LOAD_FIT
diff --git a/configs/bananapi-f3_defconfig b/configs/bananapi-f3_defconfig
index 0f12db3db848badda1fc7192aeb0190ac22a269d..7483f128baea9d8971efc9ed166aa042ec32d908 100644
--- a/configs/bananapi-f3_defconfig
+++ b/configs/bananapi-f3_defconfig
@@ -18,3 +18,4 @@ CONFIG_HUSH_PARSER=y
 CONFIG_ENV_OVERWRITE=y
 CONFIG_SYS_NS16550=y
 CONFIG_SYS_NS16550_MEM32=y
+CONFIG_RESET_SPACEMIT_K1=y

-- 
2.39.5

Re: [PATCH v2 1/4] riscv: dt-binding: k1: Add reset driver binding definition.

[Leo Liang]

On Tue, Mar 11, 2025 at 09:38:48AM +0800, Huan Zhou wrote:
> Add dt-binding for reset driver.
> 
> Signed-off-by: Huan Zhou <me@per1cycle.org>
> ---
>  include/dt-bindings/reset/spacemit-k1-reset.h | 118 ++++++++++++++++++++++++++
>  1 file changed, 118 insertions(+)

Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>

Re: [PATCH v2 2/4] riscv: reset: k1: Add reset driver

[Leo Liang]

On Tue, Mar 11, 2025 at 09:38:49AM +0800, Huan Zhou wrote:
> Add spacemit reset driver.
> 
> Signed-off-by: Huan Zhou <me@per1cycle.org>
> ---
>  drivers/reset/Kconfig             |   7 +
>  drivers/reset/Makefile            |   1 +
>  drivers/reset/reset-spacemit-k1.c | 548 ++++++++++++++++++++++++++++++++++++++
>  3 files changed, 556 insertions(+)

Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>

Re: [PATCH v2 3/4] riscv: dts: k1: add reset controller node in device tree

[Leo Liang]

On Tue, Mar 11, 2025 at 09:38:50AM +0800, Huan Zhou wrote:
> Add reset-controller in k1 device tree.
> 
> Signed-off-by: Huan Zhou <me@per1cycle.org>
> ---
>  arch/riscv/dts/k1.dtsi | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)

Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>

Re: [PATCH v2 4/4] Add reset config options for k1

[Leo Liang]

On Tue, Mar 11, 2025 at 09:38:51AM +0800, Huan Zhou wrote:
> Add RESET_SPACEMIT_K1 option in config
> 
> Signed-off-by: Huan Zhou <me@per1cycle.org>
> ---
>  arch/riscv/cpu/k1/Kconfig     | 1 +
>  configs/bananapi-f3_defconfig | 1 +
>  2 files changed, 2 insertions(+)

Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>