drivers/reset/stm32-reset.c

1 // SPDX-License-Identifier: GPL-2.0+
3  * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
10 #include <reset-uclass.h>
14 /* reset clear offset for STM32MP RCC */
33 	struct stm32_reset_priv *priv = dev_get_priv(reset_ctl->dev);  in stm32_reset_assert()
34 	int bank = (reset_ctl->id / BITS_PER_LONG) * 4;  in stm32_reset_assert()
35 	int offset = reset_ctl->id % BITS_PER_LONG;  in stm32_reset_assert()
37 	      reset_ctl->id, bank, offset);  in stm32_reset_assert()
39 	if (dev_get_driver_data(reset_ctl->dev) == STM32MP1)  in stm32_reset_assert()
40 		/* reset assert is done in rcc set register */  in stm32_reset_assert()
41 		writel(BIT(offset), priv->base + bank);  in stm32_reset_assert()
43 		setbits_le32(priv->base + bank, BIT(offset));  in stm32_reset_assert()
50 	struct stm32_reset_priv *priv = dev_get_priv(reset_ctl->dev);  in stm32_reset_deassert()
51 	int bank = (reset_ctl->id / BITS_PER_LONG) * 4;  in stm32_reset_deassert()
52 	int offset = reset_ctl->id % BITS_PER_LONG;  in stm32_reset_deassert()
54 	      reset_ctl->id, bank, offset);  in stm32_reset_deassert()
56 	if (dev_get_driver_data(reset_ctl->dev) == STM32MP1)  in stm32_reset_deassert()
57 		/* reset deassert is done in rcc clr register */  in stm32_reset_deassert()
58 		writel(BIT(offset), priv->base + bank + RCC_CL);  in stm32_reset_deassert()
60 		clrbits_le32(priv->base + bank, BIT(offset));  in stm32_reset_deassert()
76 	priv->base = dev_read_addr(dev);  in stm32_reset_probe()
77 	if (priv->base == FDT_ADDR_T_NONE) {  in stm32_reset_probe()
79 		priv->base = dev_read_addr(dev->parent);  in stm32_reset_probe()
80 		if (priv->base == FDT_ADDR_T_NONE)  in stm32_reset_probe()
81 			return -EINVAL;  in stm32_reset_probe()