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Subject[PATCH 3/3] reset: Add reset controller support for BM1880 SoC
Date
Add reset controller support for Bitmain BM1880 SoC reusing the
reset-simple driver. While we are at it, this driver has also been
modified to make use of the SPDX license identifier.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
drivers/reset/Kconfig | 3 ++-
drivers/reset/Makefile | 1 +
drivers/reset/reset-simple.c | 16 +++++++++++-----
3 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index 2c8c23db92fb..b25e8d139f0d 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -117,7 +117,7 @@ config RESET_QCOM_PDC

config RESET_SIMPLE
bool "Simple Reset Controller Driver" if COMPILE_TEST
- default ARCH_STM32 || ARCH_STRATIX10 || ARCH_SUNXI || ARCH_ZX || ARCH_ASPEED
+ default ARCH_STM32 || ARCH_STRATIX10 || ARCH_SUNXI || ARCH_ZX || ARCH_ASPEED || ARCH_BITMAIN
help
This enables a simple reset controller driver for reset lines that
that can be asserted and deasserted by toggling bits in a contiguous,
@@ -129,6 +129,7 @@ config RESET_SIMPLE
- RCC reset controller in STM32 MCUs
- Allwinner SoCs
- ZTE's zx2967 family
+ - Bitmain BM1880 SoC

config RESET_STM32MP157
bool "STM32MP157 Reset Driver" if COMPILE_TEST
diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile
index 61456b8f659c..b87968771166 100644
--- a/drivers/reset/Makefile
+++ b/drivers/reset/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_RESET_A10SR) += reset-a10sr.o
obj-$(CONFIG_RESET_ATH79) += reset-ath79.o
obj-$(CONFIG_RESET_AXS10X) += reset-axs10x.o
obj-$(CONFIG_RESET_BERLIN) += reset-berlin.o
+#obj-$(CONFIG_RESET_BM1880) += reset-bm1880.o
obj-$(CONFIG_RESET_BRCMSTB) += reset-brcmstb.o
obj-$(CONFIG_RESET_HSDK) += reset-hsdk.o
obj-$(CONFIG_RESET_IMX7) += reset-imx7.o
diff --git a/drivers/reset/reset-simple.c b/drivers/reset/reset-simple.c
index 77fbba3100c8..fd1fa4984d76 100644
--- a/drivers/reset/reset-simple.c
+++ b/drivers/reset/reset-simple.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* Simple Reset Controller Driver
*
@@ -8,11 +9,6 @@
* Copyright 2013 Maxime Ripard
*
* Maxime Ripard <maxime.ripard@free-electrons.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
*/

#include <linux/device.h>
@@ -119,6 +115,14 @@ static const struct reset_simple_devdata reset_simple_active_low = {
.status_active_low = true,
};

+#define BM1880_NR_BANKS 2
+
+static const struct reset_simple_devdata reset_simple_bm1880 = {
+ .nr_resets = BM1880_NR_BANKS * 32,
+ .active_low = true,
+ .status_active_low = true,
+};
+
static const struct of_device_id reset_simple_dt_ids[] = {
{ .compatible = "altr,stratix10-rst-mgr",
.data = &reset_simple_socfpga },
@@ -129,6 +133,8 @@ static const struct of_device_id reset_simple_dt_ids[] = {
.data = &reset_simple_active_low },
{ .compatible = "aspeed,ast2400-lpc-reset" },
{ .compatible = "aspeed,ast2500-lpc-reset" },
+ { .compatible = "bitmain,bm1880-reset",
+ .data = &reset_simple_bm1880 },
{ /* sentinel */ },
};

--
2.17.1
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