drivers: reset: stih407: add powerdown/softreset controllers

this patch adds the powerdown/softreset controllers for the
STiH407 SoC.

v2: remove the STIH407_RESET Koption.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>

4 files changed, 145 insertions, 0 deletions

diff --git a/drivers/reset/sti/Kconfig b/drivers/reset/sti/Kconfig
index 88d2d0316613..f8c15a37fb35 100644
--- a/drivers/reset/sti/Kconfig
+++ b/drivers/reset/sti/Kconfig
@@ -12,4 +12,8 @@ config STIH416_RESET
 	bool
 	select STI_RESET_SYSCFG
 
+config STIH407_RESET
+	bool
+	select STI_RESET_SYSCFG
+
 endif
diff --git a/drivers/reset/sti/Makefile b/drivers/reset/sti/Makefile
index be1c97647871..dc85dfbe56a9 100644
--- a/drivers/reset/sti/Makefile
+++ b/drivers/reset/sti/Makefile
@@ -2,3 +2,4 @@ obj-$(CONFIG_STI_RESET_SYSCFG) += reset-syscfg.o
 
 obj-$(CONFIG_STIH415_RESET) += reset-stih415.o
 obj-$(CONFIG_STIH416_RESET) += reset-stih416.o
+obj-$(CONFIG_STIH407_RESET) += reset-stih407.o
diff --git a/drivers/reset/sti/reset-stih407.c b/drivers/reset/sti/reset-stih407.c
new file mode 100644
index 000000000000..4a57742f4db6
--- /dev/null
+++ b/drivers/reset/sti/reset-stih407.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited
+ * Author: Giuseppe Cavallaro <peppe.cavallaro@st.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/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+
+#include <dt-bindings/reset-controller/stih407-resets.h>
+
+#include "reset-syscfg.h"
+
+/*
+ * STiH407 Peripheral powerdown definitions.
+ */
+static const char stih407_core[] = "st,stih407-core-syscfg";
+static const char stih407_sbc_reg[] = "st,stih407-sbc-reg-syscfg";
+static const char stih407_lpm[] = "st,stih407-lpm-syscfg";
+
+#define STIH407_PDN_0(_bit) \
+	_SYSCFG_RST_CH(stih407_core, SYSCFG_5000, _bit, SYSSTAT_5500, _bit)
+#define STIH407_PDN_1(_bit) \
+	_SYSCFG_RST_CH(stih407_core, SYSCFG_5001, _bit, SYSSTAT_5501, _bit)
+#define STIH407_PDN_ETH(_bit, _stat) \
+	_SYSCFG_RST_CH(stih407_sbc_reg, SYSCFG_4032, _bit, SYSSTAT_4520, _stat)
+
+/* Powerdown requests control 0 */
+#define SYSCFG_5000	0x0
+#define SYSSTAT_5500	0x7d0
+/* Powerdown requests control 1 (High Speed Links) */
+#define SYSCFG_5001	0x4
+#define SYSSTAT_5501	0x7d4
+
+/* Ethernet powerdown/status/reset */
+#define	SYSCFG_4032	0x80
+#define	SYSSTAT_4520	0x820
+
+#define	SYSCFG_4002	0x8
+
+static const struct syscfg_reset_channel_data stih407_powerdowns[] = {
+	[STIH407_EMISS_POWERDOWN] = STIH407_PDN_0(1),
+	[STIH407_NAND_POWERDOWN] = STIH407_PDN_0(0),
+	[STIH407_USB3_POWERDOWN] = STIH407_PDN_1(6),
+	[STIH407_USB2_PORT1_POWERDOWN] = STIH407_PDN_1(5),
+	[STIH407_USB2_PORT0_POWERDOWN] = STIH407_PDN_1(4),
+	[STIH407_PCIE1_POWERDOWN] = STIH407_PDN_1(3),
+	[STIH407_PCIE0_POWERDOWN] = STIH407_PDN_1(2),
+	[STIH407_SATA1_POWERDOWN] = STIH407_PDN_1(1),
+	[STIH407_SATA0_POWERDOWN] = STIH407_PDN_1(0),
+	[STIH407_ETH1_POWERDOWN] = STIH407_PDN_ETH(0, 2),
+};
+
+/* Reset Generator control 0/1 */
+#define	SYSCFG_5131	0x20c
+#define	SYSCFG_5132	0x210
+
+#define LPM_SYSCFG_1    0x4	/* Softreset IRB & SBC UART */
+
+static const struct syscfg_reset_channel_data stih407_softresets[] = {
+	[STIH407_ETH1_SOFTRESET] = SYSCFG_SRST(stih407_sbc_reg, SYSCFG_4002, 4),
+	[STIH407_MMC1_SOFTRESET] = SYSCFG_SRST(stih407_core, SYSCFG_5132, 3),
+	[STIH407_USB3_MIPHY2_SOFTRESET] = SYSCFG_SRST(stih407_core, SYSCFG_5132,
+						      22),
+	[STIH407_PICOPHY_SOFTRESET] = SYSCFG_SRST(stih407_core, SYSCFG_5132,
+						  30),
+	[STIH407_IRB_SOFTRESET] = SYSCFG_SRST(stih407_lpm, LPM_SYSCFG_1, 6),
+};
+
+static struct syscfg_reset_controller_data stih407_powerdown_controller = {
+	.wait_for_ack = true,
+	.nr_channels = ARRAY_SIZE(stih407_powerdowns),
+	.channels = stih407_powerdowns,
+};
+
+static struct syscfg_reset_controller_data stih407_softreset_controller = {
+	.wait_for_ack = false,
+	.active_low = true,
+	.nr_channels = ARRAY_SIZE(stih407_softresets),
+	.channels = stih407_softresets,
+};
+
+static struct of_device_id stih407_reset_match[] = {
+	{.compatible = "st,stih407-powerdown",
+	 .data = &stih407_powerdown_controller,},
+	{.compatible = "st,stih407-softreset",
+	 .data = &stih407_softreset_controller,},
+	{},
+};
+
+static struct platform_driver stih407_reset_driver = {
+	.probe = syscfg_reset_probe,
+	.driver = {
+		   .name = "reset-stih407",
+		   .owner = THIS_MODULE,
+		   .of_match_table = stih407_reset_match,
+		   },
+};
+
+static int __init stih407_reset_init(void)
+{
+	return platform_driver_register(&stih407_reset_driver);
+}
+
+arch_initcall(stih407_reset_init);
diff --git a/include/dt-bindings/reset-controller/stih407-resets.h b/include/dt-bindings/reset-controller/stih407-resets.h
new file mode 100644
index 000000000000..d68650b3bca5
--- /dev/null
+++ b/include/dt-bindings/reset-controller/stih407-resets.h
@@ -0,0 +1,30 @@
+/*
+ * This header provides constants for the reset controller
+ * based peripheral powerdown requests on the STMicroelectronics
+ * STiH407 SoC.
+ */
+#ifndef _DT_BINDINGS_RESET_CONTROLLER_STIH407
+#define _DT_BINDINGS_RESET_CONTROLLER_STIH407
+
+/* Powerdown requests control 0 */
+#define STIH407_EMISS_POWERDOWN		0
+#define STIH407_NAND_POWERDOWN		1
+
+/* Synp GMAC PowerDown */
+#define	STIH407_ETH1_POWERDOWN		2
+/* Powerdown requests control 1 */
+#define STIH407_USB3_POWERDOWN		3
+#define STIH407_USB2_PORT1_POWERDOWN	4
+#define STIH407_USB2_PORT0_POWERDOWN	5
+#define STIH407_PCIE1_POWERDOWN		6
+#define STIH407_PCIE0_POWERDOWN		7
+#define STIH407_SATA1_POWERDOWN		8
+#define STIH407_SATA0_POWERDOWN		9
+
+/* Reset defines */
+#define	STIH407_ETH1_SOFTRESET		0
+#define	STIH407_MMC1_SOFTRESET		1
+#define	STIH407_USB3_MIPHY2_SOFTRESET	2
+#define	STIH407_PICOPHY_SOFTRESET	3
+#define	STIH407_IRB_SOFTRESET		4
+#endif /* _DT_BINDINGS_RESET_CONTROLLER_STIH407 */