diff --git a/Documentation/devicetree/bindings/arm/atmel-at91.txt b/Documentation/devicetree/bindings/arm/atmel-at91.txt
index 16f60b41c147..33bcf8b57798 100644
--- a/Documentation/devicetree/bindings/arm/atmel-at91.txt
+++ b/Documentation/devicetree/bindings/arm/atmel-at91.txt
@@ -61,6 +61,7 @@ RAMC SDRAM/DDR Controller required properties:
- compatible: Should be "atmel,at91rm9200-sdramc",
"atmel,at91sam9260-sdramc",
"atmel,at91sam9g45-ddramc",
+ "atmel,sama5d3-ddramc",
- reg: Should contain registers location and length
For at91sam9263 and at91sam9g45 you must specify 2 entries.
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index dd28e1fedbdc..6aa7ab47205e 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -53,6 +53,8 @@ config SOC_AT91SAM9
select ATMEL_AIC_IRQ if !OLD_IRQ_AT91
select CPU_ARM926T
select GENERIC_CLOCKEVENTS
+ select MEMORY if USE_OF
+ select ATMEL_SDRAMC if USE_OF
config SOC_SAMA5
bool
@@ -61,6 +63,8 @@ config SOC_SAMA5
select CPU_V7
select GENERIC_CLOCKEVENTS
select USE_OF
+ select MEMORY
+ select ATMEL_SDRAMC
menu "Atmel AT91 System-on-Chip"
diff --git a/arch/arm/mach-at91/setup.c b/arch/arm/mach-at91/setup.c
index 0bf893a574f9..1174b5fe74d8 100644
--- a/arch/arm/mach-at91/setup.c
+++ b/arch/arm/mach-at91/setup.c
@@ -385,6 +385,7 @@ static struct of_device_id ramc_ids[] = {
{ .compatible = "atmel,at91rm9200-sdramc", .data = at91rm9200_standby },
{ .compatible = "atmel,at91sam9260-sdramc", .data = at91sam9_sdram_standby },
{ .compatible = "atmel,at91sam9g45-ddramc", .data = at91_ddr_standby },
+ { .compatible = "atmel,sama5d3-ddramc", .data = at91_ddr_standby },
{ /*sentinel*/ }
};
diff --git a/drivers/clk/at91/clk-system.c b/drivers/clk/at91/clk-system.c
index 8c96307d7363..a76d03fd577b 100644
--- a/drivers/clk/at91/clk-system.c
+++ b/drivers/clk/at91/clk-system.c
@@ -119,13 +119,7 @@ at91_clk_register_system(struct at91_pmc *pmc, const char *name,
init.ops = &system_ops;
init.parent_names = &parent_name;
init.num_parents = 1;
- /*
- * CLK_IGNORE_UNUSED is used to avoid ddrck switch off.
- * TODO : we should implement a driver supporting at91 ddr controller
- * (see drivers/memory) which would request and enable the ddrck clock.
- * When this is done we will be able to remove CLK_IGNORE_UNUSED flag.
- */
- init.flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED;
+ init.flags = CLK_SET_RATE_PARENT;
sys->id = id;
sys->hw.init = &init;
diff --git a/drivers/memory/Kconfig b/drivers/memory/Kconfig
index fab81a143bd7..6d91c27fd4c8 100644
--- a/drivers/memory/Kconfig
+++ b/drivers/memory/Kconfig
@@ -7,6 +7,16 @@ menuconfig MEMORY
if MEMORY
+config ATMEL_SDRAMC
+ bool "Atmel (Multi-port DDR-)SDRAM Controller"
+ default y
+ depends on ARCH_AT91 && OF
+ help
+ This driver is for Atmel SDRAM Controller or Atmel Multi-port
+ DDR-SDRAM Controller available on Atmel AT91SAM9 and SAMA5 SoCs.
+ Starting with the at91sam9g45, this controller supports SDR, DDR and
+ LP-DDR memories.
+
config TI_AEMIF
tristate "Texas Instruments AEMIF driver"
depends on (ARCH_DAVINCI || ARCH_KEYSTONE) && OF
diff --git a/drivers/memory/Makefile b/drivers/memory/Makefile
index 4055c47f45ab..c32d31981be3 100644
--- a/drivers/memory/Makefile
+++ b/drivers/memory/Makefile
@@ -5,6 +5,7 @@
ifeq ($(CONFIG_DDR),y)
obj-$(CONFIG_OF) += of_memory.o
endif
+obj-$(CONFIG_ATMEL_SDRAMC) += atmel-sdramc.o
obj-$(CONFIG_TI_AEMIF) += ti-aemif.o
obj-$(CONFIG_TI_EMIF) += emif.o
obj-$(CONFIG_FSL_CORENET_CF) += fsl-corenet-cf.o
diff --git a/drivers/memory/atmel-sdramc.c b/drivers/memory/atmel-sdramc.c
new file mode 100644
index 000000000000..fed04e8efe75
--- /dev/null
+++ b/drivers/memory/atmel-sdramc.c
@@ -0,0 +1,98 @@
+/*
+ * Atmel (Multi-port DDR-)SDRAM Controller driver
+ *
+ * Copyright (C) 2014 Atmel
+ *
+ * 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 version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ *
+ */
+
+#include
+#include
+#include
+#include
+#include
+#include
+
+struct at91_ramc_caps {
+ bool has_ddrck;
+ bool has_mpddr_clk;
+};
+
+static const struct at91_ramc_caps at91rm9200_caps = { };
+
+static const struct at91_ramc_caps at91sam9g45_caps = {
+ .has_ddrck = 1,
+ .has_mpddr_clk = 0,
+};
+
+static const struct at91_ramc_caps sama5d3_caps = {
+ .has_ddrck = 1,
+ .has_mpddr_clk = 1,
+};
+
+static const struct of_device_id atmel_ramc_of_match[] = {
+ { .compatible = "atmel,at91rm9200-sdramc", .data = &at91rm9200_caps, },
+ { .compatible = "atmel,at91sam9260-sdramc", .data = &at91rm9200_caps, },
+ { .compatible = "atmel,at91sam9g45-ddramc", .data = &at91sam9g45_caps, },
+ { .compatible = "atmel,sama5d3-ddramc", .data = &sama5d3_caps, },
+ {},
+};
+MODULE_DEVICE_TABLE(of, atmel_ramc_of_match);
+
+static int atmel_ramc_probe(struct platform_device *pdev)
+{
+ const struct of_device_id *match;
+ const struct at91_ramc_caps *caps;
+ struct clk *clk;
+
+ match = of_match_device(atmel_ramc_of_match, &pdev->dev);
+ caps = match->data;
+
+ if (caps->has_ddrck) {
+ clk = devm_clk_get(&pdev->dev, "ddrck");
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+ clk_prepare_enable(clk);
+ }
+
+ if (caps->has_mpddr_clk) {
+ clk = devm_clk_get(&pdev->dev, "mpddr");
+ if (IS_ERR(clk)) {
+ pr_err("AT91 RAMC: couldn't get mpddr clock\n");
+ return PTR_ERR(clk);
+ }
+ clk_prepare_enable(clk);
+ }
+
+ return 0;
+}
+
+static struct platform_driver atmel_ramc_driver = {
+ .probe = atmel_ramc_probe,
+ .driver = {
+ .name = "atmel-ramc",
+ .owner = THIS_MODULE,
+ .of_match_table = atmel_ramc_of_match,
+ },
+};
+
+static int __init atmel_ramc_init(void)
+{
+ return platform_driver_register(&atmel_ramc_driver);
+}
+module_init(atmel_ramc_init);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Alexandre Belloni ");
+MODULE_DESCRIPTION("Atmel (Multi-port DDR-)SDRAM Controller");
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
index ca41523bbebf..c1c046d0464e 100644
--- a/drivers/power/reset/Kconfig
+++ b/drivers/power/reset/Kconfig
@@ -6,15 +6,33 @@ menuconfig POWER_RESET
Say Y here to enable board reset and power off
+if POWER_RESET
+
config POWER_RESET_AS3722
bool "ams AS3722 power-off driver"
- depends on MFD_AS3722 && POWER_RESET
+ depends on MFD_AS3722
help
This driver supports turning off board via a ams AS3722 power-off.
+config POWER_RESET_AT91_POWEROFF
+ bool "Atmel AT91 poweroff driver"
+ depends on MACH_AT91
+ default SOC_AT91SAM9 || SOC_SAMA5
+ help
+ This driver supports poweroff for Atmel AT91SAM9 and SAMA5
+ SoCs
+
+config POWER_RESET_AT91_RESET
+ bool "Atmel AT91 reset driver"
+ depends on MACH_AT91
+ default SOC_AT91SAM9 || SOC_SAMA5
+ help
+ This driver supports restart for Atmel AT91SAM9 and SAMA5
+ SoCs
+
config POWER_RESET_AXXIA
bool "LSI Axxia reset driver"
- depends on POWER_RESET && ARCH_AXXIA
+ depends on ARCH_AXXIA
help
This driver supports restart for Axxia SoC.
@@ -33,7 +51,7 @@ config POWER_RESET_BRCMSTB
config POWER_RESET_GPIO
bool "GPIO power-off driver"
- depends on OF_GPIO && POWER_RESET
+ depends on OF_GPIO
help
This driver supports turning off your board via a GPIO line.
If your board needs a GPIO high/low to power down, say Y and
@@ -47,13 +65,13 @@ config POWER_RESET_HISI
config POWER_RESET_MSM
bool "Qualcomm MSM power-off driver"
- depends on POWER_RESET && ARCH_QCOM
+ depends on ARCH_QCOM
help
Power off and restart support for Qualcomm boards.
config POWER_RESET_QNAP
bool "QNAP power-off driver"
- depends on OF_GPIO && POWER_RESET && PLAT_ORION
+ depends on OF_GPIO && PLAT_ORION
help
This driver supports turning off QNAP NAS devices by sending
commands to the microcontroller which controls the main power.
@@ -71,14 +89,13 @@ config POWER_RESET_RESTART
config POWER_RESET_SUN6I
bool "Allwinner A31 SoC reset driver"
depends on ARCH_SUNXI
- depends on POWER_RESET
help
Reboot support for the Allwinner A31 SoCs.
config POWER_RESET_VEXPRESS
bool "ARM Versatile Express power-off and reset driver"
depends on ARM || ARM64
- depends on POWER_RESET && VEXPRESS_CONFIG
+ depends on VEXPRESS_CONFIG
help
Power off and reset support for the ARM Ltd. Versatile
Express boards.
@@ -86,7 +103,6 @@ config POWER_RESET_VEXPRESS
config POWER_RESET_XGENE
bool "APM SoC X-Gene reset driver"
depends on ARM64
- depends on POWER_RESET
help
Reboot support for the APM SoC X-Gene Eval boards.
@@ -97,3 +113,4 @@ config POWER_RESET_KEYSTONE
help
Reboot support for the KEYSTONE SoCs.
+endif
diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile
index a42e70edd037..4433a753fd93 100644
--- a/drivers/power/reset/Makefile
+++ b/drivers/power/reset/Makefile
@@ -1,4 +1,6 @@
obj-$(CONFIG_POWER_RESET_AS3722) += as3722-poweroff.o
+obj-$(CONFIG_POWER_RESET_AT91_POWEROFF) += at91-poweroff.o
+obj-$(CONFIG_POWER_RESET_AT91_RESET) += at91-reset.o
obj-$(CONFIG_POWER_RESET_AXXIA) += axxia-reset.o
obj-$(CONFIG_POWER_RESET_BRCMSTB) += brcmstb-reboot.o
obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o
diff --git a/drivers/power/reset/at91-poweroff.c b/drivers/power/reset/at91-poweroff.c
new file mode 100644
index 000000000000..40bf42d146f1
--- /dev/null
+++ b/drivers/power/reset/at91-poweroff.c
@@ -0,0 +1,156 @@
+/*
+ * Atmel AT91 SAM9 SoCs reset code
+ *
+ * Copyright (C) 2007 Atmel Corporation.
+ * Copyright (C) 2011 Jean-Christophe PLAGNIOL-VILLARD
+ * Copyright (C) 2014 Free Electrons
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include
+#include
+#include
+#include
+#include
+
+#define AT91_SHDW_CR 0x00 /* Shut Down Control Register */
+#define AT91_SHDW_SHDW BIT(0) /* Shut Down command */
+#define AT91_SHDW_KEY (0xa5 << 24) /* KEY Password */
+
+#define AT91_SHDW_MR 0x04 /* Shut Down Mode Register */
+#define AT91_SHDW_WKMODE0 GENMASK(2, 0) /* Wake-up 0 Mode Selection */
+#define AT91_SHDW_CPTWK0_MAX 0xf /* Maximum Counter On Wake Up 0 */
+#define AT91_SHDW_CPTWK0 (AT91_SHDW_CPTWK0_MAX << 4) /* Counter On Wake Up 0 */
+#define AT91_SHDW_CPTWK0_(x) ((x) << 4)
+#define AT91_SHDW_RTTWKEN BIT(16) /* Real Time Timer Wake-up Enable */
+#define AT91_SHDW_RTCWKEN BIT(17) /* Real Time Clock Wake-up Enable */
+
+#define AT91_SHDW_SR 0x08 /* Shut Down Status Register */
+#define AT91_SHDW_WAKEUP0 BIT(0) /* Wake-up 0 Status */
+#define AT91_SHDW_RTTWK BIT(16) /* Real-time Timer Wake-up */
+#define AT91_SHDW_RTCWK BIT(17) /* Real-time Clock Wake-up [SAM9RL] */
+
+enum wakeup_type {
+ AT91_SHDW_WKMODE0_NONE = 0,
+ AT91_SHDW_WKMODE0_HIGH = 1,
+ AT91_SHDW_WKMODE0_LOW = 2,
+ AT91_SHDW_WKMODE0_ANYLEVEL = 3,
+};
+
+static const char *shdwc_wakeup_modes[] = {
+ [AT91_SHDW_WKMODE0_NONE] = "none",
+ [AT91_SHDW_WKMODE0_HIGH] = "high",
+ [AT91_SHDW_WKMODE0_LOW] = "low",
+ [AT91_SHDW_WKMODE0_ANYLEVEL] = "any",
+};
+
+static void __iomem *at91_shdwc_base;
+
+static void __init at91_wakeup_status(void)
+{
+ u32 reg = readl(at91_shdwc_base);
+ char *reason = "unknown";
+
+ /* Simple power-on, just bail out */
+ if (!reg)
+ return;
+
+ if (reg & AT91_SHDW_RTTWK)
+ reason = "RTT";
+ else if (reg & AT91_SHDW_RTCWK)
+ reason = "RTC";
+
+ pr_info("AT91: Wake-Up source: %s\n", reason);
+}
+
+static void at91_poweroff(void)
+{
+ writel(AT91_SHDW_KEY | AT91_SHDW_SHDW, at91_shdwc_base + AT91_SHDW_CR);
+}
+
+const enum wakeup_type at91_poweroff_get_wakeup_mode(struct device_node *np)
+{
+ const char *pm;
+ int err, i;
+
+ err = of_property_read_string(np, "atmel,wakeup-mode", &pm);
+ if (err < 0)
+ return AT91_SHDW_WKMODE0_ANYLEVEL;
+
+ for (i = 0; i < ARRAY_SIZE(shdwc_wakeup_modes); i++)
+ if (!strcasecmp(pm, shdwc_wakeup_modes[i]))
+ return i;
+
+ return -ENODEV;
+}
+
+static void at91_poweroff_dt_set_wakeup_mode(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ enum wakeup_type wakeup_mode;
+ u32 mode = 0, tmp;
+
+ wakeup_mode = at91_poweroff_get_wakeup_mode(np);
+ if (wakeup_mode < 0) {
+ dev_warn(&pdev->dev, "shdwc unknown wakeup mode\n");
+ return;
+ }
+
+ if (!of_property_read_u32(np, "atmel,wakeup-counter", &tmp)) {
+ if (tmp > AT91_SHDW_CPTWK0_MAX) {
+ dev_warn(&pdev->dev,
+ "shdwc wakeup counter 0x%x > 0x%x reduce it to 0x%x\n",
+ tmp, AT91_SHDW_CPTWK0_MAX, AT91_SHDW_CPTWK0_MAX);
+ tmp = AT91_SHDW_CPTWK0_MAX;
+ }
+ mode |= AT91_SHDW_CPTWK0_(tmp);
+ }
+
+ if (of_property_read_bool(np, "atmel,wakeup-rtc-timer"))
+ mode |= AT91_SHDW_RTCWKEN;
+
+ if (of_property_read_bool(np, "atmel,wakeup-rtt-timer"))
+ mode |= AT91_SHDW_RTTWKEN;
+
+ writel(wakeup_mode | mode, at91_shdwc_base + AT91_SHDW_MR);
+}
+
+static int at91_poweroff_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ at91_shdwc_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(at91_shdwc_base)) {
+ dev_err(&pdev->dev, "Could not map reset controller address\n");
+ return PTR_ERR(at91_shdwc_base);
+ }
+
+ at91_wakeup_status();
+
+ if (pdev->dev.of_node)
+ at91_poweroff_dt_set_wakeup_mode(pdev);
+
+ pm_power_off = at91_poweroff;
+
+ return 0;
+}
+
+static struct of_device_id at91_poweroff_of_match[] = {
+ { .compatible = "atmel,at91sam9260-shdwc", },
+ { .compatible = "atmel,at91sam9rl-shdwc", },
+ { .compatible = "atmel,at91sam9x5-shdwc", },
+ { /*sentinel*/ }
+};
+
+static struct platform_driver at91_poweroff_driver = {
+ .probe = at91_poweroff_probe,
+ .driver = {
+ .name = "at91-poweroff",
+ .of_match_table = at91_poweroff_of_match,
+ },
+};
+module_platform_driver(at91_poweroff_driver);
diff --git a/drivers/power/reset/at91-reset.c b/drivers/power/reset/at91-reset.c
new file mode 100644
index 000000000000..3611806c9cfd
--- /dev/null
+++ b/drivers/power/reset/at91-reset.c
@@ -0,0 +1,252 @@
+/*
+ * Atmel AT91 SAM9 SoCs reset code
+ *
+ * Copyright (C) 2007 Atmel Corporation.
+ * Copyright (C) BitBox Ltd 2010
+ * Copyright (C) 2011 Jean-Christophe PLAGNIOL-VILLARD
+ * Copyright (C) 2014 Free Electrons
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include
+#include
+#include
+#include
+#include
+
+#include
+
+#include
+#include
+
+#define AT91_RSTC_CR 0x00 /* Reset Controller Control Register */
+#define AT91_RSTC_PROCRST BIT(0) /* Processor Reset */
+#define AT91_RSTC_PERRST BIT(2) /* Peripheral Reset */
+#define AT91_RSTC_EXTRST BIT(3) /* External Reset */
+#define AT91_RSTC_KEY (0xa5 << 24) /* KEY Password */
+
+#define AT91_RSTC_SR 0x04 /* Reset Controller Status Register */
+#define AT91_RSTC_URSTS BIT(0) /* User Reset Status */
+#define AT91_RSTC_RSTTYP GENMASK(10, 8) /* Reset Type */
+#define AT91_RSTC_NRSTL BIT(16) /* NRST Pin Level */
+#define AT91_RSTC_SRCMP BIT(17) /* Software Reset Command in Progress */
+
+#define AT91_RSTC_MR 0x08 /* Reset Controller Mode Register */
+#define AT91_RSTC_URSTEN BIT(0) /* User Reset Enable */
+#define AT91_RSTC_URSTIEN BIT(4) /* User Reset Interrupt Enable */
+#define AT91_RSTC_ERSTL GENMASK(11, 8) /* External Reset Length */
+
+enum reset_type {
+ RESET_TYPE_GENERAL = 0,
+ RESET_TYPE_WAKEUP = 1,
+ RESET_TYPE_WATCHDOG = 2,
+ RESET_TYPE_SOFTWARE = 3,
+ RESET_TYPE_USER = 4,
+};
+
+static void __iomem *at91_ramc_base[2], *at91_rstc_base;
+
+/*
+* unless the SDRAM is cleanly shutdown before we hit the
+* reset register it can be left driving the data bus and
+* killing the chance of a subsequent boot from NAND
+*/
+static void at91sam9260_restart(enum reboot_mode mode, const char *cmd)
+{
+ asm volatile(
+ /* Align to cache lines */
+ ".balign 32\n\t"
+
+ /* Disable SDRAM accesses */
+ "str %2, [%0, #" __stringify(AT91_SDRAMC_TR) "]\n\t"
+
+ /* Power down SDRAM */
+ "str %3, [%0, #" __stringify(AT91_SDRAMC_LPR) "]\n\t"
+
+ /* Reset CPU */
+ "str %4, [%1, #" __stringify(AT91_RSTC_CR) "]\n\t"
+
+ "b .\n\t"
+ :
+ : "r" (at91_ramc_base[0]),
+ "r" (at91_rstc_base),
+ "r" (1),
+ "r" (AT91_SDRAMC_LPCB_POWER_DOWN),
+ "r" (AT91_RSTC_KEY | AT91_RSTC_PERRST | AT91_RSTC_PROCRST));
+}
+
+static void at91sam9g45_restart(enum reboot_mode mode, const char *cmd)
+{
+ asm volatile(
+ /*
+ * Test wether we have a second RAM controller to care
+ * about.
+ *
+ * First, test that we can dereference the virtual address.
+ */
+ "cmp %1, #0\n\t"
+ "beq 1f\n\t"
+
+ /* Then, test that the RAM controller is enabled */
+ "ldr r0, [%1]\n\t"
+ "cmp r0, #0\n\t"
+
+ /* Align to cache lines */
+ ".balign 32\n\t"
+
+ /* Disable SDRAM0 accesses */
+ "1: str %3, [%0, #" __stringify(AT91_DDRSDRC_RTR) "]\n\t"
+ /* Power down SDRAM0 */
+ " str %4, [%0, #" __stringify(AT91_DDRSDRC_RTR) "]\n\t"
+ /* Disable SDRAM1 accesses */
+ " strne %3, [%1, #" __stringify(AT91_DDRSDRC_RTR) "]\n\t"
+ /* Power down SDRAM1 */
+ " strne %4, [%1, #" __stringify(AT91_DDRSDRC_RTR) "]\n\t"
+ /* Reset CPU */
+ " str %5, [%2, #" __stringify(AT91_RSTC_CR) "]\n\t"
+
+ " b .\n\t"
+ :
+ : "r" (at91_ramc_base[0]),
+ "r" (at91_ramc_base[1]),
+ "r" (at91_rstc_base),
+ "r" (1),
+ "r" (AT91_DDRSDRC_LPCB_POWER_DOWN),
+ "r" (AT91_RSTC_KEY | AT91_RSTC_PERRST | AT91_RSTC_PROCRST)
+ : "r0");
+}
+
+static void __init at91_reset_status(struct platform_device *pdev)
+{
+ u32 reg = readl(at91_rstc_base + AT91_RSTC_SR);
+ char *reason;
+
+ switch ((reg & AT91_RSTC_RSTTYP) >> 8) {
+ case RESET_TYPE_GENERAL:
+ reason = "general reset";
+ break;
+ case RESET_TYPE_WAKEUP:
+ reason = "wakeup";
+ break;
+ case RESET_TYPE_WATCHDOG:
+ reason = "watchdog reset";
+ break;
+ case RESET_TYPE_SOFTWARE:
+ reason = "software reset";
+ break;
+ case RESET_TYPE_USER:
+ reason = "user reset";
+ break;
+ default:
+ reason = "unknown reset";
+ break;
+ }
+
+ pr_info("AT91: Starting after %s\n", reason);
+}
+
+static struct of_device_id at91_ramc_of_match[] = {
+ { .compatible = "atmel,at91sam9260-sdramc", },
+ { .compatible = "atmel,at91sam9g45-ddramc", },
+ { .compatible = "atmel,sama5d3-ddramc", },
+ { /* sentinel */ }
+};
+
+static struct of_device_id at91_reset_of_match[] = {
+ { .compatible = "atmel,at91sam9260-rstc", .data = at91sam9260_restart },
+ { .compatible = "atmel,at91sam9g45-rstc", .data = at91sam9g45_restart },
+ { /* sentinel */ }
+};
+
+static int at91_reset_of_probe(struct platform_device *pdev)
+{
+ const struct of_device_id *match;
+ struct device_node *np;
+ int idx = 0;
+
+ at91_rstc_base = of_iomap(pdev->dev.of_node, 0);
+ if (!at91_rstc_base) {
+ dev_err(&pdev->dev, "Could not map reset controller address\n");
+ return -ENODEV;
+ }
+
+ for_each_matching_node(np, at91_ramc_of_match) {
+ at91_ramc_base[idx] = of_iomap(np, 0);
+ if (!at91_ramc_base[idx]) {
+ dev_err(&pdev->dev, "Could not map ram controller address\n");
+ return -ENODEV;
+ }
+ idx++;
+ }
+
+ match = of_match_node(at91_reset_of_match, pdev->dev.of_node);
+ arm_pm_restart = match->data;
+
+ return 0;
+}
+
+static int at91_reset_platform_probe(struct platform_device *pdev)
+{
+ const struct platform_device_id *match;
+ struct resource *res;
+ int idx = 0;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ at91_rstc_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(at91_rstc_base)) {
+ dev_err(&pdev->dev, "Could not map reset controller address\n");
+ return PTR_ERR(at91_rstc_base);
+ }
+
+ for (idx = 0; idx < 2; idx++) {
+ res = platform_get_resource(pdev, IORESOURCE_MEM, idx + 1 );
+ at91_ramc_base[idx] = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
+ if (IS_ERR(at91_ramc_base[idx])) {
+ dev_err(&pdev->dev, "Could not map ram controller address\n");
+ return PTR_ERR(at91_ramc_base[idx]);
+ }
+ }
+
+ match = platform_get_device_id(pdev);
+ arm_pm_restart = (void (*)(enum reboot_mode, const char*))
+ match->driver_data;
+
+ return 0;
+}
+
+static int at91_reset_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ if (pdev->dev.of_node)
+ ret = at91_reset_of_probe(pdev);
+ else
+ ret = at91_reset_platform_probe(pdev);
+
+ if (ret)
+ return ret;
+
+ at91_reset_status(pdev);
+
+ return 0;
+}
+
+static struct platform_device_id at91_reset_plat_match[] = {
+ { "at91-sam9260-reset", (unsigned long)at91sam9260_restart },
+ { "at91-sam9g45-reset", (unsigned long)at91sam9g45_restart },
+ { /* sentinel */ }
+};
+
+static struct platform_driver at91_reset_driver = {
+ .probe = at91_reset_probe,
+ .driver = {
+ .name = "at91-reset",
+ .of_match_table = at91_reset_of_match,
+ },
+ .id_table = at91_reset_plat_match,
+};
+module_platform_driver(at91_reset_driver);