Merge tag 'at91-soc-6.12' of https://git.kernel.org/pub/scm/linux/kernel/git/at91/linux into soc/drivers

Microchip AT91 SoC updates for v6.12

It contains:
- support for the Microchip SAM9X7 SoC:
-- power management
-- SoC identification
-- sysreg documentation updates
-- necessary Kconfig updates

* tag 'at91-soc-6.12' of https://git.kernel.org/pub/scm/linux/kernel/git/at91/linux:
  ARM: at91: Kconfig: add config flag for SAM9X7 SoC
  ARM: at91: add support in SoC driver for new sam9x7
  ARM: at91: pm: add sam9x7 SoC init config
  ARM: at91: pm: add support for sam9x7 SoC family
  dt-bindings: atmel-sysreg: add sam9x7

Link: https://lore.kernel.org/r/20240901133110.2038675-3-claudiu.beznea@tuxon.dev
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

5 files changed, 84 insertions, 3 deletions

diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index a8c022b4c053..344f5305f69a 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -141,11 +141,27 @@ config SOC_SAM9X60
 	help
 	  Select this if you are using Microchip's SAM9X60 SoC
 
+config SOC_SAM9X7
+	bool "SAM9X7"
+	depends on ARCH_MULTI_V5
+	select ATMEL_AIC5_IRQ
+	select ATMEL_PM if PM
+	select CPU_ARM926T
+	select HAVE_AT91_USB_CLK
+	select HAVE_AT91_GENERATED_CLK
+	select HAVE_AT91_SAM9X60_PLL
+	select MEMORY
+	select PINCTRL_AT91
+	select SOC_SAM_V4_V5
+	select SRAM if PM
+	help
+	  Select this if you are using Microchip's SAM9X7 SoC
+
 comment "Clocksource driver selection"
 
 config ATMEL_CLOCKSOURCE_PIT
 	bool "Periodic Interval Timer (PIT) support"
-	depends on SOC_AT91SAM9 || SOC_SAM9X60 || SOC_SAMA5
+	depends on SOC_AT91SAM9 || SOC_SAM9X60 || SOC_SAM9X7 || SOC_SAMA5
 	default SOC_AT91SAM9 || SOC_SAMA5
 	select ATMEL_PIT
 	help
@@ -155,7 +171,7 @@ config ATMEL_CLOCKSOURCE_PIT
 
 config ATMEL_CLOCKSOURCE_TCB
 	bool "Timer Counter Blocks (TCB) support"
-	default SOC_AT91RM9200 || SOC_AT91SAM9 || SOC_SAM9X60 || SOC_SAMA5
+	default SOC_AT91RM9200 || SOC_AT91SAM9 || SOC_SAM9X60 || SOC_SAM9X7 || SOC_SAMA5
 	select ATMEL_TCB_CLKSRC
 	help
 	  Select this to get a high precision clocksource based on a
@@ -166,7 +182,7 @@ config ATMEL_CLOCKSOURCE_TCB
 
 config MICROCHIP_CLOCKSOURCE_PIT64B
 	bool "64-bit Periodic Interval Timer (PIT64B) support"
-	default SOC_SAM9X60 || SOC_SAMA7
+	default SOC_SAM9X60 || SOC_SAM9X7 || SOC_SAMA7
 	select MICROCHIP_PIT64B
 	help
 	  Select this to get a high resolution clockevent (SAM9X60) or
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index 794bd12ab0a8..7d8a7bc44e65 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -7,6 +7,7 @@
 obj-$(CONFIG_SOC_AT91RM9200)	+= at91rm9200.o
 obj-$(CONFIG_SOC_AT91SAM9)	+= at91sam9.o
 obj-$(CONFIG_SOC_SAM9X60)	+= sam9x60.o
+obj-$(CONFIG_SOC_SAM9X7)	+= sam9x7.o
 obj-$(CONFIG_SOC_SAMA5)		+= sama5.o sam_secure.o
 obj-$(CONFIG_SOC_SAMA7)		+= sama7.o
 obj-$(CONFIG_SOC_SAMV7)		+= samv7.o
diff --git a/arch/arm/mach-at91/generic.h b/arch/arm/mach-at91/generic.h
index 0c3960a8b3eb..acf0b3c82a30 100644
--- a/arch/arm/mach-at91/generic.h
+++ b/arch/arm/mach-at91/generic.h
@@ -12,6 +12,7 @@
 extern void __init at91rm9200_pm_init(void);
 extern void __init at91sam9_pm_init(void);
 extern void __init sam9x60_pm_init(void);
+extern void __init sam9x7_pm_init(void);
 extern void __init sama5_pm_init(void);
 extern void __init sama5d2_pm_init(void);
 extern void __init sama7_pm_init(void);
@@ -19,6 +20,7 @@ extern void __init sama7_pm_init(void);
 static inline void __init at91rm9200_pm_init(void) { }
 static inline void __init at91sam9_pm_init(void) { }
 static inline void __init sam9x60_pm_init(void) { }
+static inline void __init sam9x7_pm_init(void) { }
 static inline void __init sama5_pm_init(void) { }
 static inline void __init sama5d2_pm_init(void) { }
 static inline void __init sama7_pm_init(void) { }
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 345b91dc6627..b9b995f8a36e 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -233,6 +233,13 @@ static const struct of_device_id sama7g5_ws_ids[] = {
 	{ /* sentinel */ }
 };
 
+static const struct of_device_id sam9x7_ws_ids[] = {
+	{ .compatible = "microchip,sam9x7-rtc",		.data = &ws_info[1] },
+	{ .compatible = "microchip,sam9x7-rtt",		.data = &ws_info[4] },
+	{ .compatible = "microchip,sam9x7-gem",		.data = &ws_info[5] },
+	{ /* sentinel */ }
+};
+
 static int at91_pm_config_ws(unsigned int pm_mode, bool set)
 {
 	const struct wakeup_source_info *wsi;
@@ -1361,6 +1368,7 @@ static const struct of_device_id atmel_pmc_ids[] __initconst = {
 	{ .compatible = "atmel,sama5d4-pmc", .data = &pmc_infos[1] },
 	{ .compatible = "atmel,sama5d2-pmc", .data = &pmc_infos[1] },
 	{ .compatible = "microchip,sam9x60-pmc", .data = &pmc_infos[4] },
+	{ .compatible = "microchip,sam9x7-pmc", .data = &pmc_infos[4] },
 	{ .compatible = "microchip,sama7g5-pmc", .data = &pmc_infos[5] },
 	{ /* sentinel */ },
 };
@@ -1499,6 +1507,27 @@ void __init sam9x60_pm_init(void)
 	soc_pm.config_pmc_ws = at91_sam9x60_config_pmc_ws;
 }
 
+void __init sam9x7_pm_init(void)
+{
+	static const int modes[] __initconst = {
+		AT91_PM_STANDBY, AT91_PM_ULP0,
+	};
+	int ret;
+
+	if (!IS_ENABLED(CONFIG_SOC_SAM9X7))
+		return;
+
+	at91_pm_modes_validate(modes, ARRAY_SIZE(modes));
+	ret = at91_dt_ramc(false);
+	if (ret)
+		return;
+
+	at91_pm_init(NULL);
+
+	soc_pm.ws_ids = sam9x7_ws_ids;
+	soc_pm.config_pmc_ws = at91_sam9x60_config_pmc_ws;
+}
+
 void __init at91sam9_pm_init(void)
 {
 	int ret;
diff --git a/arch/arm/mach-at91/sam9x7.c b/arch/arm/mach-at91/sam9x7.c
new file mode 100644
index 000000000000..e1ff30b5b09b
--- /dev/null
+++ b/arch/arm/mach-at91/sam9x7.c
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Setup code for SAM9X7.
+ *
+ * Copyright (C) 2023 Microchip Technology Inc. and its subsidiaries
+ *
+ * Author: Varshini Rajendran <varshini.rajendran@microchip.com>
+ */
+
+#include <linux/of.h>
+#include <linux/of_platform.h>
+
+#include <asm/mach/arch.h>
+
+#include "generic.h"
+
+static void __init sam9x7_init(void)
+{
+	of_platform_default_populate(NULL, NULL, NULL);
+
+	sam9x7_pm_init();
+}
+
+static const char * const sam9x7_dt_board_compat[] __initconst = {
+	"microchip,sam9x7",
+	NULL
+};
+
+DT_MACHINE_START(sam9x7_dt, "Microchip SAM9X7")
+	/* Maintainer: Microchip */
+	.init_machine	= sam9x7_init,
+	.dt_compat	= sam9x7_dt_board_compat,
+MACHINE_END