Merge tag 'at91-5.2-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/at91/linux into arm/late

AT91 SoC for 5.2

 - PM changes for SAM9X60

* tag 'at91-5.2-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/at91/linux:
  ARM: at91: pm: do not disable/enable PLLA for ULP modes
  ARM: at91: pm: disable RC oscillator in ULP0
  ARM: at91: pm: add ULP1 support for SAM9X60
  ARM: at91: pm: add support for per SoC wakeup source configuration
  ARM: at91: pm: keep at91_pm_backup_init() only for SAMA5D2 SoCs
  ARM: at91: pm: initial PM support for SAM9X60
  dt-bindings: arm: atmel: add binding for SAM9X60 SoC
  ARM: at91: pm: introduce at91_soc_pm structure
Signed-off-by: Olof Johansson <olof@lixom.net>

Documentation/devicetree/bindings/arm/atmel-at91.txt

@@ -25,6 +25,7 @@ compatible: must be one of:
     o "atmel,at91sam9n12"
     o "atmel,at91sam9rl"
     o "atmel,at91sam9xe"
+    o "microchip,sam9x60"
  * "atmel,sama5" for SoCs using a Cortex-A5, shall be extended with the specific
    SoC family:
     o "atmel,sama5d2" shall be extended with the specific SoC compatible:

arch/arm/mach-at91/at91sam9.c

@@ -32,3 +32,21 @@ DT_MACHINE_START(at91sam_dt, "Atmel AT91SAM9")
 	.init_machine	= at91sam9_init,
 	.dt_compat	= at91_dt_board_compat,
 MACHINE_END
+
+static void __init sam9x60_init(void)
+{
+	of_platform_default_populate(NULL, NULL, NULL);
+
+	sam9x60_pm_init();
+}
+
+static const char *const sam9x60_dt_board_compat[] __initconst = {
+	"microchip,sam9x60",
+	NULL
+};
+
+DT_MACHINE_START(sam9x60_dt, "Microchip SAM9X60")
+	/* Maintainer: Microchip */
+	.init_machine	= sam9x60_init,
+	.dt_compat	= sam9x60_dt_board_compat,
+MACHINE_END

arch/arm/mach-at91/generic.h

@@ -14,11 +14,13 @@
 #ifdef CONFIG_PM
 extern void __init at91rm9200_pm_init(void);
 extern void __init at91sam9_pm_init(void);
+extern void __init sam9x60_pm_init(void);
 extern void __init sama5_pm_init(void);
 extern void __init sama5d2_pm_init(void);
 #else
 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 sama5_pm_init(void) { }
 static inline void __init sama5d2_pm_init(void) { }
 #endif

arch/arm/mach-at91/pm_suspend.S

@@ -50,15 +50,6 @@ tmp2	.req	r5
 	beq	1b
 	.endm
 
-/*
- * Wait until PLLA has locked.
- */
-	.macro wait_pllalock
-1:	ldr	tmp1, [pmc, #AT91_PMC_SR]
-	tst	tmp1, #AT91_PMC_LOCKA
-	beq	1b
-	.endm
-
 /*
  * Put the processor to enter the idle state
  */
@@ -178,11 +169,46 @@ ENDPROC(at91_backup_mode)
 	orr	tmp1, tmp1, #AT91_PMC_KEY
 	str	tmp1, [pmc, #AT91_CKGR_MOR]
 
+	/* Save RC oscillator state */
+	ldr	tmp1, [pmc, #AT91_PMC_SR]
+	str	tmp1, .saved_osc_status
+	tst	tmp1, #AT91_PMC_MOSCRCS
+	bne	1f
+
+	/* Turn off RC oscillator */
+	ldr	tmp1, [pmc, #AT91_CKGR_MOR]
+	bic	tmp1, tmp1, #AT91_PMC_MOSCRCEN
+	bic	tmp1, tmp1, #AT91_PMC_KEY_MASK
+	orr	tmp1, tmp1, #AT91_PMC_KEY
+	str	tmp1, [pmc, #AT91_CKGR_MOR]
+
+	/* Wait main RC disabled done */
+2:	ldr	tmp1, [pmc, #AT91_PMC_SR]
+	tst	tmp1, #AT91_PMC_MOSCRCS
+	bne	2b
+
 	/* Wait for interrupt */
-	at91_cpu_idle
+1:	at91_cpu_idle
 
-	/* Turn on the crystal oscillator */
+	/* Restore RC oscillator state */
+	ldr	tmp1, .saved_osc_status
+	tst	tmp1, #AT91_PMC_MOSCRCS
+	beq	4f
+
+	/* Turn on RC oscillator */
 	ldr	tmp1, [pmc, #AT91_CKGR_MOR]
+	orr	tmp1, tmp1, #AT91_PMC_MOSCRCEN
+	bic	tmp1, tmp1, #AT91_PMC_KEY_MASK
+	orr	tmp1, tmp1, #AT91_PMC_KEY
+	str	tmp1, [pmc, #AT91_CKGR_MOR]
+
+	/* Wait main RC stabilization */
+3:	ldr	tmp1, [pmc, #AT91_PMC_SR]
+	tst	tmp1, #AT91_PMC_MOSCRCS
+	beq	3b
+
+	/* Turn on the crystal oscillator */
+4:	ldr	tmp1, [pmc, #AT91_CKGR_MOR]
 	orr	tmp1, tmp1, #AT91_PMC_MOSCEN
 	orr	tmp1, tmp1, #AT91_PMC_KEY
 	str	tmp1, [pmc, #AT91_CKGR_MOR]
@@ -197,8 +223,26 @@ ENDPROC(at91_backup_mode)
 .macro at91_pm_ulp1_mode
 	ldr	pmc, .pmc_base
 
-	/* Switch the main clock source to 12-MHz RC oscillator */
+	/* Save RC oscillator state and check if it is enabled. */
+	ldr	tmp1, [pmc, #AT91_PMC_SR]
+	str	tmp1, .saved_osc_status
+	tst	tmp1, #AT91_PMC_MOSCRCS
+	bne	2f
+
+	/* Enable RC oscillator */
 	ldr	tmp1, [pmc, #AT91_CKGR_MOR]
+	orr	tmp1, tmp1, #AT91_PMC_MOSCRCEN
+	bic	tmp1, tmp1, #AT91_PMC_KEY_MASK
+	orr	tmp1, tmp1, #AT91_PMC_KEY
+	str	tmp1, [pmc, #AT91_CKGR_MOR]
+
+	/* Wait main RC stabilization */
+1:	ldr	tmp1, [pmc, #AT91_PMC_SR]
+	tst	tmp1, #AT91_PMC_MOSCRCS
+	beq	1b
+
+	/* Switch the main clock source to 12-MHz RC oscillator */
+2:	ldr	tmp1, [pmc, #AT91_CKGR_MOR]
 	bic	tmp1, tmp1, #AT91_PMC_MOSCSEL
 	bic	tmp1, tmp1, #AT91_PMC_KEY_MASK
 	orr	tmp1, tmp1, #AT91_PMC_KEY
@@ -262,6 +306,25 @@ ENDPROC(at91_backup_mode)
 	str	tmp1, [pmc, #AT91_PMC_MCKR]
 
 	wait_mckrdy
+
+	/* Restore RC oscillator state */
+	ldr	tmp1, .saved_osc_status
+	tst	tmp1, #AT91_PMC_MOSCRCS
+	bne	3f
+
+	/* Disable RC oscillator */
+	ldr	tmp1, [pmc, #AT91_CKGR_MOR]
+	bic	tmp1, tmp1, #AT91_PMC_MOSCRCEN
+	bic	tmp1, tmp1, #AT91_PMC_KEY_MASK
+	orr	tmp1, tmp1, #AT91_PMC_KEY
+	str	tmp1, [pmc, #AT91_CKGR_MOR]
+
+	/* Wait RC oscillator disable done */
+4:	ldr	tmp1, [pmc, #AT91_PMC_SR]
+	tst	tmp1, #AT91_PMC_MOSCRCS
+	bne	4b
+
+3:
 .endm
 
 ENTRY(at91_ulp_mode)
@@ -279,14 +342,6 @@ ENTRY(at91_ulp_mode)
 
 	wait_mckrdy
 
-	/* Save PLLA setting and disable it */
-	ldr	tmp1, [pmc, #AT91_CKGR_PLLAR]
-	str	tmp1, .saved_pllar
-
-	mov	tmp1, #AT91_PMC_PLLCOUNT
-	orr	tmp1, tmp1, #(1 << 29)		/* bit 29 always set */
-	str	tmp1, [pmc, #AT91_CKGR_PLLAR]
-
 	ldr	r0, .pm_mode
 	cmp	r0, #AT91_PM_ULP1
 	beq	ulp1_mode
@@ -301,18 +356,6 @@ ulp1_mode:
 ulp_exit:
 	ldr	pmc, .pmc_base
 
-	/* Restore PLLA setting */
-	ldr	tmp1, .saved_pllar
-	str	tmp1, [pmc, #AT91_CKGR_PLLAR]
-
-	tst	tmp1, #(AT91_PMC_MUL &  0xff0000)
-	bne	3f
-	tst	tmp1, #(AT91_PMC_MUL & ~0xff0000)
-	beq	4f
-3:
-	wait_pllalock
-4:
-
 	/*
 	 * Restore master clock setting
 	 */
@@ -465,8 +508,6 @@ ENDPROC(at91_sramc_self_refresh)
 	.word 0
 .saved_mckr:
 	.word 0
-.saved_pllar:
-	.word 0
 .saved_sam9_lpr:
 	.word 0
 .saved_sam9_lpr1:
@@ -475,6 +516,8 @@ ENDPROC(at91_sramc_self_refresh)
 	.word 0
 .saved_sam9_mdr1:
 	.word 0
+.saved_osc_status:
+	.word 0
 
 ENTRY(at91_pm_suspend_in_sram_sz)
 	.word .-at91_pm_suspend_in_sram

include/linux/clk/at91_pmc.h

@@ -161,6 +161,7 @@
 
 #define AT91_PMC_FSMR		0x70		/* Fast Startup Mode Register */
 #define AT91_PMC_FSTT(n)	BIT(n)
+#define AT91_PMC_RTTAL		BIT(16)
 #define AT91_PMC_RTCAL		BIT(17)		/* RTC Alarm Enable */
 #define AT91_PMC_USBAL		BIT(18)		/* USB Resume Enable */
 #define AT91_PMC_SDMMC_CD	BIT(19)		/* SDMMC Card Detect Enable */