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From: Claudiu Beznea <claudiu.beznea@microchip.com>
To: <nicolas.ferre@microchip.com>, <alexandre.belloni@bootlin.com>,
	<ludovic.desroches@microchip.com>, <robh+dt@kernel.org>,
	<linux@armlinux.org.uk>
Cc: <linux-arm-kernel@lists.infradead.org>,
	<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	Claudiu Beznea <claudiu.beznea@microchip.com>
Subject: [PATCH v3 14/24] ARM: at91: pm: add support for 2.5V LDO regulator control
Date: Thu, 15 Apr 2021 13:50:00 +0300	[thread overview]
Message-ID: <20210415105010.569620-15-claudiu.beznea@microchip.com> (raw)
In-Reply-To: <20210415105010.569620-1-claudiu.beznea@microchip.com>

Add support to disable/enable 2.5V LDO regulator when entering/exiting
any ULP mode.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
---
 arch/arm/mach-at91/pm.h         |  1 +
 arch/arm/mach-at91/pm_suspend.S | 29 +++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/arch/arm/mach-at91/pm.h b/arch/arm/mach-at91/pm.h
index 666474088d55..53bdc9000e44 100644
--- a/arch/arm/mach-at91/pm.h
+++ b/arch/arm/mach-at91/pm.h
@@ -13,6 +13,7 @@
 #include <soc/at91/at91sam9_ddrsdr.h>
 #include <soc/at91/at91sam9_sdramc.h>
 #include <soc/at91/sama7-ddr.h>
+#include <soc/at91/sama7-sfrbu.h>
 
 #define AT91_MEMCTRL_MC		0
 #define AT91_MEMCTRL_SDRAMC	1
diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
index 8b0b8619ee8a..9c9e08fd8300 100644
--- a/arch/arm/mach-at91/pm_suspend.S
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -83,6 +83,29 @@ tmp3	.req	r6
 
 	.endm
 
+/**
+ * Set state for 2.5V low power regulator
+ * @ena: 0 - disable regulator
+ *	 1 - enable regulator
+ *
+ * Side effects: overwrites r7, r8, r9, r10
+ */
+	.macro at91_2_5V_reg_set_low_power ena
+#ifdef CONFIG_SOC_SAMA7
+	ldr	r7, .sfrbu
+	mov	r8, #\ena
+	ldr	r9, [r7, #AT91_SFRBU_25LDOCR]
+	orr	r9, r9, #AT91_SFRBU_25LDOCR_LP
+	cmp	r8, #1
+	beq	lp_done_\ena
+	bic	r9, r9, #AT91_SFRBU_25LDOCR_LP
+lp_done_\ena:
+	ldr	r10, =AT91_SFRBU_25LDOCR_LDOANAKEY
+	orr	r9, r9, r10
+	str	r9, [r7, #AT91_SFRBU_25LDOCR]
+#endif
+	.endm
+
 	.text
 
 	.arm
@@ -906,6 +929,9 @@ save_mck:
 
 	at91_plla_disable
 
+	/* Enable low power mode for 2.5V regulator. */
+	at91_2_5V_reg_set_low_power 1
+
 	ldr	tmp3, .pm_mode
 	cmp	tmp3, #AT91_PM_ULP1
 	beq	ulp1_mode
@@ -918,6 +944,9 @@ ulp1_mode:
 	b	ulp_exit
 
 ulp_exit:
+	/* Disable low power mode for 2.5V regulator. */
+	at91_2_5V_reg_set_low_power 0
+
 	ldr	pmc, .pmc_base
 
 	at91_plla_enable
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: Claudiu Beznea <claudiu.beznea@microchip.com>
To: <nicolas.ferre@microchip.com>, <alexandre.belloni@bootlin.com>,
	<ludovic.desroches@microchip.com>, <robh+dt@kernel.org>,
	<linux@armlinux.org.uk>
Cc: <linux-arm-kernel@lists.infradead.org>,
	<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	Claudiu Beznea <claudiu.beznea@microchip.com>
Subject: [PATCH v3 14/24] ARM: at91: pm: add support for 2.5V LDO regulator control
Date: Thu, 15 Apr 2021 13:50:00 +0300	[thread overview]
Message-ID: <20210415105010.569620-15-claudiu.beznea@microchip.com> (raw)
In-Reply-To: <20210415105010.569620-1-claudiu.beznea@microchip.com>

Add support to disable/enable 2.5V LDO regulator when entering/exiting
any ULP mode.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
---
 arch/arm/mach-at91/pm.h         |  1 +
 arch/arm/mach-at91/pm_suspend.S | 29 +++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/arch/arm/mach-at91/pm.h b/arch/arm/mach-at91/pm.h
index 666474088d55..53bdc9000e44 100644
--- a/arch/arm/mach-at91/pm.h
+++ b/arch/arm/mach-at91/pm.h
@@ -13,6 +13,7 @@
 #include <soc/at91/at91sam9_ddrsdr.h>
 #include <soc/at91/at91sam9_sdramc.h>
 #include <soc/at91/sama7-ddr.h>
+#include <soc/at91/sama7-sfrbu.h>
 
 #define AT91_MEMCTRL_MC		0
 #define AT91_MEMCTRL_SDRAMC	1
diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
index 8b0b8619ee8a..9c9e08fd8300 100644
--- a/arch/arm/mach-at91/pm_suspend.S
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -83,6 +83,29 @@ tmp3	.req	r6
 
 	.endm
 
+/**
+ * Set state for 2.5V low power regulator
+ * @ena: 0 - disable regulator
+ *	 1 - enable regulator
+ *
+ * Side effects: overwrites r7, r8, r9, r10
+ */
+	.macro at91_2_5V_reg_set_low_power ena
+#ifdef CONFIG_SOC_SAMA7
+	ldr	r7, .sfrbu
+	mov	r8, #\ena
+	ldr	r9, [r7, #AT91_SFRBU_25LDOCR]
+	orr	r9, r9, #AT91_SFRBU_25LDOCR_LP
+	cmp	r8, #1
+	beq	lp_done_\ena
+	bic	r9, r9, #AT91_SFRBU_25LDOCR_LP
+lp_done_\ena:
+	ldr	r10, =AT91_SFRBU_25LDOCR_LDOANAKEY
+	orr	r9, r9, r10
+	str	r9, [r7, #AT91_SFRBU_25LDOCR]
+#endif
+	.endm
+
 	.text
 
 	.arm
@@ -906,6 +929,9 @@ save_mck:
 
 	at91_plla_disable
 
+	/* Enable low power mode for 2.5V regulator. */
+	at91_2_5V_reg_set_low_power 1
+
 	ldr	tmp3, .pm_mode
 	cmp	tmp3, #AT91_PM_ULP1
 	beq	ulp1_mode
@@ -918,6 +944,9 @@ ulp1_mode:
 	b	ulp_exit
 
 ulp_exit:
+	/* Disable low power mode for 2.5V regulator. */
+	at91_2_5V_reg_set_low_power 0
+
 	ldr	pmc, .pmc_base
 
 	at91_plla_enable
-- 
2.25.1


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  parent reply	other threads:[~2021-04-15 10:51 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-15 10:49 [PATCH v3 00/24] ARM: at91: pm: add support for sama7g5 Claudiu Beznea
2021-04-15 10:49 ` Claudiu Beznea
2021-04-15 10:49 ` [PATCH v3 01/24] ARM: at91: pm: move pm_bu to soc_pm data structure Claudiu Beznea
2021-04-15 10:49   ` Claudiu Beznea
2021-04-15 10:49 ` [PATCH v3 02/24] ARM: at91: pm: move the setup of soc_pm.bu->suspended Claudiu Beznea
2021-04-15 10:49   ` Claudiu Beznea
2021-04-15 10:49 ` [PATCH v3 03/24] ARM: at91: pm: document at91_soc_pm structure Claudiu Beznea
2021-04-15 10:49   ` Claudiu Beznea
2021-04-15 10:49 ` [PATCH v3 04/24] ARM: at91: pm: check for different controllers in at91_pm_modes_init() Claudiu Beznea
2021-04-15 10:49   ` Claudiu Beznea
2021-04-15 10:49 ` [PATCH v3 05/24] ARM: at91: pm: do not initialize pdev Claudiu Beznea
2021-04-15 10:49   ` Claudiu Beznea
2021-04-15 10:49 ` [PATCH v3 06/24] ARM: at91: pm: use r7 instead of tmp1 Claudiu Beznea
2021-04-15 10:49   ` Claudiu Beznea
2021-04-15 10:49 ` [PATCH v3 07/24] ARM: at91: pm: avoid push and pop on stack while memory is in self-refersh Claudiu Beznea
2021-04-15 10:49   ` Claudiu Beznea
2021-04-15 10:49 ` [PATCH v3 08/24] ARM: at91: pm: s/CONFIG_SOC_SAM9X60/CONFIG_HAVE_AT91_SAM9X60_PLL/g Claudiu Beznea
2021-04-15 10:49   ` Claudiu Beznea
2021-04-15 10:49 ` [PATCH v3 09/24] ARM: at91: pm: add support for waiting MCK1..4 Claudiu Beznea
2021-04-15 10:49   ` Claudiu Beznea
2021-04-15 10:49 ` [PATCH v3 10/24] ARM: at91: sfrbu: add sfrbu registers definitions for sama7g5 Claudiu Beznea
2021-04-15 10:49   ` Claudiu Beznea
2021-04-15 10:49 ` [PATCH v3 11/24] ARM: at91: ddr: add registers definitions for sama7g5's ddr Claudiu Beznea
2021-04-15 10:49   ` Claudiu Beznea
2021-04-15 10:49 ` [PATCH v3 12/24] ARM: at91: pm: add self-refresh support for sama7g5 Claudiu Beznea
2021-04-15 10:49   ` Claudiu Beznea
2021-04-15 10:49 ` [PATCH v3 13/24] ARM: at91: pm: add support for MCK1..4 save/restore for ulp modes Claudiu Beznea
2021-04-15 10:49   ` Claudiu Beznea
2021-04-15 10:50 ` Claudiu Beznea [this message]
2021-04-15 10:50   ` [PATCH v3 14/24] ARM: at91: pm: add support for 2.5V LDO regulator control Claudiu Beznea
2021-04-15 10:50 ` [PATCH v3 15/24] ARM: at91: pm: wait for ddr power mode off Claudiu Beznea
2021-04-15 10:50   ` Claudiu Beznea
2021-04-15 10:50 ` [PATCH v3 16/24] dt-bindings: atmel-sysreg: add bindings for sama7g5 Claudiu Beznea
2021-04-15 10:50   ` Claudiu Beznea
2021-04-15 20:59   ` Rob Herring
2021-04-15 20:59     ` Rob Herring
2021-04-15 10:50 ` [PATCH v3 17/24] ARM: at91: pm: add sama7g5 ddr controller Claudiu Beznea
2021-04-15 10:50   ` Claudiu Beznea
2021-04-15 10:50 ` [PATCH v3 18/24] ARM: at91: pm: add sama7g5 ddr phy controller Claudiu Beznea
2021-04-15 10:50   ` Claudiu Beznea
2021-04-15 10:50 ` [PATCH v3 19/24] ARM: at91: pm: save ddr phy calibration data to securam Claudiu Beznea
2021-04-15 10:50   ` Claudiu Beznea
2021-04-15 10:50 ` [PATCH v3 20/24] ARM: at91: pm: add backup mode support for SAMA7G5 Claudiu Beznea
2021-04-15 10:50   ` Claudiu Beznea
2021-04-15 10:50 ` [PATCH v3 21/24] ARM: at91: pm: add sama7g5's pmc Claudiu Beznea
2021-04-15 10:50   ` Claudiu Beznea
2021-04-15 10:50 ` [PATCH v3 22/24] ARM: at91: sama7: introduce sama7 SoC family Claudiu Beznea
2021-04-15 10:50   ` Claudiu Beznea
2021-04-15 10:50 ` [PATCH v3 23/24] ARM: at91: pm: add pm support for SAMA7G5 Claudiu Beznea
2021-04-15 10:50   ` Claudiu Beznea
2021-04-15 10:50 ` [PATCH v3 24/24] ARM: at91: pm: add sama7g5 shdwc Claudiu Beznea
2021-04-15 10:50   ` Claudiu Beznea
2021-07-16 18:03 ` [PATCH v3 00/24] ARM: at91: pm: add support for sama7g5 Nicolas Ferre
2021-07-16 18:03   ` Nicolas Ferre

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