linux-kernel - [PATCH v2.0 1/2] pm: at91: add the PM initialization for the sama5d3 and sama5d4

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Message-ID: <1425873428-8292-1-git-send-email-wenyou.yang@atmel.com>
Date:	Mon, 9 Mar 2015 11:57:08 +0800
From:	Wenyou Yang <wenyou.yang@...el.com>
To:	<nicolas.ferre@...el.com>, <linux@....linux.org.uk>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>,
	<alexandre.belloni@...e-electrons.com>,
	<sylvain.rochet@...secur.com>, <peda@...ntia.se>,
	<sergei.shtylyov@...entembedded.com>, <linux@...im.org.za>,
	<wenyou.yang@...el.com>
Subject: [PATCH v2.0 1/2] pm: at91: add the PM initialization for the sama5d3 and sama5d4

To get the mpddrc peripheral id from the PM initialization,
which will be used to disable mpddrc'c clock during suspending.

Signed-off-by: Wenyou Yang <wenyou.yang@...el.com>
---
 arch/arm/mach-at91/generic.h              |    4 ++++
 arch/arm/mach-at91/include/mach/sama5d3.h |    1 +
 arch/arm/mach-at91/include/mach/sama5d4.h |    5 +++++
 arch/arm/mach-at91/pm.c                   |   21 +++++++++++++++++++++
 arch/arm/mach-at91/sama5.c                |    8 +++++++-
 5 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-at91/generic.h b/arch/arm/mach-at91/generic.h
index 583369f..e12f6a6 100644
--- a/arch/arm/mach-at91/generic.h
+++ b/arch/arm/mach-at91/generic.h
@@ -34,11 +34,15 @@ extern void __init at91rm9200_pm_init(void);
 extern void __init at91sam9260_pm_init(void);
 extern void __init at91sam9g45_pm_init(void);
 extern void __init at91sam9x5_pm_init(void);
+extern void __init sam5d3_pm_init(void);
+extern void __init sam5d4_pm_init(void);
 #else
 static inline void __init at91rm9200_pm_init(void) { }
 static inline void __init at91sam9260_pm_init(void) { }
 static inline void __init at91sam9g45_pm_init(void) { }
 static inline void __init at91sam9x5_pm_init(void) { }
+static void __init sam5d3_pm_init(void) {}
+static void __init sam5d4_pm_init(void) {}
 #endif
 
 #endif /* _AT91_GENERIC_H */
diff --git a/arch/arm/mach-at91/include/mach/sama5d3.h b/arch/arm/mach-at91/include/mach/sama5d3.h
index 25613d8..5a383d8 100644
--- a/arch/arm/mach-at91/include/mach/sama5d3.h
+++ b/arch/arm/mach-at91/include/mach/sama5d3.h
@@ -63,6 +63,7 @@
 #define SAMA5D3_ID_TDES		44	/* Triple Data Encryption Standard */
 #define SAMA5D3_ID_TRNG		45	/* True Random Generator Number */
 #define SAMA5D3_ID_IRQ0		47	/* Advanced Interrupt Controller (IRQ0) */
+#define SAMA5D3_ID_MPDDRC	49	/* MPDDR controller */
 
 /*
  * User Peripheral physical base addresses.
diff --git a/arch/arm/mach-at91/include/mach/sama5d4.h b/arch/arm/mach-at91/include/mach/sama5d4.h
index f256a45..e45f1b8 100644
--- a/arch/arm/mach-at91/include/mach/sama5d4.h
+++ b/arch/arm/mach-at91/include/mach/sama5d4.h
@@ -14,6 +14,11 @@
 #define SAMA5D4_H
 
 /*
+ * Peripheral identifiers/interrupts.
+ */
+#define SAMA5D4_ID_MPDDRC	16	/* MPDDR controller */
+
+/*
  * User Peripheral physical base addresses.
  */
 #define SAMA5D4_BASE_USART3	0xfc00c000 /* (USART3 non-secure) Base Address */
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index ac947cd..e162bdf 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -41,6 +41,8 @@
 static struct {
 	unsigned long uhp_udp_mask;
 	int memctrl;
+	unsigned int ddrc_pid;
+	bool is_sama5d4;
 } at91_pm_data;
 
 void __iomem *at91_ramc_base[2];
@@ -350,3 +352,22 @@ void __init at91sam9x5_pm_init(void)
 	at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
 	return at91_pm_init();
 }
+
+void __init sam5d3_pm_init(void)
+{
+	at91_dt_ramc();
+	at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
+	at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
+	at91_pm_data.ddrc_pid = SAMA5D3_ID_MPDDRC;
+	return at91_pm_init();
+}
+
+void __init sam5d4_pm_init(void)
+{
+	at91_dt_ramc();
+	at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
+	at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
+	at91_pm_data.ddrc_pid = SAMA5D4_ID_MPDDRC;
+	at91_pm_data.is_sama5d4 = true;
+	return at91_pm_init();
+}
diff --git a/arch/arm/mach-at91/sama5.c b/arch/arm/mach-at91/sama5.c
index 03dcb44..f0641ba 100644
--- a/arch/arm/mach-at91/sama5.c
+++ b/arch/arm/mach-at91/sama5.c
@@ -102,10 +102,16 @@ static const char *sama5_alt_dt_board_compat[] __initconst = {
 	NULL
 };
 
+static void __init sama5d4_dt_device_init(void)
+{
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+	sam5d4_pm_init();
+}
+
 DT_MACHINE_START(sama5_alt_dt, "Atmel SAMA5")
 	/* Maintainer: Atmel */
 	.map_io		= sama5_alt_map_io,
-	.init_machine	= sama5_dt_device_init,
+	.init_machine	= sama5d4_dt_device_init,
 	.dt_compat	= sama5_alt_dt_board_compat,
 	.l2c_aux_mask	= ~0UL,
 MACHINE_END
-- 
1.7.9.5

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