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From: Wenyou Yang <wenyou.yang@atmel.com>
To: <nicolas.ferre@atmel.com>, <linux@arm.linux.org.uk>
Cc: <linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>,
	<alexandre.belloni@free-electrons.com>,
	<sylvain.rochet@finsecur.com>, <peda@axentia.se>,
	<wenyou.yang@atmel.com>, <Patrice.VILCHEZ@atmel.com>
Subject: [PATCH 6/7] pm: at91: add achieve the mpddrc peripheral ID and the DDR clock ID support
Date: Mon, 26 Jan 2015 18:08:16 +0800	[thread overview]
Message-ID: <1422266896-24666-1-git-send-email-wenyou.yang@atmel.com> (raw)
In-Reply-To: <1422266617-24381-1-git-send-email-wenyou.yang@atmel.com>

The patch achieves the mpddr controller peripheral ID
and the DDR clock ID from the dts file.

They will be used in the future to disable the mpddr controller'c clock
the and DDR clock to decrease the power consumption during suspending.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
---
 arch/arm/mach-at91/generic.h |    2 ++
 arch/arm/mach-at91/setup.c   |   24 ++++++++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/arch/arm/mach-at91/generic.h b/arch/arm/mach-at91/generic.h
index 41796bf..3c72a3e 100644
--- a/arch/arm/mach-at91/generic.h
+++ b/arch/arm/mach-at91/generic.h
@@ -47,6 +47,8 @@ void __init at91_sam9x5_pm_init(void) { }
 struct at91_pm_struct {
 	unsigned long uhp_udp_mask;
 	int memctrl;
+	u32 mpddrc_id[2];
+	u32 ddrck_id;
 };
 
 #endif /* _AT91_GENERIC_H */
diff --git a/arch/arm/mach-at91/setup.c b/arch/arm/mach-at91/setup.c
index 7924663..a306f95 100644
--- a/arch/arm/mach-at91/setup.c
+++ b/arch/arm/mach-at91/setup.c
@@ -363,6 +363,27 @@ void __init at91_ioremap_matrix(u32 base_addr)
 		panic(pr_fmt("Impossible to ioremap at91_matrix_base\n"));
 }
 
+static u32 at91_of_get_ddr_id(struct device_node *np, char *name)
+{
+	struct of_phandle_args clkspec;
+	u32 id;
+	int index;
+	int rc;
+
+	index = of_property_match_string(np, "clock-names", name);
+	rc = of_parse_phandle_with_args(np, "clocks", "#clock-cells", index, &clkspec);
+	if (rc)
+		return 0;
+
+	rc = of_property_read_u32(clkspec.np, "reg", &id);
+	if (rc)
+		return 0;
+
+	of_node_put(clkspec.np);
+
+	return id;
+}
+
 struct at91_ramc_of_data {
 	u8 ramc_type;
 };
@@ -400,6 +421,9 @@ static void at91_dt_ramc(void)
 		of_data = of_id->data;
 		at91_pm_data.memctrl = of_data->ramc_type;
 
+		at91_pm_data.mpddrc_id[idx] = at91_of_get_ddr_id(np, "mpddr");
+		at91_pm_data.ddrck_id = at91_of_get_ddr_id(np, "ddrck");
+
 		idx++;
 	}
 
-- 
1.7.9.5


  parent reply	other threads:[~2015-01-26 10:10 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-26 10:03 [PATCH 0/7] AT91 pm improvements for 3.20 Wenyou Yang
2015-01-26 10:04 ` [PATCH 1/7] pm: at91: achieve the memory controller's type from the dts file Wenyou Yang
2015-01-26 10:06 ` [PATCH 2/7] pm: at91: pm_suspend: add the WFI support for ARMv7 Wenyou Yang
2015-01-26 13:05   ` Sergei Shtylyov
2015-01-27  4:44     ` Yang, Wenyou
2015-01-28 11:25   ` Lorenzo Pieralisi
2015-01-29  2:36     ` Yang, Wenyou
2015-01-29 12:22       ` Lorenzo Pieralisi
2015-01-30  7:23         ` Yang, Wenyou
2015-01-30 10:17           ` Lorenzo Pieralisi
2015-01-30 10:44           ` Lorenzo Pieralisi
2015-01-26 10:06 ` [PATCH 3/7] pm: at91: pm_suspend: MOR register KEY was missing Wenyou Yang
2015-01-26 10:07 ` [PATCH 4/7] ARM: at91: enable the L2 Cache controller Wenyou Yang
2015-01-26 11:46   ` Mark Rutland
2015-01-26 12:45   ` Russell King - ARM Linux
2015-01-26 22:36   ` Alexandre Belloni
2015-01-27  5:11     ` Yang, Wenyou
2015-01-26 10:07 ` [PATCH 5/7] pm: at91: add disable/enable the L1/L2 cache while suspend/resume Wenyou Yang
2015-01-26 10:08 ` Wenyou Yang [this message]
2015-01-26 11:49   ` [PATCH 6/7] pm: at91: add achieve the mpddrc peripheral ID and the DDR clock ID support Mark Rutland
2015-01-27  5:24     ` Yang, Wenyou
2015-01-26 10:08 ` [PATCH 7/7] pm: at91: add disable/enable the mpddrc's clock and DDR clock support Wenyou Yang

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