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ipq806x: add support for RPM message RAM

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Signed-off-by: Pavel Kubelun <be.dissent@gmail.com>
This commit is contained in:
Pavel Kubelun 2016-11-06 16:22:22 +03:00 committed by John Crispin
parent 07d0c1b947
commit 77b6bfc2f5
4 changed files with 150 additions and 0 deletions
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3
target/linux/ipq806x/files/arch/arm/boot/dts/qcom-ipq8065.dtsi
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@ -224,6 +224,9 @@
#address-cells = <1>;
#size-cells = <0>;
clocks = <&gcc RPM_MSG_RAM_H_CLK>;
clock-names = "ram";
rpmcc: clock-controller {
compatible = "qcom,rpmcc-ipq806x", "qcom,rpmcc";
#clock-cells = <1>;

29
target/linux/ipq806x/patches-4.4/005-mfd-qcom_rpm-Add-missing-of_node_put-after-calling-of_parse_phandle.patch Normal file
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@ -0,0 +1,29 @@
From 349290fc9e761aaef6d6882721189f668ec5ff49 Mon Sep 17 00:00:00 2001
From: Peter Chen <peter.chen@nxp.com>
Date: Fri, 15 Jul 2016 17:38:46 +0800
Subject: mfd: qcom_rpm: Add missing of_node_put after calling of_parse_phandle
of_node_put needs to be called when the device node which is got
from of_parse_phandle has finished using.
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/mfd/qcom_rpm.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/mfd/qcom_rpm.c b/drivers/mfd/qcom_rpm.c
index a74210d..d330071 100644
--- a/drivers/mfd/qcom_rpm.c
+++ b/drivers/mfd/qcom_rpm.c
@@ -589,6 +589,7 @@ static int qcom_rpm_probe(struct platform_device *pdev)
}
rpm->ipc_regmap = syscon_node_to_regmap(syscon_np);
+ of_node_put(syscon_np);
if (IS_ERR(rpm->ipc_regmap))
return PTR_ERR(rpm->ipc_regmap);
--
cgit v0.12

94
target/linux/ipq806x/patches-4.4/006-mfd-qcom_rpm-Handle-message-RAM-clock.patch Normal file
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@ -0,0 +1,94 @@
From 3526403353c2a1b94c3181f900582626d23c339b Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Thu, 18 Aug 2016 20:40:45 +0200
Subject: mfd: qcom_rpm: Handle message RAM clock
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
The MSM8660, APQ8060, IPQ806x and MSM8960 have a GCC clock
to the message RAM used by the RPM. This needs to be enabled
for messages to pass through. This is a crude solution that
simply prepare/enable at probe() and disable/unprepare
at remove(). More elaborate PM is probably possible to
add later.
The construction uses IS_ERR() to gracefully handle the
platforms that do not provide a message RAM clock. It will
bail out of probe only if the clock is hitting a probe
deferral situation.
Of course this requires the proper device tree set-up:
rpm: rpm@104000 {
compatible = "qcom,rpm-msm8660";
clocks = <&gcc RPM_MSG_RAM_H_CLK>;
clock-names = "ram";
...
};
I have provided this in the MSM8660 device tree, and will
provide patches for the other targets.
Cc: Björn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/mfd/qcom_rpm.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/mfd/qcom_rpm.c b/drivers/mfd/qcom_rpm.c
index d330071..52fafea 100644
--- a/drivers/mfd/qcom_rpm.c
+++ b/drivers/mfd/qcom_rpm.c
@@ -21,6 +21,7 @@
#include <linux/mfd/qcom_rpm.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
+#include <linux/clk.h>
#include <dt-bindings/mfd/qcom-rpm.h>
@@ -48,6 +49,7 @@ struct qcom_rpm {
struct regmap *ipc_regmap;
unsigned ipc_offset;
unsigned ipc_bit;
+ struct clk *ramclk;
struct completion ack;
struct mutex lock;
@@ -552,6 +554,20 @@ static int qcom_rpm_probe(struct platform_device *pdev)
mutex_init(&rpm->lock);
init_completion(&rpm->ack);
+ /* Enable message RAM clock */
+ rpm->ramclk = devm_clk_get(&pdev->dev, "ram");
+ if (IS_ERR(rpm->ramclk)) {
+ ret = PTR_ERR(rpm->ramclk);
+ if (ret == -EPROBE_DEFER)
+ return ret;
+ /*
+ * Fall through in all other cases, as the clock is
+ * optional. (Does not exist on all platforms.)
+ */
+ rpm->ramclk = NULL;
+ }
+ clk_prepare_enable(rpm->ramclk); /* Accepts NULL */
+
irq_ack = platform_get_irq_byname(pdev, "ack");
if (irq_ack < 0) {
dev_err(&pdev->dev, "required ack interrupt missing\n");
@@ -672,7 +688,11 @@ static int qcom_rpm_probe(struct platform_device *pdev)
static int qcom_rpm_remove(struct platform_device *pdev)
{
+ struct qcom_rpm *rpm = dev_get_drvdata(&pdev->dev);
+
of_platform_depopulate(&pdev->dev);
+ clk_disable_unprepare(rpm->ramclk);
+
return 0;
}
--
cgit v0.12

24
target/linux/ipq806x/patches-4.4/306-add-RPM-msg-RAM-into-DT.patch Normal file
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@ -0,0 +1,24 @@
From 9bf6b333d6a4d3a3ef0d3fc7ca0becd008c81820 Mon Sep 17 00:00:00 2001
From: Pavel Kubelun <be.dissent@gmail.com>
Date: Sun, 6 Nov 2016 19:12:46 +0300
Subject: [PATCH] ipq806x: add RPM msg RAM into DT
Signed-off-by: Pavel Kubelun <be.dissent@gmail.com>
---
arch/arm/boot/dts/qcom-ipq8064.dtsi | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm/boot/dts/qcom-ipq8064.dtsi b/arch/arm/boot/dts/qcom-ipq8064.dtsi
index 6b06118..d1ff9d0 100644
--- a/arch/arm/boot/dts/qcom-ipq8064.dtsi
+++ b/arch/arm/boot/dts/qcom-ipq8064.dtsi
@@ -184,6 +184,9 @@
"err",
"wakeup";
+ clocks = <&gcc RPM_MSG_RAM_H_CLK>;
+ clock-names = "ram";
+
#address-cells = <1>;
#size-cells = <0>;