ipq806x: remove scm firmware clocks

At the moment as a workaround definition for scm firmware in DT is used as if it is
apq8064 board. This leads to incomplete scm firmware initialization and as a result
cpuidle driver fails to configure.

By design unlike other qcom boards ipq do not use clocks to connect to scm.

Considering this we're removing from DT and scm driver clocks for ipq boards.

As a result cpuidle does not produce errors about failed configuration anymore.

Signed-off-by: Pavel Kubelun <be.dissent@gmail.com>

1 files changed, 166 insertions, 0 deletions

diff --git a/target/linux/ipq806x/patches-4.9/0072-ipq-scm-TZ-don-t-need-clock-to-be-enabled-disabled-for-ipq.patch b/target/linux/ipq806x/patches-4.9/0072-ipq-scm-TZ-don-t-need-clock-to-be-enabled-disabled-for-ipq.patch
new file mode 100644
index 0000000000..4f0e544ab6
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.9/0072-ipq-scm-TZ-don-t-need-clock-to-be-enabled-disabled-for-ipq.patch
@@ -0,0 +1,166 @@
+From 0fb08a02baf5114fd3bdbc5aa92d6a6cd6d5ef3f Mon Sep 17 00:00:00 2001
+From: Manoharan Vijaya Raghavan <mraghava@codeaurora.org>
+Date: Tue, 24 Jan 2017 20:58:46 +0530
+Subject: ipq: scm: TZ don't need clock to be enabled/disabled for ipq
+
+When SCM was made as a platform driver, clock management was
+addedfor firmware calls. This is not required for IPQ.
+
+Change-Id: I3d29fafe0266e51f708f2718bab03907078b0f4d
+Signed-off-by: Manoharan Vijaya Raghavan <mraghava@codeaurora.org>
+---
+ drivers/firmware/qcom_scm.c | 87 +++++++++++++++++++++++++++++----------------
+ 1 file changed, 57 insertions(+), 30 deletions(-)
+
+(limited to 'drivers/firmware/qcom_scm.c')
+
+--- a/drivers/firmware/qcom_scm.c
++++ b/drivers/firmware/qcom_scm.c
+@@ -28,12 +28,15 @@
+ 
+ #include "qcom_scm.h"
+ 
++#define SCM_NOCLK 1
++
+ struct qcom_scm {
+ 	struct device *dev;
+ 	struct clk *core_clk;
+ 	struct clk *iface_clk;
+ 	struct clk *bus_clk;
+ 	struct reset_controller_dev reset;
++	int is_clkdisabled;
+ };
+ 
+ static struct qcom_scm *__scm;
+@@ -42,6 +45,9 @@ static int qcom_scm_clk_enable(void)
+ {
+ 	int ret;
+ 
++	if (__scm->is_clkdisabled)
++		return 0;
++
+ 	ret = clk_prepare_enable(__scm->core_clk);
+ 	if (ret)
+ 		goto bail;
+@@ -66,6 +72,9 @@ bail:
+ 
+ static void qcom_scm_clk_disable(void)
+ {
++	if (__scm->is_clkdisabled)
++		return;
++
+ 	clk_disable_unprepare(__scm->core_clk);
+ 	clk_disable_unprepare(__scm->iface_clk);
+ 	clk_disable_unprepare(__scm->bus_clk);
+@@ -320,37 +329,61 @@ bool qcom_scm_is_available(void)
+ }
+ EXPORT_SYMBOL(qcom_scm_is_available);
+ 
++static const struct of_device_id qcom_scm_dt_match[] = {
++	{ .compatible = "qcom,scm-apq8064",},
++	{ .compatible = "qcom,scm-msm8660",},
++	{ .compatible = "qcom,scm-msm8960",},
++	{ .compatible = "qcom,scm-ipq807x", .data = (void *)SCM_NOCLK },
++	{ .compatible = "qcom,scm-ipq806x", .data = (void *)SCM_NOCLK },
++	{ .compatible = "qcom,scm-ipq40xx", .data = (void *)SCM_NOCLK },
++	{ .compatible = "qcom,scm-msm8960",},
++	{ .compatible = "qcom,scm-msm8960",},
++	{ .compatible = "qcom,scm",},
++	{}
++};
++
+ static int qcom_scm_probe(struct platform_device *pdev)
+ {
+ 	struct qcom_scm *scm;
++	const struct of_device_id *id;
+ 	int ret;
+ 
+ 	scm = devm_kzalloc(&pdev->dev, sizeof(*scm), GFP_KERNEL);
+ 	if (!scm)
+ 		return -ENOMEM;
+ 
+-	scm->core_clk = devm_clk_get(&pdev->dev, "core");
+-	if (IS_ERR(scm->core_clk)) {
+-		if (PTR_ERR(scm->core_clk) == -EPROBE_DEFER)
+-			return PTR_ERR(scm->core_clk);
++	id = of_match_device(qcom_scm_dt_match, &pdev->dev);
++	if (id)
++		scm->is_clkdisabled = (unsigned int)id->data;
++	else
++		scm->is_clkdisabled = 0;
++
++	if (!(scm->is_clkdisabled)) {
++
++		scm->core_clk = devm_clk_get(&pdev->dev, "core");
++		if (IS_ERR(scm->core_clk)) {
++			if (PTR_ERR(scm->core_clk) == -EPROBE_DEFER)
++				return PTR_ERR(scm->core_clk);
+ 
+-		scm->core_clk = NULL;
+-	}
+-
+-	if (of_device_is_compatible(pdev->dev.of_node, "qcom,scm")) {
+-		scm->iface_clk = devm_clk_get(&pdev->dev, "iface");
+-		if (IS_ERR(scm->iface_clk)) {
+-			if (PTR_ERR(scm->iface_clk) != -EPROBE_DEFER)
+-				dev_err(&pdev->dev, "failed to acquire iface clk\n");
+-			return PTR_ERR(scm->iface_clk);
++			scm->core_clk = NULL;
+ 		}
+ 
+-		scm->bus_clk = devm_clk_get(&pdev->dev, "bus");
+-		if (IS_ERR(scm->bus_clk)) {
+-			if (PTR_ERR(scm->bus_clk) != -EPROBE_DEFER)
+-				dev_err(&pdev->dev, "failed to acquire bus clk\n");
+-			return PTR_ERR(scm->bus_clk);
++		if (of_device_is_compatible(pdev->dev.of_node, "qcom,scm")) {
++			scm->iface_clk = devm_clk_get(&pdev->dev, "iface");
++			if (IS_ERR(scm->iface_clk)) {
++				if (PTR_ERR(scm->iface_clk) != -EPROBE_DEFER)
++					dev_err(&pdev->dev, "failed to acquire iface clk\n");
++				return PTR_ERR(scm->iface_clk);
++			}
++
++			scm->bus_clk = devm_clk_get(&pdev->dev, "bus");
++			if (IS_ERR(scm->bus_clk)) {
++				if (PTR_ERR(scm->bus_clk) != -EPROBE_DEFER)
++					dev_err(&pdev->dev, "failed to acquire bus clk\n");
++				return PTR_ERR(scm->bus_clk);
++			}
+ 		}
++
+ 	}
+ 
+ 	scm->reset.ops = &qcom_scm_pas_reset_ops;
+@@ -358,10 +391,12 @@ static int qcom_scm_probe(struct platfor
+ 	scm->reset.of_node = pdev->dev.of_node;
+ 	reset_controller_register(&scm->reset);
+ 
+-	/* vote for max clk rate for highest performance */
+-	ret = clk_set_rate(scm->core_clk, INT_MAX);
+-	if (ret)
+-		return ret;
++	if (!(scm->is_clkdisabled)) {
++		/* vote for max clk rate for highest performance */
++		ret = clk_set_rate(scm->core_clk, INT_MAX);
++		if (ret)
++			return ret;
++	}
+ 
+ 	__scm = scm;
+ 	__scm->dev = &pdev->dev;
+@@ -371,14 +406,6 @@ static int qcom_scm_probe(struct platfor
+ 	return 0;
+ }
+ 
+-static const struct of_device_id qcom_scm_dt_match[] = {
+-	{ .compatible = "qcom,scm-apq8064",},
+-	{ .compatible = "qcom,scm-msm8660",},
+-	{ .compatible = "qcom,scm-msm8960",},
+-	{ .compatible = "qcom,scm",},
+-	{}
+-};
+-
+ static struct platform_driver qcom_scm_driver = {
+ 	.driver = {
+ 		.name	= "qcom_scm",