KumiSystems/openwrtv4
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

ipq806x: remove scm firmware clocks

Browse source 
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>
This commit is contained in:
Pavel Kubelun 2017-03-19 04:24:45 +03:00 committed by John Crispin
parent 312b9dcd65
commit 0d89650db1
2 changed files with 167 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
target/linux/ipq806x/files-4.9/arch/arm/boot/dts/qcom-ipq8064.dtsi
View file

@ -206,10 +206,7 @@
firmware {
scm {
compatible = "qcom,scm-apq8064";
clocks = <&rpmcc RPM_DAYTONA_FABRIC_CLK>;
clock-names = "core";
compatible = "qcom,scm-ipq806x";
};
};

166
target/linux/ipq806x/patches-4.9/0072-ipq-scm-TZ-don-t-need-clock-to-be-enabled-disabled-for-ipq.patch Normal file
View file

@ -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",