On 10/20/2014 05:56 AM, Grygorii Strashko wrote:
This patch switches Keystone 2 PM code to use Generic PM domains
instead of PM clock domains because of the lack of DT support
for the last.
Reviewed-by: Kevin Hilman <khilman@xxxxxxxxxx>
Signed-off-by: Grygorii Strashko <grygorii.strashko@xxxxxx>
---
.../bindings/power/ti,keystone-powerdomain.txt | 31 ++++++
arch/arm/mach-keystone/Kconfig | 1 +
arch/arm/mach-keystone/pm_domain.c | 112 ++++++++++++++-------
3 files changed, 107 insertions(+), 37 deletions(-)
create mode 100644 Documentation/devicetree/bindings/power/ti,keystone-powerdomain.txt
diff --git a/Documentation/devicetree/bindings/power/ti,keystone-powerdomain.txt b/Documentation/devicetree/bindings/power/ti,keystone-powerdomain.txt
new file mode 100644
index 0000000..4bbf2aa
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/ti,keystone-powerdomain.txt
@@ -0,0 +1,31 @@
+* TI Keystone 2 Generic PM Controller
+
+The TI Keystone 2 Generic PM Controller is responsible for Clock gating
+for each controlled IP module.
+
+Required properties:
+- compatible: Should be "ti,keystone-powerdomain"
+- #power-domain-cells: Should be 0, see below:
+
+The gpc node is a power-controller as documented by the generic power domain
You renamed gpc but missed to fix the comment ? Pls update it.
+bindings in Documentation/devicetree/bindings/power/power_domain.txt.
+
+Example:
+
+ pm_controller: pm-controller {
+ compatible = "ti,keystone-powerdomain";
+ #power-domain-cells = <0>;
+ };
+
+ netcp: netcp@2090000 {
+ reg = <0x2620110 0x8>;
+ reg-names = "efuse";
+ ...
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+ power-domains = <&pm_controller>;
+
+ clocks = <&clkpa>, <&clkcpgmac>, <&chipclk12>;
+ dma-coherent;
+ }
diff --git a/arch/arm/mach-keystone/Kconfig b/arch/arm/mach-keystone/Kconfig
index 98a156a..de43107 100644
--- a/arch/arm/mach-keystone/Kconfig
+++ b/arch/arm/mach-keystone/Kconfig
@@ -9,6 +9,7 @@ config ARCH_KEYSTONE
select COMMON_CLK_KEYSTONE
select ARCH_SUPPORTS_BIG_ENDIAN
select ZONE_DMA if ARM_LPAE
+ select PM_GENERIC_DOMAINS if PM
help
Support for boards based on the Texas Instruments Keystone family of
SoCs.
diff --git a/arch/arm/mach-keystone/pm_domain.c b/arch/arm/mach-keystone/pm_domain.c
index ca79dda..d58759d 100644
--- a/arch/arm/mach-keystone/pm_domain.c
+++ b/arch/arm/mach-keystone/pm_domain.c
@@ -12,69 +12,107 @@
* version 2, as published by the Free Software Foundation.
*/
+#include <linux/clk.h>
#include <linux/init.h>
-#include <linux/pm_runtime.h>
#include <linux/pm_clock.h>
+#include <linux/pm_domain.h>
#include <linux/platform_device.h>
-#include <linux/clk-provider.h>
#include <linux/of.h>
-#ifdef CONFIG_PM_RUNTIME
-static int keystone_pm_runtime_suspend(struct device *dev)
+#ifdef CONFIG_PM_GENERIC_DOMAINS
+
+struct keystone_domain {
+ struct generic_pm_domain genpd;
+ struct device *dev;
+};
+
+void keystone_pm_domain_attach_dev(struct device *dev)
{
+ struct clk *clk;
int ret;
+ int i = 0;
dev_dbg(dev, "%s\n", __func__);
- ret = pm_generic_runtime_suspend(dev);
- if (ret)
- return ret;
-
- ret = pm_clk_suspend(dev);
+ ret = pm_clk_create(dev);
if (ret) {
- pm_generic_runtime_resume(dev);
- return ret;
+ dev_err(dev, "pm_clk_create failed %d\n", ret);
+ return;
+ };
+
+ while ((clk = of_clk_get(dev->of_node, i++)) && !IS_ERR(clk)) {
+ ret = pm_clk_add_clk(dev, clk);
+ if (ret) {
+ dev_err(dev, "pm_clk_add_clk failed %d\n", ret);
+ goto clk_err;
+ };
}
- return 0;
+ if (!IS_ENABLED(CONFIG_PM_RUNTIME)) {
Can we not okkup two seperate callbacks instead of above check ?
I don't like this CONFIG check here. Its slightly better version of
ifdef in middle of the code.
Regards,
Santosh
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