lkml.org 
[lkml]   [2014]   [Oct]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2 2/3] ARM: keystone: pm: switch to use generic pm domains
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@linaro.org>
> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
> ---
> .../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



\
 
 \ /
  Last update: 2014-10-21 20:41    [W:0.144 / U:0.096 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site