diff mbox

[3/3] clk: rockchip: do not gate the efuse256 clock

Message ID 1439176963-8969-4-git-send-email-zhengsq@rock-chips.com (mailing list archive)
State New, archived
Headers show

Commit Message

Shunqian Zheng Aug. 10, 2015, 3:22 a.m. UTC 
From: ZhengShunQian <zhengsq@rock-chips.com>

Always enable the clock of efuse256. Base on the nvmem framework,
it seems like there is not a good way to enable the clock
when actual needed.

Signed-off-by: ZhengShunQian <zhengsq@rock-chips.com>
---
 drivers/clk/rockchip/clk-rk3288.c      | 2 +-
 include/dt-bindings/clock/rk3288-cru.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

Comments

Heiko Stuebner Aug. 10, 2015, 8:08 a.m. UTC | #1 
Hi,

Am Montag, 10. August 2015, 11:22:43 schrieb Shunqian Zheng:
> From: ZhengShunQian <zhengsq@rock-chips.com>
> 
> Always enable the clock of efuse256. Base on the nvmem framework,
> it seems like there is not a good way to enable the clock
> when actual needed.
> 
> Signed-off-by: ZhengShunQian <zhengsq@rock-chips.com>

actually regmap already provides a handle to have a clock for mmio-based
regmaps ... take a look at devm_regmap_init_mmio_clk() [0]

If this doesn't help, you can also simply clk_get and clk_prepare_enable the
clock in your rockchip_efuse_probe() and disable in rockchip_efuse_remove().


But I certainly don't want to extend the range of clocks magically staying
enabled through the ccf.


Heiko


[0] http://lxr.free-electrons.com/source/drivers/base/regmap/regmap-mmio.c#L336


> ---
>  drivers/clk/rockchip/clk-rk3288.c      | 2 +-
>  include/dt-bindings/clock/rk3288-cru.h | 1 +
>  2 files changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/clk/rockchip/clk-rk3288.c
> b/drivers/clk/rockchip/clk-rk3288.c index 0df5bae..84d9218 100644
> --- a/drivers/clk/rockchip/clk-rk3288.c
> +++ b/drivers/clk/rockchip/clk-rk3288.c
> @@ -647,7 +647,7 @@ static struct rockchip_clk_branch rk3288_clk_branches[]
> __initdata = { GATE(0, "pclk_efuse_1024", "pclk_cpu", 0,
> RK3288_CLKGATE_CON(11), 2, GFLAGS), GATE(PCLK_TZPC, "pclk_tzpc",
> "pclk_cpu", 0, RK3288_CLKGATE_CON(11), 3, GFLAGS), GATE(PCLK_UART2,
> "pclk_uart2", "pclk_cpu", 0, RK3288_CLKGATE_CON(11), 9, GFLAGS), -	GATE(0,
> "pclk_efuse_256", "pclk_cpu", 0, RK3288_CLKGATE_CON(11), 10, GFLAGS),
> +	GATE(PCLK_EFUSE256, "pclk_efuse_256", "pclk_cpu", CLK_IGNORE_UNUSED,
> RK3288_CLKGATE_CON(11), 10, GFLAGS), GATE(PCLK_RKPWM, "pclk_rkpwm",
> "pclk_cpu", CLK_IGNORE_UNUSED, RK3288_CLKGATE_CON(11), 11, GFLAGS),
> 
>  	/* ddrctrl [DDR Controller PHY clock] gates */
> diff --git a/include/dt-bindings/clock/rk3288-cru.h
> b/include/dt-bindings/clock/rk3288-cru.h index c719aac..ab74d5e 100644
> --- a/include/dt-bindings/clock/rk3288-cru.h
> +++ b/include/dt-bindings/clock/rk3288-cru.h
> @@ -164,6 +164,7 @@
>  #define PCLK_DDRUPCTL1		366
>  #define PCLK_PUBL1		367
>  #define PCLK_WDT		368
> +#define PCLK_EFUSE256		369
> 
>  /* hclk gates */
>  #define HCLK_GPS		448
Shunqian Zheng Aug. 10, 2015, 8:37 a.m. UTC | #2 
Hi Heiko,

On 2015?08?10? 16:08, Heiko Stübner wrote:
> Hi,
>
> Am Montag, 10. August 2015, 11:22:43 schrieb Shunqian Zheng:
>> From: ZhengShunQian <zhengsq@rock-chips.com>
>>
>> Always enable the clock of efuse256. Base on the nvmem framework,
>> it seems like there is not a good way to enable the clock
>> when actual needed.
>>
>> Signed-off-by: ZhengShunQian <zhengsq@rock-chips.com>
> actually regmap already provides a handle to have a clock for mmio-based
> regmaps ... take a look at devm_regmap_init_mmio_clk() [0]
Srinivas also suggested devm_regmap_init_mmio_clk() too, but unfortunately
mmio uses its own .read/.write callback that not suitable for eFuse.
>
> If this doesn't help, you can also simply clk_get and clk_prepare_enable the
> clock in your rockchip_efuse_probe() and disable in rockchip_efuse_remove().
Sure, I will use this way.
Thank you!!
>
>
> But I certainly don't want to extend the range of clocks magically staying
> enabled through the ccf.
>
>
> Heiko
>
>
> [0] http://lxr.free-electrons.com/source/drivers/base/regmap/regmap-mmio.c#L336
>
>
>> ---
>>   drivers/clk/rockchip/clk-rk3288.c      | 2 +-
>>   include/dt-bindings/clock/rk3288-cru.h | 1 +
>>   2 files changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/clk/rockchip/clk-rk3288.c
>> b/drivers/clk/rockchip/clk-rk3288.c index 0df5bae..84d9218 100644
>> --- a/drivers/clk/rockchip/clk-rk3288.c
>> +++ b/drivers/clk/rockchip/clk-rk3288.c
>> @@ -647,7 +647,7 @@ static struct rockchip_clk_branch rk3288_clk_branches[]
>> __initdata = { GATE(0, "pclk_efuse_1024", "pclk_cpu", 0,
>> RK3288_CLKGATE_CON(11), 2, GFLAGS), GATE(PCLK_TZPC, "pclk_tzpc",
>> "pclk_cpu", 0, RK3288_CLKGATE_CON(11), 3, GFLAGS), GATE(PCLK_UART2,
>> "pclk_uart2", "pclk_cpu", 0, RK3288_CLKGATE_CON(11), 9, GFLAGS), -	GATE(0,
>> "pclk_efuse_256", "pclk_cpu", 0, RK3288_CLKGATE_CON(11), 10, GFLAGS),
>> +	GATE(PCLK_EFUSE256, "pclk_efuse_256", "pclk_cpu", CLK_IGNORE_UNUSED,
>> RK3288_CLKGATE_CON(11), 10, GFLAGS), GATE(PCLK_RKPWM, "pclk_rkpwm",
>> "pclk_cpu", CLK_IGNORE_UNUSED, RK3288_CLKGATE_CON(11), 11, GFLAGS),
>>
>>   	/* ddrctrl [DDR Controller PHY clock] gates */
>> diff --git a/include/dt-bindings/clock/rk3288-cru.h
>> b/include/dt-bindings/clock/rk3288-cru.h index c719aac..ab74d5e 100644
>> --- a/include/dt-bindings/clock/rk3288-cru.h
>> +++ b/include/dt-bindings/clock/rk3288-cru.h
>> @@ -164,6 +164,7 @@
>>   #define PCLK_DDRUPCTL1		366
>>   #define PCLK_PUBL1		367
>>   #define PCLK_WDT		368
>> +#define PCLK_EFUSE256		369
>>
>>   /* hclk gates */
>>   #define HCLK_GPS		448
>
> _______________________________________________
> Linux-rockchip mailing list
> Linux-rockchip@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-rockchip
>
>
Srinivas Kandagatla Aug. 10, 2015, 8:48 a.m. UTC | #3 
On 10/08/15 04:22, Shunqian Zheng wrote:
> From: ZhengShunQian <zhengsq@rock-chips.com>
>
> Always enable the clock of efuse256. Base on the nvmem framework,
> it seems like there is not a good way to enable the clock
> when actual needed.
No, thats not true. NVMEM does not mandate anything, it give more 
flexibity to providers instead.
What ever this patch is in wrong direction to solve the issue.

We have two options to use clocks for providers, one use 
devm_regmap_init_mmio_clk() Or
Have your own context structure like
struct rockchip_context{
	void __iomem *base
	struct clk *efuse_clk;
};

Then in read/write manage the clock as required.

--srini
>
> Signed-off-by: ZhengShunQian <zhengsq@rock-chips.com>
> ---
>   drivers/clk/rockchip/clk-rk3288.c      | 2 +-
>   include/dt-bindings/clock/rk3288-cru.h | 1 +
>   2 files changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/clk/rockchip/clk-rk3288.c b/drivers/clk/rockchip/clk-rk3288.c
> index 0df5bae..84d9218 100644
> --- a/drivers/clk/rockchip/clk-rk3288.c
> +++ b/drivers/clk/rockchip/clk-rk3288.c
> @@ -647,7 +647,7 @@ static struct rockchip_clk_branch rk3288_clk_branches[] __initdata = {
>   	GATE(0, "pclk_efuse_1024", "pclk_cpu", 0, RK3288_CLKGATE_CON(11), 2, GFLAGS),
>   	GATE(PCLK_TZPC, "pclk_tzpc", "pclk_cpu", 0, RK3288_CLKGATE_CON(11), 3, GFLAGS),
>   	GATE(PCLK_UART2, "pclk_uart2", "pclk_cpu", 0, RK3288_CLKGATE_CON(11), 9, GFLAGS),
> -	GATE(0, "pclk_efuse_256", "pclk_cpu", 0, RK3288_CLKGATE_CON(11), 10, GFLAGS),
> +	GATE(PCLK_EFUSE256, "pclk_efuse_256", "pclk_cpu", CLK_IGNORE_UNUSED, RK3288_CLKGATE_CON(11), 10, GFLAGS),
>   	GATE(PCLK_RKPWM, "pclk_rkpwm", "pclk_cpu", CLK_IGNORE_UNUSED, RK3288_CLKGATE_CON(11), 11, GFLAGS),
>
>   	/* ddrctrl [DDR Controller PHY clock] gates */
> diff --git a/include/dt-bindings/clock/rk3288-cru.h b/include/dt-bindings/clock/rk3288-cru.h
> index c719aac..ab74d5e 100644
> --- a/include/dt-bindings/clock/rk3288-cru.h
> +++ b/include/dt-bindings/clock/rk3288-cru.h
> @@ -164,6 +164,7 @@
>   #define PCLK_DDRUPCTL1		366
>   #define PCLK_PUBL1		367
>   #define PCLK_WDT		368
> +#define PCLK_EFUSE256		369
>
>   /* hclk gates */
>   #define HCLK_GPS		448
>
diff mbox

Patch

diff --git a/drivers/clk/rockchip/clk-rk3288.c b/drivers/clk/rockchip/clk-rk3288.c
index 0df5bae..84d9218 100644
--- a/drivers/clk/rockchip/clk-rk3288.c
+++ b/drivers/clk/rockchip/clk-rk3288.c
@@ -647,7 +647,7 @@  static struct rockchip_clk_branch rk3288_clk_branches[] __initdata = {
 	GATE(0, "pclk_efuse_1024", "pclk_cpu", 0, RK3288_CLKGATE_CON(11), 2, GFLAGS),
 	GATE(PCLK_TZPC, "pclk_tzpc", "pclk_cpu", 0, RK3288_CLKGATE_CON(11), 3, GFLAGS),
 	GATE(PCLK_UART2, "pclk_uart2", "pclk_cpu", 0, RK3288_CLKGATE_CON(11), 9, GFLAGS),
-	GATE(0, "pclk_efuse_256", "pclk_cpu", 0, RK3288_CLKGATE_CON(11), 10, GFLAGS),
+	GATE(PCLK_EFUSE256, "pclk_efuse_256", "pclk_cpu", CLK_IGNORE_UNUSED, RK3288_CLKGATE_CON(11), 10, GFLAGS),
 	GATE(PCLK_RKPWM, "pclk_rkpwm", "pclk_cpu", CLK_IGNORE_UNUSED, RK3288_CLKGATE_CON(11), 11, GFLAGS),
 
 	/* ddrctrl [DDR Controller PHY clock] gates */
diff --git a/include/dt-bindings/clock/rk3288-cru.h b/include/dt-bindings/clock/rk3288-cru.h
index c719aac..ab74d5e 100644
--- a/include/dt-bindings/clock/rk3288-cru.h
+++ b/include/dt-bindings/clock/rk3288-cru.h
@@ -164,6 +164,7 @@ 
 #define PCLK_DDRUPCTL1		366
 #define PCLK_PUBL1		367
 #define PCLK_WDT		368
+#define PCLK_EFUSE256		369
 
 /* hclk gates */
 #define HCLK_GPS		448