[v8,6/6] clk: samsung: remove unused clock aliases and update clock flags

Message ID 1406611711-25112-7-git-send-email-thomas.ab@samsung.com
State New
Headers show

Commit Message

Thomas Abraham July 29, 2014, 5:28 a.m.
With some of the Exynos SoCs switched over to use the generic CPUfreq drivers,
the unused clock aliases can be removed. In addition to this, the individual
clock blocks which are now encapsulated with the consolidate CPU clock type
can now be marked with read-only flags.

Cc: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
---
 drivers/clk/samsung/clk-exynos4.c    |   44 +++++++++++++++++++---------------
 drivers/clk/samsung/clk-exynos5250.c |   19 ++++++++-------
 drivers/clk/samsung/clk-exynos5420.c |   27 ++++++++++++++-------
 3 files changed, 54 insertions(+), 36 deletions(-)

Comments

Tomasz Figa July 29, 2014, 10:44 a.m. | #1
Hi Thomas,

You can find few comments inline.

On 29.07.2014 07:28, Thomas Abraham wrote:

[snip]

> @@ -714,15 +715,24 @@ static struct samsung_div_clock exynos4_div_clks[] __initdata = {
                                                        ^^^

Keep in mind that following clocks are common for Exynos4210 and
Exynos4x12. Have you tested this series on a board based on Exynos4212
or 4412 to verify that it does not break the legacy driver? (I would
test it myself, but I am on holidays at the moment.)

>  	DIV(0, "div_clkout_rightbus", "mout_clkout_rightbus",
>  			CLKOUT_CMU_RIGHTBUS, 8, 6),
>  
> -	DIV(0, "div_core", "mout_core", DIV_CPU0, 0, 3),
> -	DIV(0, "div_corem0", "div_core2", DIV_CPU0, 4, 3),
> -	DIV(0, "div_corem1", "div_core2", DIV_CPU0, 8, 3),
> -	DIV(0, "div_periph", "div_core2", DIV_CPU0, 12, 3),

[snip]

> @@ -1501,7 +1507,7 @@ static void __init exynos4_clk_init(struct device_node *np,
>  		exynos4_soc == EXYNOS4210 ? "Exynos4210" : "Exynos4x12",
>  		_get_rate("sclk_apll"),	_get_rate("sclk_mpll"),
>  		_get_rate("sclk_epll"), _get_rate("sclk_vpll"),
> -		_get_rate("arm_clk"));
> +		_get_rate("armclk"));

This will not work on Exynos4412, because there is no "armclk" added for
this SoC. My suggestion is to simply keep name of the clock as is, move
current "arm_clk" divider to Exynos4x12-specific clocks and register
Exynos4210 CPU clock as "arm_clk".

Best regards,
Tomasz
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Thomas Abraham July 29, 2014, 12:04 p.m. | #2
Hi Tomasz,

On Tue, Jul 29, 2014 at 4:14 PM, Tomasz Figa <tomasz.figa@gmail.com> wrote:
> Hi Thomas,
>
> You can find few comments inline.
>
> On 29.07.2014 07:28, Thomas Abraham wrote:
>
> [snip]
>
>> @@ -714,15 +715,24 @@ static struct samsung_div_clock exynos4_div_clks[] __initdata = {
>                                                         ^^^
>
> Keep in mind that following clocks are common for Exynos4210 and
> Exynos4x12. Have you tested this series on a board based on Exynos4212
> or 4412 to verify that it does not break the legacy driver? (I would
> test it myself, but I am on holidays at the moment.)

Thanks for taking time to have a look at this series. I have tested
this series with the old cpufreq driver for Exynos4412 on an
Origen4412 board and it works fine. These divider clocks are not
directly used or referenced by the legacy cpufreq driver. So I marked
them as read-only here.

>
>>       DIV(0, "div_clkout_rightbus", "mout_clkout_rightbus",
>>                       CLKOUT_CMU_RIGHTBUS, 8, 6),
>>
>> -     DIV(0, "div_core", "mout_core", DIV_CPU0, 0, 3),
>> -     DIV(0, "div_corem0", "div_core2", DIV_CPU0, 4, 3),
>> -     DIV(0, "div_corem1", "div_core2", DIV_CPU0, 8, 3),
>> -     DIV(0, "div_periph", "div_core2", DIV_CPU0, 12, 3),
>
> [snip]
>
>> @@ -1501,7 +1507,7 @@ static void __init exynos4_clk_init(struct device_node *np,
>>               exynos4_soc == EXYNOS4210 ? "Exynos4210" : "Exynos4x12",
>>               _get_rate("sclk_apll"), _get_rate("sclk_mpll"),
>>               _get_rate("sclk_epll"), _get_rate("sclk_vpll"),
>> -             _get_rate("arm_clk"));
>> +             _get_rate("armclk"));
>
> This will not work on Exynos4412, because there is no "armclk" added for
> this SoC. My suggestion is to simply keep name of the clock as is, move
> current "arm_clk" divider to Exynos4x12-specific clocks and register
> Exynos4210 CPU clock as "arm_clk".

Ok. Will do this in the next version.

Thanks,
Thomas.

>
> Best regards,
> Tomasz
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Tomasz Figa July 29, 2014, 12:11 p.m. | #3
On 29.07.2014 14:04, Thomas Abraham wrote:
> Hi Tomasz,
> 
> On Tue, Jul 29, 2014 at 4:14 PM, Tomasz Figa <tomasz.figa@gmail.com> wrote:
>> Hi Thomas,
>>
>> You can find few comments inline.
>>
>> On 29.07.2014 07:28, Thomas Abraham wrote:
>>
>> [snip]
>>
>>> @@ -714,15 +715,24 @@ static struct samsung_div_clock exynos4_div_clks[] __initdata = {
>>                                                         ^^^
>>
>> Keep in mind that following clocks are common for Exynos4210 and
>> Exynos4x12. Have you tested this series on a board based on Exynos4212
>> or 4412 to verify that it does not break the legacy driver? (I would
>> test it myself, but I am on holidays at the moment.)
> 
> Thanks for taking time to have a look at this series. I have tested
> this series with the old cpufreq driver for Exynos4412 on an
> Origen4412 board and it works fine. These divider clocks are not
> directly used or referenced by the legacy cpufreq driver. So I marked
> them as read-only here.

OK.

Best regards,
Tomasz
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Patch

diff --git a/drivers/clk/samsung/clk-exynos4.c b/drivers/clk/samsung/clk-exynos4.c
index 5388806..b482e39 100644
--- a/drivers/clk/samsung/clk-exynos4.c
+++ b/drivers/clk/samsung/clk-exynos4.c
@@ -578,7 +578,8 @@  static struct samsung_mux_clock exynos4210_mux_clks[] __initdata = {
 	MUX(0, "mout_fimd1", group1_p4210, E4210_SRC_LCD1, 0, 4),
 	MUX(0, "mout_mipi1", group1_p4210, E4210_SRC_LCD1, 12, 4),
 	MUX(CLK_SCLK_MPLL, "sclk_mpll", mout_mpll_p, SRC_CPU, 8, 1),
-	MUX(CLK_MOUT_CORE, "mout_core", mout_core_p4210, SRC_CPU, 16, 1),
+	MUX_F(CLK_MOUT_CORE, "mout_core", mout_core_p4210, SRC_CPU, 16, 1, 0,
+			CLK_MUX_READ_ONLY),
 	MUX(0, "mout_hpm", mout_core_p4210, SRC_CPU, 20, 1),
 	MUX(CLK_SCLK_VPLL, "sclk_vpll", sclk_vpll_p4210, SRC_TOP0, 8, 1),
 	MUX(CLK_MOUT_FIMC0, "mout_fimc0", group1_p4210, SRC_CAM, 0, 4),
@@ -714,15 +715,24 @@  static struct samsung_div_clock exynos4_div_clks[] __initdata = {
 	DIV(0, "div_clkout_rightbus", "mout_clkout_rightbus",
 			CLKOUT_CMU_RIGHTBUS, 8, 6),
 
-	DIV(0, "div_core", "mout_core", DIV_CPU0, 0, 3),
-	DIV(0, "div_corem0", "div_core2", DIV_CPU0, 4, 3),
-	DIV(0, "div_corem1", "div_core2", DIV_CPU0, 8, 3),
-	DIV(0, "div_periph", "div_core2", DIV_CPU0, 12, 3),
-	DIV(0, "div_atb", "mout_core", DIV_CPU0, 16, 3),
-	DIV(0, "div_pclk_dbg", "div_atb", DIV_CPU0, 20, 3),
-	DIV(0, "div_core2", "div_core", DIV_CPU0, 28, 3),
-	DIV(0, "div_copy", "mout_hpm", DIV_CPU1, 0, 3),
-	DIV(0, "div_hpm", "div_copy", DIV_CPU1, 4, 3),
+	DIV_F(0, "div_core", "mout_core", DIV_CPU0, 0, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
+	DIV_F(0, "div_corem0", "div_core2", DIV_CPU0, 4, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
+	DIV_F(0, "div_corem1", "div_core2", DIV_CPU0, 8, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
+	DIV_F(0, "div_periph", "div_core2", DIV_CPU0, 12, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
+	DIV_F(0, "div_atb", "mout_core", DIV_CPU0, 16, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
+	DIV_F(0, "div_pclk_dbg", "div_atb", DIV_CPU0, 20, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
+	DIV_F(0, "div_core2", "div_core", DIV_CPU0, 28, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
+	DIV_F(0, "div_copy", "mout_hpm", DIV_CPU1, 0, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
+	DIV_F(0, "div_hpm", "div_copy", DIV_CPU1, 4, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
 	DIV(0, "div_clkout_cpu", "mout_clkout_cpu", CLKOUT_CMU_CPU, 8, 6),
 
 	DIV(0, "div_fimc0", "mout_fimc0", DIV_CAM, 0, 4),
@@ -770,8 +780,10 @@  static struct samsung_div_clock exynos4_div_clks[] __initdata = {
 	DIV(0, "div_spi_pre2", "div_spi2", DIV_PERIL2, 8, 8),
 	DIV(0, "div_audio1", "mout_audio1", DIV_PERIL4, 0, 4),
 	DIV(0, "div_audio2", "mout_audio2", DIV_PERIL4, 16, 4),
-	DIV(CLK_ARM_CLK, "arm_clk", "div_core2", DIV_CPU0, 28, 3),
-	DIV(CLK_SCLK_APLL, "sclk_apll", "mout_apll", DIV_CPU0, 24, 3),
+	DIV_F(CLK_ARM_CLK, "arm_clk", "div_core2", DIV_CPU0, 28, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
+	DIV_F(CLK_SCLK_APLL, "sclk_apll", "mout_apll", DIV_CPU0, 24, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
 	DIV_F(0, "div_mipi_pre0", "div_mipi0", DIV_LCD0, 20, 4,
 			CLK_SET_RATE_PARENT, 0),
 	DIV_F(0, "div_mmc_pre0", "div_mmc0", DIV_FSYS1, 8, 8,
@@ -1194,10 +1206,6 @@  static struct samsung_clock_alias exynos4_aliases[] __initdata = {
 	ALIAS(CLK_SCLK_APLL, NULL, "mout_apll"),
 };
 
-static struct samsung_clock_alias exynos4210_aliases[] __initdata = {
-	ALIAS(CLK_SCLK_MPLL, NULL, "mout_mpll"),
-};
-
 static struct samsung_clock_alias exynos4x12_aliases[] __initdata = {
 	ALIAS(CLK_MOUT_MPLL_USER_C, NULL, "mout_mpll"),
 };
@@ -1465,8 +1473,6 @@  static void __init exynos4_clk_init(struct device_node *np,
 			ARRAY_SIZE(exynos4210_div_clks));
 		samsung_clk_register_gate(ctx, exynos4210_gate_clks,
 			ARRAY_SIZE(exynos4210_gate_clks));
-		samsung_clk_register_alias(ctx, exynos4210_aliases,
-			ARRAY_SIZE(exynos4210_aliases));
 		samsung_clk_register_fixed_factor(ctx,
 			exynos4210_fixed_factor_clks,
 			ARRAY_SIZE(exynos4210_fixed_factor_clks));
@@ -1501,7 +1507,7 @@  static void __init exynos4_clk_init(struct device_node *np,
 		exynos4_soc == EXYNOS4210 ? "Exynos4210" : "Exynos4x12",
 		_get_rate("sclk_apll"),	_get_rate("sclk_mpll"),
 		_get_rate("sclk_epll"), _get_rate("sclk_vpll"),
-		_get_rate("arm_clk"));
+		_get_rate("armclk"));
 }
 
 
diff --git a/drivers/clk/samsung/clk-exynos5250.c b/drivers/clk/samsung/clk-exynos5250.c
index e19e365..1d958f1 100644
--- a/drivers/clk/samsung/clk-exynos5250.c
+++ b/drivers/clk/samsung/clk-exynos5250.c
@@ -291,14 +291,14 @@  static struct samsung_mux_clock exynos5250_mux_clks[] __initdata = {
 	/*
 	 * CMU_CPU
 	 */
-	MUX_FA(0, "mout_apll", mout_apll_p, SRC_CPU, 0, 1,
-					CLK_SET_RATE_PARENT, 0, "mout_apll"),
-	MUX_A(0, "mout_cpu", mout_cpu_p, SRC_CPU, 16, 1, "mout_cpu"),
+	MUX_F(0, "mout_apll", mout_apll_p, SRC_CPU, 0, 1,
+			CLK_SET_RATE_PARENT, 0),
+	MUX_F(0, "mout_cpu", mout_cpu_p, SRC_CPU, 16, 1, 0, CLK_MUX_READ_ONLY),
 
 	/*
 	 * CMU_CORE
 	 */
-	MUX_A(0, "mout_mpll", mout_mpll_p, SRC_CORE1, 8, 1, "mout_mpll"),
+	MUX(0, "mout_mpll", mout_mpll_p, SRC_CORE1, 8, 1),
 
 	/*
 	 * CMU_TOP
@@ -380,9 +380,12 @@  static struct samsung_div_clock exynos5250_div_clks[] __initdata = {
 	/*
 	 * CMU_CPU
 	 */
-	DIV(0, "div_arm", "mout_cpu", DIV_CPU0, 0, 3),
-	DIV(0, "div_apll", "mout_apll", DIV_CPU0, 24, 3),
-	DIV_A(0, "div_arm2", "div_arm", DIV_CPU0, 28, 3, "armclk"),
+	DIV_F(0, "div_arm", "mout_cpu", DIV_CPU0, 0, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
+	DIV_F(0, "div_apll", "mout_apll", DIV_CPU0, 24, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
+	DIV_F(0, "div_arm2", "div_arm", DIV_CPU0, 28, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
 
 	/*
 	 * CMU_TOP
@@ -848,6 +851,6 @@  static void __init exynos5250_clk_init(struct device_node *np)
 	samsung_clk_of_add_provider(np, ctx);
 
 	pr_info("Exynos5250: clock setup completed, armclk=%ld\n",
-			_get_rate("div_arm2"));
+			_get_rate("armclk"));
 }
 CLK_OF_DECLARE(exynos5250_clk, "samsung,exynos5250-clock", exynos5250_clk_init);
diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c
index d7ef36a..fcf365d 100644
--- a/drivers/clk/samsung/clk-exynos5420.c
+++ b/drivers/clk/samsung/clk-exynos5420.c
@@ -617,10 +617,14 @@  static struct samsung_mux_clock exynos5x_mux_clks[] __initdata = {
 	MUX(0, "mout_mspll_kfc", mout_mspll_cpu_p, SRC_TOP7, 8, 2),
 	MUX(0, "mout_mspll_cpu", mout_mspll_cpu_p, SRC_TOP7, 12, 2),
 
-	MUX(0, "mout_apll", mout_apll_p, SRC_CPU, 0, 1),
-	MUX(0, "mout_cpu", mout_cpu_p, SRC_CPU, 16, 1),
-	MUX(0, "mout_kpll", mout_kpll_p, SRC_KFC, 0, 1),
-	MUX(0, "mout_kfc", mout_kfc_p, SRC_KFC, 16, 1),
+	MUX_F(0, "mout_apll", mout_apll_p, SRC_CPU, 0, 1,
+				CLK_SET_RATE_PARENT, 0),
+	MUX_F(0, "mout_cpu", mout_cpu_p, SRC_CPU, 16, 1, 0,
+				CLK_MUX_READ_ONLY),
+	MUX_F(0, "mout_kpll", mout_kpll_p, SRC_KFC, 0, 1,
+				CLK_SET_RATE_PARENT, 0),
+	MUX_F(0, "mout_kfc", mout_kfc_p, SRC_KFC, 16, 1, 0,
+				CLK_MUX_READ_ONLY),
 
 	MUX(0, "mout_aclk200", mout_group1_p, SRC_TOP0, 8, 2),
 	MUX(0, "mout_aclk200_fsys2", mout_group1_p, SRC_TOP0, 12, 2),
@@ -776,11 +780,16 @@  static struct samsung_mux_clock exynos5x_mux_clks[] __initdata = {
 };
 
 static struct samsung_div_clock exynos5x_div_clks[] __initdata = {
-	DIV(0, "div_arm", "mout_cpu", DIV_CPU0, 0, 3),
-	DIV(0, "sclk_apll", "mout_apll", DIV_CPU0, 24, 3),
-	DIV(0, "armclk2", "div_arm", DIV_CPU0, 28, 3),
-	DIV(0, "div_kfc", "mout_kfc", DIV_KFC0, 0, 3),
-	DIV(0, "sclk_kpll", "mout_kpll", DIV_KFC0, 24, 3),
+	DIV_F(0, "div_arm", "mout_cpu", DIV_CPU0, 0, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
+	DIV_F(0, "sclk_apll", "mout_apll", DIV_CPU0, 24, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
+	DIV_F(0, "armclk2", "div_arm", DIV_CPU0, 28, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
+	DIV_F(0, "div_kfc", "mout_kfc", DIV_KFC0, 0, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
+	DIV_F(0, "sclk_kpll", "mout_kpll", DIV_KFC0, 24, 3,
+			CLK_GET_RATE_NOCACHE, CLK_DIVIDER_READ_ONLY),
 
 	DIV(0, "dout_aclk400_isp", "mout_aclk400_isp", DIV_TOP0, 0, 3),
 	DIV(0, "dout_aclk400_mscl", "mout_aclk400_mscl", DIV_TOP0, 4, 3),