[PATCH 1/5] ACPI: APD: Change name from ST to FCH

[PATCH 1/5] ACPI: APD: Change name from ST to FCH

[Akshu Agrawal]

AMD SoC general pupose clk is present in new platforms with
same MMIO mappings. We can reuse the same clk handler support
for other platforms. Hence, changing name from ST(SoC) to FCH(IP)

Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
---
 drivers/acpi/acpi_apd.c                            | 14 +++++++-------
 .../linux/platform_data/{clk-st.h => clk-fch.h}    | 10 +++++-----
 2 files changed, 12 insertions(+), 12 deletions(-)
 rename include/linux/platform_data/{clk-st.h => clk-fch.h} (53%)

diff --git a/drivers/acpi/acpi_apd.c b/drivers/acpi/acpi_apd.c
index ba2612e9a0eb..2d99e46add1a 100644
--- a/drivers/acpi/acpi_apd.c
+++ b/drivers/acpi/acpi_apd.c
@@ -8,7 +8,7 @@
  */
 
 #include <linux/clk-provider.h>
-#include <linux/platform_data/clk-st.h>
+#include <linux/platform_data/clk-fch.h>
 #include <linux/platform_device.h>
 #include <linux/pm_domain.h>
 #include <linux/clkdev.h>
@@ -79,11 +79,11 @@ static int misc_check_res(struct acpi_resource *ares, void *data)
 	return !acpi_dev_resource_memory(ares, &res);
 }
 
-static int st_misc_setup(struct apd_private_data *pdata)
+static int fch_misc_setup(struct apd_private_data *pdata)
 {
 	struct acpi_device *adev = pdata->adev;
 	struct platform_device *clkdev;
-	struct st_clk_data *clk_data;
+	struct fch_clk_data *clk_data;
 	struct resource_entry *rentry;
 	struct list_head resource_list;
 	int ret;
@@ -106,7 +106,7 @@ static int st_misc_setup(struct apd_private_data *pdata)
 
 	acpi_dev_free_resource_list(&resource_list);
 
-	clkdev = platform_device_register_data(&adev->dev, "clk-st",
+	clkdev = platform_device_register_data(&adev->dev, "clk-fch",
 					       PLATFORM_DEVID_NONE, clk_data,
 					       sizeof(*clk_data));
 	return PTR_ERR_OR_ZERO(clkdev);
@@ -135,8 +135,8 @@ static const struct apd_device_desc cz_uart_desc = {
 	.properties = uart_properties,
 };
 
-static const struct apd_device_desc st_misc_desc = {
-	.setup = st_misc_setup,
+static const struct apd_device_desc fch_misc_desc = {
+	.setup = fch_misc_setup,
 };
 #endif
 
@@ -239,7 +239,7 @@ static const struct acpi_device_id acpi_apd_device_ids[] = {
 	{ "AMD0020", APD_ADDR(cz_uart_desc) },
 	{ "AMDI0020", APD_ADDR(cz_uart_desc) },
 	{ "AMD0030", },
-	{ "AMD0040", APD_ADDR(st_misc_desc)},
+	{ "AMD0040", APD_ADDR(fch_misc_desc)},
 #endif
 #ifdef CONFIG_ARM64
 	{ "APMC0D0F", APD_ADDR(xgene_i2c_desc) },
diff --git a/include/linux/platform_data/clk-st.h b/include/linux/platform_data/clk-fch.h
similarity index 53%
rename from include/linux/platform_data/clk-st.h
rename to include/linux/platform_data/clk-fch.h
index 7cdb6a402b35..850ca776156d 100644
--- a/include/linux/platform_data/clk-st.h
+++ b/include/linux/platform_data/clk-fch.h
@@ -1,17 +1,17 @@
 /* SPDX-License-Identifier: MIT */
 /*
- * clock framework for AMD Stoney based clock
+ * clock framework for AMD misc clocks
  *
  * Copyright 2018 Advanced Micro Devices, Inc.
  */
 
-#ifndef __CLK_ST_H
-#define __CLK_ST_H
+#ifndef __CLK_FCH_H
+#define __CLK_FCH_H
 
 #include <linux/compiler.h>
 
-struct st_clk_data {
+struct fch_clk_data {
 	void __iomem *base;
 };
 
-#endif /* __CLK_ST_H */
+#endif /* __CLK_FCH_H */
-- 
2.20.1

[PATCH 2/5] clk: x86: Change name from ST to FCH

[Akshu Agrawal]

AMD SoC general pupose clk is present in new platforms with
minor differences. We can reuse the same clk driver for other
platforms. Hence, changing name from ST(SoC) to FCH(IP)

Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
---
 drivers/clk/x86/Makefile                |  2 +-
 drivers/clk/x86/{clk-st.c => clk-fch.c} | 26 ++++++++++++-------------
 2 files changed, 14 insertions(+), 14 deletions(-)
 rename drivers/clk/x86/{clk-st.c => clk-fch.c} (73%)

diff --git a/drivers/clk/x86/Makefile b/drivers/clk/x86/Makefile
index 7c774ea7ddeb..18564efdc651 100644
--- a/drivers/clk/x86/Makefile
+++ b/drivers/clk/x86/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 obj-$(CONFIG_PMC_ATOM)		+= clk-pmc-atom.o
-obj-$(CONFIG_X86_AMD_PLATFORM_DEVICE)	+= clk-st.o
+obj-$(CONFIG_X86_AMD_PLATFORM_DEVICE)	+= clk-fch.o
 clk-x86-lpss-objs		:= clk-lpt.o
 obj-$(CONFIG_X86_INTEL_LPSS)	+= clk-x86-lpss.o
 obj-$(CONFIG_CLK_LGM_CGU)	+= clk-cgu.o clk-cgu-pll.o clk-lgm.o
diff --git a/drivers/clk/x86/clk-st.c b/drivers/clk/x86/clk-fch.c
similarity index 73%
rename from drivers/clk/x86/clk-st.c
rename to drivers/clk/x86/clk-fch.c
index 25d4b97aff9b..b252f0cf0628 100644
--- a/drivers/clk/x86/clk-st.c
+++ b/drivers/clk/x86/clk-fch.c
@@ -8,7 +8,7 @@
 #include <linux/clk.h>
 #include <linux/clkdev.h>
 #include <linux/clk-provider.h>
-#include <linux/platform_data/clk-st.h>
+#include <linux/platform_data/clk-fch.h>
 #include <linux/platform_device.h>
 
 /* Clock Driving Strength 2 register */
@@ -29,12 +29,12 @@
 static const char * const clk_oscout1_parents[] = { "clk48MHz", "clk25MHz" };
 static struct clk_hw *hws[ST_MAX_CLKS];
 
-static int st_clk_probe(struct platform_device *pdev)
+static int fch_clk_probe(struct platform_device *pdev)
 {
-	struct st_clk_data *st_data;
+	struct fch_clk_data *fch_data;
 
-	st_data = dev_get_platdata(&pdev->dev);
-	if (!st_data || !st_data->base)
+	fch_data = dev_get_platdata(&pdev->dev);
+	if (!fch_data || !fch_data->base)
 		return -EINVAL;
 
 	hws[ST_CLK_48M] = clk_hw_register_fixed_rate(NULL, "clk48MHz", NULL, 0,
@@ -44,12 +44,12 @@ static int st_clk_probe(struct platform_device *pdev)
 
 	hws[ST_CLK_MUX] = clk_hw_register_mux(NULL, "oscout1_mux",
 		clk_oscout1_parents, ARRAY_SIZE(clk_oscout1_parents),
-		0, st_data->base + CLKDRVSTR2, OSCOUT1CLK25MHZ, 3, 0, NULL);
+		0, fch_data->base + CLKDRVSTR2, OSCOUT1CLK25MHZ, 3, 0, NULL);
 
 	clk_set_parent(hws[ST_CLK_MUX]->clk, hws[ST_CLK_48M]->clk);
 
 	hws[ST_CLK_GATE] = clk_hw_register_gate(NULL, "oscout1", "oscout1_mux",
-		0, st_data->base + MISCCLKCNTL1, OSCCLKENB,
+		0, fch_data->base + MISCCLKCNTL1, OSCCLKENB,
 		CLK_GATE_SET_TO_DISABLE, NULL);
 
 	devm_clk_hw_register_clkdev(&pdev->dev, hws[ST_CLK_GATE], "oscout1",
@@ -58,7 +58,7 @@ static int st_clk_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int st_clk_remove(struct platform_device *pdev)
+static int fch_clk_remove(struct platform_device *pdev)
 {
 	int i;
 
@@ -67,12 +67,12 @@ static int st_clk_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static struct platform_driver st_clk_driver = {
+static struct platform_driver fch_clk_driver = {
 	.driver = {
-		.name = "clk-st",
+		.name = "clk-fch",
 		.suppress_bind_attrs = true,
 	},
-	.probe = st_clk_probe,
-	.remove = st_clk_remove,
+	.probe = fch_clk_probe,
+	.remove = fch_clk_remove,
 };
-builtin_platform_driver(st_clk_driver);
+builtin_platform_driver(fch_clk_driver);
-- 
2.20.1

[PATCH 3/5] ACPI: APD: Add a fmw property is_raven

[Akshu Agrawal]

Since there is slight difference in AMD RV based soc in misc
clk architecture. The fmw property will help in differentiating
the SoCs.

Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
---
 drivers/acpi/acpi_apd.c               | 4 ++++
 include/linux/platform_data/clk-fch.h | 1 +
 2 files changed, 5 insertions(+)

diff --git a/drivers/acpi/acpi_apd.c b/drivers/acpi/acpi_apd.c
index 2d99e46add1a..d879ba28826c 100644
--- a/drivers/acpi/acpi_apd.c
+++ b/drivers/acpi/acpi_apd.c
@@ -82,6 +82,7 @@ static int misc_check_res(struct acpi_resource *ares, void *data)
 static int fch_misc_setup(struct apd_private_data *pdata)
 {
 	struct acpi_device *adev = pdata->adev;
+	const union acpi_object *obj;
 	struct platform_device *clkdev;
 	struct fch_clk_data *clk_data;
 	struct resource_entry *rentry;
@@ -98,6 +99,9 @@ static int fch_misc_setup(struct apd_private_data *pdata)
 	if (ret < 0)
 		return -ENOENT;
 
+	acpi_dev_get_property(adev, "is-rv", ACPI_TYPE_INTEGER, &obj);
+	clk_data->is_rv = obj->integer.value;
+
 	list_for_each_entry(rentry, &resource_list, node) {
 		clk_data->base = devm_ioremap(&adev->dev, rentry->res->start,
 					      resource_size(rentry->res));
diff --git a/include/linux/platform_data/clk-fch.h b/include/linux/platform_data/clk-fch.h
index 850ca776156d..b9f682459f08 100644
--- a/include/linux/platform_data/clk-fch.h
+++ b/include/linux/platform_data/clk-fch.h
@@ -12,6 +12,7 @@
 
 struct fch_clk_data {
 	void __iomem *base;
+	u32 is_rv;
 };
 
 #endif /* __CLK_FCH_H */
-- 
2.20.1

[PATCH 4/5] clk: x86: Support RV architecture

[Akshu Agrawal]

There is minor difference between previous family of SoC and
the current one. Which is the there is only 48Mh fixed clk.
There is no mux and no option to select another freq as there in previous.

Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
---
 drivers/clk/x86/clk-fch.c | 55 ++++++++++++++++++++++++++++-----------
 1 file changed, 40 insertions(+), 15 deletions(-)

diff --git a/drivers/clk/x86/clk-fch.c b/drivers/clk/x86/clk-fch.c
index b252f0cf0628..a8aac71a3b65 100644
--- a/drivers/clk/x86/clk-fch.c
+++ b/drivers/clk/x86/clk-fch.c
@@ -26,6 +26,10 @@
 #define ST_CLK_GATE	3
 #define ST_MAX_CLKS	4
 
+#define RV_CLK_48M	0
+#define RV_CLK_GATE	1
+#define RV_MAX_CLKS	2
+
 static const char * const clk_oscout1_parents[] = { "clk48MHz", "clk25MHz" };
 static struct clk_hw *hws[ST_MAX_CLKS];
 
@@ -37,23 +41,36 @@ static int fch_clk_probe(struct platform_device *pdev)
 	if (!fch_data || !fch_data->base)
 		return -EINVAL;
 
-	hws[ST_CLK_48M] = clk_hw_register_fixed_rate(NULL, "clk48MHz", NULL, 0,
-						     48000000);
-	hws[ST_CLK_25M] = clk_hw_register_fixed_rate(NULL, "clk25MHz", NULL, 0,
-						     25000000);
+	if (!fch_data->is_rv) {
+		hws[ST_CLK_48M] = clk_hw_register_fixed_rate(NULL, "clk48MHz",
+			NULL, 0, 48000000);
+		hws[ST_CLK_25M] = clk_hw_register_fixed_rate(NULL, "clk25MHz",
+			NULL, 0, 25000000);
+
+		hws[ST_CLK_MUX] = clk_hw_register_mux(NULL, "oscout1_mux",
+			clk_oscout1_parents, ARRAY_SIZE(clk_oscout1_parents),
+			0, fch_data->base + CLKDRVSTR2, OSCOUT1CLK25MHZ, 3, 0,
+			NULL);
+
+		clk_set_parent(hws[ST_CLK_MUX]->clk, hws[ST_CLK_48M]->clk);
 
-	hws[ST_CLK_MUX] = clk_hw_register_mux(NULL, "oscout1_mux",
-		clk_oscout1_parents, ARRAY_SIZE(clk_oscout1_parents),
-		0, fch_data->base + CLKDRVSTR2, OSCOUT1CLK25MHZ, 3, 0, NULL);
+		hws[ST_CLK_GATE] = clk_hw_register_gate(NULL, "oscout1",
+			"oscout1_mux", 0, fch_data->base + MISCCLKCNTL1,
+			OSCCLKENB, CLK_GATE_SET_TO_DISABLE, NULL);
 
-	clk_set_parent(hws[ST_CLK_MUX]->clk, hws[ST_CLK_48M]->clk);
+		devm_clk_hw_register_clkdev(&pdev->dev, hws[ST_CLK_GATE],
+			"oscout1", NULL);
+	} else {
+		hws[RV_CLK_48M] = clk_hw_register_fixed_rate(NULL, "clk48MHz",
+			NULL, 0, 48000000);
 
-	hws[ST_CLK_GATE] = clk_hw_register_gate(NULL, "oscout1", "oscout1_mux",
-		0, fch_data->base + MISCCLKCNTL1, OSCCLKENB,
-		CLK_GATE_SET_TO_DISABLE, NULL);
+		hws[RV_CLK_GATE] = clk_hw_register_gate(NULL, "oscout1",
+			"clk48MHz", 0, fch_data->base + MISCCLKCNTL1,
+			OSCCLKENB, CLK_GATE_SET_TO_DISABLE, NULL);
 
-	devm_clk_hw_register_clkdev(&pdev->dev, hws[ST_CLK_GATE], "oscout1",
-				    NULL);
+		devm_clk_hw_register_clkdev(&pdev->dev, hws[RV_CLK_GATE],
+			"oscout1", NULL);
+	}
 
 	return 0;
 }
@@ -61,9 +78,17 @@ static int fch_clk_probe(struct platform_device *pdev)
 static int fch_clk_remove(struct platform_device *pdev)
 {
 	int i;
+	struct fch_clk_data *fch_data;
+
+	fch_data = dev_get_platdata(&pdev->dev);
 
-	for (i = 0; i < ST_MAX_CLKS; i++)
-		clk_hw_unregister(hws[i]);
+	if (!fch_data->is_rv) {
+		for (i = 0; i < ST_MAX_CLKS; i++)
+			clk_hw_unregister(hws[i]);
+	} else {
+		for (i = 0; i < RV_MAX_CLKS; i++)
+			clk_hw_unregister(hws[i]);
+	}
 	return 0;
 }
 
-- 
2.20.1

Re: [PATCH 2/5] clk: x86: Change name from ST to FCH

[Stephen Boyd]

Quoting Akshu Agrawal (2020-07-12 17:59:50)
> diff --git a/drivers/clk/x86/clk-st.c b/drivers/clk/x86/clk-fch.c
> similarity index 73%
> rename from drivers/clk/x86/clk-st.c
> rename to drivers/clk/x86/clk-fch.c
> index 25d4b97aff9b..b252f0cf0628 100644
> --- a/drivers/clk/x86/clk-st.c
> +++ b/drivers/clk/x86/clk-fch.c
> @@ -8,7 +8,7 @@
>  #include <linux/clk.h>
>  #include <linux/clkdev.h>
>  #include <linux/clk-provider.h>
> -#include <linux/platform_data/clk-st.h>
> +#include <linux/platform_data/clk-fch.h>

Is this file moved somewhere?

>  #include <linux/platform_device.h>
>  
>  /* Clock Driving Strength 2 register */

Re: [PATCH 4/5] clk: x86: Support RV architecture

[Stephen Boyd]

Quoting Akshu Agrawal (2020-07-12 17:59:52)
> There is minor difference between previous family of SoC and
> the current one. Which is the there is only 48Mh fixed clk.
> There is no mux and no option to select another freq as there in previous.
> 
> Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
> ---

I only see four out of five patches and there isn't a cover letter. I
have no idea if I can apply this change or if you're expecting me to ack
it. Please help make my life a little easier!

>  drivers/clk/x86/clk-fch.c | 55 ++++++++++++++++++++++++++++-----------
>  1 file changed, 40 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/clk/x86/clk-fch.c b/drivers/clk/x86/clk-fch.c
> index b252f0cf0628..a8aac71a3b65 100644
> --- a/drivers/clk/x86/clk-fch.c
> +++ b/drivers/clk/x86/clk-fch.c
> @@ -61,9 +78,17 @@ static int fch_clk_probe(struct platform_device *pdev)
>  static int fch_clk_remove(struct platform_device *pdev)
>  {
>         int i;
> +       struct fch_clk_data *fch_data;
> +
> +       fch_data = dev_get_platdata(&pdev->dev);
>  
> -       for (i = 0; i < ST_MAX_CLKS; i++)
> -               clk_hw_unregister(hws[i]);
> +       if (!fch_data->is_rv) {
> +               for (i = 0; i < ST_MAX_CLKS; i++)
> +                       clk_hw_unregister(hws[i]);
> +       } else {
> +               for (i = 0; i < RV_MAX_CLKS; i++)
> +                       clk_hw_unregister(hws[i]);

Can ST_MAX_CLKS or RV_MAX_CLKS be a local variable and then the loop
consolidated.

Re: [PATCH 2/5] clk: x86: Change name from ST to FCH

[Agrawal, Akshu]

On 7/16/2020 6:12 AM, Stephen Boyd wrote:
> Quoting Akshu Agrawal (2020-07-12 17:59:50)
>> diff --git a/drivers/clk/x86/clk-st.c b/drivers/clk/x86/clk-fch.c
>> similarity index 73%
>> rename from drivers/clk/x86/clk-st.c
>> rename to drivers/clk/x86/clk-fch.c
>> index 25d4b97aff9b..b252f0cf0628 100644
>> --- a/drivers/clk/x86/clk-st.c
>> +++ b/drivers/clk/x86/clk-fch.c
>> @@ -8,7 +8,7 @@
>>   #include <linux/clk.h>
>>   #include <linux/clkdev.h>
>>   #include <linux/clk-provider.h>
>> -#include <linux/platform_data/clk-st.h>
>> +#include <linux/platform_data/clk-fch.h>
> Is this file moved somewhere?

Renaming it from ST to FCH in previous patch of the series.

Thanks,

Akshu

Re: [PATCH 4/5] clk: x86: Support RV architecture

[Agrawal, Akshu]

On 7/16/2020 6:33 AM, Stephen Boyd wrote:
> Quoting Akshu Agrawal (2020-07-12 17:59:52)
>> There is minor difference between previous family of SoC and
>> the current one. Which is the there is only 48Mh fixed clk.
>> There is no mux and no option to select another freq as there in previous.
>>
>> Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
>> ---
> I only see four out of five patches and there isn't a cover letter. I
> have no idea if I can apply this change or if you're expecting me to ack
> it. Please help make my life a little easier!

Numbering went wrong due to another unrelated patch.

Will send another with cover letter explaining the series.

>>   drivers/clk/x86/clk-fch.c | 55 ++++++++++++++++++++++++++++-----------
>>   1 file changed, 40 insertions(+), 15 deletions(-)
>>
>> diff --git a/drivers/clk/x86/clk-fch.c b/drivers/clk/x86/clk-fch.c
>> index b252f0cf0628..a8aac71a3b65 100644
>> --- a/drivers/clk/x86/clk-fch.c
>> +++ b/drivers/clk/x86/clk-fch.c
>> @@ -61,9 +78,17 @@ static int fch_clk_probe(struct platform_device *pdev)
>>   static int fch_clk_remove(struct platform_device *pdev)
>>   {
>>          int i;
>> +       struct fch_clk_data *fch_data;
>> +
>> +       fch_data = dev_get_platdata(&pdev->dev);
>>   
>> -       for (i = 0; i < ST_MAX_CLKS; i++)
>> -               clk_hw_unregister(hws[i]);
>> +       if (!fch_data->is_rv) {
>> +               for (i = 0; i < ST_MAX_CLKS; i++)
>> +                       clk_hw_unregister(hws[i]);
>> +       } else {
>> +               for (i = 0; i < RV_MAX_CLKS; i++)
>> +                       clk_hw_unregister(hws[i]);
> Can ST_MAX_CLKS or RV_MAX_CLKS be a local variable and then the loop
> consolidated.

Yes, making the change in next series.

Thanks,

Akshu

Re: [PATCH 2/5] clk: x86: Change name from ST to FCH

[Stephen Boyd]

Quoting Agrawal, Akshu (2020-07-19 21:59:02)
> 
> On 7/16/2020 6:12 AM, Stephen Boyd wrote:
> > Quoting Akshu Agrawal (2020-07-12 17:59:50)
> >> diff --git a/drivers/clk/x86/clk-st.c b/drivers/clk/x86/clk-fch.c
> >> similarity index 73%
> >> rename from drivers/clk/x86/clk-st.c
> >> rename to drivers/clk/x86/clk-fch.c
> >> index 25d4b97aff9b..b252f0cf0628 100644
> >> --- a/drivers/clk/x86/clk-st.c
> >> +++ b/drivers/clk/x86/clk-fch.c
> >> @@ -8,7 +8,7 @@
> >>   #include <linux/clk.h>
> >>   #include <linux/clkdev.h>
> >>   #include <linux/clk-provider.h>
> >> -#include <linux/platform_data/clk-st.h>
> >> +#include <linux/platform_data/clk-fch.h>
> > Is this file moved somewhere?
> 
> Renaming it from ST to FCH in previous patch of the series.
> 

So it won't compile if the first patch is applied and then this patch
isn't? Please compile test each patch in succession.