AMD SoC exposes clock for general purpose use. The clock registration
is done in clk-st driver. The MMIO mapping are passed on to the
clock driver for accessing the registers.
The misc clock handler will create MMIO mappings to access the
clock registers and enable the clock driver to expose the clock
for use of drivers which will connect to it.
Signed-off-by: Akshu Agrawal <[email protected]>
---
drivers/acpi/acpi_apd.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 54 insertions(+)
diff --git a/drivers/acpi/acpi_apd.c b/drivers/acpi/acpi_apd.c
index d553b00..6328031 100644
--- a/drivers/acpi/acpi_apd.c
+++ b/drivers/acpi/acpi_apd.c
@@ -11,6 +11,7 @@
*/
#include <linux/clk-provider.h>
+#include <linux/platform_data/clk-st.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/clkdev.h>
@@ -72,6 +73,54 @@ static int acpi_apd_setup(struct apd_private_data *pdata)
}
#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
+
+static int misc_check_res(struct acpi_resource *ares, void *data)
+{
+ struct resource res;
+
+ return !acpi_dev_resource_memory(ares, &res);
+}
+
+static int st_misc_setup(struct apd_private_data *pdata)
+{
+ struct acpi_device *adev = pdata->adev;
+ struct platform_device *clkdev;
+ struct st_clk_data *clk_data;
+ struct resource_entry *rentry;
+ struct list_head resource_list;
+ int ret;
+
+ clk_data = devm_kzalloc(&adev->dev, sizeof(*clk_data), GFP_KERNEL);
+ if (!clk_data)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&resource_list);
+ ret = acpi_dev_get_resources(adev, &resource_list, misc_check_res,
+ NULL);
+ if (ret < 0) {
+ devm_kfree(&adev->dev, clk_data);
+ return -ENOMEM;
+ }
+
+ list_for_each_entry(rentry, &resource_list, node) {
+ clk_data->base = ioremap(rentry->res->start,
+ resource_size(rentry->res));
+ break;
+ }
+
+ acpi_dev_free_resource_list(&resource_list);
+
+ clkdev = platform_device_register_data(&adev->dev, "clk-st",
+ PLATFORM_DEVID_NONE, clk_data,
+ sizeof(*clk_data));
+ if (IS_ERR(clkdev)) {
+ kfree(clk_data);
+ return PTR_ERR(clkdev);
+ }
+
+ return 0;
+}
+
static const struct apd_device_desc cz_i2c_desc = {
.setup = acpi_apd_setup,
.fixed_clk_rate = 133000000,
@@ -94,6 +143,10 @@ static int acpi_apd_setup(struct apd_private_data *pdata)
.fixed_clk_rate = 48000000,
.properties = uart_properties,
};
+
+static const struct apd_device_desc st_misc_desc = {
+ .setup = st_misc_setup,
+};
#endif
#ifdef CONFIG_ARM64
@@ -179,6 +232,7 @@ static int acpi_apd_create_device(struct acpi_device *adev,
{ "AMD0020", APD_ADDR(cz_uart_desc) },
{ "AMDI0020", APD_ADDR(cz_uart_desc) },
{ "AMD0030", },
+ { "AMD0040", APD_ADDR(st_misc_desc)},
#endif
#ifdef CONFIG_ARM64
{ "APMC0D0F", APD_ADDR(xgene_i2c_desc) },
--
1.9.1
Hi Akshu,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on pm/linux-next]
[also build test ERROR on v4.17-rc3 next-20180426]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Akshu-Agrawal/ACPI-APD-Add-AMD-misc-clock-handler-support/20180430-152810
base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: x86_64-acpi-redef (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64
All errors (new ones prefixed by >>):
>> drivers//acpi/acpi_apd.c:14:10: fatal error: linux/platform_data/clk-st.h: No such file or directory
#include <linux/platform_data/clk-st.h>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
vim +14 drivers//acpi/acpi_apd.c
> 14 #include <linux/platform_data/clk-st.h>
15 #include <linux/platform_device.h>
16 #include <linux/pm_domain.h>
17 #include <linux/clkdev.h>
18 #include <linux/acpi.h>
19 #include <linux/err.h>
20 #include <linux/pm.h>
21
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
On 4/30/2018 2:23 PM, kbuild test robot wrote:
> Hi Akshu,
>
> Thank you for the patch! Yet something to improve:
>
> [auto build test ERROR on pm/linux-next]
> [also build test ERROR on v4.17-rc3 next-20180426]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
>
> url: https://github.com/0day-ci/linux/commits/Akshu-Agrawal/ACPI-APD-Add-AMD-misc-clock-handler-support/20180430-152810
> base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
> config: x86_64-acpi-redef (attached as .config)
> compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
> reproduce:
> # save the attached .config to linux build tree
> make ARCH=x86_64
>
> All errors (new ones prefixed by >>):
>
>>> drivers//acpi/acpi_apd.c:14:10: fatal error: linux/platform_data/clk-st.h: No such file or directory
> #include <linux/platform_data/clk-st.h>
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> compilation terminated.
>
This patch is dependent on https://patchwork.kernel.org/patch/10370955/
The above patch adds the required include file.
Thanks,
Akshu
> vim +14 drivers//acpi/acpi_apd.c
>
> > 14 #include <linux/platform_data/clk-st.h>
> 15 #include <linux/platform_device.h>
> 16 #include <linux/pm_domain.h>
> 17 #include <linux/clkdev.h>
> 18 #include <linux/acpi.h>
> 19 #include <linux/err.h>
> 20 #include <linux/pm.h>
> 21
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation
>
On Monday, April 30, 2018 11:40:08 AM CEST Agrawal, Akshu wrote:
>
> On 4/30/2018 2:23 PM, kbuild test robot wrote:
> > Hi Akshu,
> >
> > Thank you for the patch! Yet something to improve:
> >
> > [auto build test ERROR on pm/linux-next]
> > [also build test ERROR on v4.17-rc3 next-20180426]
> > [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
> >
> > url: https://github.com/0day-ci/linux/commits/Akshu-Agrawal/ACPI-APD-Add-AMD-misc-clock-handler-support/20180430-152810
> > base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
> > config: x86_64-acpi-redef (attached as .config)
> > compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
> > reproduce:
> > # save the attached .config to linux build tree
> > make ARCH=x86_64
> >
> > All errors (new ones prefixed by >>):
> >
> >>> drivers//acpi/acpi_apd.c:14:10: fatal error: linux/platform_data/clk-st.h: No such file or directory
> > #include <linux/platform_data/clk-st.h>
> > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > compilation terminated.
> >
>
> This patch is dependent on https://patchwork.kernel.org/patch/10370955/
> The above patch adds the required include file.
So please resend it when the requisite patch is merged and add the dependency
information to its changelog.
Thanks,
Rafael