Kernel/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-01-18 02:46:06 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

clk: imx: scu: ignore clks not owned by Cortex-A partition

Browse Source 
Not register clks that not owned to current partition.
CPU resources are specical resources, it is assigned in ATF, not
non-secure OS, but we still need to allow cpu freq, so return
true for non-secure OS for cpu resources.

Otherwise there will be error log if the resources are owned by current
partition:
[   19.387291] cm40_i2c_div: failed to attached the power domain -2
[   19.389305] cm40_lpuart_div: failed to attached the power domain -2

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20230912-imx8-clk-v1-v1-6-69a34bcfcae1@nxp.com
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
This commit is contained in:
Peng Fan 2023-09-12 17:19:04 +08:00 committed by Abel Vesa
parent a699148b87
commit eaefd1cf36
1 changed files with 20 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/clk/imx/clk-scu.c
View File

@ -10,10 +10,12 @@
#include <linux/clk-provider.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/firmware/imx/svc/rm.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <xen/xen.h>
#include "clk-scu.h"
@ -670,6 +672,18 @@ static int imx_clk_scu_attach_pd(struct device *dev, u32 rsrc_id)
return of_genpd_add_device(&genpdspec, dev);
}
static bool imx_clk_is_resource_owned(u32 rsrc)
{
/*
* A-core resources are special. SCFW reports they are not "owned" by
* current partition but linux can still adjust them for cpufreq.
*/
if (rsrc == IMX_SC_R_A53 || rsrc == IMX_SC_R_A72 || rsrc == IMX_SC_R_A35)
return true;
return imx_sc_rm_is_resource_owned(ccm_ipc_handle, rsrc);
}
struct clk_hw *imx_clk_scu_alloc_dev(const char *name,
const char * const *parents,
int num_parents, u32 rsrc_id, u8 clk_type)
@ -687,6 +701,9 @@ struct clk_hw *imx_clk_scu_alloc_dev(const char *name,
if (!imx_scu_clk_is_valid(rsrc_id))
return ERR_PTR(-EINVAL);
if (!imx_clk_is_resource_owned(rsrc_id))
return NULL;
pdev = platform_device_alloc(name, PLATFORM_DEVID_NONE);
if (!pdev) {
pr_err("%s: failed to allocate scu clk dev rsrc %d type %d\n",
@ -869,6 +886,9 @@ struct clk_hw *__imx_clk_gpr_scu(const char *name, const char * const *parent_na
return ERR_PTR(-EINVAL);
}
if (!imx_clk_is_resource_owned(rsrc_id))
return NULL;
clk = kzalloc(sizeof(*clk), GFP_KERNEL);
if (!clk) {
kfree(clk_node);