diff options
Diffstat (limited to 'drivers/clk/imx/clk-scu.c')
| -rw-r--r-- | drivers/clk/imx/clk-scu.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/clk/imx/clk-scu.c b/drivers/clk/imx/clk-scu.c index cd83c52e99..e48a904c00 100644 --- a/drivers/clk/imx/clk-scu.c +++ b/drivers/clk/imx/clk-scu.c @@ -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 +886,11 @@ 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)) { + kfree(clk_node); + return NULL; + } + clk = kzalloc(sizeof(*clk), GFP_KERNEL); if (!clk) { kfree(clk_node); |