diff options
Diffstat (limited to 'drivers/clk/imx/clk-scu.c')
| -rw-r--r-- | drivers/clk/imx/clk-scu.c | 46 |
1 files changed, 33 insertions, 13 deletions
diff --git a/drivers/clk/imx/clk-scu.c b/drivers/clk/imx/clk-scu.c index 85041e339515..b1dd0c08e091 100644 --- a/drivers/clk/imx/clk-scu.c +++ b/drivers/clk/imx/clk-scu.c @@ -9,11 +9,13 @@ #include <linux/bsearch.h> #include <linux/clk-provider.h> #include <linux/err.h> -#include <linux/of_platform.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", @@ -695,17 +712,13 @@ struct clk_hw *imx_clk_scu_alloc_dev(const char *name, } ret = platform_device_add_data(pdev, &clk, sizeof(clk)); - if (ret) { - platform_device_put(pdev); - return ERR_PTR(ret); - } + if (ret) + goto put_device; ret = driver_set_override(&pdev->dev, &pdev->driver_override, "imx-scu-clk", strlen("imx-scu-clk")); - if (ret) { - platform_device_put(pdev); - return ERR_PTR(ret); - } + if (ret) + goto put_device; ret = imx_clk_scu_attach_pd(&pdev->dev, rsrc_id); if (ret) @@ -713,13 +726,15 @@ struct clk_hw *imx_clk_scu_alloc_dev(const char *name, name, ret); ret = platform_device_add(pdev); - if (ret) { - platform_device_put(pdev); - return ERR_PTR(ret); - } + if (ret) + goto put_device; /* For API backwards compatiblilty, simply return NULL for success */ return NULL; + +put_device: + platform_device_put(pdev); + return ERR_PTR(ret); } void imx_clk_scu_unregister(void) @@ -869,6 +884,11 @@ 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); |