diff options
| author | Dong Aisheng <aisheng.dong@nxp.com> | 2021-04-23 05:33:33 +0200 |
|---|---|---|
| committer | Abel Vesa <abel.vesa@nxp.com> | 2021-06-14 11:33:19 +0200 |
| commit | 5964012ce37e66d2588a9bc82f7184a008851cac (patch) | |
| tree | 890c37c2e502c4d6209764f3476c91361dfd8e27 /drivers/clk/imx/clk-scu.c | |
| parent | clk: imx: scu: add gpr clocks support (diff) | |
| download | linux-5964012ce37e66d2588a9bc82f7184a008851cac.tar.xz linux-5964012ce37e66d2588a9bc82f7184a008851cac.zip | |
clk: imx8qxp: add clock valid checking mechnism
clk-imx8qxp is a common SCU clock driver used by both QM and QXP
platforms. The clock numbers vary a bit between those two platforms.
This patch introduces a mechanism to only register the valid clocks
for one platform by checking the clk resource id table.
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
Diffstat (limited to 'drivers/clk/imx/clk-scu.c')
| -rw-r--r-- | drivers/clk/imx/clk-scu.c | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/drivers/clk/imx/clk-scu.c b/drivers/clk/imx/clk-scu.c index bd169083350c..f4efb3b76c86 100644 --- a/drivers/clk/imx/clk-scu.c +++ b/drivers/clk/imx/clk-scu.c @@ -1,11 +1,12 @@ // SPDX-License-Identifier: GPL-2.0+ /* - * Copyright 2018 NXP + * Copyright 2018-2021 NXP * Dong Aisheng <aisheng.dong@nxp.com> */ #include <dt-bindings/firmware/imx/rsrc.h> #include <linux/arm-smccc.h> +#include <linux/bsearch.h> #include <linux/clk-provider.h> #include <linux/err.h> #include <linux/of_platform.h> @@ -22,6 +23,7 @@ static struct imx_sc_ipc *ccm_ipc_handle; static struct device_node *pd_np; static struct platform_driver imx_clk_scu_driver; +static const struct imx_clk_scu_rsrc_table *rsrc_table; struct imx_scu_clk_node { const char *name; @@ -167,7 +169,26 @@ static inline struct clk_scu *to_clk_scu(struct clk_hw *hw) return container_of(hw, struct clk_scu, hw); } -int imx_clk_scu_init(struct device_node *np) +static inline int imx_scu_clk_search_cmp(const void *rsrc, const void *rsrc_p) +{ + return *(u32 *)rsrc - *(u32 *)rsrc_p; +} + +static bool imx_scu_clk_is_valid(u32 rsrc_id) +{ + void *p; + + if (!rsrc_table) + return true; + + p = bsearch(&rsrc_id, rsrc_table->rsrc, rsrc_table->num, + sizeof(rsrc_table->rsrc[0]), imx_scu_clk_search_cmp); + + return p != NULL; +} + +int imx_clk_scu_init(struct device_node *np, + const struct imx_clk_scu_rsrc_table *data) { u32 clk_cells; int ret, i; @@ -186,6 +207,8 @@ int imx_clk_scu_init(struct device_node *np) pd_np = of_find_compatible_node(NULL, NULL, "fsl,scu-pd"); if (!pd_np) return -EINVAL; + + rsrc_table = data; } return platform_driver_register(&imx_clk_scu_driver); @@ -583,6 +606,9 @@ struct clk_hw *imx_clk_scu_alloc_dev(const char *name, struct platform_device *pdev; int ret; + if (!imx_scu_clk_is_valid(rsrc_id)) + return ERR_PTR(-EINVAL); + pdev = platform_device_alloc(name, PLATFORM_DEVID_NONE); if (!pdev) { pr_err("%s: failed to allocate scu clk dev rsrc %d type %d\n", @@ -750,6 +776,9 @@ struct clk_hw *__imx_clk_gpr_scu(const char *name, const char * const *parent_na if (!clk_node) return ERR_PTR(-ENOMEM); + if (!imx_scu_clk_is_valid(rsrc_id)) + return ERR_PTR(-EINVAL); + clk = kzalloc(sizeof(*clk), GFP_KERNEL); if (!clk) { kfree(clk_node); |