From: Peng Fan Date: Tue, 30 Aug 2022 03:31:33 +0000 (+0800) Subject: clk: imx: clk-composite-93: check white_list X-Git-Tag: v6.6.17~6338^2~6^6~1^2~4 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2b66f02e2de174c2a9bdf60160a1d9963dc7ca2c;p=platform%2Fkernel%2Flinux-rpi.git clk: imx: clk-composite-93: check white_list The CCM ROOT AUTHEN register WHITE_LIST indicate: Each bit in this field represent for one domain. Bit16~Bit31 represent for DOMAIN0~DOMAIN15 respectively. Only corresponding bit of the domains is set to 1 can change the registers of this Clock Root. i.MX93 DID is 3, so if BIT(3 + WHITE_LIST_SHIFT) is 0, the clk should be set to read only. To make the imx93_clk_composite_flags be reusable, add a new parameter named did(domain id); Signed-off-by: Peng Fan Reviewed-by: Ye Li Reviewed-by: Jacky Bai Reviewed-by: Abel Vesa Signed-off-by: Abel Vesa Link: https://lore.kernel.org/r/20220830033137.4149542-5-peng.fan@oss.nxp.com --- diff --git a/drivers/clk/imx/clk-composite-93.c b/drivers/clk/imx/clk-composite-93.c index 19f4037..74a66b0 100644 --- a/drivers/clk/imx/clk-composite-93.c +++ b/drivers/clk/imx/clk-composite-93.c @@ -28,6 +28,8 @@ #define TZ_NS_SHIFT 9 #define TZ_NS_MASK BIT(9) +#define WHITE_LIST_SHIFT 16 + static int imx93_clk_composite_wait_ready(struct clk_hw *hw, void __iomem *reg) { int ret; @@ -180,7 +182,7 @@ static const struct clk_ops imx93_clk_composite_mux_ops = { }; struct clk_hw *imx93_clk_composite_flags(const char *name, const char * const *parent_names, - int num_parents, void __iomem *reg, + int num_parents, void __iomem *reg, u32 domain_id, unsigned long flags) { struct clk_hw *hw = ERR_PTR(-ENOMEM), *mux_hw; @@ -189,6 +191,7 @@ struct clk_hw *imx93_clk_composite_flags(const char *name, const char * const *p struct clk_gate *gate = NULL; struct clk_mux *mux = NULL; bool clk_ro = false; + u32 authen; mux = kzalloc(sizeof(*mux), GFP_KERNEL); if (!mux) @@ -211,7 +214,8 @@ struct clk_hw *imx93_clk_composite_flags(const char *name, const char * const *p div->lock = &imx_ccm_lock; div->flags = CLK_DIVIDER_ROUND_CLOSEST; - if (!(readl(reg + AUTHEN_OFFSET) & TZ_NS_MASK)) + authen = readl(reg + AUTHEN_OFFSET); + if (!(authen & TZ_NS_MASK) || !(authen & BIT(WHITE_LIST_SHIFT + domain_id))) clk_ro = true; if (clk_ro) { diff --git a/drivers/clk/imx/clk-imx93.c b/drivers/clk/imx/clk-imx93.c index f5c9fa4..151b205 100644 --- a/drivers/clk/imx/clk-imx93.c +++ b/drivers/clk/imx/clk-imx93.c @@ -293,7 +293,7 @@ static int imx93_clocks_probe(struct platform_device *pdev) root = &root_array[i]; clks[root->clk] = imx93_clk_composite_flags(root->name, parent_names[root->sel], - 4, base + root->off, + 4, base + root->off, 3, root->flags); } diff --git a/drivers/clk/imx/clk.h b/drivers/clk/imx/clk.h index 5061a06..396a5ea 100644 --- a/drivers/clk/imx/clk.h +++ b/drivers/clk/imx/clk.h @@ -445,9 +445,10 @@ struct clk_hw *imx93_clk_composite_flags(const char *name, const char * const *parent_names, int num_parents, void __iomem *reg, + u32 domain_id, unsigned long flags); -#define imx93_clk_composite(name, parent_names, num_parents, reg) \ - imx93_clk_composite_flags(name, parent_names, num_parents, reg, \ +#define imx93_clk_composite(name, parent_names, num_parents, reg, domain_id) \ + imx93_clk_composite_flags(name, parent_names, num_parents, reg, domain_id \ CLK_SET_RATE_NO_REPARENT | CLK_OPS_PARENT_ENABLE) struct clk_hw *imx_clk_hw_divider_gate(const char *name, const char *parent_name,