tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 46064348cc445799cf9e8fd030323a0426fbb5e4 commit: c9198a0f5708ba5f1247256dd8af19cb1be30c55 [1613/1613] clk: imx: composite-7ulp: Check the PCC present bit config: loongarch-randconfig-r111-20241210 (https://download.01.org/0day-ci/archive/20241218/202412181102.2njg5nzI-lkp@i...) compiler: loongarch64-linux-gcc (GCC) 14.2.0 reproduce: (https://download.01.org/0day-ci/archive/20241218/202412181102.2njg5nzI-lkp@i...) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202412181102.2njg5nzI-lkp@intel.com/ sparse warnings: (new ones prefixed by >>)

...

drivers/clk/imx/clk-composite-7ulp.c:85:24: sparse: sparse: Using plain integer as NULL pointer drivers/clk/imx/clk-composite-7ulp.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/xarray.h, ...): include/linux/page-flags.h:244:46: sparse: sparse: self-comparison always evaluates to false

vim +85 drivers/clk/imx/clk-composite-7ulp.c 68 69 static struct clk_hw *imx_ulp_clk_hw_composite(const char *name, 70 const char * const *parent_names, 71 int num_parents, bool mux_present, 72 bool rate_present, bool gate_present, 73 void __iomem *reg, bool has_swrst) 74 { 75 struct clk_hw *mux_hw = NULL, *fd_hw = NULL, *gate_hw = NULL; 76 struct clk_fractional_divider *fd = NULL; 77 struct clk_gate *gate = NULL; 78 struct clk_mux *mux = NULL; 79 struct clk_hw *hw; 80 u32 val; 81 82 val = readl(reg); 83 if (!(val & PCG_PR_MASK)) { 84 pr_info("PCC PR is 0 for clk:%s, bypass\n", name);

85 return 0; 86 } 87 88 if (mux_present) { 89 mux = kzalloc(sizeof(*mux), GFP_KERNEL); 90 if (!mux) 91 return ERR_PTR(-ENOMEM); 92 mux_hw = &mux->hw; 93 mux->reg = reg; 94 mux->shift = PCG_PCS_SHIFT; 95 mux->mask = PCG_PCS_MASK; 96 if (has_swrst) 97 mux->lock = &imx_ccm_lock; 98 } 99 100 if (rate_present) { 101 fd = kzalloc(sizeof(*fd), GFP_KERNEL); 102 if (!fd) { 103 kfree(mux); 104 return ERR_PTR(-ENOMEM); 105 } 106 fd_hw = &fd->hw; 107 fd->reg = reg; 108 fd->mshift = PCG_FRAC_SHIFT; 109 fd->mwidth = PCG_FRAC_WIDTH; 110 fd->nshift = PCG_PCD_SHIFT; 111 fd->nwidth = PCG_PCD_WIDTH; 112 fd->flags = CLK_FRAC_DIVIDER_ZERO_BASED; 113 if (has_swrst) 114 fd->lock = &imx_ccm_lock; 115 } 116 117 if (gate_present) { 118 gate = kzalloc(sizeof(*gate), GFP_KERNEL); 119 if (!gate) { 120 kfree(mux); 121 kfree(fd); 122 return ERR_PTR(-ENOMEM); 123 } 124 gate_hw = &gate->hw; 125 gate->reg = reg; 126 gate->bit_idx = PCG_CGC_SHIFT; 127 if (has_swrst) 128 gate->lock = &imx_ccm_lock; 129 /* 130 * make sure clock is gated during clock tree initialization, 131 * the HW ONLY allow clock parent/rate changed with clock gated, 132 * during clock tree initialization, clocks could be enabled 133 * by bootloader, so the HW status will mismatch with clock tree 134 * prepare count, then clock core driver will allow parent/rate 135 * change since the prepare count is zero, but HW actually 136 * prevent the parent/rate change due to the clock is enabled. 137 */ 138 val = readl_relaxed(reg); 139 val &= ~(1 << PCG_CGC_SHIFT); 140 writel_relaxed(val, reg); 141 } 142 143 hw = clk_hw_register_composite(NULL, name, parent_names, num_parents, 144 mux_hw, &clk_mux_ops, fd_hw, 145 &clk_fractional_divider_ops, gate_hw, 146 has_swrst ? &pcc_gate_ops : &clk_gate_ops, CLK_SET_RATE_GATE | 147 CLK_SET_PARENT_GATE | CLK_SET_RATE_NO_REPARENT); 148 if (IS_ERR(hw)) { 149 kfree(mux); 150 kfree(fd); 151 kfree(gate); 152 } 153 154 return hw; 155 } 156

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