Re: [PATCH v4 2/8] clk: qcom: Add Global Clock controller (GCC) driver for IPQ5018

From: Robert Marko
Date: Thu May 11 2023 - 06:55:57 EST



+
+static const struct freq_tbl ftbl_sdcc1_apps_clk_src[] = {
+ F(143713, P_XO, 1, 1, 167),
+ F(400000, P_XO, 1, 1, 60),
+ F(24000000, P_XO, 1, 0, 0),
+ F(48000000, P_GPLL2, 12, 1, 2),
+ F(96000000, P_GPLL2, 12, 0, 0),
+ F(177777778, P_GPLL0, 1, 2, 9),
+ F(192000000, P_GPLL2, 6, 0, 0),
+ F(200000000, P_GPLL0, 4, 0, 0),
+ { }
+};
+
+static struct clk_rcg2 sdcc1_apps_clk_src = {
+ .cmd_rcgr = 0x42004,
+ .freq_tbl = ftbl_sdcc1_apps_clk_src,
+ .mnd_width = 8,
+ .hid_width = 5,
+ .parent_map = gcc_xo_gpll0_gpll2_gpll0_out_main_div2_map,
+ .clkr.hw.init = &(struct clk_init_data) {
+ .name = "sdcc1_apps_clk_src",
+ .parent_data = gcc_xo_gpll0_gpll2_gpll0_out_main_div2,
+ .num_parents = ARRAY_SIZE(gcc_xo_gpll0_gpll2_gpll0_out_main_div2),
+ .ops = &clk_rcg2_ops,
Hi,
SDCC clocks should be using "clk_rcg2_floor_ops" to round down and avoid overclocking
the cards and kernel will warn about it:
[    1.016194] mmc0: Card appears overclocked; req 52000000 Hz, actual 96000000 Hz
[    1.016278] mmc0: Card appears overclocked; req 52000000 Hz, actual 96000000 Hz

Regards,
Robert