From 3ff86050da41e072dd9fffc373c4f5691573cf4e Mon Sep 17 00:00:00 2001 From: Jan Remmet Date: Mon, 2 Dec 2019 14:41:19 +0100 Subject: [PATCH] clk: imx6q: disable non functional divider The /2 divider between pll4_audio_div and pll4_post_div is not working on imx6q. The frequency is not halved as reported by the clock tree and measured on clko. In the technical reference manual the divider was removed in revision 4. It's also not listed in the imx6qp manual. imx6dl manual mentions a divider for PLL4 and the according register description. So keep the divider here. Signed-off-by: Jan Remmet Signed-off-by: Shawn Guo --- drivers/clk/imx/clk-imx6q.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/clk/imx/clk-imx6q.c b/drivers/clk/imx/clk-imx6q.c index 60f2de8..ba33c79 100644 --- a/drivers/clk/imx/clk-imx6q.c +++ b/drivers/clk/imx/clk-imx6q.c @@ -598,7 +598,10 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node) } hws[IMX6QDL_CLK_PLL4_POST_DIV] = clk_hw_register_divider_table(NULL, "pll4_post_div", "pll4_audio", CLK_SET_RATE_PARENT, base + 0x70, 19, 2, 0, post_div_table, &imx_ccm_lock); - hws[IMX6QDL_CLK_PLL4_AUDIO_DIV] = clk_hw_register_divider(NULL, "pll4_audio_div", "pll4_post_div", CLK_SET_RATE_PARENT, base + 0x170, 15, 1, 0, &imx_ccm_lock); + if (clk_on_imx6q() || clk_on_imx6qp()) + hws[IMX6QDL_CLK_PLL4_AUDIO_DIV] = imx_clk_hw_fixed_factor("pll4_audio_div", "pll4_post_div", 1, 1); + else + hws[IMX6QDL_CLK_PLL4_AUDIO_DIV] = clk_hw_register_divider(NULL, "pll4_audio_div", "pll4_post_div", CLK_SET_RATE_PARENT, base + 0x170, 15, 1, 0, &imx_ccm_lock); hws[IMX6QDL_CLK_PLL5_POST_DIV] = clk_hw_register_divider_table(NULL, "pll5_post_div", "pll5_video", CLK_SET_RATE_PARENT, base + 0xa0, 19, 2, 0, post_div_table, &imx_ccm_lock); hws[IMX6QDL_CLK_PLL5_VIDEO_DIV] = clk_hw_register_divider_table(NULL, "pll5_video_div", "pll5_post_div", CLK_SET_RATE_PARENT, base + 0x170, 30, 2, 0, video_div_table, &imx_ccm_lock); -- 2.7.4