6.1-stable review patch. If anyone has any objections, please let me know.
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From: Zhipeng Wang zhipeng.wang_1@nxp.com
[ Upstream commit 3d29036853b9cb07ac49e8261fca82a940be5c41 ]
On the i.MX8M*, the TF-A exposes a SiP (Silicon Provider) service for DDR frequency scaling. The imx8m-ddrc-devfreq driver calls the SiP and then does clk_set_parent on the DDR muxes to synchronize the clock tree.
since commit 936c383673b9 ("clk: imx: fix composite peripheral flags"), these TF-A managed muxes have SET_PARENT_GATE set, which results in imx8m-ddrc-devfreq's clk_set_parent after SiP failing with -EBUSY:
clk_set_parent(dram_apb_src, sys1_pll_40m);(busfreq-imx8mq.c)
commit 926bf91248dd ("clk: imx8m: fix clock tree update of TF-A managed clocks") adds this method and enables 8mm, 8mn and 8mq. i.MX8MP also needs it.
This is safe to do, because updating the Linux clock tree to reflect reality will always be glitch-free.
Another reason to this patch is that powersave image BT music requires dram to be 400MTS, so clk_set_parent(dram_alt_src, sys1_pll_800m); is required. Without this patch, it will not succeed.
Fixes: 936c383673b9 ("clk: imx: fix composite peripheral flags") Signed-off-by: Zhipeng Wang zhipeng.wang_1@nxp.com Reviewed-by: Ahmad Fatoum a.fatoum@pengutronix.de Signed-off-by: Peng Fan peng.fan@nxp.com Reviewed-by: Abel Vesa abel.vesa@linaro.org Link: https://lore.kernel.org/r/20240607133347.3291040-7-peng.fan@oss.nxp.com Signed-off-by: Abel Vesa abel.vesa@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/clk/imx/clk-imx8mp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/clk/imx/clk-imx8mp.c b/drivers/clk/imx/clk-imx8mp.c index 3d0d8f2c02dc1..2de49bbc40f30 100644 --- a/drivers/clk/imx/clk-imx8mp.c +++ b/drivers/clk/imx/clk-imx8mp.c @@ -550,8 +550,8 @@ static int imx8mp_clocks_probe(struct platform_device *pdev)
hws[IMX8MP_CLK_IPG_ROOT] = imx_clk_hw_divider2("ipg_root", "ahb_root", ccm_base + 0x9080, 0, 1);
- hws[IMX8MP_CLK_DRAM_ALT] = imx8m_clk_hw_composite("dram_alt", imx8mp_dram_alt_sels, ccm_base + 0xa000); - hws[IMX8MP_CLK_DRAM_APB] = imx8m_clk_hw_composite_critical("dram_apb", imx8mp_dram_apb_sels, ccm_base + 0xa080); + hws[IMX8MP_CLK_DRAM_ALT] = imx8m_clk_hw_fw_managed_composite("dram_alt", imx8mp_dram_alt_sels, ccm_base + 0xa000); + hws[IMX8MP_CLK_DRAM_APB] = imx8m_clk_hw_fw_managed_composite_critical("dram_apb", imx8mp_dram_apb_sels, ccm_base + 0xa080); hws[IMX8MP_CLK_VPU_G1] = imx8m_clk_hw_composite("vpu_g1", imx8mp_vpu_g1_sels, ccm_base + 0xa100); hws[IMX8MP_CLK_VPU_G2] = imx8m_clk_hw_composite("vpu_g2", imx8mp_vpu_g2_sels, ccm_base + 0xa180); hws[IMX8MP_CLK_CAN1] = imx8m_clk_hw_composite("can1", imx8mp_can1_sels, ccm_base + 0xa200);