kernel.git/drivers/clk/spacemit, branch linux-rolling-stable

clk: spacemit: Respect Kconfig setting when building modules

2026-02-26T23:01:19Z

[ Upstream commit 5ec8cbbc54c82c0bdae4dbf0e5aecf9817bde2b9 ] Currently, the SPACEMIT_CCU entry is only a switch for enabling entry SPACEMIT_K1_CCU. It does not guide the build for common clock codes even if it is a tristate entry. This makes this entry useless. Change the Makefile to add a separate build for common clock logic, so the SPACEMIT_CCU entry takes effect, also add necessary MODULE_LICENSE()/MODULE_DESCRIPTION()/EXPORT_SYMBOL() for the module build. Fixes: 1b72c59db0ad ("clk: spacemit: Add clock support for SpacemiT K1 SoC") Signed-off-by: Inochi Amaoto Reviewed-by: Yixun Lan Link: https://lore.kernel.org/r/20251219012819.440972-2-inochiama@gmail.com Signed-off-by: Yixun Lan Signed-off-by: Sasha Levin

clk: spacemit: Set clk_hw_onecell_data::num before using flex array

2025-11-21T03:02:16Z

When booting with KASAN enabled the following splat is encountered during probe of the k1 clock driver: UBSAN: array-index-out-of-bounds in drivers/clk/spacemit/ccu-k1.c:1044:16 index 0 is out of range for type 'clk_hw *[*]' CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.18.0-rc5+ #1 PREEMPT(lazy) Hardware name: Unknown Unknown Product/Unknown Product, BIOS 2022.10spacemit 10/01/2022 Call Trace: [] dump_backtrace+0x28/0x38 [] show_stack+0x3a/0x50 [] dump_stack_lvl+0x5a/0x80 [] dump_stack+0x18/0x20 [] ubsan_epilogue+0x10/0x48 [] __ubsan_handle_out_of_bounds+0xa6/0xa8 [] k1_ccu_probe+0x37e/0x420 [] platform_probe+0x56/0x98 [] really_probe+0x9e/0x350 [] __driver_probe_device+0x80/0x138 [] driver_probe_device+0x3a/0xd0 [] __driver_attach+0xac/0x1b8 [] bus_for_each_dev+0x6c/0xc8 [] driver_attach+0x26/0x38 [] bus_add_driver+0x13e/0x268 [] driver_register+0x52/0x100 [] __platform_driver_register+0x28/0x38 [] k1_ccu_driver_init+0x22/0x38 [] do_one_initcall+0x62/0x2a0 [] do_initcalls+0x170/0x1a8 [] kernel_init_freeable+0x16a/0x1e0 [] kernel_init+0x2c/0x180 [] ret_from_fork_kernel+0x16/0x1d8 [] ret_from_fork_kernel_asm+0x16/0x18 ---[ end trace ]--- This is bogus and is simply a result of KASAN consulting the `.num` member of the struct for bounds information (as it should due to `__counted_by`) and finding 0 set by kzalloc() because it has not been initialized before the loop that fills in the array. The easy fix is to just move the line that sets `num` to before the loop that fills the array so that KASAN has the information it needs to accurately conclude that the access is valid. Fixes: 1b72c59db0add ("clk: spacemit: Add clock support for SpacemiT K1 SoC") Tested-by: Yanko Kaneti Signed-off-by: Charles Mirabile Reviewed-by: Alex Elder Reviewed-by: Troy Mitchell Reviewed-by: Yixun Lan Signed-off-by: Stephen Boyd

clk: spacemit: fix comment typo

2025-11-14T02:19:51Z

Fix incorrect comment to match the filename. Reviewd-by: Troy Mitchell Signed-off-by: Encrow Thorne Reviewed-by: Yixun Lan Signed-off-by: Stephen Boyd

clk: spacemit: fix i2s clock

2025-09-20T05:54:46Z

Defining i2s_bclk and i2s_sysclk as fixed-rate clocks is insufficient for real I2S use cases. Moreover, the current I2S clock configuration does not work as expected due to missing parent clocks. This patch adds the missing parent clocks, defines i2s_sysclk as a DDN clock, and i2s_bclk as a DIV clock. A special note for i2s_bclk: From the register definition, the i2s_bclk divider always implies an additional 1/2 factor. The following table shows the correspondence between index and frequency division coefficients: | index | div | |-------|-------| | 0 | 2 | | 1 | 4 | | 2 | 6 | | 3 | 8 | From a software perspective, introducing i2s_bclk_factor as the parent of i2s_bclk is sufficient to address the issue. The I2S-related clock registers can be found here [1]. Link: https://developer.spacemit.com/documentation?token=LCrKwWDasiJuROkVNusc2pWTnEb [1] Fixes: 1b72c59db0add ("clk: spacemit: Add clock support for SpacemiT K1 SoC") Co-developer: Jinmei Wei Suggested-by: Haylen Chu Signed-off-by: Jinmei Wei Signed-off-by: Troy Mitchell Signed-off-by: Stephen Boyd

clk: spacemit: introduce pre-div for ddn clock

2025-09-20T05:54:44Z

The original DDN operations applied an implicit divide-by-2, which should not be a default behavior. This patch removes that assumption, letting each clock define its actual behavior explicitly. Reviewed-by: Haylen Chu Signed-off-by: Troy Mitchell Signed-off-by: Stephen Boyd

clk: spacemit: ccu_pll: convert from round_rate() to determine_rate()

2025-08-25T22:07:45Z

The round_rate() clk ops is deprecated, so migrate this driver from round_rate() to determine_rate() using the Coccinelle semantic patch on the cover letter of this series. Signed-off-by: Brian Masney Reviewed-by: Haylen Chu Reviewed-by: Yixun Lan Link: https://lore.kernel.org/r/20250811-clk-for-stephen-round-rate-v1-51-b3bf97b038dc@redhat.com Signed-off-by: Yixun Lan

clk: spacemit: ccu_mix: convert from round_rate() to determine_rate()

2025-08-25T22:07:41Z

clk: spacemit: ccu_ddn: convert from round_rate() to determine_rate()

2025-08-25T22:07:38Z

The round_rate() clk ops is deprecated, so migrate this driver from round_rate() to determine_rate() using the Coccinelle semantic patch on the cover letter of this series. Signed-off-by: Brian Masney Reviewed-by: Haylen Chu Reviewed-by: Yixun Lan Link: https://lore.kernel.org/r/20250811-clk-for-stephen-round-rate-v1-49-b3bf97b038dc@redhat.com Signed-off-by: Yixun Lan

clk: spacemit: fix sspax_clk

2025-08-24T07:42:31Z

Hardware Requirement: BIT[3] of this register must be set if need to select i2s_bclk as SSPA parent clock, to solve this, introduces a new SSPAx_I2S_BCLK clock as the virtual gate clock. Fixes: 1b72c59db0add ("clk: spacemit: Add clock support for SpacemiT K1 SoC") Suggested-by: Yao Zi Reviewed-by: Haylen Chu Signed-off-by: Troy Mitchell Link: https://lore.kernel.org/r/20250811-k1-clk-i2s-v5-2-ebadd06e1e91@linux.spacemit.com Signed-off-by: Yixun Lan

clk: spacemit: ccu_pll: fix error return value in recalc_rate callback

2025-07-25T02:36:15Z

Return 0 instead of -EINVAL if function ccu_pll_recalc_rate() fails to get correct rate entry. Follow .recalc_rate callback documentation as mentioned in include/linux/clk-provider.h for error return value. Signed-off-by: Akhilesh Patil Fixes: 1b72c59db0add ("clk: spacemit: Add clock support for SpacemiT K1 SoC") Reviewed-by: Haylen Chu Reviewed-by: Alex Elder Link: https://lore.kernel.org/r/aIBzVClNQOBrjIFG@bhairav-test.ee.iitb.ac.in Signed-off-by: Stephen Boyd