Commit Graph

9 Commits

Author SHA1 Message Date
Michal Wilczynski
50d4b157fa clk: thead: Add clock support for VO subsystem in T-HEAD TH1520 SoC
The T-Head TH1520 SoC integrates a variety of clocks for its subsystems,
including the Application Processor (AP) and the Video Output (VO) [1].
Up until now, the T-Head clock driver only supported AP clocks.

Extend the driver to provide clock functionality for the VO subsystem.
At this stage, the focus is on implementing the VO clock gates, as these
are currently the most relevant and required components for enabling and
disabling the VO subsystem functionality.  Future enhancements may
introduce additional VO-related clocks as necessary.

Link: https://openbeagle.org/beaglev-ahead/beaglev-ahead/-/blob/main/docs/TH1520%20System%20User%20Manual.pdf [1]

Reviewed-by: Drew Fustini <drew@pdp7.com>
Signed-off-by: Michal Wilczynski <m.wilczynski@samsung.com>
Signed-off-by: Drew Fustini <drew@pdp7.com>
2025-05-07 10:09:28 -07:00
Stephen Boyd
53c9c27672 Merge branch 'clk-fixes' into clk-next
* clk-fixes:
  clk: clk-loongson2: Fix the number count of clk provider
  clk: mmp2: call pm_genpd_init() only after genpd.name is set
  clk: sunxi-ng: a100: enable MMC clock reparenting
  clk: clk-imx8mp-audiomix: fix function signature
  clk: thead: Fix TH1520 emmc and shdci clock rate
2025-01-21 11:22:46 -08:00
Drew Fustini
3a43cd19f1 clk: thead: Fix cpu2vp_clk for TH1520 AP_SUBSYS clocks
cpu2vp_clk is a gate but was mistakenly in th1520_div_clks[] instead
of th1520_gate_clks[].

Fixes: ae81b69fd2 ("clk: thead: Add support for T-Head TH1520 AP_SUBSYS clocks")
Signed-off-by: Drew Fustini <dfustini@tenstorrent.com>
Link: https://lore.kernel.org/r/20241228034802.1573554-1-dfustini@tenstorrent.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2025-01-13 13:38:17 -08:00
Drew Fustini
037705e94b clk: thead: Add CLK_IGNORE_UNUSED to fix TH1520 boot
Add the CLK_IGNORE_UNUSED flag to apb_pclk, cpu2peri_x2h_clk,
perisys_apb2_hclk and perisys_apb3_hclk.

Without this flag, the boot hangs after "clk: Disabling unused clocks"
unless clk_ignore_unused is in the kernel cmdline.

Fixes: ae81b69fd2 ("clk: thead: Add support for T-Head TH1520 AP_SUBSYS clocks")
Signed-off-by: Drew Fustini <dfustini@tenstorrent.com>
Link: https://lore.kernel.org/r/20250113-th1520-clk_ignore_unused-v1-2-0b08fb813438@tenstorrent.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2025-01-13 13:38:01 -08:00
Drew Fustini
a826e53fd7 clk: thead: Fix clk gate registration to pass flags
Modify the call to devm_clk_hw_register_gate_parent_data() to actually
pass the clk flags from hw.init instead of just 0. This is necessary to
allow individual clk gates to specify their own clk flags.

Fixes: ae81b69fd2 ("clk: thead: Add support for T-Head TH1520 AP_SUBSYS clocks")
Signed-off-by: Drew Fustini <dfustini@tenstorrent.com>
Link: https://lore.kernel.org/r/20250113-th1520-clk_ignore_unused-v1-1-0b08fb813438@tenstorrent.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2025-01-13 13:38:01 -08:00
Maksim Kiselev
f4bf0b909a clk: thead: Fix TH1520 emmc and shdci clock rate
In accordance with LicheePi 4A BSP the clock that comes to emmc/sdhci
is 198Mhz which is got through frequency division of source clock
VIDEO PLL by 4 [1].

But now the AP_SUBSYS driver sets the CLK EMMC SDIO to the same
frequency as the VIDEO PLL, equal to 792 MHz. This causes emmc/sdhci
to work 4 times slower.

Let's fix this issue by adding fixed factor clock that divides
VIDEO PLL by 4 for emmc/sdhci.

Link: 7563179071/drivers/clk/thead/clk-light-fm.c (L454)

Fixes: ae81b69fd2 ("clk: thead: Add support for T-Head TH1520 AP_SUBSYS clocks")
Signed-off-by: Maksim Kiselev <bigunclemax@gmail.com>
Link: https://lore.kernel.org/r/20241210083029.92620-1-bigunclemax@gmail.com
Tested-by: Xi Ruoyao <xry111@xry111.site>
Reviewed-by: Drew Fustini <dfustini@tenstorrent.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2024-12-17 12:17:50 -08:00
Drew Fustini
39a3396558 clk: thead: fix dependency on clk_ignore_unused
Add the CLK_IGNORE_UNUSED flag to the vp-axi clock (CLK_VP_AXI) to avoid
depending on clk_ignore_unused in the cmdline. Without this fix, the
emmc-sdio clock (CLK_EMMC_SDIO) fails to work after vp-axi is disabled.

Signed-off-by: Drew Fustini <drew@pdp7.com>
Link: https://lore.kernel.org/r/20240731061439.3807172-1-drew@pdp7.com
Fixes: ae81b69fd2 ("clk: thead: Add support for T-Head TH1520 AP_SUBSYS clocks")
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2024-07-31 14:51:47 -07:00
Palmer Dabbelt
0e91ac701c clk: T-Head: Disable on 32-bit Targets
This fails to build on 32-bit targets because of a missing __udivdi3.
IIRC the right way to fix that is to avoid the division, but I just want
a tree that builds and the only real T-Head platforms are 64-bit right
now.

Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Link: https://lore.kernel.org/r/20240719151027.16152-1-palmer@rivosinc.com
Acked-by: Drew Fustini <drew@pdp7.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2024-07-22 14:29:23 -07:00
Drew Fustini
ae81b69fd2 clk: thead: Add support for T-Head TH1520 AP_SUBSYS clocks
Add support for the AP sub-system clock controller in the T-Head TH1520.
This include CPU, DPU, GMAC and TEE PLLs.

Link: https://openbeagle.org/beaglev-ahead/beaglev-ahead/-/blob/main/docs/TH1520%20System%20User%20Manual.pdf
Co-developed-by: Yangtao Li <frank.li@vivo.com>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Co-developed-by: Jisheng Zhang <jszhang@kernel.org>
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Link: https://git.beagleboard.org/beaglev-ahead/beaglev-ahead/-/tree/main/docs
Signed-off-by: Drew Fustini <dfustini@tenstorrent.com>
Link: https://lore.kernel.org/r/20240711-th1520-clk-v3-2-6ff17bb318fb@tenstorrent.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2024-07-15 12:15:01 -07:00