[PATCH v4 04/24] clk: tegra30: add CSI pad clock gates
From: Svyatoslav Ryhel <hidden>
Date: 2025-10-08 07:31:22
Also in:
dri-devel, linux-clk, linux-gpio, linux-media, linux-staging, linux-tegra, lkml
Subsystem:
common clk framework, tegra clock driver, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Prashant Gaikwad, Linus Torvalds
Tegra30 has CSI pad bits in both PLLD and PLLD2 clocks that are required for the correct work of the CSI block. Add CSI pad A and pad B clock gates with PLLD/PLLD2 parents, respectively. Add a plld2 spinlock, like one plld uses, to prevent simultaneous access since both the PLLDx and CSIx_PAD clocks use the same registers Signed-off-by: Svyatoslav Ryhel <redacted> Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com> --- drivers/clk/tegra/clk-tegra30.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/clk/tegra/clk-tegra30.c b/drivers/clk/tegra/clk-tegra30.c
index ca738bc64615..61fe527ee6c1 100644
--- a/drivers/clk/tegra/clk-tegra30.c
+++ b/drivers/clk/tegra/clk-tegra30.c@@ -154,6 +154,7 @@ static unsigned long input_freq; static DEFINE_SPINLOCK(cml_lock); static DEFINE_SPINLOCK(pll_d_lock); +static DEFINE_SPINLOCK(pll_d2_lock); #define TEGRA_INIT_DATA_MUX(_name, _parents, _offset, \ _clk_num, _gate_flags, _clk_id) \
@@ -859,7 +860,7 @@ static void __init tegra30_pll_init(void) /* PLLD2 */ clk = tegra_clk_register_pll("pll_d2", "pll_ref", clk_base, pmc_base, 0, - &pll_d2_params, NULL); + &pll_d2_params, &pll_d2_lock); clks[TEGRA30_CLK_PLL_D2] = clk; /* PLLD2_OUT0 */
@@ -1008,6 +1009,16 @@ static void __init tegra30_periph_clk_init(void) 0, 48, periph_clk_enb_refcnt); clks[TEGRA30_CLK_DSIA] = clk; + /* csia_pad */ + clk = clk_register_gate(NULL, "csia_pad", "pll_d", CLK_SET_RATE_PARENT, + clk_base + PLLD_BASE, 26, 0, &pll_d_lock); + clks[TEGRA30_CLK_CSIA_PAD] = clk; + + /* csib_pad */ + clk = clk_register_gate(NULL, "csib_pad", "pll_d2", CLK_SET_RATE_PARENT, + clk_base + PLLD2_BASE, 26, 0, &pll_d2_lock); + clks[TEGRA30_CLK_CSIB_PAD] = clk; + /* csus */ clk = tegra_clk_register_periph_gate("csus", "vi_sensor", 0, clk_base, 0, TEGRA30_CLK_CSUS,
--
2.48.1