Add some clocks required for UFS on MT8189 targets.

Reviewed-by: Macpaul Lin <macpaul.lin@mediatek.com>
Link: https://patch.msgid.link/20260330-mtk-genio-720-ufs-v1-3-3bad8362ed70@baylibre.com
Signed-off-by: David Lechner <dlechner@baylibre.com>

The clk_ops structures (mtk_clk_apmixedsys_ops, mtk_clk_topckgen_ops,
mtk_clk_infrasys_ops) are already declared with extern in clk-mtk.h,
which is included by this file. The forward declarations in clk-mtk.c
are therefore redundant and can be removed.

Signed-off-by: Sam Shih <sam.shih@mediatek.com>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
Link: https://patch.msgid.link/e9c95470374cb78254dacfe1d657a26f2f908981.1776326933.git.weijie.gao@mediatek.com
Signed-off-by: David Lechner <dlechner@baylibre.com>

Add grandparent device variable in mtk_find_parent_rate() to allow
the grandparent device being reused instead of calling
dev_get_parent(priv->parent) multiple times.

Signed-off-by: Sam Shih <sam.shih@mediatek.com>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
Link: https://patch.msgid.link/726ccc71593f6c224c13142a0bd4a9f6f0f81445.1776326933.git.weijie.gao@mediatek.com
Signed-off-by: David Lechner <dlechner@baylibre.com>

The refactoring in commit 00d0ff7f81bf ("clk: mediatek: refactor parent
rate lookup functions") introduced a regression where fixed PLL clocks
using mtk_clk_fixed_pll_ops are not properly recognized as valid parents
in the CLK_PARENT_APMIXED case.

Fixed PLL clocks are implemented using mtk_clk_fixed_pll_ops instead of
mtk_clk_apmixedsys_ops, but they can also serve as parent clocks in the
APMIXED domain. The parent lookup function needs to check for both
driver ops to properly resolve the parent clock device.

Add mtk_clk_fixed_pll_ops checks alongside mtk_clk_apmixedsys_ops checks
in mtk_find_parent_rate() to restore support for fixed PLL parent clocks.

Fixes: 00d0ff7f81bf ("clk: mediatek: refactor parent rate lookup functions")
Signed-off-by: Sam Shih <sam.shih@mediatek.com>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
Link: https://patch.msgid.link/923e50db696d910803828cd26b0ca0fbbfe11570.1776326933.git.weijie.gao@mediatek.com
Signed-off-by: David Lechner <dlechner@baylibre.com>

Add some VLP clocks needed by the PMIC on MT8189 and similar SoCs.

Reviewed-by: Julien Stephan <jstephan@baylibre.com>
Link: https://patch.msgid.link/20260323-mtk-mt8391-initial-support-v3-1-19dd92f4543f@baylibre.com
Signed-off-by: David Lechner <dlechner@baylibre.com>

Change the pericfg priv_auto size to mtk_clk_priv. The driver is
registered using mtk_common_clk_infrasys_init() which expect that
struct.

The old value of struct mtk_cg_priv was larger, so there was no issue
out of bounds access.

Also replace tab with space to be consistent with the surrounding code.

Reported-by: Julien Stephan <jstephan@baylibre.com>
Closes: https://lore.kernel.org/u-boot/CAEHHSvYMiCZ4jAXp6jEhg6AhZ5Dv3_Ak-8H1mT7S2FPD3_X7dw@mail.gmail.com/
Reviewed-by: Julien Stephan <jstephan@baylibre.com>
Link: https://patch.msgid.link/20260313-clk-mtk-fix-priv-auto-size-v1-1-bc649e1b301a@baylibre.com
Signed-off-by: David Lechner <dlechner@baylibre.com>

Remove the CLK_PARENT_XTAL flag and related code. These have no more
users.

Reviewed-by: Julien Stephan <jstephan@baylibre.com>
Link: https://patch.msgid.link/20260310-clk-mtk-parent-cleanup-v1-16-66175ca8f637@baylibre.com
Signed-off-by: David Lechner <dlechner@baylibre.com>

Replace all uses of CLK_XTAL with CLK_PAD_CLK26M.

This avoids declaring the same parent clock two different ways and will
eventually let us remove CLK_PARENT_XTAL completely.

Reviewed-by: Julien Stephan <jstephan@baylibre.com>
Link: https://patch.msgid.link/20260310-clk-mtk-parent-cleanup-v1-15-66175ca8f637@baylibre.com
Signed-off-by: David Lechner <dlechner@baylibre.com>

Replace all uses of CLK_XTAL with CLK_PAD_CLK26M.

This avoids declaring the same parent clock two different ways and will
eventually let us remove CLK_PARENT_XTAL completely.

Reviewed-by: Julien Stephan <jstephan@baylibre.com>
Link: https://patch.msgid.link/20260310-clk-mtk-parent-cleanup-v1-14-66175ca8f637@baylibre.com
Signed-off-by: David Lechner <dlechner@baylibre.com>