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clk: mxl: Fix a clk entry by adding relevant flags

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[ Upstream commit 106ef3bda21006fe37b62c85931230a6355d78d3 ]

One of the clock entry "dcl" clk has some HW limitations. One is that
its rate can only by changed by changing its parent clk's rate & two is
that HW does not support enable/disable for this clk.

Handle above two limitations by adding relevant flags. Add standard flag
CLK_SET_RATE_PARENT to handle rate change and add driver internal flag
DIV_CLK_NO_MASK to handle enable/disable.

Fixes: d058fd9e8984 ("clk: intel: Add CGU clock driver for a new SoC")
Reviewed-by: Yi xin Zhu <yzhu@maxlinear.com>
Signed-off-by: Rahul Tanwar <rtanwar@maxlinear.com>
Link: https://lore.kernel.org/r/a4770e7225f8a0c03c8ab2ba80434a4e8e9afb17.1665642720.git.rtanwar@maxlinear.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Rahul Tanwar 2022-10-13 14:48:33 +08:00 committed by Greg Kroah-Hartman
parent a0583edea4
commit 8ae31d3651
3 changed files with 6 additions and 4 deletions
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5
drivers/clk/x86/clk-cgu.c
View File

@ -164,8 +164,9 @@ static int lgm_clk_divider_enable_disable(struct clk_hw *hw, int enable)
{
struct lgm_clk_divider *div = to_lgm_clk_divider(hw);
lgm_set_clk_val(div->membase, div->reg, div->shift_gate,
div->width_gate, enable);
if (div->flags != DIV_CLK_NO_MASK)
lgm_set_clk_val(div->membase, div->reg, div->shift_gate,
div->width_gate, enable);
return 0;
}

1
drivers/clk/x86/clk-cgu.h
View File

@ -198,6 +198,7 @@ struct lgm_clk_branch {
#define CLOCK_FLAG_VAL_INIT BIT(16)
#define MUX_CLK_SW BIT(17)
#define GATE_CLK_HW BIT(18)
#define DIV_CLK_NO_MASK BIT(19)
#define LGM_MUX(_id, _name, _pdata, _f, _reg, \
_shift, _width, _cf, _v) \

4
drivers/clk/x86/clk-lgm.c
View File

@ -255,8 +255,8 @@ static const struct lgm_clk_branch lgm_branch_clks[] = {
LGM_FIXED(LGM_CLK_SLIC, "slic", NULL, 0, CGU_IF_CLK1,
8, 2, CLOCK_FLAG_VAL_INIT, 8192000, 2),
LGM_FIXED(LGM_CLK_DOCSIS, "v_docsis", NULL, 0, 0, 0, 0, 0, 16000000, 0),
LGM_DIV(LGM_CLK_DCL, "dcl", "v_ifclk", 0, CGU_PCMCR,
25, 3, 0, 0, 0, 0, dcl_div),
LGM_DIV(LGM_CLK_DCL, "dcl", "v_ifclk", CLK_SET_RATE_PARENT, CGU_PCMCR,
25, 3, 0, 0, DIV_CLK_NO_MASK, 0, dcl_div),
LGM_MUX(LGM_CLK_PCM, "pcm", pcm_p, 0, CGU_C55_PCMCR,
0, 1, CLK_MUX_ROUND_CLOSEST, 0),
LGM_FIXED_FACTOR(LGM_CLK_DDR_PHY, "ddr_phy", "ddr",