diff options
| author |   Paul Cercueil <paul@crapouillou.net> | 2021-05-30 17:49:19 +0100 |
|---|---|---|
| committer |   Stephen Boyd <sboyd@kernel.org> | 2021-06-27 19:49:17 -0700 |
| commit | 249592bf6d5d52cacdc2f5a07f23368fc1b11324 (patch) | |
| tree | 037c1a9a90e52d1d249d83c6996dd65214f92794 /drivers/clk/ingenic/jz4740-cgu.c | |
| parent | dt-bindings: clock: ingenic: Add ingenic,jz4760{,b}-cgu compatibles (diff) | |
| download | linux-dev-249592bf6d5d52cacdc2f5a07f23368fc1b11324.tar.xz linux-dev-249592bf6d5d52cacdc2f5a07f23368fc1b11324.zip | |
clk: Support bypassing dividers
When a clock is declared as both CGU_CLK_DIV and CGU_CLK_MUX, the CGU
code expects the mux to be applied first, the divider second.
On the JZ4760, and maybe on some other SoCs, some clocks also have a mux
setting and a divider, but the divider is not applied to all parents
selectable from the mux.
This could be solved by creating two clocks, one with CGU_CLK_DIV and
one with CGU_CLK_MUX, but that would increase the number of clocks.
Instead, add a 8-bit mask to CGU_CLK_DIV clocks. If the bit
corresponding to the parent clock's index is set, the divider is
bypassed.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20210530164923.18134-3-paul@crapouillou.net
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Diffstat (limited to 'drivers/clk/ingenic/jz4740-cgu.c')
| -rw-r--r-- | drivers/clk/ingenic/jz4740-cgu.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/clk/ingenic/jz4740-cgu.c b/drivers/clk/ingenic/jz4740-cgu.c index c0ac9196a581..cd878f08aca3 100644 --- a/drivers/clk/ingenic/jz4740-cgu.c +++ b/drivers/clk/ingenic/jz4740-cgu.c @@ -95,7 +95,7 @@ static const struct ingenic_cgu_clk_info jz4740_cgu_clocks[] = { "pll half", CGU_CLK_DIV, .parents = { JZ4740_CLK_PLL, -1, -1, -1 }, .div = { - CGU_REG_CPCCR, 21, 1, 1, -1, -1, -1, + CGU_REG_CPCCR, 21, 1, 1, -1, -1, -1, 0, jz4740_cgu_pll_half_div_table, }, }, @@ -104,7 +104,7 @@ static const struct ingenic_cgu_clk_info jz4740_cgu_clocks[] = { "cclk", CGU_CLK_DIV, .parents = { JZ4740_CLK_PLL, -1, -1, -1 }, .div = { - CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1, + CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1, 0, jz4740_cgu_cpccr_div_table, }, }, @@ -113,7 +113,7 @@ static const struct ingenic_cgu_clk_info jz4740_cgu_clocks[] = { "hclk", CGU_CLK_DIV, .parents = { JZ4740_CLK_PLL, -1, -1, -1 }, .div = { - CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1, + CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1, 0, jz4740_cgu_cpccr_div_table, }, }, @@ -122,7 +122,7 @@ static const struct ingenic_cgu_clk_info jz4740_cgu_clocks[] = { "pclk", CGU_CLK_DIV, .parents = { JZ4740_CLK_PLL, -1, -1, -1 }, .div = { - CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1, + CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1, 0, jz4740_cgu_cpccr_div_table, }, }, @@ -131,7 +131,7 @@ static const struct ingenic_cgu_clk_info jz4740_cgu_clocks[] = { "mclk", CGU_CLK_DIV, .parents = { JZ4740_CLK_PLL, -1, -1, -1 }, .div = { - CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1, + CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1, 0, jz4740_cgu_cpccr_div_table, }, }, @@ -140,7 +140,7 @@ static const struct ingenic_cgu_clk_info jz4740_cgu_clocks[] = { "lcd", CGU_CLK_DIV | CGU_CLK_GATE, .parents = { JZ4740_CLK_PLL_HALF, -1, -1, -1 }, .div = { - CGU_REG_CPCCR, 16, 1, 5, 22, -1, -1, + CGU_REG_CPCCR, 16, 1, 5, 22, -1, -1, 0, jz4740_cgu_cpccr_div_table, }, .gate = { CGU_REG_CLKGR, 10 }, |