Messages in this thread Patch in this message | | | From | Vishnu Patekar <> | Subject | [PATCH 2/2] clk: sunxi: add prediv table for a31 ahb1 clock | Date | Sun, 17 Apr 2016 02:55:06 +0800 |
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For ahb1 clock, move mshift and mwidth to parent specific width and shift. getter differentiates parents with prediv, with non-zero prediv width.
Also, removed unused ahb1 recalc function, it's now handled in generic factors recalc.
Signed-off-by: Vishnu Patekar <vishnupatekar0510@gmail.com> --- drivers/clk/sunxi/clk-sunxi.c | 31 +++++++++---------------------- 1 file changed, 9 insertions(+), 22 deletions(-)
diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c index 91de0a0..5a5f26b 100644 --- a/drivers/clk/sunxi/clk-sunxi.c +++ b/drivers/clk/sunxi/clk-sunxi.c @@ -282,8 +282,6 @@ static void sun5i_a13_get_ahb_factors(struct factors_request *req) req->p = div; } -#define SUN6I_AHB1_PARENT_PLL6 3 - /** * sun6i_a31_get_ahb_factors() - calculates m, p factors for AHB * AHB rate is calculated as follows @@ -307,7 +305,7 @@ static void sun6i_get_ahb1_factors(struct factors_request *req) div = DIV_ROUND_UP(req->parent_rate, req->rate); /* calculate pre-divider if parent is pll6 */ - if (req->parent_index == SUN6I_AHB1_PARENT_PLL6) { + if (req->prediv_width) { if (div < 4) calcp = 0; else if (div / 2 < 4) @@ -329,22 +327,6 @@ static void sun6i_get_ahb1_factors(struct factors_request *req) } /** - * sun6i_ahb1_recalc() - calculates AHB clock rate from m, p factors and - * parent index - */ -static void sun6i_ahb1_recalc(struct factors_request *req) -{ - req->rate = req->parent_rate; - - /* apply pre-divider first if parent is pll6 */ - if (req->parent_index == SUN6I_AHB1_PARENT_PLL6) - req->rate /= req->m + 1; - - /* clk divider */ - req->rate >>= req->p; -} - -/** * sun4i_get_apb1_factors() - calculates m, p factors for APB1 * APB1 rate is calculated as follows * rate = (parent_rate >> p) / (m + 1); @@ -474,12 +456,17 @@ static const struct clk_factors_config sun5i_a13_ahb_config = { }; static const struct clk_factors_config sun6i_ahb1_config = { - .mshift = 6, - .mwidth = 2, .pshift = 4, .pwidth = 2, }; +static const struct clk_factors_prediv sun6i_ahb1_prediv[] = { + {.parent_index = 0, .shift = 0, .width = 0 }, /* LOSC */ + {.parent_index = 1, .shift = 0, .width = 0 }, /* OSC24MHz */ + {.parent_index = 2, .shift = 0, .width = 0 }, /* AXI */ + {.parent_index = 3, .shift = 6, .width = 2 } /* PLL6/Pre_div */ +}; + static const struct clk_factors_config sun4i_apb1_config = { .mshift = 0, .mwidth = 5, @@ -551,8 +538,8 @@ static const struct factors_data sun6i_ahb1_data __initconst = { .mux = 12, .muxmask = BIT(1) | BIT(0), .table = &sun6i_ahb1_config, + .prediv_table = sun6i_ahb1_prediv, .getter = sun6i_get_ahb1_factors, - .recalc = sun6i_ahb1_recalc, }; static const struct factors_data sun4i_apb1_data __initconst = { -- 1.9.1
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