Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-19 18:41:48 +00:00
Code Issues Packages Projects Releases Wiki Activity

clk: samsung: add plls used by the s3c2443

Browse Source 
The s3c2443 uses different plls that are not present yet. Therefore
add the two needed types.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Heiko Stuebner 2014-02-19 09:25:41 +09:00 committed by Kukjin Kim
parent 06654acb66
commit a951b1d91d
2 changed files with 74 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

72
drivers/clk/samsung/clk-pll.c
View File

@ -58,6 +58,72 @@ static long samsung_pll_round_rate(struct clk_hw *hw,
return rate_table[i - 1].rate;
}
/*
* PLL2126 Clock Type
*/
#define PLL2126_MDIV_MASK (0xff)
#define PLL2126_PDIV_MASK (0x3f)
#define PLL2126_SDIV_MASK (0x3)
#define PLL2126_MDIV_SHIFT (16)
#define PLL2126_PDIV_SHIFT (8)
#define PLL2126_SDIV_SHIFT (0)
static unsigned long samsung_pll2126_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 pll_con, mdiv, pdiv, sdiv;
u64 fvco = parent_rate;
pll_con = __raw_readl(pll->con_reg);
mdiv = (pll_con >> PLL2126_MDIV_SHIFT) & PLL2126_MDIV_MASK;
pdiv = (pll_con >> PLL2126_PDIV_SHIFT) & PLL2126_PDIV_MASK;
sdiv = (pll_con >> PLL2126_SDIV_SHIFT) & PLL2126_SDIV_MASK;
fvco *= (mdiv + 8);
do_div(fvco, (pdiv + 2) << sdiv);
return (unsigned long)fvco;
}
static const struct clk_ops samsung_pll2126_clk_ops = {
.recalc_rate = samsung_pll2126_recalc_rate,
};
/*
* PLL3000 Clock Type
*/
#define PLL3000_MDIV_MASK (0xff)
#define PLL3000_PDIV_MASK (0x3)
#define PLL3000_SDIV_MASK (0x3)
#define PLL3000_MDIV_SHIFT (16)
#define PLL3000_PDIV_SHIFT (8)
#define PLL3000_SDIV_SHIFT (0)
static unsigned long samsung_pll3000_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 pll_con, mdiv, pdiv, sdiv;
u64 fvco = parent_rate;
pll_con = __raw_readl(pll->con_reg);
mdiv = (pll_con >> PLL3000_MDIV_SHIFT) & PLL3000_MDIV_MASK;
pdiv = (pll_con >> PLL3000_PDIV_SHIFT) & PLL3000_PDIV_MASK;
sdiv = (pll_con >> PLL3000_SDIV_SHIFT) & PLL3000_SDIV_MASK;
fvco *= (2 * (mdiv + 8));
do_div(fvco, pdiv << sdiv);
return (unsigned long)fvco;
}
static const struct clk_ops samsung_pll3000_clk_ops = {
.recalc_rate = samsung_pll3000_recalc_rate,
};
/*
* PLL35xx Clock Type
*/
@ -753,6 +819,12 @@ static void __init _samsung_clk_register_pll(struct samsung_pll_clock *pll_clk,
}
switch (pll_clk->type) {
case pll_2126:
init.ops = &samsung_pll2126_clk_ops;
break;
case pll_3000:
init.ops = &samsung_pll3000_clk_ops;
break;
/* clk_ops for 35xx and 2550 are similar */
case pll_35xx:
case pll_2550:

2
drivers/clk/samsung/clk-pll.h
View File

@ -13,6 +13,8 @@
#define __SAMSUNG_CLK_PLL_H
enum samsung_pll_type {
pll_2126,
pll_3000,
pll_35xx,
pll_36xx,
pll_2550,