2 * Copyright (C) 2016 Socionext Inc.
3 * Author: Masahiro Yamada <yamada.masahiro@socionext.com>
5 * SPDX-License-Identifier: GPL-2.0+
9 #include <linux/bitops.h>
11 #include <linux/sizes.h>
16 #define SC_PLLCTRL_SSC_DK_MASK GENMASK(14, 0)
17 #define SC_PLLCTRL_SSC_EN BIT(31)
18 #define SC_PLLCTRL2_NRSTDS BIT(28)
19 #define SC_PLLCTRL2_SSC_JK_MASK GENMASK(26, 0)
21 /* PLL type: VPLL27 */
22 #define SC_VPLL27CTRL_WP BIT(0)
23 #define SC_VPLL27CTRL3_K_LD BIT(28)
26 #define SC_DSPLLCTRL2_K_LD BIT(28)
28 int uniphier_ld20_sscpll_init(unsigned long reg_base
, unsigned int freq
,
29 unsigned int ssc_rate
, unsigned int divn
)
34 base
= ioremap(reg_base
, SZ_16
);
38 if (freq
!= UNIPHIER_PLL_FREQ_DEFAULT
) {
39 tmp
= readl(base
); /* SSCPLLCTRL */
40 tmp
&= ~SC_PLLCTRL_SSC_DK_MASK
;
41 tmp
|= (487 * freq
* ssc_rate
/ divn
/ 512) &
42 SC_PLLCTRL_SSC_DK_MASK
;
45 tmp
= readl(base
+ 4);
46 tmp
&= ~SC_PLLCTRL2_SSC_JK_MASK
;
47 tmp
|= (41859 * freq
/ divn
) & SC_PLLCTRL2_SSC_JK_MASK
;
52 tmp
= readl(base
+ 4); /* SSCPLLCTRL2 */
53 tmp
|= SC_PLLCTRL2_NRSTDS
;
54 writel(tmp
, base
+ 4);
61 int uniphier_ld20_sscpll_ssc_en(unsigned long reg_base
)
66 base
= ioremap(reg_base
, SZ_16
);
70 tmp
= readl(base
); /* SSCPLLCTRL */
71 tmp
|= SC_PLLCTRL_SSC_EN
;
79 int uniphier_ld20_vpll27_init(unsigned long reg_base
)
84 base
= ioremap(reg_base
, SZ_16
);
88 tmp
= readl(base
); /* VPLL27CTRL */
89 tmp
|= SC_VPLL27CTRL_WP
; /* write protect off */
92 tmp
= readl(base
+ 8); /* VPLL27CTRL3 */
93 tmp
|= SC_VPLL27CTRL3_K_LD
;
94 writel(tmp
, base
+ 8);
96 tmp
= readl(base
); /* VPLL27CTRL */
97 tmp
&= ~SC_VPLL27CTRL_WP
; /* write protect on */
105 int uniphier_ld20_dspll_init(unsigned long reg_base
)
110 base
= ioremap(reg_base
, SZ_16
);
114 tmp
= readl(base
+ 8); /* DSPLLCTRL2 */
115 tmp
|= SC_DSPLLCTRL2_K_LD
;
116 writel(tmp
, base
+ 8);