| /* |
| * Copyright (C) 2014 STMicroelectronics R&D Ltd |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| */ |
| |
| /* |
| * Authors: |
| * Stephen Gallimore <stephen.gallimore@st.com>, |
| * Pankaj Dev <pankaj.dev@st.com>. |
| */ |
| |
| #include <linux/slab.h> |
| #include <linux/of_address.h> |
| #include <linux/clk.h> |
| #include <linux/clk-provider.h> |
| |
| #include "clkgen.h" |
| |
| /* |
| * Maximum input clock to the PLL before we divide it down by 2 |
| * although in reality in actual systems this has never been seen to |
| * be used. |
| */ |
| #define QUADFS_NDIV_THRESHOLD 30000000 |
| |
| #define PLL_BW_GOODREF (0L) |
| #define PLL_BW_VBADREF (1L) |
| #define PLL_BW_BADREF (2L) |
| #define PLL_BW_VGOODREF (3L) |
| |
| #define QUADFS_MAX_CHAN 4 |
| |
| struct stm_fs { |
| unsigned long ndiv; |
| unsigned long mdiv; |
| unsigned long pe; |
| unsigned long sdiv; |
| unsigned long nsdiv; |
| }; |
| |
| static const struct stm_fs fs216c65_rtbl[] = { |
| { .mdiv = 0x1f, .pe = 0x0, .sdiv = 0x7, .nsdiv = 0 }, /* 312.5 Khz */ |
| { .mdiv = 0x17, .pe = 0x25ed, .sdiv = 0x1, .nsdiv = 0 }, /* 27 MHz */ |
| { .mdiv = 0x1a, .pe = 0x7b36, .sdiv = 0x2, .nsdiv = 1 }, /* 36.87 MHz */ |
| { .mdiv = 0x13, .pe = 0x0, .sdiv = 0x2, .nsdiv = 1 }, /* 48 MHz */ |
| { .mdiv = 0x11, .pe = 0x1c72, .sdiv = 0x1, .nsdiv = 1 }, /* 108 MHz */ |
| }; |
| |
| static const struct stm_fs fs432c65_rtbl[] = { |
| { .mdiv = 0x1f, .pe = 0x0, .sdiv = 0x7, .nsdiv = 0 }, /* 625 Khz */ |
| { .mdiv = 0x13, .pe = 0x777c, .sdiv = 0x4, .nsdiv = 1 }, /* 25.175 MHz */ |
| { .mdiv = 0x19, .pe = 0x4d35, .sdiv = 0x2, .nsdiv = 0 }, /* 25.200 MHz */ |
| { .mdiv = 0x11, .pe = 0x1c72, .sdiv = 0x4, .nsdiv = 1 }, /* 27.000 MHz */ |
| { .mdiv = 0x17, .pe = 0x28f5, .sdiv = 0x2, .nsdiv = 0 }, /* 27.027 MHz */ |
| { .mdiv = 0x16, .pe = 0x3359, .sdiv = 0x2, .nsdiv = 0 }, /* 28.320 MHz */ |
| { .mdiv = 0x1f, .pe = 0x2083, .sdiv = 0x3, .nsdiv = 1 }, /* 30.240 MHz */ |
| { .mdiv = 0x1e, .pe = 0x430d, .sdiv = 0x3, .nsdiv = 1 }, /* 31.500 MHz */ |
| { .mdiv = 0x17, .pe = 0x0, .sdiv = 0x3, .nsdiv = 1 }, /* 40.000 MHz */ |
| { .mdiv = 0x19, .pe = 0x121a, .sdiv = 0x1, .nsdiv = 0 }, /* 49.500 MHz */ |
| { .mdiv = 0x13, .pe = 0x6667, .sdiv = 0x3, .nsdiv = 1 }, /* 50.000 MHz */ |
| { .mdiv = 0x10, .pe = 0x1ee6, .sdiv = 0x3, .nsdiv = 1 }, /* 57.284 MHz */ |
| { .mdiv = 0x1d, .pe = 0x3b14, .sdiv = 0x2, .nsdiv = 1 }, /* 65.000 MHz */ |
| { .mdiv = 0x12, .pe = 0x7c65, .sdiv = 0x1, .nsdiv = 0 }, /* 71.000 MHz */ |
| { .mdiv = 0x19, .pe = 0xecd, .sdiv = 0x2, .nsdiv = 1 }, /* 74.176 MHz */ |
| { .mdiv = 0x19, .pe = 0x121a, .sdiv = 0x2, .nsdiv = 1 }, /* 74.250 MHz */ |
| { .mdiv = 0x19, .pe = 0x3334, .sdiv = 0x2, .nsdiv = 1 }, /* 75.000 MHz */ |
| { .mdiv = 0x18, .pe = 0x5138, .sdiv = 0x2, .nsdiv = 1 }, /* 78.800 MHz */ |
| { .mdiv = 0x1d, .pe = 0x77d, .sdiv = 0x0, .nsdiv = 0 }, /* 85.500 MHz */ |
| { .mdiv = 0x1c, .pe = 0x13d5, .sdiv = 0x0, .nsdiv = 0 }, /* 88.750 MHz */ |
| { .mdiv = 0x11, .pe = 0x1c72, .sdiv = 0x2, .nsdiv = 1 }, /* 108.000 MHz */ |
| { .mdiv = 0x17, .pe = 0x28f5, .sdiv = 0x0, .nsdiv = 0 }, /* 108.108 MHz */ |
| { .mdiv = 0x10, .pe = 0x6e26, .sdiv = 0x2, .nsdiv = 1 }, /* 118.963 MHz */ |
| { .mdiv = 0x15, .pe = 0x3e63, .sdiv = 0x0, .nsdiv = 0 }, /* 119.000 MHz */ |
| { .mdiv = 0x1c, .pe = 0x471d, .sdiv = 0x1, .nsdiv = 1 }, /* 135.000 MHz */ |
| { .mdiv = 0x19, .pe = 0xecd, .sdiv = 0x1, .nsdiv = 1 }, /* 148.352 MHz */ |
| { .mdiv = 0x19, .pe = 0x121a, .sdiv = 0x1, .nsdiv = 1 }, /* 148.500 MHz */ |
| { .mdiv = 0x19, .pe = 0x121a, .sdiv = 0x0, .nsdiv = 1 }, /* 297 MHz */ |
| }; |
| |
| static const struct stm_fs fs660c32_rtbl[] = { |
| { .mdiv = 0x14, .pe = 0x376b, .sdiv = 0x4, .nsdiv = 1 }, /* 25.175 MHz */ |
| { .mdiv = 0x14, .pe = 0x30c3, .sdiv = 0x4, .nsdiv = 1 }, /* 25.200 MHz */ |
| { .mdiv = 0x10, .pe = 0x71c7, .sdiv = 0x4, .nsdiv = 1 }, /* 27.000 MHz */ |
| { .mdiv = 0x00, .pe = 0x47af, .sdiv = 0x3, .nsdiv = 0 }, /* 27.027 MHz */ |
| { .mdiv = 0x0e, .pe = 0x4e1a, .sdiv = 0x4, .nsdiv = 1 }, /* 28.320 MHz */ |
| { .mdiv = 0x0b, .pe = 0x534d, .sdiv = 0x4, .nsdiv = 1 }, /* 30.240 MHz */ |
| { .mdiv = 0x17, .pe = 0x6fbf, .sdiv = 0x2, .nsdiv = 0 }, /* 31.500 MHz */ |
| { .mdiv = 0x01, .pe = 0x0, .sdiv = 0x4, .nsdiv = 1 }, /* 40.000 MHz */ |
| { .mdiv = 0x15, .pe = 0x2aab, .sdiv = 0x3, .nsdiv = 1 }, /* 49.500 MHz */ |
| { .mdiv = 0x14, .pe = 0x6666, .sdiv = 0x3, .nsdiv = 1 }, /* 50.000 MHz */ |
| { .mdiv = 0x1d, .pe = 0x395f, .sdiv = 0x1, .nsdiv = 0 }, /* 57.284 MHz */ |
| { .mdiv = 0x08, .pe = 0x4ec5, .sdiv = 0x3, .nsdiv = 1 }, /* 65.000 MHz */ |
| { .mdiv = 0x05, .pe = 0x1770, .sdiv = 0x3, .nsdiv = 1 }, /* 71.000 MHz */ |
| { .mdiv = 0x03, .pe = 0x4ba7, .sdiv = 0x3, .nsdiv = 1 }, /* 74.176 MHz */ |
| { .mdiv = 0x0f, .pe = 0x3426, .sdiv = 0x1, .nsdiv = 0 }, /* 74.250 MHz */ |
| { .mdiv = 0x0e, .pe = 0x7777, .sdiv = 0x1, .nsdiv = 0 }, /* 75.000 MHz */ |
| { .mdiv = 0x01, .pe = 0x4053, .sdiv = 0x3, .nsdiv = 1 }, /* 78.800 MHz */ |
| { .mdiv = 0x09, .pe = 0x15b5, .sdiv = 0x1, .nsdiv = 0 }, /* 85.500 MHz */ |
| { .mdiv = 0x1b, .pe = 0x3f19, .sdiv = 0x2, .nsdiv = 1 }, /* 88.750 MHz */ |
| { .mdiv = 0x10, .pe = 0x71c7, .sdiv = 0x2, .nsdiv = 1 }, /* 108.000 MHz */ |
| { .mdiv = 0x00, .pe = 0x47af, .sdiv = 0x1, .nsdiv = 0 }, /* 108.108 MHz */ |
| { .mdiv = 0x0c, .pe = 0x3118, .sdiv = 0x2, .nsdiv = 1 }, /* 118.963 MHz */ |
| { .mdiv = 0x0c, .pe = 0x2f54, .sdiv = 0x2, .nsdiv = 1 }, /* 119.000 MHz */ |
| { .mdiv = 0x07, .pe = 0xe39, .sdiv = 0x2, .nsdiv = 1 }, /* 135.000 MHz */ |
| { .mdiv = 0x03, .pe = 0x4ba7, .sdiv = 0x2, .nsdiv = 1 }, /* 148.352 MHz */ |
| { .mdiv = 0x0f, .pe = 0x3426, .sdiv = 0x0, .nsdiv = 0 }, /* 148.500 MHz */ |
| { .mdiv = 0x03, .pe = 0x4ba7, .sdiv = 0x1, .nsdiv = 1 }, /* 296.704 MHz */ |
| { .mdiv = 0x03, .pe = 0x471c, .sdiv = 0x1, .nsdiv = 1 }, /* 297.000 MHz */ |
| { .mdiv = 0x00, .pe = 0x295f, .sdiv = 0x1, .nsdiv = 1 }, /* 326.700 MHz */ |
| { .mdiv = 0x1f, .pe = 0x3633, .sdiv = 0x0, .nsdiv = 1 }, /* 333.000 MHz */ |
| { .mdiv = 0x1c, .pe = 0x0, .sdiv = 0x0, .nsdiv = 1 }, /* 352.000 Mhz */ |
| }; |
| |
| struct clkgen_quadfs_data { |
| bool reset_present; |
| bool bwfilter_present; |
| bool lockstatus_present; |
| bool powerup_polarity; |
| bool standby_polarity; |
| bool nsdiv_present; |
| bool nrst_present; |
| struct clkgen_field ndiv; |
| struct clkgen_field ref_bw; |
| struct clkgen_field nreset; |
| struct clkgen_field npda; |
| struct clkgen_field lock_status; |
| |
| struct clkgen_field nrst[QUADFS_MAX_CHAN]; |
| struct clkgen_field nsb[QUADFS_MAX_CHAN]; |
| struct clkgen_field en[QUADFS_MAX_CHAN]; |
| struct clkgen_field mdiv[QUADFS_MAX_CHAN]; |
| struct clkgen_field pe[QUADFS_MAX_CHAN]; |
| struct clkgen_field sdiv[QUADFS_MAX_CHAN]; |
| struct clkgen_field nsdiv[QUADFS_MAX_CHAN]; |
| |
| const struct clk_ops *pll_ops; |
| const struct stm_fs *rtbl; |
| u8 rtbl_cnt; |
| int (*get_rate)(unsigned long , const struct stm_fs *, |
| unsigned long *); |
| }; |
| |
| static const struct clk_ops st_quadfs_pll_c65_ops; |
| static const struct clk_ops st_quadfs_pll_c32_ops; |
| static const struct clk_ops st_quadfs_fs216c65_ops; |
| static const struct clk_ops st_quadfs_fs432c65_ops; |
| static const struct clk_ops st_quadfs_fs660c32_ops; |
| |
| static int clk_fs216c65_get_rate(unsigned long, const struct stm_fs *, |
| unsigned long *); |
| static int clk_fs432c65_get_rate(unsigned long, const struct stm_fs *, |
| unsigned long *); |
| static int clk_fs660c32_dig_get_rate(unsigned long, const struct stm_fs *, |
| unsigned long *); |
| /* |
| * Values for all of the standalone instances of this clock |
| * generator found in STiH415 and STiH416 SYSCFG register banks. Note |
| * that the individual channel standby control bits (nsb) are in the |
| * first register along with the PLL control bits. |
| */ |
| static const struct clkgen_quadfs_data st_fs216c65_416 = { |
| /* 416 specific */ |
| .npda = CLKGEN_FIELD(0x0, 0x1, 14), |
| .nsb = { CLKGEN_FIELD(0x0, 0x1, 10), |
| CLKGEN_FIELD(0x0, 0x1, 11), |
| CLKGEN_FIELD(0x0, 0x1, 12), |
| CLKGEN_FIELD(0x0, 0x1, 13) }, |
| .nsdiv_present = true, |
| .nsdiv = { CLKGEN_FIELD(0x0, 0x1, 18), |
| CLKGEN_FIELD(0x0, 0x1, 19), |
| CLKGEN_FIELD(0x0, 0x1, 20), |
| CLKGEN_FIELD(0x0, 0x1, 21) }, |
| .mdiv = { CLKGEN_FIELD(0x4, 0x1f, 0), |
| CLKGEN_FIELD(0x14, 0x1f, 0), |
| CLKGEN_FIELD(0x24, 0x1f, 0), |
| CLKGEN_FIELD(0x34, 0x1f, 0) }, |
| .en = { CLKGEN_FIELD(0x10, 0x1, 0), |
| CLKGEN_FIELD(0x20, 0x1, 0), |
| CLKGEN_FIELD(0x30, 0x1, 0), |
| CLKGEN_FIELD(0x40, 0x1, 0) }, |
| .ndiv = CLKGEN_FIELD(0x0, 0x1, 15), |
| .bwfilter_present = true, |
| .ref_bw = CLKGEN_FIELD(0x0, 0x3, 16), |
| .pe = { CLKGEN_FIELD(0x8, 0xffff, 0), |
| CLKGEN_FIELD(0x18, 0xffff, 0), |
| CLKGEN_FIELD(0x28, 0xffff, 0), |
| CLKGEN_FIELD(0x38, 0xffff, 0) }, |
| .sdiv = { CLKGEN_FIELD(0xC, 0x7, 0), |
| CLKGEN_FIELD(0x1C, 0x7, 0), |
| CLKGEN_FIELD(0x2C, 0x7, 0), |
| CLKGEN_FIELD(0x3C, 0x7, 0) }, |
| .pll_ops = &st_quadfs_pll_c65_ops, |
| .rtbl = fs216c65_rtbl, |
| .rtbl_cnt = ARRAY_SIZE(fs216c65_rtbl), |
| .get_rate = clk_fs216c65_get_rate, |
| }; |
| |
| static const struct clkgen_quadfs_data st_fs432c65_416 = { |
| .npda = CLKGEN_FIELD(0x0, 0x1, 14), |
| .nsb = { CLKGEN_FIELD(0x0, 0x1, 10), |
| CLKGEN_FIELD(0x0, 0x1, 11), |
| CLKGEN_FIELD(0x0, 0x1, 12), |
| CLKGEN_FIELD(0x0, 0x1, 13) }, |
| .nsdiv_present = true, |
| .nsdiv = { CLKGEN_FIELD(0x0, 0x1, 18), |
| CLKGEN_FIELD(0x0, 0x1, 19), |
| CLKGEN_FIELD(0x0, 0x1, 20), |
| CLKGEN_FIELD(0x0, 0x1, 21) }, |
| .mdiv = { CLKGEN_FIELD(0x4, 0x1f, 0), |
| CLKGEN_FIELD(0x14, 0x1f, 0), |
| CLKGEN_FIELD(0x24, 0x1f, 0), |
| CLKGEN_FIELD(0x34, 0x1f, 0) }, |
| .en = { CLKGEN_FIELD(0x10, 0x1, 0), |
| CLKGEN_FIELD(0x20, 0x1, 0), |
| CLKGEN_FIELD(0x30, 0x1, 0), |
| CLKGEN_FIELD(0x40, 0x1, 0) }, |
| .ndiv = CLKGEN_FIELD(0x0, 0x1, 15), |
| .bwfilter_present = true, |
| .ref_bw = CLKGEN_FIELD(0x0, 0x3, 16), |
| .pe = { CLKGEN_FIELD(0x8, 0xffff, 0), |
| CLKGEN_FIELD(0x18, 0xffff, 0), |
| CLKGEN_FIELD(0x28, 0xffff, 0), |
| CLKGEN_FIELD(0x38, 0xffff, 0) }, |
| .sdiv = { CLKGEN_FIELD(0xC, 0x7, 0), |
| CLKGEN_FIELD(0x1C, 0x7, 0), |
| CLKGEN_FIELD(0x2C, 0x7, 0), |
| CLKGEN_FIELD(0x3C, 0x7, 0) }, |
| .pll_ops = &st_quadfs_pll_c65_ops, |
| .rtbl = fs432c65_rtbl, |
| .rtbl_cnt = ARRAY_SIZE(fs432c65_rtbl), |
| .get_rate = clk_fs432c65_get_rate, |
| }; |
| |
| static const struct clkgen_quadfs_data st_fs660c32_E_416 = { |
| .npda = CLKGEN_FIELD(0x0, 0x1, 14), |
| .nsb = { CLKGEN_FIELD(0x0, 0x1, 10), |
| CLKGEN_FIELD(0x0, 0x1, 11), |
| CLKGEN_FIELD(0x0, 0x1, 12), |
| CLKGEN_FIELD(0x0, 0x1, 13) }, |
| .nsdiv_present = true, |
| .nsdiv = { CLKGEN_FIELD(0x0, 0x1, 18), |
| CLKGEN_FIELD(0x0, 0x1, 19), |
| CLKGEN_FIELD(0x0, 0x1, 20), |
| CLKGEN_FIELD(0x0, 0x1, 21) }, |
| .mdiv = { CLKGEN_FIELD(0x4, 0x1f, 0), |
| CLKGEN_FIELD(0x14, 0x1f, 0), |
| CLKGEN_FIELD(0x24, 0x1f, 0), |
| CLKGEN_FIELD(0x34, 0x1f, 0) }, |
| .en = { CLKGEN_FIELD(0x10, 0x1, 0), |
| CLKGEN_FIELD(0x20, 0x1, 0), |
| CLKGEN_FIELD(0x30, 0x1, 0), |
| CLKGEN_FIELD(0x40, 0x1, 0) }, |
| .ndiv = CLKGEN_FIELD(0x0, 0x7, 15), |
| .pe = { CLKGEN_FIELD(0x8, 0x7fff, 0), |
| CLKGEN_FIELD(0x18, 0x7fff, 0), |
| CLKGEN_FIELD(0x28, 0x7fff, 0), |
| CLKGEN_FIELD(0x38, 0x7fff, 0) }, |
| .sdiv = { CLKGEN_FIELD(0xC, 0xf, 0), |
| CLKGEN_FIELD(0x1C, 0xf, 0), |
| CLKGEN_FIELD(0x2C, 0xf, 0), |
| CLKGEN_FIELD(0x3C, 0xf, 0) }, |
| .lockstatus_present = true, |
| .lock_status = CLKGEN_FIELD(0xAC, 0x1, 0), |
| .pll_ops = &st_quadfs_pll_c32_ops, |
| .rtbl = fs660c32_rtbl, |
| .rtbl_cnt = ARRAY_SIZE(fs660c32_rtbl), |
| .get_rate = clk_fs660c32_dig_get_rate, |
| }; |
| |
| static const struct clkgen_quadfs_data st_fs660c32_F_416 = { |
| .npda = CLKGEN_FIELD(0x0, 0x1, 14), |
| .nsb = { CLKGEN_FIELD(0x0, 0x1, 10), |
| CLKGEN_FIELD(0x0, 0x1, 11), |
| CLKGEN_FIELD(0x0, 0x1, 12), |
| CLKGEN_FIELD(0x0, 0x1, 13) }, |
| .nsdiv_present = true, |
| .nsdiv = { CLKGEN_FIELD(0x0, 0x1, 18), |
| CLKGEN_FIELD(0x0, 0x1, 19), |
| CLKGEN_FIELD(0x0, 0x1, 20), |
| CLKGEN_FIELD(0x0, 0x1, 21) }, |
| .mdiv = { CLKGEN_FIELD(0x4, 0x1f, 0), |
| CLKGEN_FIELD(0x14, 0x1f, 0), |
| CLKGEN_FIELD(0x24, 0x1f, 0), |
| CLKGEN_FIELD(0x34, 0x1f, 0) }, |
| .en = { CLKGEN_FIELD(0x10, 0x1, 0), |
| CLKGEN_FIELD(0x20, 0x1, 0), |
| CLKGEN_FIELD(0x30, 0x1, 0), |
| CLKGEN_FIELD(0x40, 0x1, 0) }, |
| .ndiv = CLKGEN_FIELD(0x0, 0x7, 15), |
| .pe = { CLKGEN_FIELD(0x8, 0x7fff, 0), |
| CLKGEN_FIELD(0x18, 0x7fff, 0), |
| CLKGEN_FIELD(0x28, 0x7fff, 0), |
| CLKGEN_FIELD(0x38, 0x7fff, 0) }, |
| .sdiv = { CLKGEN_FIELD(0xC, 0xf, 0), |
| CLKGEN_FIELD(0x1C, 0xf, 0), |
| CLKGEN_FIELD(0x2C, 0xf, 0), |
| CLKGEN_FIELD(0x3C, 0xf, 0) }, |
| .lockstatus_present = true, |
| .lock_status = CLKGEN_FIELD(0xEC, 0x1, 0), |
| .pll_ops = &st_quadfs_pll_c32_ops, |
| .rtbl = fs660c32_rtbl, |
| .rtbl_cnt = ARRAY_SIZE(fs660c32_rtbl), |
| .get_rate = clk_fs660c32_dig_get_rate, |
| }; |
| |
| static const struct clkgen_quadfs_data st_fs660c32_C = { |
| .nrst_present = true, |
| .nrst = { CLKGEN_FIELD(0x2f0, 0x1, 0), |
| CLKGEN_FIELD(0x2f0, 0x1, 1), |
| CLKGEN_FIELD(0x2f0, 0x1, 2), |
| CLKGEN_FIELD(0x2f0, 0x1, 3) }, |
| .npda = CLKGEN_FIELD(0x2f0, 0x1, 12), |
| .nsb = { CLKGEN_FIELD(0x2f0, 0x1, 8), |
| CLKGEN_FIELD(0x2f0, 0x1, 9), |
| CLKGEN_FIELD(0x2f0, 0x1, 10), |
| CLKGEN_FIELD(0x2f0, 0x1, 11) }, |
| .nsdiv_present = true, |
| .nsdiv = { CLKGEN_FIELD(0x304, 0x1, 24), |
| CLKGEN_FIELD(0x308, 0x1, 24), |
| CLKGEN_FIELD(0x30c, 0x1, 24), |
| CLKGEN_FIELD(0x310, 0x1, 24) }, |
| .mdiv = { CLKGEN_FIELD(0x304, 0x1f, 15), |
| CLKGEN_FIELD(0x308, 0x1f, 15), |
| CLKGEN_FIELD(0x30c, 0x1f, 15), |
| CLKGEN_FIELD(0x310, 0x1f, 15) }, |
| .en = { CLKGEN_FIELD(0x2fc, 0x1, 0), |
| CLKGEN_FIELD(0x2fc, 0x1, 1), |
| CLKGEN_FIELD(0x2fc, 0x1, 2), |
| CLKGEN_FIELD(0x2fc, 0x1, 3) }, |
| .ndiv = CLKGEN_FIELD(0x2f4, 0x7, 16), |
| .pe = { CLKGEN_FIELD(0x304, 0x7fff, 0), |
| CLKGEN_FIELD(0x308, 0x7fff, 0), |
| CLKGEN_FIELD(0x30c, 0x7fff, 0), |
| CLKGEN_FIELD(0x310, 0x7fff, 0) }, |
| .sdiv = { CLKGEN_FIELD(0x304, 0xf, 20), |
| CLKGEN_FIELD(0x308, 0xf, 20), |
| CLKGEN_FIELD(0x30c, 0xf, 20), |
| CLKGEN_FIELD(0x310, 0xf, 20) }, |
| .lockstatus_present = true, |
| .lock_status = CLKGEN_FIELD(0x2f0, 0x1, 24), |
| .powerup_polarity = 1, |
| .standby_polarity = 1, |
| .pll_ops = &st_quadfs_pll_c32_ops, |
| .rtbl = fs660c32_rtbl, |
| .rtbl_cnt = ARRAY_SIZE(fs660c32_rtbl), |
| .get_rate = clk_fs660c32_dig_get_rate, |
| }; |
| |
| static const struct clkgen_quadfs_data st_fs660c32_D = { |
| .nrst_present = true, |
| .nrst = { CLKGEN_FIELD(0x2a0, 0x1, 0), |
| CLKGEN_FIELD(0x2a0, 0x1, 1), |
| CLKGEN_FIELD(0x2a0, 0x1, 2), |
| CLKGEN_FIELD(0x2a0, 0x1, 3) }, |
| .ndiv = CLKGEN_FIELD(0x2a4, 0x7, 16), |
| .pe = { CLKGEN_FIELD(0x2b4, 0x7fff, 0), |
| CLKGEN_FIELD(0x2b8, 0x7fff, 0), |
| CLKGEN_FIELD(0x2bc, 0x7fff, 0), |
| CLKGEN_FIELD(0x2c0, 0x7fff, 0) }, |
| .sdiv = { CLKGEN_FIELD(0x2b4, 0xf, 20), |
| CLKGEN_FIELD(0x2b8, 0xf, 20), |
| CLKGEN_FIELD(0x2bc, 0xf, 20), |
| CLKGEN_FIELD(0x2c0, 0xf, 20) }, |
| .npda = CLKGEN_FIELD(0x2a0, 0x1, 12), |
| .nsb = { CLKGEN_FIELD(0x2a0, 0x1, 8), |
| CLKGEN_FIELD(0x2a0, 0x1, 9), |
| CLKGEN_FIELD(0x2a0, 0x1, 10), |
| CLKGEN_FIELD(0x2a0, 0x1, 11) }, |
| .nsdiv_present = true, |
| .nsdiv = { CLKGEN_FIELD(0x2b4, 0x1, 24), |
| CLKGEN_FIELD(0x2b8, 0x1, 24), |
| CLKGEN_FIELD(0x2bc, 0x1, 24), |
| CLKGEN_FIELD(0x2c0, 0x1, 24) }, |
| .mdiv = { CLKGEN_FIELD(0x2b4, 0x1f, 15), |
| CLKGEN_FIELD(0x2b8, 0x1f, 15), |
| CLKGEN_FIELD(0x2bc, 0x1f, 15), |
| CLKGEN_FIELD(0x2c0, 0x1f, 15) }, |
| .en = { CLKGEN_FIELD(0x2ac, 0x1, 0), |
| CLKGEN_FIELD(0x2ac, 0x1, 1), |
| CLKGEN_FIELD(0x2ac, 0x1, 2), |
| CLKGEN_FIELD(0x2ac, 0x1, 3) }, |
| .lockstatus_present = true, |
| .lock_status = CLKGEN_FIELD(0x2A0, 0x1, 24), |
| .powerup_polarity = 1, |
| .standby_polarity = 1, |
| .pll_ops = &st_quadfs_pll_c32_ops, |
| .rtbl = fs660c32_rtbl, |
| .rtbl_cnt = ARRAY_SIZE(fs660c32_rtbl), |
| .get_rate = clk_fs660c32_dig_get_rate,}; |
| |
| /** |
| * DOC: A Frequency Synthesizer that multiples its input clock by a fixed factor |
| * |
| * Traits of this clock: |
| * prepare - clk_(un)prepare only ensures parent is (un)prepared |
| * enable - clk_enable and clk_disable are functional & control the Fsyn |
| * rate - inherits rate from parent. set_rate/round_rate/recalc_rate |
| * parent - fixed parent. No clk_set_parent support |
| */ |
| |
| /** |
| * struct st_clk_quadfs_pll - A pll which outputs a fixed multiplier of |
| * its parent clock, found inside a type of |
| * ST quad channel frequency synthesizer block |
| * |
| * @hw: handle between common and hardware-specific interfaces. |
| * @ndiv: regmap field for the ndiv control. |
| * @regs_base: base address of the configuration registers. |
| * @lock: spinlock. |
| * |
| */ |
| struct st_clk_quadfs_pll { |
| struct clk_hw hw; |
| void __iomem *regs_base; |
| spinlock_t *lock; |
| struct clkgen_quadfs_data *data; |
| u32 ndiv; |
| }; |
| |
| #define to_quadfs_pll(_hw) container_of(_hw, struct st_clk_quadfs_pll, hw) |
| |
| static int quadfs_pll_enable(struct clk_hw *hw) |
| { |
| struct st_clk_quadfs_pll *pll = to_quadfs_pll(hw); |
| unsigned long flags = 0, timeout = jiffies + msecs_to_jiffies(10); |
| |
| if (pll->lock) |
| spin_lock_irqsave(pll->lock, flags); |
| |
| /* |
| * Bring block out of reset if we have reset control. |
| */ |
| if (pll->data->reset_present) |
| CLKGEN_WRITE(pll, nreset, 1); |
| |
| /* |
| * Use a fixed input clock noise bandwidth filter for the moment |
| */ |
| if (pll->data->bwfilter_present) |
| CLKGEN_WRITE(pll, ref_bw, PLL_BW_GOODREF); |
| |
| |
| CLKGEN_WRITE(pll, ndiv, pll->ndiv); |
| |
| /* |
| * Power up the PLL |
| */ |
| CLKGEN_WRITE(pll, npda, !pll->data->powerup_polarity); |
| |
| if (pll->lock) |
| spin_unlock_irqrestore(pll->lock, flags); |
| |
| if (pll->data->lockstatus_present) |
| while (!CLKGEN_READ(pll, lock_status)) { |
| if (time_after(jiffies, timeout)) |
| return -ETIMEDOUT; |
| cpu_relax(); |
| } |
| |
| return 0; |
| } |
| |
| static void quadfs_pll_disable(struct clk_hw *hw) |
| { |
| struct st_clk_quadfs_pll *pll = to_quadfs_pll(hw); |
| unsigned long flags = 0; |
| |
| if (pll->lock) |
| spin_lock_irqsave(pll->lock, flags); |
| |
| /* |
| * Powerdown the PLL and then put block into soft reset if we have |
| * reset control. |
| */ |
| CLKGEN_WRITE(pll, npda, pll->data->powerup_polarity); |
| |
| if (pll->data->reset_present) |
| CLKGEN_WRITE(pll, nreset, 0); |
| |
| if (pll->lock) |
| spin_unlock_irqrestore(pll->lock, flags); |
| } |
| |
| static int quadfs_pll_is_enabled(struct clk_hw *hw) |
| { |
| struct st_clk_quadfs_pll *pll = to_quadfs_pll(hw); |
| u32 npda = CLKGEN_READ(pll, npda); |
| |
| return pll->data->powerup_polarity ? !npda : !!npda; |
| } |
| |
| static int clk_fs660c32_vco_get_rate(unsigned long input, struct stm_fs *fs, |
| unsigned long *rate) |
| { |
| unsigned long nd = fs->ndiv + 16; /* ndiv value */ |
| |
| *rate = input * nd; |
| |
| return 0; |
| } |
| |
| static unsigned long quadfs_pll_fs660c32_recalc_rate(struct clk_hw *hw, |
| unsigned long parent_rate) |
| { |
| struct st_clk_quadfs_pll *pll = to_quadfs_pll(hw); |
| unsigned long rate = 0; |
| struct stm_fs params; |
| |
| params.ndiv = CLKGEN_READ(pll, ndiv); |
| if (clk_fs660c32_vco_get_rate(parent_rate, ¶ms, &rate)) |
| pr_err("%s:%s error calculating rate\n", |
| clk_hw_get_name(hw), __func__); |
| |
| pll->ndiv = params.ndiv; |
| |
| return rate; |
| } |
| |
| static int clk_fs660c32_vco_get_params(unsigned long input, |
| unsigned long output, struct stm_fs *fs) |
| { |
| /* Formula |
| VCO frequency = (fin x ndiv) / pdiv |
| ndiv = VCOfreq * pdiv / fin |
| */ |
| unsigned long pdiv = 1, n; |
| |
| /* Output clock range: 384Mhz to 660Mhz */ |
| if (output < 384000000 || output > 660000000) |
| return -EINVAL; |
| |
| if (input > 40000000) |
| /* This means that PDIV would be 2 instead of 1. |
| Not supported today. */ |
| return -EINVAL; |
| |
| input /= 1000; |
| output /= 1000; |
| |
| n = output * pdiv / input; |
| if (n < 16) |
| n = 16; |
| fs->ndiv = n - 16; /* Converting formula value to reg value */ |
| |
| return 0; |
| } |
| |
| static long quadfs_pll_fs660c32_round_rate(struct clk_hw *hw, unsigned long rate |
| , unsigned long *prate) |
| { |
| struct stm_fs params; |
| |
| if (!clk_fs660c32_vco_get_params(*prate, rate, ¶ms)) |
| clk_fs660c32_vco_get_rate(*prate, ¶ms, &rate); |
| |
| pr_debug("%s: %s new rate %ld [sdiv=0x%x,md=0x%x,pe=0x%x,nsdiv3=%u]\n", |
| __func__, clk_hw_get_name(hw), |
| rate, (unsigned int)params.sdiv, |
| (unsigned int)params.mdiv, |
| (unsigned int)params.pe, (unsigned int)params.nsdiv); |
| |
| return rate; |
| } |
| |
| static int quadfs_pll_fs660c32_set_rate(struct clk_hw *hw, unsigned long rate, |
| unsigned long parent_rate) |
| { |
| struct st_clk_quadfs_pll *pll = to_quadfs_pll(hw); |
| struct stm_fs params; |
| long hwrate = 0; |
| unsigned long flags = 0; |
| |
| if (!rate || !parent_rate) |
| return -EINVAL; |
| |
| if (!clk_fs660c32_vco_get_params(parent_rate, rate, ¶ms)) |
| clk_fs660c32_vco_get_rate(parent_rate, ¶ms, &hwrate); |
| |
| pr_debug("%s: %s new rate %ld [ndiv=0x%x]\n", |
| __func__, clk_hw_get_name(hw), |
| hwrate, (unsigned int)params.ndiv); |
| |
| if (!hwrate) |
| return -EINVAL; |
| |
| pll->ndiv = params.ndiv; |
| |
| if (pll->lock) |
| spin_lock_irqsave(pll->lock, flags); |
| |
| CLKGEN_WRITE(pll, ndiv, pll->ndiv); |
| |
| if (pll->lock) |
| spin_unlock_irqrestore(pll->lock, flags); |
| |
| return 0; |
| } |
| |
| static const struct clk_ops st_quadfs_pll_c65_ops = { |
| .enable = quadfs_pll_enable, |
| .disable = quadfs_pll_disable, |
| .is_enabled = quadfs_pll_is_enabled, |
| }; |
| |
| static const struct clk_ops st_quadfs_pll_c32_ops = { |
| .enable = quadfs_pll_enable, |
| .disable = quadfs_pll_disable, |
| .is_enabled = quadfs_pll_is_enabled, |
| .recalc_rate = quadfs_pll_fs660c32_recalc_rate, |
| .round_rate = quadfs_pll_fs660c32_round_rate, |
| .set_rate = quadfs_pll_fs660c32_set_rate, |
| }; |
| |
| static struct clk * __init st_clk_register_quadfs_pll( |
| const char *name, const char *parent_name, |
| struct clkgen_quadfs_data *quadfs, void __iomem *reg, |
| spinlock_t *lock) |
| { |
| struct st_clk_quadfs_pll *pll; |
| struct clk *clk; |
| struct clk_init_data init; |
| |
| /* |
| * Sanity check required pointers. |
| */ |
| if (WARN_ON(!name || !parent_name)) |
| return ERR_PTR(-EINVAL); |
| |
| pll = kzalloc(sizeof(*pll), GFP_KERNEL); |
| if (!pll) |
| return ERR_PTR(-ENOMEM); |
| |
| init.name = name; |
| init.ops = quadfs->pll_ops; |
| init.flags = CLK_IS_BASIC | CLK_GET_RATE_NOCACHE; |
| init.parent_names = &parent_name; |
| init.num_parents = 1; |
| |
| pll->data = quadfs; |
| pll->regs_base = reg; |
| pll->lock = lock; |
| pll->hw.init = &init; |
| |
| clk = clk_register(NULL, &pll->hw); |
| |
| if (IS_ERR(clk)) |
| kfree(pll); |
| |
| return clk; |
| } |
| |
| /** |
| * DOC: A digital frequency synthesizer |
| * |
| * Traits of this clock: |
| * prepare - clk_(un)prepare only ensures parent is (un)prepared |
| * enable - clk_enable and clk_disable are functional |
| * rate - set rate is functional |
| * parent - fixed parent. No clk_set_parent support |
| */ |
| |
| /** |
| * struct st_clk_quadfs_fsynth - One clock output from a four channel digital |
| * frequency synthesizer (fsynth) block. |
| * |
| * @hw: handle between common and hardware-specific interfaces |
| * |
| * @nsb: regmap field in the output control register for the digital |
| * standby of this fsynth channel. This control is active low so |
| * the channel is in standby when the control bit is cleared. |
| * |
| * @nsdiv: regmap field in the output control register for |
| * for the optional divide by 3 of this fsynth channel. This control |
| * is active low so the divide by 3 is active when the control bit is |
| * cleared and the divide is bypassed when the bit is set. |
| */ |
| struct st_clk_quadfs_fsynth { |
| struct clk_hw hw; |
| void __iomem *regs_base; |
| spinlock_t *lock; |
| struct clkgen_quadfs_data *data; |
| |
| u32 chan; |
| /* |
| * Cached hardware values from set_rate so we can program the |
| * hardware in enable. There are two reasons for this: |
| * |
| * 1. The registers may not be writable until the parent has been |
| * enabled. |
| * |
| * 2. It restores the clock rate when a driver does an enable |
| * on PM restore, after a suspend to RAM has lost the hardware |
| * setup. |
| */ |
| u32 md; |
| u32 pe; |
| u32 sdiv; |
| u32 nsdiv; |
| }; |
| |
| #define to_quadfs_fsynth(_hw) \ |
| container_of(_hw, struct st_clk_quadfs_fsynth, hw) |
| |
| static void quadfs_fsynth_program_enable(struct st_clk_quadfs_fsynth *fs) |
| { |
| /* |
| * Pulse the program enable register lsb to make the hardware take |
| * notice of the new md/pe values with a glitchless transition. |
| */ |
| CLKGEN_WRITE(fs, en[fs->chan], 1); |
| CLKGEN_WRITE(fs, en[fs->chan], 0); |
| } |
| |
| static void quadfs_fsynth_program_rate(struct st_clk_quadfs_fsynth *fs) |
| { |
| unsigned long flags = 0; |
| |
| /* |
| * Ensure the md/pe parameters are ignored while we are |
| * reprogramming them so we can get a glitchless change |
| * when fine tuning the speed of a running clock. |
| */ |
| CLKGEN_WRITE(fs, en[fs->chan], 0); |
| |
| CLKGEN_WRITE(fs, mdiv[fs->chan], fs->md); |
| CLKGEN_WRITE(fs, pe[fs->chan], fs->pe); |
| CLKGEN_WRITE(fs, sdiv[fs->chan], fs->sdiv); |
| |
| if (fs->lock) |
| spin_lock_irqsave(fs->lock, flags); |
| |
| if (fs->data->nsdiv_present) |
| CLKGEN_WRITE(fs, nsdiv[fs->chan], fs->nsdiv); |
| |
| if (fs->lock) |
| spin_unlock_irqrestore(fs->lock, flags); |
| } |
| |
| static int quadfs_fsynth_enable(struct clk_hw *hw) |
| { |
| struct st_clk_quadfs_fsynth *fs = to_quadfs_fsynth(hw); |
| unsigned long flags = 0; |
| |
| pr_debug("%s: %s\n", __func__, clk_hw_get_name(hw)); |
| |
| quadfs_fsynth_program_rate(fs); |
| |
| if (fs->lock) |
| spin_lock_irqsave(fs->lock, flags); |
| |
| CLKGEN_WRITE(fs, nsb[fs->chan], !fs->data->standby_polarity); |
| |
| if (fs->data->nrst_present) |
| CLKGEN_WRITE(fs, nrst[fs->chan], 0); |
| |
| if (fs->lock) |
| spin_unlock_irqrestore(fs->lock, flags); |
| |
| quadfs_fsynth_program_enable(fs); |
| |
| return 0; |
| } |
| |
| static void quadfs_fsynth_disable(struct clk_hw *hw) |
| { |
| struct st_clk_quadfs_fsynth *fs = to_quadfs_fsynth(hw); |
| unsigned long flags = 0; |
| |
| pr_debug("%s: %s\n", __func__, clk_hw_get_name(hw)); |
| |
| if (fs->lock) |
| spin_lock_irqsave(fs->lock, flags); |
| |
| CLKGEN_WRITE(fs, nsb[fs->chan], fs->data->standby_polarity); |
| |
| if (fs->lock) |
| spin_unlock_irqrestore(fs->lock, flags); |
| } |
| |
| static int quadfs_fsynth_is_enabled(struct clk_hw *hw) |
| { |
| struct st_clk_quadfs_fsynth *fs = to_quadfs_fsynth(hw); |
| u32 nsb = CLKGEN_READ(fs, nsb[fs->chan]); |
| |
| pr_debug("%s: %s enable bit = 0x%x\n", |
| __func__, clk_hw_get_name(hw), nsb); |
| |
| return fs->data->standby_polarity ? !nsb : !!nsb; |
| } |
| |
| #define P15 (uint64_t)(1 << 15) |
| |
| static int clk_fs216c65_get_rate(unsigned long input, const struct stm_fs *fs, |
| unsigned long *rate) |
| { |
| uint64_t res; |
| unsigned long ns; |
| unsigned long nd = 8; /* ndiv stuck at 0 => val = 8 */ |
| unsigned long s; |
| long m; |
| |
| m = fs->mdiv - 32; |
| s = 1 << (fs->sdiv + 1); |
| ns = (fs->nsdiv ? 1 : 3); |
| |
| res = (uint64_t)(s * ns * P15 * (uint64_t)(m + 33)); |
| res = res - (s * ns * fs->pe); |
| *rate = div64_u64(P15 * nd * input * 32, res); |
| |
| return 0; |
| } |
| |
| static int clk_fs432c65_get_rate(unsigned long input, const struct stm_fs *fs, |
| unsigned long *rate) |
| { |
| uint64_t res; |
| unsigned long nd = 16; /* ndiv value; stuck at 0 (30Mhz input) */ |
| long m; |
| unsigned long sd; |
| unsigned long ns; |
| |
| m = fs->mdiv - 32; |
| sd = 1 << (fs->sdiv + 1); |
| ns = (fs->nsdiv ? 1 : 3); |
| |
| res = (uint64_t)(sd * ns * P15 * (uint64_t)(m + 33)); |
| res = res - (sd * ns * fs->pe); |
| *rate = div64_u64(P15 * nd * input * 32, res); |
| |
| return 0; |
| } |
| |
| #define P20 (uint64_t)(1 << 20) |
| |
| static int clk_fs660c32_dig_get_rate(unsigned long input, |
| const struct stm_fs *fs, unsigned long *rate) |
| { |
| unsigned long s = (1 << fs->sdiv); |
| unsigned long ns; |
| uint64_t res; |
| |
| /* |
| * 'nsdiv' is a register value ('BIN') which is translated |
| * to a decimal value according to following rules. |
| * |
| * nsdiv ns.dec |
| * 0 3 |
| * 1 1 |
| */ |
| ns = (fs->nsdiv == 1) ? 1 : 3; |
| |
| res = (P20 * (32 + fs->mdiv) + 32 * fs->pe) * s * ns; |
| *rate = (unsigned long)div64_u64(input * P20 * 32, res); |
| |
| return 0; |
| } |
| |
| static int quadfs_fsynt_get_hw_value_for_recalc(struct st_clk_quadfs_fsynth *fs, |
| struct stm_fs *params) |
| { |
| /* |
| * Get the initial hardware values for recalc_rate |
| */ |
| params->mdiv = CLKGEN_READ(fs, mdiv[fs->chan]); |
| params->pe = CLKGEN_READ(fs, pe[fs->chan]); |
| params->sdiv = CLKGEN_READ(fs, sdiv[fs->chan]); |
| |
| if (fs->data->nsdiv_present) |
| params->nsdiv = CLKGEN_READ(fs, nsdiv[fs->chan]); |
| else |
| params->nsdiv = 1; |
| |
| /* |
| * If All are NULL then assume no clock rate is programmed. |
| */ |
| if (!params->mdiv && !params->pe && !params->sdiv) |
| return 1; |
| |
| fs->md = params->mdiv; |
| fs->pe = params->pe; |
| fs->sdiv = params->sdiv; |
| fs->nsdiv = params->nsdiv; |
| |
| return 0; |
| } |
| |
| static long quadfs_find_best_rate(struct clk_hw *hw, unsigned long drate, |
| unsigned long prate, struct stm_fs *params) |
| { |
| struct st_clk_quadfs_fsynth *fs = to_quadfs_fsynth(hw); |
| int (*clk_fs_get_rate)(unsigned long , |
| const struct stm_fs *, unsigned long *); |
| struct stm_fs prev_params; |
| unsigned long prev_rate, rate = 0; |
| unsigned long diff_rate, prev_diff_rate = ~0; |
| int index; |
| |
| clk_fs_get_rate = fs->data->get_rate; |
| |
| for (index = 0; index < fs->data->rtbl_cnt; index++) { |
| prev_rate = rate; |
| |
| *params = fs->data->rtbl[index]; |
| prev_params = *params; |
| |
| clk_fs_get_rate(prate, &fs->data->rtbl[index], &rate); |
| |
| diff_rate = abs(drate - rate); |
| |
| if (diff_rate > prev_diff_rate) { |
| rate = prev_rate; |
| *params = prev_params; |
| break; |
| } |
| |
| prev_diff_rate = diff_rate; |
| |
| if (drate == rate) |
| return rate; |
| } |
| |
| |
| if (index == fs->data->rtbl_cnt) |
| *params = prev_params; |
| |
| return rate; |
| } |
| |
| static unsigned long quadfs_recalc_rate(struct clk_hw *hw, |
| unsigned long parent_rate) |
| { |
| struct st_clk_quadfs_fsynth *fs = to_quadfs_fsynth(hw); |
| unsigned long rate = 0; |
| struct stm_fs params; |
| int (*clk_fs_get_rate)(unsigned long , |
| const struct stm_fs *, unsigned long *); |
| |
| clk_fs_get_rate = fs->data->get_rate; |
| |
| if (quadfs_fsynt_get_hw_value_for_recalc(fs, ¶ms)) |
| return 0; |
| |
| if (clk_fs_get_rate(parent_rate, ¶ms, &rate)) { |
| pr_err("%s:%s error calculating rate\n", |
| clk_hw_get_name(hw), __func__); |
| } |
| |
| pr_debug("%s:%s rate %lu\n", clk_hw_get_name(hw), __func__, rate); |
| |
| return rate; |
| } |
| |
| static long quadfs_round_rate(struct clk_hw *hw, unsigned long rate, |
| unsigned long *prate) |
| { |
| struct stm_fs params; |
| |
| rate = quadfs_find_best_rate(hw, rate, *prate, ¶ms); |
| |
| pr_debug("%s: %s new rate %ld [sdiv=0x%x,md=0x%x,pe=0x%x,nsdiv3=%u]\n", |
| __func__, clk_hw_get_name(hw), |
| rate, (unsigned int)params.sdiv, (unsigned int)params.mdiv, |
| (unsigned int)params.pe, (unsigned int)params.nsdiv); |
| |
| return rate; |
| } |
| |
| |
| static void quadfs_program_and_enable(struct st_clk_quadfs_fsynth *fs, |
| struct stm_fs *params) |
| { |
| fs->md = params->mdiv; |
| fs->pe = params->pe; |
| fs->sdiv = params->sdiv; |
| fs->nsdiv = params->nsdiv; |
| |
| /* |
| * In some integrations you can only change the fsynth programming when |
| * the parent entity containing it is enabled. |
| */ |
| quadfs_fsynth_program_rate(fs); |
| quadfs_fsynth_program_enable(fs); |
| } |
| |
| static int quadfs_set_rate(struct clk_hw *hw, unsigned long rate, |
| unsigned long parent_rate) |
| { |
| struct st_clk_quadfs_fsynth *fs = to_quadfs_fsynth(hw); |
| struct stm_fs params; |
| long hwrate; |
| int uninitialized_var(i); |
| |
| if (!rate || !parent_rate) |
| return -EINVAL; |
| |
| memset(¶ms, 0, sizeof(struct stm_fs)); |
| |
| hwrate = quadfs_find_best_rate(hw, rate, parent_rate, ¶ms); |
| if (!hwrate) |
| return -EINVAL; |
| |
| quadfs_program_and_enable(fs, ¶ms); |
| |
| return 0; |
| } |
| |
| |
| |
| static const struct clk_ops st_quadfs_ops = { |
| .enable = quadfs_fsynth_enable, |
| .disable = quadfs_fsynth_disable, |
| .is_enabled = quadfs_fsynth_is_enabled, |
| .round_rate = quadfs_round_rate, |
| .set_rate = quadfs_set_rate, |
| .recalc_rate = quadfs_recalc_rate, |
| }; |
| |
| static struct clk * __init st_clk_register_quadfs_fsynth( |
| const char *name, const char *parent_name, |
| struct clkgen_quadfs_data *quadfs, void __iomem *reg, u32 chan, |
| spinlock_t *lock) |
| { |
| struct st_clk_quadfs_fsynth *fs; |
| struct clk *clk; |
| struct clk_init_data init; |
| |
| /* |
| * Sanity check required pointers, note that nsdiv3 is optional. |
| */ |
| if (WARN_ON(!name || !parent_name)) |
| return ERR_PTR(-EINVAL); |
| |
| fs = kzalloc(sizeof(*fs), GFP_KERNEL); |
| if (!fs) |
| return ERR_PTR(-ENOMEM); |
| |
| init.name = name; |
| init.ops = &st_quadfs_ops; |
| init.flags = CLK_GET_RATE_NOCACHE | CLK_IS_BASIC; |
| init.parent_names = &parent_name; |
| init.num_parents = 1; |
| |
| fs->data = quadfs; |
| fs->regs_base = reg; |
| fs->chan = chan; |
| fs->lock = lock; |
| fs->hw.init = &init; |
| |
| clk = clk_register(NULL, &fs->hw); |
| |
| if (IS_ERR(clk)) |
| kfree(fs); |
| |
| return clk; |
| } |
| |
| static const struct of_device_id quadfs_of_match[] = { |
| { |
| .compatible = "st,stih416-quadfs216", |
| .data = &st_fs216c65_416 |
| }, |
| { |
| .compatible = "st,stih416-quadfs432", |
| .data = &st_fs432c65_416 |
| }, |
| { |
| .compatible = "st,stih416-quadfs660-E", |
| .data = &st_fs660c32_E_416 |
| }, |
| { |
| .compatible = "st,stih416-quadfs660-F", |
| .data = &st_fs660c32_F_416 |
| }, |
| { |
| .compatible = "st,stih407-quadfs660-C", |
| .data = &st_fs660c32_C |
| }, |
| { |
| .compatible = "st,stih407-quadfs660-D", |
| .data = &st_fs660c32_D |
| }, |
| {} |
| }; |
| |
| static void __init st_of_create_quadfs_fsynths( |
| struct device_node *np, const char *pll_name, |
| struct clkgen_quadfs_data *quadfs, void __iomem *reg, |
| spinlock_t *lock) |
| { |
| struct clk_onecell_data *clk_data; |
| int fschan; |
| |
| clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL); |
| if (!clk_data) |
| return; |
| |
| clk_data->clk_num = QUADFS_MAX_CHAN; |
| clk_data->clks = kzalloc(QUADFS_MAX_CHAN * sizeof(struct clk *), |
| GFP_KERNEL); |
| |
| if (!clk_data->clks) { |
| kfree(clk_data); |
| return; |
| } |
| |
| for (fschan = 0; fschan < QUADFS_MAX_CHAN; fschan++) { |
| struct clk *clk; |
| const char *clk_name; |
| |
| if (of_property_read_string_index(np, "clock-output-names", |
| fschan, &clk_name)) { |
| break; |
| } |
| |
| /* |
| * If we read an empty clock name then the channel is unused |
| */ |
| if (*clk_name == '\0') |
| continue; |
| |
| clk = st_clk_register_quadfs_fsynth(clk_name, pll_name, |
| quadfs, reg, fschan, lock); |
| |
| /* |
| * If there was an error registering this clock output, clean |
| * up and move on to the next one. |
| */ |
| if (!IS_ERR(clk)) { |
| clk_data->clks[fschan] = clk; |
| pr_debug("%s: parent %s rate %u\n", |
| __clk_get_name(clk), |
| __clk_get_name(clk_get_parent(clk)), |
| (unsigned int)clk_get_rate(clk)); |
| } |
| } |
| |
| of_clk_add_provider(np, of_clk_src_onecell_get, clk_data); |
| } |
| |
| static void __init st_of_quadfs_setup(struct device_node *np) |
| { |
| const struct of_device_id *match; |
| struct clk *clk; |
| const char *pll_name, *clk_parent_name; |
| void __iomem *reg; |
| spinlock_t *lock; |
| |
| match = of_match_node(quadfs_of_match, np); |
| if (WARN_ON(!match)) |
| return; |
| |
| reg = of_iomap(np, 0); |
| if (!reg) |
| return; |
| |
| clk_parent_name = of_clk_get_parent_name(np, 0); |
| if (!clk_parent_name) |
| return; |
| |
| pll_name = kasprintf(GFP_KERNEL, "%s.pll", np->name); |
| if (!pll_name) |
| return; |
| |
| lock = kzalloc(sizeof(*lock), GFP_KERNEL); |
| if (!lock) |
| goto err_exit; |
| |
| spin_lock_init(lock); |
| |
| clk = st_clk_register_quadfs_pll(pll_name, clk_parent_name, |
| (struct clkgen_quadfs_data *) match->data, reg, lock); |
| if (IS_ERR(clk)) |
| goto err_exit; |
| else |
| pr_debug("%s: parent %s rate %u\n", |
| __clk_get_name(clk), |
| __clk_get_name(clk_get_parent(clk)), |
| (unsigned int)clk_get_rate(clk)); |
| |
| st_of_create_quadfs_fsynths(np, pll_name, |
| (struct clkgen_quadfs_data *)match->data, |
| reg, lock); |
| |
| err_exit: |
| kfree(pll_name); /* No longer need local copy of the PLL name */ |
| } |
| CLK_OF_DECLARE(quadfs, "st,quadfs", st_of_quadfs_setup); |
