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66d9f5214c
The prescaler works as parent rate divided by (PRES + 1) (is_pres_direct == 1) It does not work in the way of parent rate shifted to the right by (PRES + 1), which means division by 2^(PRES + 1) (is_pres_direct == 0) Thus is_pres_direct must be enabled for this SoC, to make the right computation. This field was added in commit45b0668211("clk: at91: fix programmable clock for sama5d2") SAM9X60 has the same field as SAMA5D2 in the PCK Fixes:01e2113de9("clk: at91: add sam9x60 pmc driver") Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com> Link: https://lkml.kernel.org/r/1575977088-16781-1-git-send-email-eugen.hristev@microchip.com Signed-off-by: Stephen Boyd <sboyd@kernel.org>
310 lines
8.2 KiB
C
310 lines
8.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/clk-provider.h>
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#include <linux/mfd/syscon.h>
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#include <linux/slab.h>
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#include <dt-bindings/clock/at91.h>
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#include "pmc.h"
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static DEFINE_SPINLOCK(pmc_pll_lock);
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static const struct clk_master_characteristics mck_characteristics = {
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.output = { .min = 140000000, .max = 200000000 },
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.divisors = { 1, 2, 4, 3 },
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.have_div3_pres = 1,
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};
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static const struct clk_master_layout sam9x60_master_layout = {
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.mask = 0x373,
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.pres_shift = 4,
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.offset = 0x28,
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};
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static const struct clk_range plla_outputs[] = {
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{ .min = 300000000, .max = 600000000 },
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};
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static const struct clk_pll_characteristics plla_characteristics = {
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.input = { .min = 12000000, .max = 48000000 },
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.num_output = ARRAY_SIZE(plla_outputs),
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.output = plla_outputs,
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};
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static const struct clk_range upll_outputs[] = {
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{ .min = 300000000, .max = 500000000 },
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};
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static const struct clk_pll_characteristics upll_characteristics = {
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.input = { .min = 12000000, .max = 48000000 },
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.num_output = ARRAY_SIZE(upll_outputs),
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.output = upll_outputs,
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.upll = true,
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};
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static const struct clk_programmable_layout sam9x60_programmable_layout = {
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.pres_mask = 0xff,
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.pres_shift = 8,
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.css_mask = 0x1f,
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.have_slck_mck = 0,
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.is_pres_direct = 1,
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};
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static const struct clk_pcr_layout sam9x60_pcr_layout = {
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.offset = 0x88,
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.cmd = BIT(31),
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.gckcss_mask = GENMASK(12, 8),
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.pid_mask = GENMASK(6, 0),
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};
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static const struct {
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char *n;
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char *p;
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u8 id;
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} sam9x60_systemck[] = {
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{ .n = "ddrck", .p = "masterck", .id = 2 },
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{ .n = "uhpck", .p = "usbck", .id = 6 },
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{ .n = "pck0", .p = "prog0", .id = 8 },
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{ .n = "pck1", .p = "prog1", .id = 9 },
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{ .n = "qspick", .p = "masterck", .id = 19 },
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};
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static const struct {
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char *n;
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u8 id;
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} sam9x60_periphck[] = {
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{ .n = "pioA_clk", .id = 2, },
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{ .n = "pioB_clk", .id = 3, },
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{ .n = "pioC_clk", .id = 4, },
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{ .n = "flex0_clk", .id = 5, },
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{ .n = "flex1_clk", .id = 6, },
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{ .n = "flex2_clk", .id = 7, },
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{ .n = "flex3_clk", .id = 8, },
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{ .n = "flex6_clk", .id = 9, },
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{ .n = "flex7_clk", .id = 10, },
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{ .n = "flex8_clk", .id = 11, },
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{ .n = "sdmmc0_clk", .id = 12, },
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{ .n = "flex4_clk", .id = 13, },
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{ .n = "flex5_clk", .id = 14, },
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{ .n = "flex9_clk", .id = 15, },
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{ .n = "flex10_clk", .id = 16, },
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{ .n = "tcb0_clk", .id = 17, },
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{ .n = "pwm_clk", .id = 18, },
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{ .n = "adc_clk", .id = 19, },
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{ .n = "dma0_clk", .id = 20, },
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{ .n = "matrix_clk", .id = 21, },
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{ .n = "uhphs_clk", .id = 22, },
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{ .n = "udphs_clk", .id = 23, },
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{ .n = "macb0_clk", .id = 24, },
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{ .n = "lcd_clk", .id = 25, },
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{ .n = "sdmmc1_clk", .id = 26, },
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{ .n = "macb1_clk", .id = 27, },
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{ .n = "ssc_clk", .id = 28, },
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{ .n = "can0_clk", .id = 29, },
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{ .n = "can1_clk", .id = 30, },
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{ .n = "flex11_clk", .id = 32, },
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{ .n = "flex12_clk", .id = 33, },
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{ .n = "i2s_clk", .id = 34, },
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{ .n = "qspi_clk", .id = 35, },
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{ .n = "gfx2d_clk", .id = 36, },
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{ .n = "pit64b_clk", .id = 37, },
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{ .n = "trng_clk", .id = 38, },
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{ .n = "aes_clk", .id = 39, },
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{ .n = "tdes_clk", .id = 40, },
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{ .n = "sha_clk", .id = 41, },
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{ .n = "classd_clk", .id = 42, },
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{ .n = "isi_clk", .id = 43, },
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{ .n = "pioD_clk", .id = 44, },
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{ .n = "tcb1_clk", .id = 45, },
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{ .n = "dbgu_clk", .id = 47, },
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{ .n = "mpddr_clk", .id = 49, },
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};
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static const struct {
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char *n;
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u8 id;
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struct clk_range r;
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bool pll;
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} sam9x60_gck[] = {
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{ .n = "flex0_gclk", .id = 5, },
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{ .n = "flex1_gclk", .id = 6, },
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{ .n = "flex2_gclk", .id = 7, },
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{ .n = "flex3_gclk", .id = 8, },
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{ .n = "flex6_gclk", .id = 9, },
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{ .n = "flex7_gclk", .id = 10, },
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{ .n = "flex8_gclk", .id = 11, },
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{ .n = "sdmmc0_gclk", .id = 12, .r = { .min = 0, .max = 105000000 }, },
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{ .n = "flex4_gclk", .id = 13, },
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{ .n = "flex5_gclk", .id = 14, },
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{ .n = "flex9_gclk", .id = 15, },
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{ .n = "flex10_gclk", .id = 16, },
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{ .n = "tcb0_gclk", .id = 17, },
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{ .n = "adc_gclk", .id = 19, },
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{ .n = "lcd_gclk", .id = 25, .r = { .min = 0, .max = 140000000 }, },
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{ .n = "sdmmc1_gclk", .id = 26, .r = { .min = 0, .max = 105000000 }, },
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{ .n = "flex11_gclk", .id = 32, },
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{ .n = "flex12_gclk", .id = 33, },
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{ .n = "i2s_gclk", .id = 34, .r = { .min = 0, .max = 105000000 },
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.pll = true, },
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{ .n = "pit64b_gclk", .id = 37, },
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{ .n = "classd_gclk", .id = 42, .r = { .min = 0, .max = 100000000 },
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.pll = true, },
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{ .n = "tcb1_gclk", .id = 45, },
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{ .n = "dbgu_gclk", .id = 47, },
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};
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static void __init sam9x60_pmc_setup(struct device_node *np)
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{
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struct clk_range range = CLK_RANGE(0, 0);
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const char *td_slck_name, *md_slck_name, *mainxtal_name;
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struct pmc_data *sam9x60_pmc;
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const char *parent_names[6];
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struct regmap *regmap;
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struct clk_hw *hw;
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int i;
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bool bypass;
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i = of_property_match_string(np, "clock-names", "td_slck");
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if (i < 0)
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return;
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td_slck_name = of_clk_get_parent_name(np, i);
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i = of_property_match_string(np, "clock-names", "md_slck");
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if (i < 0)
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return;
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md_slck_name = of_clk_get_parent_name(np, i);
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i = of_property_match_string(np, "clock-names", "main_xtal");
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if (i < 0)
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return;
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mainxtal_name = of_clk_get_parent_name(np, i);
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regmap = syscon_node_to_regmap(np);
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if (IS_ERR(regmap))
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return;
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sam9x60_pmc = pmc_data_allocate(PMC_MAIN + 1,
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nck(sam9x60_systemck),
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nck(sam9x60_periphck),
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nck(sam9x60_gck));
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if (!sam9x60_pmc)
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return;
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hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 24000000,
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50000000);
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if (IS_ERR(hw))
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goto err_free;
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bypass = of_property_read_bool(np, "atmel,osc-bypass");
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hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name,
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bypass);
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if (IS_ERR(hw))
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goto err_free;
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parent_names[0] = "main_rc_osc";
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parent_names[1] = "main_osc";
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hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, 2);
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if (IS_ERR(hw))
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goto err_free;
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sam9x60_pmc->chws[PMC_MAIN] = hw;
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hw = sam9x60_clk_register_pll(regmap, &pmc_pll_lock, "pllack",
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"mainck", 0, &plla_characteristics);
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if (IS_ERR(hw))
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goto err_free;
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hw = sam9x60_clk_register_pll(regmap, &pmc_pll_lock, "upllck",
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"main_osc", 1, &upll_characteristics);
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if (IS_ERR(hw))
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goto err_free;
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sam9x60_pmc->chws[PMC_UTMI] = hw;
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parent_names[0] = md_slck_name;
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parent_names[1] = "mainck";
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parent_names[2] = "pllack";
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hw = at91_clk_register_master(regmap, "masterck", 3, parent_names,
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&sam9x60_master_layout,
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&mck_characteristics);
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if (IS_ERR(hw))
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goto err_free;
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sam9x60_pmc->chws[PMC_MCK] = hw;
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parent_names[0] = "pllack";
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parent_names[1] = "upllck";
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parent_names[2] = "mainck";
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parent_names[3] = "mainck";
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hw = sam9x60_clk_register_usb(regmap, "usbck", parent_names, 4);
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if (IS_ERR(hw))
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goto err_free;
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parent_names[0] = md_slck_name;
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parent_names[1] = td_slck_name;
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parent_names[2] = "mainck";
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parent_names[3] = "masterck";
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parent_names[4] = "pllack";
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parent_names[5] = "upllck";
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for (i = 0; i < 8; i++) {
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char name[6];
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snprintf(name, sizeof(name), "prog%d", i);
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hw = at91_clk_register_programmable(regmap, name,
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parent_names, 6, i,
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&sam9x60_programmable_layout);
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if (IS_ERR(hw))
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goto err_free;
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}
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for (i = 0; i < ARRAY_SIZE(sam9x60_systemck); i++) {
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hw = at91_clk_register_system(regmap, sam9x60_systemck[i].n,
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sam9x60_systemck[i].p,
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sam9x60_systemck[i].id);
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if (IS_ERR(hw))
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goto err_free;
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sam9x60_pmc->shws[sam9x60_systemck[i].id] = hw;
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}
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for (i = 0; i < ARRAY_SIZE(sam9x60_periphck); i++) {
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hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
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&sam9x60_pcr_layout,
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sam9x60_periphck[i].n,
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"masterck",
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sam9x60_periphck[i].id,
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&range);
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if (IS_ERR(hw))
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goto err_free;
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sam9x60_pmc->phws[sam9x60_periphck[i].id] = hw;
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}
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for (i = 0; i < ARRAY_SIZE(sam9x60_gck); i++) {
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hw = at91_clk_register_generated(regmap, &pmc_pcr_lock,
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&sam9x60_pcr_layout,
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sam9x60_gck[i].n,
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parent_names, 6,
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sam9x60_gck[i].id,
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sam9x60_gck[i].pll,
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&sam9x60_gck[i].r);
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if (IS_ERR(hw))
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goto err_free;
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sam9x60_pmc->ghws[sam9x60_gck[i].id] = hw;
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}
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of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sam9x60_pmc);
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return;
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err_free:
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pmc_data_free(sam9x60_pmc);
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}
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/* Some clks are used for a clocksource */
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CLK_OF_DECLARE(sam9x60_pmc, "microchip,sam9x60-pmc", sam9x60_pmc_setup);
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