diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/clk/clk-cdce925.c | 859 |
1 files changed, 859 insertions, 0 deletions
diff --git a/drivers/clk/clk-cdce925.c b/drivers/clk/clk-cdce925.c new file mode 100644 index 000000000..d88e1d681 --- /dev/null +++ b/drivers/clk/clk-cdce925.c @@ -0,0 +1,859 @@ +/* + * Driver for TI Multi PLL CDCE913/925/937/949 clock synthesizer + * + * This driver always connects the Y1 to the input clock, Y2/Y3 to PLL1, + * Y4/Y5 to PLL2, and so on. PLL frequency is set on a first-come-first-serve + * basis. Clients can directly request any frequency that the chip can + * deliver using the standard clk framework. In addition, the device can + * be configured and activated via the devicetree. + * + * Copyright (C) 2014, Topic Embedded Products + * Licenced under GPL + */ +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> +#include <linux/gcd.h> + +/* Each chip has different number of PLLs and outputs, for example: + * The CECE925 has 2 PLLs which can be routed through dividers to 5 outputs. + * Model this as 2 PLL clocks which are parents to the outputs. + */ + +enum { + CDCE913, + CDCE925, + CDCE937, + CDCE949, +}; + +struct clk_cdce925_chip_info { + int num_plls; + int num_outputs; +}; + +static const struct clk_cdce925_chip_info clk_cdce925_chip_info_tbl[] = { + [CDCE913] = { .num_plls = 1, .num_outputs = 3 }, + [CDCE925] = { .num_plls = 2, .num_outputs = 5 }, + [CDCE937] = { .num_plls = 3, .num_outputs = 7 }, + [CDCE949] = { .num_plls = 4, .num_outputs = 9 }, +}; + +#define MAX_NUMBER_OF_PLLS 4 +#define MAX_NUMBER_OF_OUTPUTS 9 + +#define CDCE925_REG_GLOBAL1 0x01 +#define CDCE925_REG_Y1SPIPDIVH 0x02 +#define CDCE925_REG_PDIVL 0x03 +#define CDCE925_REG_XCSEL 0x05 +/* PLL parameters start at 0x10, steps of 0x10 */ +#define CDCE925_OFFSET_PLL 0x10 +/* Add CDCE925_OFFSET_PLL * (pll) to these registers before sending */ +#define CDCE925_PLL_MUX_OUTPUTS 0x14 +#define CDCE925_PLL_MULDIV 0x18 + +#define CDCE925_PLL_FREQUENCY_MIN 80000000ul +#define CDCE925_PLL_FREQUENCY_MAX 230000000ul +struct clk_cdce925_chip; + +struct clk_cdce925_output { + struct clk_hw hw; + struct clk_cdce925_chip *chip; + u8 index; + u16 pdiv; /* 1..127 for Y2-Y9; 1..1023 for Y1 */ +}; +#define to_clk_cdce925_output(_hw) \ + container_of(_hw, struct clk_cdce925_output, hw) + +struct clk_cdce925_pll { + struct clk_hw hw; + struct clk_cdce925_chip *chip; + u8 index; + u16 m; /* 1..511 */ + u16 n; /* 1..4095 */ +}; +#define to_clk_cdce925_pll(_hw) container_of(_hw, struct clk_cdce925_pll, hw) + +struct clk_cdce925_chip { + struct regmap *regmap; + struct i2c_client *i2c_client; + const struct clk_cdce925_chip_info *chip_info; + struct clk_cdce925_pll pll[MAX_NUMBER_OF_PLLS]; + struct clk_cdce925_output clk[MAX_NUMBER_OF_OUTPUTS]; +}; + +/* ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** */ + +static unsigned long cdce925_pll_calculate_rate(unsigned long parent_rate, + u16 n, u16 m) +{ + if ((!m || !n) || (m == n)) + return parent_rate; /* In bypass mode runs at same frequency */ + return mult_frac(parent_rate, (unsigned long)n, (unsigned long)m); +} + +static unsigned long cdce925_pll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + /* Output frequency of PLL is Fout = (Fin/Pdiv)*(N/M) */ + struct clk_cdce925_pll *data = to_clk_cdce925_pll(hw); + + return cdce925_pll_calculate_rate(parent_rate, data->n, data->m); +} + +static void cdce925_pll_find_rate(unsigned long rate, + unsigned long parent_rate, u16 *n, u16 *m) +{ + unsigned long un; + unsigned long um; + unsigned long g; + + if (rate <= parent_rate) { + /* Can always deliver parent_rate in bypass mode */ + rate = parent_rate; + *n = 0; + *m = 0; + } else { + /* In PLL mode, need to apply min/max range */ + if (rate < CDCE925_PLL_FREQUENCY_MIN) + rate = CDCE925_PLL_FREQUENCY_MIN; + else if (rate > CDCE925_PLL_FREQUENCY_MAX) + rate = CDCE925_PLL_FREQUENCY_MAX; + + g = gcd(rate, parent_rate); + um = parent_rate / g; + un = rate / g; + /* When outside hw range, reduce to fit (rounding errors) */ + while ((un > 4095) || (um > 511)) { + un >>= 1; + um >>= 1; + } + if (un == 0) + un = 1; + if (um == 0) + um = 1; + + *n = un; + *m = um; + } +} + +static long cdce925_pll_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + u16 n, m; + + cdce925_pll_find_rate(rate, *parent_rate, &n, &m); + return (long)cdce925_pll_calculate_rate(*parent_rate, n, m); +} + +static int cdce925_pll_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_cdce925_pll *data = to_clk_cdce925_pll(hw); + + if (!rate || (rate == parent_rate)) { + data->m = 0; /* Bypass mode */ + data->n = 0; + return 0; + } + + if ((rate < CDCE925_PLL_FREQUENCY_MIN) || + (rate > CDCE925_PLL_FREQUENCY_MAX)) { + pr_debug("%s: rate %lu outside PLL range.\n", __func__, rate); + return -EINVAL; + } + + if (rate < parent_rate) { + pr_debug("%s: rate %lu less than parent rate %lu.\n", __func__, + rate, parent_rate); + return -EINVAL; + } + + cdce925_pll_find_rate(rate, parent_rate, &data->n, &data->m); + return 0; +} + + +/* calculate p = max(0, 4 - int(log2 (n/m))) */ +static u8 cdce925_pll_calc_p(u16 n, u16 m) +{ + u8 p; + u16 r = n / m; + + if (r >= 16) + return 0; + p = 4; + while (r > 1) { + r >>= 1; + --p; + } + return p; +} + +/* Returns VCO range bits for VCO1_0_RANGE */ +static u8 cdce925_pll_calc_range_bits(struct clk_hw *hw, u16 n, u16 m) +{ + struct clk *parent = clk_get_parent(hw->clk); + unsigned long rate = clk_get_rate(parent); + + rate = mult_frac(rate, (unsigned long)n, (unsigned long)m); + if (rate >= 175000000) + return 0x3; + if (rate >= 150000000) + return 0x02; + if (rate >= 125000000) + return 0x01; + return 0x00; +} + +/* I2C clock, hence everything must happen in (un)prepare because this + * may sleep */ +static int cdce925_pll_prepare(struct clk_hw *hw) +{ + struct clk_cdce925_pll *data = to_clk_cdce925_pll(hw); + u16 n = data->n; + u16 m = data->m; + u16 r; + u8 q; + u8 p; + u16 nn; + u8 pll[4]; /* Bits are spread out over 4 byte registers */ + u8 reg_ofs = data->index * CDCE925_OFFSET_PLL; + unsigned i; + + if ((!m || !n) || (m == n)) { + /* Set PLL mux to bypass mode, leave the rest as is */ + regmap_update_bits(data->chip->regmap, + reg_ofs + CDCE925_PLL_MUX_OUTPUTS, 0x80, 0x80); + } else { + /* According to data sheet: */ + /* p = max(0, 4 - int(log2 (n/m))) */ + p = cdce925_pll_calc_p(n, m); + /* nn = n * 2^p */ + nn = n * BIT(p); + /* q = int(nn/m) */ + q = nn / m; + if ((q < 16) || (q > 63)) { + pr_debug("%s invalid q=%d\n", __func__, q); + return -EINVAL; + } + r = nn - (m*q); + if (r > 511) { + pr_debug("%s invalid r=%d\n", __func__, r); + return -EINVAL; + } + pr_debug("%s n=%d m=%d p=%d q=%d r=%d\n", __func__, + n, m, p, q, r); + /* encode into register bits */ + pll[0] = n >> 4; + pll[1] = ((n & 0x0F) << 4) | ((r >> 5) & 0x0F); + pll[2] = ((r & 0x1F) << 3) | ((q >> 3) & 0x07); + pll[3] = ((q & 0x07) << 5) | (p << 2) | + cdce925_pll_calc_range_bits(hw, n, m); + /* Write to registers */ + for (i = 0; i < ARRAY_SIZE(pll); ++i) + regmap_write(data->chip->regmap, + reg_ofs + CDCE925_PLL_MULDIV + i, pll[i]); + /* Enable PLL */ + regmap_update_bits(data->chip->regmap, + reg_ofs + CDCE925_PLL_MUX_OUTPUTS, 0x80, 0x00); + } + + return 0; +} + +static void cdce925_pll_unprepare(struct clk_hw *hw) +{ + struct clk_cdce925_pll *data = to_clk_cdce925_pll(hw); + u8 reg_ofs = data->index * CDCE925_OFFSET_PLL; + + regmap_update_bits(data->chip->regmap, + reg_ofs + CDCE925_PLL_MUX_OUTPUTS, 0x80, 0x80); +} + +static const struct clk_ops cdce925_pll_ops = { + .prepare = cdce925_pll_prepare, + .unprepare = cdce925_pll_unprepare, + .recalc_rate = cdce925_pll_recalc_rate, + .round_rate = cdce925_pll_round_rate, + .set_rate = cdce925_pll_set_rate, +}; + + +static void cdce925_clk_set_pdiv(struct clk_cdce925_output *data, u16 pdiv) +{ + switch (data->index) { + case 0: + regmap_update_bits(data->chip->regmap, + CDCE925_REG_Y1SPIPDIVH, + 0x03, (pdiv >> 8) & 0x03); + regmap_write(data->chip->regmap, 0x03, pdiv & 0xFF); + break; + case 1: + regmap_update_bits(data->chip->regmap, 0x16, 0x7F, pdiv); + break; + case 2: + regmap_update_bits(data->chip->regmap, 0x17, 0x7F, pdiv); + break; + case 3: + regmap_update_bits(data->chip->regmap, 0x26, 0x7F, pdiv); + break; + case 4: + regmap_update_bits(data->chip->regmap, 0x27, 0x7F, pdiv); + break; + case 5: + regmap_update_bits(data->chip->regmap, 0x36, 0x7F, pdiv); + break; + case 6: + regmap_update_bits(data->chip->regmap, 0x37, 0x7F, pdiv); + break; + case 7: + regmap_update_bits(data->chip->regmap, 0x46, 0x7F, pdiv); + break; + case 8: + regmap_update_bits(data->chip->regmap, 0x47, 0x7F, pdiv); + break; + } +} + +static void cdce925_clk_activate(struct clk_cdce925_output *data) +{ + switch (data->index) { + case 0: + regmap_update_bits(data->chip->regmap, + CDCE925_REG_Y1SPIPDIVH, 0x0c, 0x0c); + break; + case 1: + case 2: + regmap_update_bits(data->chip->regmap, 0x14, 0x03, 0x03); + break; + case 3: + case 4: + regmap_update_bits(data->chip->regmap, 0x24, 0x03, 0x03); + break; + case 5: + case 6: + regmap_update_bits(data->chip->regmap, 0x34, 0x03, 0x03); + break; + case 7: + case 8: + regmap_update_bits(data->chip->regmap, 0x44, 0x03, 0x03); + break; + } +} + +static int cdce925_clk_prepare(struct clk_hw *hw) +{ + struct clk_cdce925_output *data = to_clk_cdce925_output(hw); + + cdce925_clk_set_pdiv(data, data->pdiv); + cdce925_clk_activate(data); + return 0; +} + +static void cdce925_clk_unprepare(struct clk_hw *hw) +{ + struct clk_cdce925_output *data = to_clk_cdce925_output(hw); + + /* Disable clock by setting divider to "0" */ + cdce925_clk_set_pdiv(data, 0); +} + +static unsigned long cdce925_clk_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_cdce925_output *data = to_clk_cdce925_output(hw); + + if (data->pdiv) + return parent_rate / data->pdiv; + return 0; +} + +static u16 cdce925_calc_divider(unsigned long rate, + unsigned long parent_rate) +{ + unsigned long divider; + + if (!rate) + return 0; + if (rate >= parent_rate) + return 1; + + divider = DIV_ROUND_CLOSEST(parent_rate, rate); + if (divider > 0x7F) + divider = 0x7F; + + return (u16)divider; +} + +static unsigned long cdce925_clk_best_parent_rate( + struct clk_hw *hw, unsigned long rate) +{ + struct clk *pll = clk_get_parent(hw->clk); + struct clk *root = clk_get_parent(pll); + unsigned long root_rate = clk_get_rate(root); + unsigned long best_rate_error = rate; + u16 pdiv_min; + u16 pdiv_max; + u16 pdiv_best; + u16 pdiv_now; + + if (root_rate % rate == 0) + return root_rate; /* Don't need the PLL, use bypass */ + + pdiv_min = (u16)max(1ul, DIV_ROUND_UP(CDCE925_PLL_FREQUENCY_MIN, rate)); + pdiv_max = (u16)min(127ul, CDCE925_PLL_FREQUENCY_MAX / rate); + + if (pdiv_min > pdiv_max) + return 0; /* No can do? */ + + pdiv_best = pdiv_min; + for (pdiv_now = pdiv_min; pdiv_now < pdiv_max; ++pdiv_now) { + unsigned long target_rate = rate * pdiv_now; + long pll_rate = clk_round_rate(pll, target_rate); + unsigned long actual_rate; + unsigned long rate_error; + + if (pll_rate <= 0) + continue; + actual_rate = pll_rate / pdiv_now; + rate_error = abs((long)actual_rate - (long)rate); + if (rate_error < best_rate_error) { + pdiv_best = pdiv_now; + best_rate_error = rate_error; + } + /* TODO: Consider PLL frequency based on smaller n/m values + * and pick the better one if the error is equal */ + } + + return rate * pdiv_best; +} + +static long cdce925_clk_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + unsigned long l_parent_rate = *parent_rate; + u16 divider = cdce925_calc_divider(rate, l_parent_rate); + + if (l_parent_rate / divider != rate) { + l_parent_rate = cdce925_clk_best_parent_rate(hw, rate); + divider = cdce925_calc_divider(rate, l_parent_rate); + *parent_rate = l_parent_rate; + } + + if (divider) + return (long)(l_parent_rate / divider); + return 0; +} + +static int cdce925_clk_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_cdce925_output *data = to_clk_cdce925_output(hw); + + data->pdiv = cdce925_calc_divider(rate, parent_rate); + + return 0; +} + +static const struct clk_ops cdce925_clk_ops = { + .prepare = cdce925_clk_prepare, + .unprepare = cdce925_clk_unprepare, + .recalc_rate = cdce925_clk_recalc_rate, + .round_rate = cdce925_clk_round_rate, + .set_rate = cdce925_clk_set_rate, +}; + + +static u16 cdce925_y1_calc_divider(unsigned long rate, + unsigned long parent_rate) +{ + unsigned long divider; + + if (!rate) + return 0; + if (rate >= parent_rate) + return 1; + + divider = DIV_ROUND_CLOSEST(parent_rate, rate); + if (divider > 0x3FF) /* Y1 has 10-bit divider */ + divider = 0x3FF; + + return (u16)divider; +} + +static long cdce925_clk_y1_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + unsigned long l_parent_rate = *parent_rate; + u16 divider = cdce925_y1_calc_divider(rate, l_parent_rate); + + if (divider) + return (long)(l_parent_rate / divider); + return 0; +} + +static int cdce925_clk_y1_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_cdce925_output *data = to_clk_cdce925_output(hw); + + data->pdiv = cdce925_y1_calc_divider(rate, parent_rate); + + return 0; +} + +static const struct clk_ops cdce925_clk_y1_ops = { + .prepare = cdce925_clk_prepare, + .unprepare = cdce925_clk_unprepare, + .recalc_rate = cdce925_clk_recalc_rate, + .round_rate = cdce925_clk_y1_round_rate, + .set_rate = cdce925_clk_y1_set_rate, +}; + +#define CDCE925_I2C_COMMAND_BLOCK_TRANSFER 0x00 +#define CDCE925_I2C_COMMAND_BYTE_TRANSFER 0x80 + +static int cdce925_regmap_i2c_write( + void *context, const void *data, size_t count) +{ + struct device *dev = context; + struct i2c_client *i2c = to_i2c_client(dev); + int ret; + u8 reg_data[2]; + + if (count != 2) + return -ENOTSUPP; + + /* First byte is command code */ + reg_data[0] = CDCE925_I2C_COMMAND_BYTE_TRANSFER | ((u8 *)data)[0]; + reg_data[1] = ((u8 *)data)[1]; + + dev_dbg(&i2c->dev, "%s(%zu) %#x %#x\n", __func__, count, + reg_data[0], reg_data[1]); + + ret = i2c_master_send(i2c, reg_data, count); + if (likely(ret == count)) + return 0; + else if (ret < 0) + return ret; + else + return -EIO; +} + +static int cdce925_regmap_i2c_read(void *context, + const void *reg, size_t reg_size, void *val, size_t val_size) +{ + struct device *dev = context; + struct i2c_client *i2c = to_i2c_client(dev); + struct i2c_msg xfer[2]; + int ret; + u8 reg_data[2]; + + if (reg_size != 1) + return -ENOTSUPP; + + xfer[0].addr = i2c->addr; + xfer[0].flags = 0; + xfer[0].buf = reg_data; + if (val_size == 1) { + reg_data[0] = + CDCE925_I2C_COMMAND_BYTE_TRANSFER | ((u8 *)reg)[0]; + xfer[0].len = 1; + } else { + reg_data[0] = + CDCE925_I2C_COMMAND_BLOCK_TRANSFER | ((u8 *)reg)[0]; + reg_data[1] = val_size; + xfer[0].len = 2; + } + + xfer[1].addr = i2c->addr; + xfer[1].flags = I2C_M_RD; + xfer[1].len = val_size; + xfer[1].buf = val; + + ret = i2c_transfer(i2c->adapter, xfer, 2); + if (likely(ret == 2)) { + dev_dbg(&i2c->dev, "%s(%zu, %zu) %#x %#x\n", __func__, + reg_size, val_size, reg_data[0], *((u8 *)val)); + return 0; + } else if (ret < 0) + return ret; + else + return -EIO; +} + +static struct clk_hw * +of_clk_cdce925_get(struct of_phandle_args *clkspec, void *_data) +{ + struct clk_cdce925_chip *data = _data; + unsigned int idx = clkspec->args[0]; + + if (idx >= ARRAY_SIZE(data->clk)) { + pr_err("%s: invalid index %u\n", __func__, idx); + return ERR_PTR(-EINVAL); + } + + return &data->clk[idx].hw; +} + +static void cdce925_regulator_disable(void *regulator) +{ + regulator_disable(regulator); +} + +static int cdce925_regulator_enable(struct device *dev, const char *name) +{ + struct regulator *regulator; + int err; + + regulator = devm_regulator_get(dev, name); + if (IS_ERR(regulator)) + return PTR_ERR(regulator); + + err = regulator_enable(regulator); + if (err) { + dev_err(dev, "Failed to enable %s: %d\n", name, err); + return err; + } + + return devm_add_action_or_reset(dev, cdce925_regulator_disable, + regulator); +} + +/* The CDCE925 uses a funky way to read/write registers. Bulk mode is + * just weird, so just use the single byte mode exclusively. */ +static struct regmap_bus regmap_cdce925_bus = { + .write = cdce925_regmap_i2c_write, + .read = cdce925_regmap_i2c_read, +}; + +static const struct i2c_device_id cdce925_id[] = { + { "cdce913", CDCE913 }, + { "cdce925", CDCE925 }, + { "cdce937", CDCE937 }, + { "cdce949", CDCE949 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, cdce925_id); + +static int cdce925_probe(struct i2c_client *client) +{ + struct clk_cdce925_chip *data; + struct device_node *node = client->dev.of_node; + const struct i2c_device_id *id = i2c_match_id(cdce925_id, client); + const char *parent_name; + const char *pll_clk_name[MAX_NUMBER_OF_PLLS] = {NULL,}; + struct clk_init_data init; + u32 value; + int i; + int err; + struct device_node *np_output; + char child_name[6]; + struct regmap_config config = { + .name = "configuration0", + .reg_bits = 8, + .val_bits = 8, + .cache_type = REGCACHE_RBTREE, + }; + + dev_dbg(&client->dev, "%s\n", __func__); + + err = cdce925_regulator_enable(&client->dev, "vdd"); + if (err) + return err; + + err = cdce925_regulator_enable(&client->dev, "vddout"); + if (err) + return err; + + data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->i2c_client = client; + data->chip_info = &clk_cdce925_chip_info_tbl[id->driver_data]; + config.max_register = CDCE925_OFFSET_PLL + + data->chip_info->num_plls * 0x10 - 1; + data->regmap = devm_regmap_init(&client->dev, ®map_cdce925_bus, + &client->dev, &config); + if (IS_ERR(data->regmap)) { + dev_err(&client->dev, "failed to allocate register map\n"); + return PTR_ERR(data->regmap); + } + i2c_set_clientdata(client, data); + + parent_name = of_clk_get_parent_name(node, 0); + if (!parent_name) { + dev_err(&client->dev, "missing parent clock\n"); + return -ENODEV; + } + dev_dbg(&client->dev, "parent is: %s\n", parent_name); + + if (of_property_read_u32(node, "xtal-load-pf", &value) == 0) + regmap_write(data->regmap, + CDCE925_REG_XCSEL, (value << 3) & 0xF8); + /* PWDN bit */ + regmap_update_bits(data->regmap, CDCE925_REG_GLOBAL1, BIT(4), 0); + + /* Set input source for Y1 to be the XTAL */ + regmap_update_bits(data->regmap, 0x02, BIT(7), 0); + + init.ops = &cdce925_pll_ops; + init.flags = 0; + init.parent_names = &parent_name; + init.num_parents = 1; + + /* Register PLL clocks */ + for (i = 0; i < data->chip_info->num_plls; ++i) { + pll_clk_name[i] = kasprintf(GFP_KERNEL, "%pOFn.pll%d", + client->dev.of_node, i); + if (!pll_clk_name[i]) { + err = -ENOMEM; + goto error; + } + init.name = pll_clk_name[i]; + data->pll[i].chip = data; + data->pll[i].hw.init = &init; + data->pll[i].index = i; + err = devm_clk_hw_register(&client->dev, &data->pll[i].hw); + if (err) { + dev_err(&client->dev, "Failed register PLL %d\n", i); + goto error; + } + sprintf(child_name, "PLL%d", i+1); + np_output = of_get_child_by_name(node, child_name); + if (!np_output) + continue; + if (!of_property_read_u32(np_output, + "clock-frequency", &value)) { + err = clk_set_rate(data->pll[i].hw.clk, value); + if (err) + dev_err(&client->dev, + "unable to set PLL frequency %ud\n", + value); + } + if (!of_property_read_u32(np_output, + "spread-spectrum", &value)) { + u8 flag = of_property_read_bool(np_output, + "spread-spectrum-center") ? 0x80 : 0x00; + regmap_update_bits(data->regmap, + 0x16 + (i*CDCE925_OFFSET_PLL), + 0x80, flag); + regmap_update_bits(data->regmap, + 0x12 + (i*CDCE925_OFFSET_PLL), + 0x07, value & 0x07); + } + of_node_put(np_output); + } + + /* Register output clock Y1 */ + init.ops = &cdce925_clk_y1_ops; + init.flags = 0; + init.num_parents = 1; + init.parent_names = &parent_name; /* Mux Y1 to input */ + init.name = kasprintf(GFP_KERNEL, "%pOFn.Y1", client->dev.of_node); + if (!init.name) { + err = -ENOMEM; + goto error; + } + data->clk[0].chip = data; + data->clk[0].hw.init = &init; + data->clk[0].index = 0; + data->clk[0].pdiv = 1; + err = devm_clk_hw_register(&client->dev, &data->clk[0].hw); + kfree(init.name); /* clock framework made a copy of the name */ + if (err) { + dev_err(&client->dev, "clock registration Y1 failed\n"); + goto error; + } + + /* Register output clocks Y2 .. Y5*/ + init.ops = &cdce925_clk_ops; + init.flags = CLK_SET_RATE_PARENT; + init.num_parents = 1; + for (i = 1; i < data->chip_info->num_outputs; ++i) { + init.name = kasprintf(GFP_KERNEL, "%pOFn.Y%d", + client->dev.of_node, i+1); + if (!init.name) { + err = -ENOMEM; + goto error; + } + data->clk[i].chip = data; + data->clk[i].hw.init = &init; + data->clk[i].index = i; + data->clk[i].pdiv = 1; + switch (i) { + case 1: + case 2: + /* Mux Y2/3 to PLL1 */ + init.parent_names = &pll_clk_name[0]; + break; + case 3: + case 4: + /* Mux Y4/5 to PLL2 */ + init.parent_names = &pll_clk_name[1]; + break; + case 5: + case 6: + /* Mux Y6/7 to PLL3 */ + init.parent_names = &pll_clk_name[2]; + break; + case 7: + case 8: + /* Mux Y8/9 to PLL4 */ + init.parent_names = &pll_clk_name[3]; + break; + } + err = devm_clk_hw_register(&client->dev, &data->clk[i].hw); + kfree(init.name); /* clock framework made a copy of the name */ + if (err) { + dev_err(&client->dev, "clock registration failed\n"); + goto error; + } + } + + /* Register the output clocks */ + err = of_clk_add_hw_provider(client->dev.of_node, of_clk_cdce925_get, + data); + if (err) + dev_err(&client->dev, "unable to add OF clock provider\n"); + + err = 0; + +error: + for (i = 0; i < data->chip_info->num_plls; ++i) + /* clock framework made a copy of the name */ + kfree(pll_clk_name[i]); + + return err; +} + +static const struct of_device_id clk_cdce925_of_match[] = { + { .compatible = "ti,cdce913" }, + { .compatible = "ti,cdce925" }, + { .compatible = "ti,cdce937" }, + { .compatible = "ti,cdce949" }, + { }, +}; +MODULE_DEVICE_TABLE(of, clk_cdce925_of_match); + +static struct i2c_driver cdce925_driver = { + .driver = { + .name = "cdce925", + .of_match_table = of_match_ptr(clk_cdce925_of_match), + }, + .probe_new = cdce925_probe, + .id_table = cdce925_id, +}; +module_i2c_driver(cdce925_driver); + +MODULE_AUTHOR("Mike Looijmans <mike.looijmans@topic.nl>"); +MODULE_DESCRIPTION("TI CDCE913/925/937/949 driver"); +MODULE_LICENSE("GPL"); |