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Merge branch 'clk-vc5' into clk-next

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* clk-vc5:
  clk: vc5: Enable addition output configurations of the Versaclock
  dt: Add additional option bindings for IDT VersaClock
  clk: vc5: Allow Versaclock driver to support multiple instances
This commit is contained in:
Stephen Boyd 2020-06-23 12:12:43 -07:00
commit 7aae3c161e
3 changed files with 239 additions and 47 deletions
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33
Documentation/devicetree/bindings/clock/idt,versaclock5.txt
View File

@ -31,6 +31,29 @@ Required properties:
- 5p49v5933 and
- 5p49v5935: (optional) property not present or "clkin".
For all output ports, a corresponding, optional child node named OUT1,
OUT2, etc. can represent a each output, and the node can be used to
specify the following:
- itd,mode: can be one of the following:
- VC5_LVPECL
- VC5_CMOS
- VC5_HCSL33
- VC5_LVDS
- VC5_CMOS2
- VC5_CMOSD
- VC5_HCSL25
- idt,voltage-microvolts: can be one of the following
- 1800000
- 2500000
- 3300000
- idt,slew-percent: Percent of normal, can be one of
- 80
- 85
- 90
- 100
==Mapping between clock specifier and physical pins==
When referencing the provided clock in the DT using phandle and
@ -81,6 +104,16 @@ i2c-master-node {
/* Connect XIN input to 25MHz reference */
clocks = <&ref25m>;
clock-names = "xin";
OUT1 {
itd,mode = <VC5_CMOS>;
idt,voltage-microvolts = <1800000>;
idt,slew-percent = <80>;
};
OUT2 {
...
};
...
};
};

240
drivers/clk/clk-versaclock5.c
View File

@ -24,6 +24,8 @@
#include <linux/regmap.h>
#include <linux/slab.h>
#include <dt-bindings/clk/versaclock.h>
/* VersaClock5 registers */
#define VC5_OTP_CONTROL 0x00
@ -89,6 +91,28 @@
/* Clock control register for clock 1,2 */
#define VC5_CLK_OUTPUT_CFG(idx, n) (0x60 + ((idx) * 0x2) + (n))
#define VC5_CLK_OUTPUT_CFG0_CFG_SHIFT 5
#define VC5_CLK_OUTPUT_CFG0_CFG_MASK GENMASK(7, VC5_CLK_OUTPUT_CFG0_CFG_SHIFT)
#define VC5_CLK_OUTPUT_CFG0_CFG_LVPECL (VC5_LVPECL)
#define VC5_CLK_OUTPUT_CFG0_CFG_CMOS (VC5_CMOS)
#define VC5_CLK_OUTPUT_CFG0_CFG_HCSL33 (VC5_HCSL33)
#define VC5_CLK_OUTPUT_CFG0_CFG_LVDS (VC5_LVDS)
#define VC5_CLK_OUTPUT_CFG0_CFG_CMOS2 (VC5_CMOS2)
#define VC5_CLK_OUTPUT_CFG0_CFG_CMOSD (VC5_CMOSD)
#define VC5_CLK_OUTPUT_CFG0_CFG_HCSL25 (VC5_HCSL25)
#define VC5_CLK_OUTPUT_CFG0_PWR_SHIFT 3
#define VC5_CLK_OUTPUT_CFG0_PWR_MASK GENMASK(4, VC5_CLK_OUTPUT_CFG0_PWR_SHIFT)
#define VC5_CLK_OUTPUT_CFG0_PWR_18 (0<<VC5_CLK_OUTPUT_CFG0_PWR_SHIFT)
#define VC5_CLK_OUTPUT_CFG0_PWR_25 (2<<VC5_CLK_OUTPUT_CFG0_PWR_SHIFT)
#define VC5_CLK_OUTPUT_CFG0_PWR_33 (3<<VC5_CLK_OUTPUT_CFG0_PWR_SHIFT)
#define VC5_CLK_OUTPUT_CFG0_SLEW_SHIFT 0
#define VC5_CLK_OUTPUT_CFG0_SLEW_MASK GENMASK(1, VC5_CLK_OUTPUT_CFG0_SLEW_SHIFT)
#define VC5_CLK_OUTPUT_CFG0_SLEW_80 (0<<VC5_CLK_OUTPUT_CFG0_SLEW_SHIFT)
#define VC5_CLK_OUTPUT_CFG0_SLEW_85 (1<<VC5_CLK_OUTPUT_CFG0_SLEW_SHIFT)
#define VC5_CLK_OUTPUT_CFG0_SLEW_90 (2<<VC5_CLK_OUTPUT_CFG0_SLEW_SHIFT)
#define VC5_CLK_OUTPUT_CFG0_SLEW_100 (3<<VC5_CLK_OUTPUT_CFG0_SLEW_SHIFT)
#define VC5_CLK_OUTPUT_CFG1_EN_CLKBUF BIT(0)
#define VC5_CLK_OE_SHDN 0x68
@ -143,6 +167,8 @@ struct vc5_hw_data {
u32 div_int;
u32 div_frc;
unsigned int num;
unsigned int clk_output_cfg0;
unsigned int clk_output_cfg0_mask;
};
struct vc5_driver_data {
@ -161,30 +187,6 @@ struct vc5_driver_data {
struct vc5_hw_data clk_out[VC5_MAX_CLK_OUT_NUM];
};
static const char * const vc5_mux_names[] = {
"mux"
};
static const char * const vc5_dbl_names[] = {
"dbl"
};
static const char * const vc5_pfd_names[] = {
"pfd"
};
static const char * const vc5_pll_names[] = {
"pll"
};
static const char * const vc5_fod_names[] = {
"fod0", "fod1", "fod2", "fod3",
};
static const char * const vc5_clk_out_names[] = {
"out0_sel_i2cb", "out1", "out2", "out3", "out4",
};
/*
* VersaClock5 i2c regmap
*/
@ -591,6 +593,17 @@ static int vc5_clk_out_prepare(struct clk_hw *hw)
regmap_update_bits(vc5->regmap, VC5_CLK_OUTPUT_CFG(hwdata->num, 1),
VC5_CLK_OUTPUT_CFG1_EN_CLKBUF,
VC5_CLK_OUTPUT_CFG1_EN_CLKBUF);
if (hwdata->clk_output_cfg0_mask) {
dev_dbg(&vc5->client->dev, "Update output %d mask 0x%0X val 0x%0X\n",
hwdata->num, hwdata->clk_output_cfg0_mask,
hwdata->clk_output_cfg0);
regmap_update_bits(vc5->regmap,
VC5_CLK_OUTPUT_CFG(hwdata->num, 0),
hwdata->clk_output_cfg0_mask,
hwdata->clk_output_cfg0);
}
return 0;
}
@ -690,10 +703,123 @@ static int vc5_map_index_to_output(const enum vc5_model model,
}
}
static int vc5_update_mode(struct device_node *np_output,
struct vc5_hw_data *clk_out)
{
u32 value;
if (!of_property_read_u32(np_output, "idt,mode", &value)) {
clk_out->clk_output_cfg0_mask |= VC5_CLK_OUTPUT_CFG0_CFG_MASK;
switch (value) {
case VC5_CLK_OUTPUT_CFG0_CFG_LVPECL:
case VC5_CLK_OUTPUT_CFG0_CFG_CMOS:
case VC5_CLK_OUTPUT_CFG0_CFG_HCSL33:
case VC5_CLK_OUTPUT_CFG0_CFG_LVDS:
case VC5_CLK_OUTPUT_CFG0_CFG_CMOS2:
case VC5_CLK_OUTPUT_CFG0_CFG_CMOSD:
case VC5_CLK_OUTPUT_CFG0_CFG_HCSL25:
clk_out->clk_output_cfg0 |=
value << VC5_CLK_OUTPUT_CFG0_CFG_SHIFT;
break;
default:
return -EINVAL;
}
}
return 0;
}
static int vc5_update_power(struct device_node *np_output,
struct vc5_hw_data *clk_out)
{
u32 value;
if (!of_property_read_u32(np_output,
"idt,voltage-microvolts", &value)) {
clk_out->clk_output_cfg0_mask |= VC5_CLK_OUTPUT_CFG0_PWR_MASK;
switch (value) {
case 1800000:
clk_out->clk_output_cfg0 |= VC5_CLK_OUTPUT_CFG0_PWR_18;
break;
case 2500000:
clk_out->clk_output_cfg0 |= VC5_CLK_OUTPUT_CFG0_PWR_25;
break;
case 3300000:
clk_out->clk_output_cfg0 |= VC5_CLK_OUTPUT_CFG0_PWR_33;
break;
default:
return -EINVAL;
}
}
return 0;
}
static int vc5_update_slew(struct device_node *np_output,
struct vc5_hw_data *clk_out)
{
u32 value;
if (!of_property_read_u32(np_output, "idt,slew-percent", &value)) {
clk_out->clk_output_cfg0_mask |= VC5_CLK_OUTPUT_CFG0_SLEW_MASK;
switch (value) {
case 80:
clk_out->clk_output_cfg0 |= VC5_CLK_OUTPUT_CFG0_SLEW_80;
break;
case 85:
clk_out->clk_output_cfg0 |= VC5_CLK_OUTPUT_CFG0_SLEW_85;
break;
case 90:
clk_out->clk_output_cfg0 |= VC5_CLK_OUTPUT_CFG0_SLEW_90;
break;
case 100:
clk_out->clk_output_cfg0 |=
VC5_CLK_OUTPUT_CFG0_SLEW_100;
break;
default:
return -EINVAL;
}
}
return 0;
}
static int vc5_get_output_config(struct i2c_client *client,
struct vc5_hw_data *clk_out)
{
struct device_node *np_output;
char *child_name;
int ret = 0;
child_name = kasprintf(GFP_KERNEL, "OUT%d", clk_out->num + 1);
np_output = of_get_child_by_name(client->dev.of_node, child_name);
kfree(child_name);
if (!np_output)
goto output_done;
ret = vc5_update_mode(np_output, clk_out);
if (ret)
goto output_error;
ret = vc5_update_power(np_output, clk_out);
if (ret)
goto output_error;
ret = vc5_update_slew(np_output, clk_out);
output_error:
if (ret) {
dev_err(&client->dev,
"Invalid clock output configuration OUT%d\n",
clk_out->num + 1);
}
of_node_put(np_output);
output_done:
return ret;
}
static const struct of_device_id clk_vc5_of_match[];
static int vc5_probe(struct i2c_client *client,
const struct i2c_device_id *id)
static int vc5_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
struct vc5_driver_data *vc5;
struct clk_init_data init;
@ -742,7 +868,7 @@ static int vc5_probe(struct i2c_client *client,
if (!IS_ERR(vc5->pin_clkin)) {
vc5->clk_mux_ins |= VC5_MUX_IN_CLKIN;
parent_names[init.num_parents++] =
__clk_get_name(vc5->pin_clkin);
__clk_get_name(vc5->pin_clkin);
}
if (!init.num_parents) {
@ -750,12 +876,13 @@ static int vc5_probe(struct i2c_client *client,
return -EINVAL;
}
init.name = vc5_mux_names[0];
init.name = kasprintf(GFP_KERNEL, "%pOFn.mux", client->dev.of_node);
init.ops = &vc5_mux_ops;
init.flags = 0;
init.parent_names = parent_names;
vc5->clk_mux.init = &init;
ret = devm_clk_hw_register(&client->dev, &vc5->clk_mux);
kfree(init.name); /* clock framework made a copy of the name */
if (ret) {
dev_err(&client->dev, "unable to register %s\n", init.name);
goto err_clk;
@ -764,13 +891,16 @@ static int vc5_probe(struct i2c_client *client,
if (vc5->chip_info->flags & VC5_HAS_PFD_FREQ_DBL) {
/* Register frequency doubler */
memset(&init, 0, sizeof(init));
init.name = vc5_dbl_names[0];
init.name = kasprintf(GFP_KERNEL, "%pOFn.dbl",
client->dev.of_node);
init.ops = &vc5_dbl_ops;
init.flags = CLK_SET_RATE_PARENT;
init.parent_names = vc5_mux_names;
init.parent_names = parent_names;
parent_names[0] = clk_hw_get_name(&vc5->clk_mux);
init.num_parents = 1;
vc5->clk_mul.init = &init;
ret = devm_clk_hw_register(&client->dev, &vc5->clk_mul);
kfree(init.name); /* clock framework made a copy of the name */
if (ret) {
dev_err(&client->dev, "unable to register %s\n",
init.name);
@ -780,16 +910,18 @@ static int vc5_probe(struct i2c_client *client,
/* Register PFD */
memset(&init, 0, sizeof(init));
init.name = vc5_pfd_names[0];
init.name = kasprintf(GFP_KERNEL, "%pOFn.pfd", client->dev.of_node);
init.ops = &vc5_pfd_ops;
init.flags = CLK_SET_RATE_PARENT;
init.parent_names = parent_names;
if (vc5->chip_info->flags & VC5_HAS_PFD_FREQ_DBL)
init.parent_names = vc5_dbl_names;
parent_names[0] = clk_hw_get_name(&vc5->clk_mul);
else
init.parent_names = vc5_mux_names;
parent_names[0] = clk_hw_get_name(&vc5->clk_mux);
init.num_parents = 1;
vc5->clk_pfd.init = &init;
ret = devm_clk_hw_register(&client->dev, &vc5->clk_pfd);
kfree(init.name); /* clock framework made a copy of the name */
if (ret) {
dev_err(&client->dev, "unable to register %s\n", init.name);
goto err_clk;
@ -797,15 +929,17 @@ static int vc5_probe(struct i2c_client *client,
/* Register PLL */
memset(&init, 0, sizeof(init));
init.name = vc5_pll_names[0];
init.name = kasprintf(GFP_KERNEL, "%pOFn.pll", client->dev.of_node);
init.ops = &vc5_pll_ops;
init.flags = CLK_SET_RATE_PARENT;
init.parent_names = vc5_pfd_names;
init.parent_names = parent_names;
parent_names[0] = clk_hw_get_name(&vc5->clk_pfd);
init.num_parents = 1;
vc5->clk_pll.num = 0;
vc5->clk_pll.vc5 = vc5;
vc5->clk_pll.hw.init = &init;
ret = devm_clk_hw_register(&client->dev, &vc5->clk_pll.hw);
kfree(init.name); /* clock framework made a copy of the name */
if (ret) {
dev_err(&client->dev, "unable to register %s\n", init.name);
goto err_clk;
@ -815,15 +949,18 @@ static int vc5_probe(struct i2c_client *client,
for (n = 0; n < vc5->chip_info->clk_fod_cnt; n++) {
idx = vc5_map_index_to_output(vc5->chip_info->model, n);
memset(&init, 0, sizeof(init));
init.name = vc5_fod_names[idx];
init.name = kasprintf(GFP_KERNEL, "%pOFn.fod%d",
client->dev.of_node, idx);
init.ops = &vc5_fod_ops;
init.flags = CLK_SET_RATE_PARENT;
init.parent_names = vc5_pll_names;
init.parent_names = parent_names;
parent_names[0] = clk_hw_get_name(&vc5->clk_pll.hw);
init.num_parents = 1;
vc5->clk_fod[n].num = idx;
vc5->clk_fod[n].vc5 = vc5;
vc5->clk_fod[n].hw.init = &init;
ret = devm_clk_hw_register(&client->dev, &vc5->clk_fod[n].hw);
kfree(init.name); /* clock framework made a copy of the name */
if (ret) {
dev_err(&client->dev, "unable to register %s\n",
init.name);
@ -833,32 +970,36 @@ static int vc5_probe(struct i2c_client *client,
/* Register MUX-connected OUT0_I2C_SELB output */
memset(&init, 0, sizeof(init));
init.name = vc5_clk_out_names[0];
init.name = kasprintf(GFP_KERNEL, "%pOFn.out0_sel_i2cb",
client->dev.of_node);
init.ops = &vc5_clk_out_ops;
init.flags = CLK_SET_RATE_PARENT;
init.parent_names = vc5_mux_names;
init.parent_names = parent_names;
parent_names[0] = clk_hw_get_name(&vc5->clk_mux);
init.num_parents = 1;
vc5->clk_out[0].num = idx;
vc5->clk_out[0].vc5 = vc5;
vc5->clk_out[0].hw.init = &init;
ret = devm_clk_hw_register(&client->dev, &vc5->clk_out[0].hw);
kfree(init.name); /* clock framework made a copy of the name */
if (ret) {
dev_err(&client->dev, "unable to register %s\n",
init.name);
dev_err(&client->dev, "unable to register %s\n", init.name);
goto err_clk;
}
/* Register FOD-connected OUTx outputs */
for (n = 1; n < vc5->chip_info->clk_out_cnt; n++) {
idx = vc5_map_index_to_output(vc5->chip_info->model, n - 1);
parent_names[0] = vc5_fod_names[idx];
parent_names[0] = clk_hw_get_name(&vc5->clk_fod[idx].hw);
if (n == 1)
parent_names[1] = vc5_mux_names[0];
parent_names[1] = clk_hw_get_name(&vc5->clk_mux);
else
parent_names[1] = vc5_clk_out_names[n - 1];
parent_names[1] =
clk_hw_get_name(&vc5->clk_out[n - 1].hw);
memset(&init, 0, sizeof(init));
init.name = vc5_clk_out_names[idx + 1];
init.name = kasprintf(GFP_KERNEL, "%pOFn.out%d",
client->dev.of_node, idx + 1);
init.ops = &vc5_clk_out_ops;
init.flags = CLK_SET_RATE_PARENT;
init.parent_names = parent_names;
@ -866,13 +1007,18 @@ static int vc5_probe(struct i2c_client *client,
vc5->clk_out[n].num = idx;
vc5->clk_out[n].vc5 = vc5;
vc5->clk_out[n].hw.init = &init;
ret = devm_clk_hw_register(&client->dev,
&vc5->clk_out[n].hw);
ret = devm_clk_hw_register(&client->dev, &vc5->clk_out[n].hw);
kfree(init.name); /* clock framework made a copy of the name */
if (ret) {
dev_err(&client->dev, "unable to register %s\n",
init.name);
goto err_clk;
}
/* Fetch Clock Output configuration from DT (if specified) */
ret = vc5_get_output_config(client, &vc5->clk_out[n]);
if (ret)
goto err_clk;
}
ret = of_clk_add_hw_provider(client->dev.of_node, vc5_of_clk_get, vc5);

13
include/dt-bindings/clk/versaclock.h Normal file
View File

@ -0,0 +1,13 @@
/* SPDX-License-Identifier: GPL-2.0 */
/* This file defines field values used by the versaclock 6 family
* for defining output type
*/
#define VC5_LVPECL 0
#define VC5_CMOS 1
#define VC5_HCSL33 2
#define VC5_LVDS 3
#define VC5_CMOS2 4
#define VC5_CMOSD 5
#define VC5_HCSL25 6