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path: root/drivers/clk/clk-axi-clkgen.c
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Diffstat (limited to 'drivers/clk/clk-axi-clkgen.c')
-rw-r--r--drivers/clk/clk-axi-clkgen.c159
1 files changed, 112 insertions, 47 deletions
diff --git a/drivers/clk/clk-axi-clkgen.c b/drivers/clk/clk-axi-clkgen.c
index 934e53a96ddd..aec62301fa06 100644
--- a/drivers/clk/clk-axi-clkgen.c
+++ b/drivers/clk/clk-axi-clkgen.c
@@ -6,14 +6,17 @@
* Author: Lars-Peter Clausen <lars@metafoo.de>
*/
-#include <linux/platform_device.h>
+#include <linux/adi-axi-common.h>
+#include <linux/bits.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
-#include <linux/slab.h>
+#include <linux/err.h>
#include <linux/io.h>
-#include <linux/of.h>
#include <linux/module.h>
-#include <linux/err.h>
+#include <linux/mod_devicetable.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
#define AXI_CLKGEN_V2_REG_RESET 0x40
#define AXI_CLKGEN_V2_REG_CLKSEL 0x44
@@ -28,6 +31,9 @@
#define AXI_CLKGEN_V2_DRP_STATUS_BUSY BIT(16)
+#define ADI_CLKGEN_REG_FPGA_VOLTAGE 0x0140
+#define ADI_CLKGEN_INFO_FPGA_VOLTAGE(val) ((val) & GENMASK(15, 0))
+
#define MMCM_REG_CLKOUT5_2 0x07
#define MMCM_REG_CLKOUT0_1 0x08
#define MMCM_REG_CLKOUT0_2 0x09
@@ -90,7 +96,7 @@ static uint32_t axi_clkgen_lookup_filter(unsigned int m)
}
}
-static const uint32_t axi_clkgen_lock_table[] = {
+static const u32 axi_clkgen_lock_table[] = {
0x060603e8, 0x060603e8, 0x080803e8, 0x0b0b03e8,
0x0e0e03e8, 0x111103e8, 0x131303e8, 0x161603e8,
0x191903e8, 0x1c1c03e8, 0x1f1f0384, 0x1f1f0339,
@@ -102,7 +108,7 @@ static const uint32_t axi_clkgen_lock_table[] = {
0x1f1f012c, 0x1f1f0113, 0x1f1f0113, 0x1f1f0113,
};
-static uint32_t axi_clkgen_lookup_lock(unsigned int m)
+static u32 axi_clkgen_lookup_lock(unsigned int m)
{
if (m < ARRAY_SIZE(axi_clkgen_lock_table))
return axi_clkgen_lock_table[m];
@@ -118,14 +124,15 @@ static const struct axi_clkgen_limits axi_clkgen_zynqmp_default_limits = {
static const struct axi_clkgen_limits axi_clkgen_zynq_default_limits = {
.fpfd_min = 10000,
- .fpfd_max = 300000,
+ .fpfd_max = 450000,
.fvco_min = 600000,
.fvco_max = 1200000,
};
static void axi_clkgen_calc_params(const struct axi_clkgen_limits *limits,
- unsigned long fin, unsigned long fout,
- unsigned int *best_d, unsigned int *best_m, unsigned int *best_dout)
+ unsigned long fin, unsigned long fout,
+ unsigned int *best_d, unsigned int *best_m,
+ unsigned int *best_dout)
{
unsigned long d, d_min, d_max, _d_min, _d_max;
unsigned long m, m_min, m_max;
@@ -141,15 +148,15 @@ static void axi_clkgen_calc_params(const struct axi_clkgen_limits *limits,
*best_m = 0;
*best_dout = 0;
- d_min = max_t(unsigned long, DIV_ROUND_UP(fin, limits->fpfd_max), 1);
- d_max = min_t(unsigned long, fin / limits->fpfd_min, 80);
+ d_min = max(DIV_ROUND_UP(fin, limits->fpfd_max), 1);
+ d_max = min(fin / limits->fpfd_min, 80);
again:
fvco_min_fract = limits->fvco_min << fract_shift;
fvco_max_fract = limits->fvco_max << fract_shift;
- m_min = max_t(unsigned long, DIV_ROUND_UP(fvco_min_fract, fin) * d_min, 1);
- m_max = min_t(unsigned long, fvco_max_fract * d_max / fin, 64 << fract_shift);
+ m_min = max(DIV_ROUND_UP(fvco_min_fract, fin) * d_min, 1);
+ m_max = min(fvco_max_fract * d_max / fin, 64 << fract_shift);
for (m = m_min; m <= m_max; m++) {
_d_min = max(d_min, DIV_ROUND_UP(fin * m, fvco_max_fract));
@@ -172,7 +179,7 @@ again:
}
}
- /* Lets see if we find a better setting in fractional mode */
+ /* Let's see if we find a better setting in fractional mode */
if (fract_shift == 0) {
fract_shift = 3;
goto again;
@@ -192,9 +199,9 @@ struct axi_clkgen_div_params {
};
static void axi_clkgen_calc_clk_params(unsigned int divider,
- unsigned int frac_divider, struct axi_clkgen_div_params *params)
+ unsigned int frac_divider,
+ struct axi_clkgen_div_params *params)
{
-
memset(params, 0x0, sizeof(*params));
if (divider == 1) {
@@ -222,7 +229,7 @@ static void axi_clkgen_calc_clk_params(unsigned int divider,
if (params->edge == 0 || frac_divider == 1)
params->low--;
if (((params->edge == 0) ^ (frac_divider == 1)) ||
- (divider == 2 && frac_divider == 1))
+ (divider == 2 && frac_divider == 1))
params->frac_wf_f = 1;
params->frac_phase = params->edge * 4 + frac_divider / 2;
@@ -230,13 +237,13 @@ static void axi_clkgen_calc_clk_params(unsigned int divider,
}
static void axi_clkgen_write(struct axi_clkgen *axi_clkgen,
- unsigned int reg, unsigned int val)
+ unsigned int reg, unsigned int val)
{
writel(val, axi_clkgen->base + reg);
}
static void axi_clkgen_read(struct axi_clkgen *axi_clkgen,
- unsigned int reg, unsigned int *val)
+ unsigned int reg, unsigned int *val)
{
*val = readl(axi_clkgen->base + reg);
}
@@ -257,7 +264,7 @@ static int axi_clkgen_wait_non_busy(struct axi_clkgen *axi_clkgen)
}
static int axi_clkgen_mmcm_read(struct axi_clkgen *axi_clkgen,
- unsigned int reg, unsigned int *val)
+ unsigned int reg, unsigned int *val)
{
unsigned int reg_val;
int ret;
@@ -281,7 +288,8 @@ static int axi_clkgen_mmcm_read(struct axi_clkgen *axi_clkgen,
}
static int axi_clkgen_mmcm_write(struct axi_clkgen *axi_clkgen,
- unsigned int reg, unsigned int val, unsigned int mask)
+ unsigned int reg, unsigned int val,
+ unsigned int mask)
{
unsigned int reg_val = 0;
int ret;
@@ -302,8 +310,7 @@ static int axi_clkgen_mmcm_write(struct axi_clkgen *axi_clkgen,
return 0;
}
-static void axi_clkgen_mmcm_enable(struct axi_clkgen *axi_clkgen,
- bool enable)
+static void axi_clkgen_mmcm_enable(struct axi_clkgen *axi_clkgen, bool enable)
{
unsigned int val = AXI_CLKGEN_V2_RESET_ENABLE;
@@ -319,31 +326,31 @@ static struct axi_clkgen *clk_hw_to_axi_clkgen(struct clk_hw *clk_hw)
}
static void axi_clkgen_set_div(struct axi_clkgen *axi_clkgen,
- unsigned int reg1, unsigned int reg2, unsigned int reg3,
- struct axi_clkgen_div_params *params)
+ unsigned int reg1, unsigned int reg2,
+ unsigned int reg3,
+ struct axi_clkgen_div_params *params)
{
axi_clkgen_mmcm_write(axi_clkgen, reg1,
- (params->high << 6) | params->low, 0xefff);
+ (params->high << 6) | params->low, 0xefff);
axi_clkgen_mmcm_write(axi_clkgen, reg2,
- (params->frac << 12) | (params->frac_en << 11) |
- (params->frac_wf_r << 10) | (params->edge << 7) |
- (params->nocount << 6), 0x7fff);
+ (params->frac << 12) | (params->frac_en << 11) |
+ (params->frac_wf_r << 10) | (params->edge << 7) |
+ (params->nocount << 6), 0x7fff);
if (reg3 != 0) {
axi_clkgen_mmcm_write(axi_clkgen, reg3,
- (params->frac_phase << 11) | (params->frac_wf_f << 10), 0x3c00);
+ (params->frac_phase << 11) | (params->frac_wf_f << 10),
+ 0x3c00);
}
}
-static int axi_clkgen_set_rate(struct clk_hw *clk_hw,
- unsigned long rate, unsigned long parent_rate)
+static int axi_clkgen_set_rate(struct clk_hw *clk_hw, unsigned long rate,
+ unsigned long parent_rate)
{
struct axi_clkgen *axi_clkgen = clk_hw_to_axi_clkgen(clk_hw);
const struct axi_clkgen_limits *limits = &axi_clkgen->limits;
unsigned int d, m, dout;
struct axi_clkgen_div_params params;
- uint32_t power = 0;
- uint32_t filter;
- uint32_t lock;
+ u32 power = 0, filter, lock;
if (parent_rate == 0 || rate == 0)
return -EINVAL;
@@ -363,22 +370,22 @@ static int axi_clkgen_set_rate(struct clk_hw *clk_hw,
axi_clkgen_calc_clk_params(dout >> 3, dout & 0x7, &params);
axi_clkgen_set_div(axi_clkgen, MMCM_REG_CLKOUT0_1, MMCM_REG_CLKOUT0_2,
- MMCM_REG_CLKOUT5_2, &params);
+ MMCM_REG_CLKOUT5_2, &params);
axi_clkgen_calc_clk_params(d, 0, &params);
axi_clkgen_mmcm_write(axi_clkgen, MMCM_REG_CLK_DIV,
- (params.edge << 13) | (params.nocount << 12) |
- (params.high << 6) | params.low, 0x3fff);
+ (params.edge << 13) | (params.nocount << 12) |
+ (params.high << 6) | params.low, 0x3fff);
axi_clkgen_calc_clk_params(m >> 3, m & 0x7, &params);
axi_clkgen_set_div(axi_clkgen, MMCM_REG_CLK_FB1, MMCM_REG_CLK_FB2,
- MMCM_REG_CLKOUT6_2, &params);
+ MMCM_REG_CLKOUT6_2, &params);
axi_clkgen_mmcm_write(axi_clkgen, MMCM_REG_LOCK1, lock & 0x3ff, 0x3ff);
axi_clkgen_mmcm_write(axi_clkgen, MMCM_REG_LOCK2,
- (((lock >> 16) & 0x1f) << 10) | 0x1, 0x7fff);
+ (((lock >> 16) & 0x1f) << 10) | 0x1, 0x7fff);
axi_clkgen_mmcm_write(axi_clkgen, MMCM_REG_LOCK3,
- (((lock >> 24) & 0x1f) << 10) | 0x3e9, 0x7fff);
+ (((lock >> 24) & 0x1f) << 10) | 0x3e9, 0x7fff);
axi_clkgen_mmcm_write(axi_clkgen, MMCM_REG_FILTER1, filter >> 16, 0x9900);
axi_clkgen_mmcm_write(axi_clkgen, MMCM_REG_FILTER2, filter, 0x9900);
@@ -407,7 +414,7 @@ static int axi_clkgen_determine_rate(struct clk_hw *hw,
}
static unsigned int axi_clkgen_get_div(struct axi_clkgen *axi_clkgen,
- unsigned int reg1, unsigned int reg2)
+ unsigned int reg1, unsigned int reg2)
{
unsigned int val1, val2;
unsigned int div;
@@ -434,7 +441,7 @@ static unsigned int axi_clkgen_get_div(struct axi_clkgen *axi_clkgen,
}
static unsigned long axi_clkgen_recalc_rate(struct clk_hw *clk_hw,
- unsigned long parent_rate)
+ unsigned long parent_rate)
{
struct axi_clkgen *axi_clkgen = clk_hw_to_axi_clkgen(clk_hw);
unsigned int d, m, dout;
@@ -442,9 +449,9 @@ static unsigned long axi_clkgen_recalc_rate(struct clk_hw *clk_hw,
unsigned int val;
dout = axi_clkgen_get_div(axi_clkgen, MMCM_REG_CLKOUT0_1,
- MMCM_REG_CLKOUT0_2);
+ MMCM_REG_CLKOUT0_2);
m = axi_clkgen_get_div(axi_clkgen, MMCM_REG_CLK_FB1,
- MMCM_REG_CLK_FB2);
+ MMCM_REG_CLK_FB2);
axi_clkgen_mmcm_read(axi_clkgen, MMCM_REG_CLK_DIV, &val);
if (val & MMCM_CLK_DIV_NOCOUNT)
@@ -496,6 +503,54 @@ static u8 axi_clkgen_get_parent(struct clk_hw *clk_hw)
return parent;
}
+static int axi_clkgen_setup_limits(struct axi_clkgen *axi_clkgen,
+ struct device *dev)
+{
+ unsigned int tech, family, speed_grade, reg_value;
+
+ axi_clkgen_read(axi_clkgen, ADI_AXI_REG_FPGA_INFO, &reg_value);
+ tech = ADI_AXI_INFO_FPGA_TECH(reg_value);
+ family = ADI_AXI_INFO_FPGA_FAMILY(reg_value);
+ speed_grade = ADI_AXI_INFO_FPGA_SPEED_GRADE(reg_value);
+
+ axi_clkgen->limits.fpfd_min = 10000;
+ axi_clkgen->limits.fvco_min = 600000;
+
+ switch (speed_grade) {
+ case ADI_AXI_FPGA_SPEED_1 ... ADI_AXI_FPGA_SPEED_1LV:
+ axi_clkgen->limits.fvco_max = 1200000;
+ axi_clkgen->limits.fpfd_max = 450000;
+ break;
+ case ADI_AXI_FPGA_SPEED_2 ... ADI_AXI_FPGA_SPEED_2LV:
+ axi_clkgen->limits.fvco_max = 1440000;
+ axi_clkgen->limits.fpfd_max = 500000;
+ if (family == ADI_AXI_FPGA_FAMILY_KINTEX || family == ADI_AXI_FPGA_FAMILY_ARTIX) {
+ axi_clkgen_read(axi_clkgen, ADI_CLKGEN_REG_FPGA_VOLTAGE,
+ &reg_value);
+ if (ADI_CLKGEN_INFO_FPGA_VOLTAGE(reg_value) < 950) {
+ axi_clkgen->limits.fvco_max = 1200000;
+ axi_clkgen->limits.fpfd_max = 450000;
+ }
+ }
+ break;
+ case ADI_AXI_FPGA_SPEED_3:
+ axi_clkgen->limits.fvco_max = 1600000;
+ axi_clkgen->limits.fpfd_max = 550000;
+ break;
+ default:
+ return dev_err_probe(dev, -ENODEV, "Unknown speed grade %d\n",
+ speed_grade);
+ };
+
+ /* Overwrite vco limits for ultrascale+ */
+ if (tech == ADI_AXI_FPGA_TECH_ULTRASCALE_PLUS) {
+ axi_clkgen->limits.fvco_max = 1600000;
+ axi_clkgen->limits.fvco_min = 800000;
+ }
+
+ return 0;
+}
+
static const struct clk_ops axi_clkgen_ops = {
.recalc_rate = axi_clkgen_recalc_rate,
.determine_rate = axi_clkgen_determine_rate,
@@ -510,6 +565,7 @@ static int axi_clkgen_probe(struct platform_device *pdev)
{
const struct axi_clkgen_limits *dflt_limits;
struct axi_clkgen *axi_clkgen;
+ unsigned int pcore_version;
struct clk_init_data init;
const char *parent_names[2];
const char *clk_name;
@@ -555,11 +611,20 @@ static int axi_clkgen_probe(struct platform_device *pdev)
return -EINVAL;
}
- memcpy(&axi_clkgen->limits, dflt_limits, sizeof(axi_clkgen->limits));
+ axi_clkgen_read(axi_clkgen, ADI_AXI_REG_VERSION, &pcore_version);
+
+ if (ADI_AXI_PCORE_VER_MAJOR(pcore_version) > 0x04) {
+ ret = axi_clkgen_setup_limits(axi_clkgen, &pdev->dev);
+ if (ret)
+ return ret;
+ } else {
+ memcpy(&axi_clkgen->limits, dflt_limits,
+ sizeof(axi_clkgen->limits));
+ }
clk_name = pdev->dev.of_node->name;
of_property_read_string(pdev->dev.of_node, "clock-output-names",
- &clk_name);
+ &clk_name);
init.name = clk_name;
init.ops = &axi_clkgen_ops;
generated by cgit (git 2.34.1) at 2025-08-01 20:30:30 +0000