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path: root/drivers/clk/clk-loongson2.c
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Diffstat (limited to 'drivers/clk/clk-loongson2.c')
-rw-r--r--drivers/clk/clk-loongson2.c122
1 files changed, 102 insertions, 20 deletions
diff --git a/drivers/clk/clk-loongson2.c b/drivers/clk/clk-loongson2.c
index 27e632edd484..9c4c6c99db3e 100644
--- a/drivers/clk/clk-loongson2.c
+++ b/drivers/clk/clk-loongson2.c
@@ -13,10 +13,6 @@
#include <linux/io-64-nonatomic-lo-hi.h>
#include <dt-bindings/clock/loongson,ls2k-clk.h>
-static const struct clk_parent_data pdata[] = {
- { .fw_name = "ref_100m", },
-};
-
enum loongson2_clk_type {
CLK_TYPE_PLL,
CLK_TYPE_SCALE,
@@ -42,6 +38,7 @@ struct loongson2_clk_data {
u8 div_width;
u8 mult_shift;
u8 mult_width;
+ u8 bit_idx;
};
struct loongson2_clk_board_info {
@@ -50,6 +47,7 @@ struct loongson2_clk_board_info {
const char *name;
const char *parent_name;
unsigned long fixed_rate;
+ unsigned long flags;
u8 reg_offset;
u8 div_shift;
u8 div_width;
@@ -95,6 +93,19 @@ struct loongson2_clk_board_info {
.div_width = _dwidth, \
}
+#define CLK_SCALE_MODE(_id, _name, _pname, _offset, \
+ _dshift, _dwidth, _midx) \
+ { \
+ .id = _id, \
+ .type = CLK_TYPE_SCALE, \
+ .name = _name, \
+ .parent_name = _pname, \
+ .reg_offset = _offset, \
+ .div_shift = _dshift, \
+ .div_width = _dwidth, \
+ .bit_idx = _midx + 1, \
+ }
+
#define CLK_GATE(_id, _name, _pname, _offset, _bidx) \
{ \
.id = _id, \
@@ -105,6 +116,18 @@ struct loongson2_clk_board_info {
.bit_idx = _bidx, \
}
+#define CLK_GATE_FLAGS(_id, _name, _pname, _offset, _bidx, \
+ _flags) \
+ { \
+ .id = _id, \
+ .type = CLK_TYPE_GATE, \
+ .name = _name, \
+ .parent_name = _pname, \
+ .reg_offset = _offset, \
+ .bit_idx = _bidx, \
+ .flags = _flags \
+ }
+
#define CLK_FIXED(_id, _name, _pname, _rate) \
{ \
.id = _id, \
@@ -114,6 +137,51 @@ struct loongson2_clk_board_info {
.fixed_rate = _rate, \
}
+static const struct loongson2_clk_board_info ls2k0300_clks[] = {
+ /* Reference Clock */
+ CLK_PLL(LS2K0300_NODE_PLL, "pll_node", 0x00, 15, 9, 8, 7),
+ CLK_PLL(LS2K0300_DDR_PLL, "pll_ddr", 0x08, 15, 9, 8, 7),
+ CLK_PLL(LS2K0300_PIX_PLL, "pll_pix", 0x10, 15, 9, 8, 7),
+ CLK_FIXED(LS2K0300_CLK_STABLE, "clk_stable", NULL, 100000000),
+ CLK_FIXED(LS2K0300_CLK_THSENS, "clk_thsens", NULL, 10000000),
+ /* Node PLL */
+ CLK_DIV(LS2K0300_CLK_NODE_DIV, "clk_node_div", "pll_node", 0x00, 24, 7),
+ CLK_DIV(LS2K0300_CLK_GMAC_DIV, "clk_gmac_div", "pll_node", 0x04, 0, 7),
+ CLK_DIV(LS2K0300_CLK_I2S_DIV, "clk_i2s_div", "pll_node", 0x04, 8, 7),
+ CLK_GATE(LS2K0300_CLK_NODE_PLL_GATE, "clk_node_pll_gate", "clk_node_div", 0x00, 0),
+ CLK_GATE(LS2K0300_CLK_GMAC_GATE, "clk_gmac_gate", "clk_gmac_div", 0x00, 1),
+ CLK_GATE(LS2K0300_CLK_I2S_GATE, "clk_i2s_gate", "clk_i2s_div", 0x00, 2),
+ CLK_GATE_FLAGS(LS2K0300_CLK_NODE_GATE, "clk_node_gate", "clk_node_scale", 0x24, 0,
+ CLK_IS_CRITICAL),
+ CLK_SCALE_MODE(LS2K0300_CLK_NODE_SCALE, "clk_node_scale", "clk_node_pll_gate", 0x20, 0, 3,
+ 3),
+ /* DDR PLL */
+ CLK_DIV(LS2K0300_CLK_DDR_DIV, "clk_ddr_div", "pll_ddr", 0x08, 24, 7),
+ CLK_DIV(LS2K0300_CLK_NET_DIV, "clk_net_div", "pll_ddr", 0x0c, 0, 7),
+ CLK_DIV(LS2K0300_CLK_DEV_DIV, "clk_dev_div", "pll_ddr", 0x0c, 8, 7),
+ CLK_GATE(LS2K0300_CLK_NET_GATE, "clk_net_gate", "clk_net_div", 0x08, 1),
+ CLK_GATE(LS2K0300_CLK_DEV_GATE, "clk_dev_gate", "clk_dev_div", 0x08, 2),
+ CLK_GATE_FLAGS(LS2K0300_CLK_DDR_GATE, "clk_ddr_gate", "clk_ddr_div", 0x08, 0,
+ CLK_IS_CRITICAL),
+ /* PIX PLL */
+ CLK_DIV(LS2K0300_CLK_PIX_DIV, "clk_pix_div", "pll_pix", 0x10, 24, 7),
+ CLK_DIV(LS2K0300_CLK_GMACBP_DIV, "clk_gmacbp_div", "pll_pix", 0x14, 0, 7),
+ CLK_GATE(LS2K0300_CLK_PIX_PLL_GATE, "clk_pix_pll_gate", "clk_pix_div", 0x10, 0),
+ CLK_GATE(LS2K0300_CLK_PIX_GATE, "clk_pix_gate", "clk_pix_scale", 0x24, 6),
+ CLK_GATE(LS2K0300_CLK_GMACBP_GATE, "clk_gmacbp_gate", "clk_gmacbp_div", 0x10, 1),
+ CLK_SCALE_MODE(LS2K0300_CLK_PIX_SCALE, "clk_pix_scale", "clk_pix_pll_gate", 0x20, 4, 3, 7),
+ /* clk_dev_gate */
+ CLK_DIV(LS2K0300_CLK_SDIO_SCALE, "clk_sdio_scale", "clk_dev_gate", 0x20, 24, 4),
+ CLK_GATE(LS2K0300_CLK_USB_GATE, "clk_usb_gate", "clk_usb_scale", 0x24, 2),
+ CLK_GATE(LS2K0300_CLK_SDIO_GATE, "clk_sdio_gate", "clk_sdio_scale", 0x24, 4),
+ CLK_GATE(LS2K0300_CLK_APB_GATE, "clk_apb_gate", "clk_apb_scale", 0x24, 3),
+ CLK_GATE_FLAGS(LS2K0300_CLK_BOOT_GATE, "clk_boot_gate", "clk_boot_scale", 0x24, 1,
+ CLK_IS_CRITICAL),
+ CLK_SCALE_MODE(LS2K0300_CLK_USB_SCALE, "clk_usb_scale", "clk_dev_gate", 0x20, 12, 3, 15),
+ CLK_SCALE_MODE(LS2K0300_CLK_APB_SCALE, "clk_apb_scale", "clk_dev_gate", 0x20, 16, 3, 19),
+ CLK_SCALE_MODE(LS2K0300_CLK_BOOT_SCALE, "clk_boot_scale", "clk_dev_gate", 0x20, 8, 3, 11),
+};
+
static const struct loongson2_clk_board_info ls2k0500_clks[] = {
CLK_PLL(LOONGSON2_NODE_PLL, "pll_node", 0, 16, 8, 8, 6),
CLK_PLL(LOONGSON2_DDR_PLL, "pll_ddr", 0x8, 16, 8, 8, 6),
@@ -230,20 +298,26 @@ static const struct clk_ops loongson2_pll_recalc_ops = {
static unsigned long loongson2_freqscale_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
- u64 val, mult;
+ u64 val, scale;
+ u32 mode = 0;
struct loongson2_clk_data *clk = to_loongson2_clk(hw);
val = readq(clk->reg);
- mult = loongson2_rate_part(val, clk->div_shift, clk->div_width) + 1;
+ scale = loongson2_rate_part(val, clk->div_shift, clk->div_width) + 1;
+
+ if (clk->bit_idx)
+ mode = val & BIT(clk->bit_idx - 1);
- return div_u64((u64)parent_rate * mult, 8);
+ return mode == 0 ? div_u64((u64)parent_rate * scale, 8) :
+ div_u64((u64)parent_rate, scale);
}
static const struct clk_ops loongson2_freqscale_recalc_ops = {
.recalc_rate = loongson2_freqscale_recalc_rate,
};
-static struct clk_hw *loongson2_clk_register(struct loongson2_clk_provider *clp,
+static struct clk_hw *loongson2_clk_register(const char *parent,
+ struct loongson2_clk_provider *clp,
const struct loongson2_clk_board_info *cld,
const struct clk_ops *ops)
{
@@ -260,17 +334,14 @@ static struct clk_hw *loongson2_clk_register(struct loongson2_clk_provider *clp,
init.ops = ops;
init.flags = 0;
init.num_parents = 1;
-
- if (!cld->parent_name)
- init.parent_data = pdata;
- else
- init.parent_names = &cld->parent_name;
+ init.parent_names = &parent;
clk->reg = clp->base + cld->reg_offset;
clk->div_shift = cld->div_shift;
clk->div_width = cld->div_width;
clk->mult_shift = cld->mult_shift;
clk->mult_width = cld->mult_width;
+ clk->bit_idx = cld->bit_idx;
clk->hw.init = &init;
hw = &clk->hw;
@@ -288,11 +359,17 @@ static int loongson2_clk_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct loongson2_clk_provider *clp;
const struct loongson2_clk_board_info *p, *data;
+ const char *refclk_name, *parent_name;
data = device_get_match_data(dev);
if (!data)
return -EINVAL;
+ refclk_name = of_clk_get_parent_name(dev->of_node, 0);
+ if (IS_ERR(refclk_name))
+ return dev_err_probe(dev, PTR_ERR(refclk_name),
+ "failed to get refclk name\n");
+
for (p = data; p->name; p++)
clks_num = max(clks_num, p->id + 1);
@@ -314,32 +391,36 @@ static int loongson2_clk_probe(struct platform_device *pdev)
for (i = 0; i < clks_num; i++) {
p = &data[i];
+ parent_name = p->parent_name ? p->parent_name : refclk_name;
+
switch (p->type) {
case CLK_TYPE_PLL:
- hw = loongson2_clk_register(clp, p,
+ hw = loongson2_clk_register(parent_name, clp, p,
&loongson2_pll_recalc_ops);
break;
case CLK_TYPE_SCALE:
- hw = loongson2_clk_register(clp, p,
+ hw = loongson2_clk_register(parent_name, clp, p,
&loongson2_freqscale_recalc_ops);
break;
case CLK_TYPE_DIVIDER:
hw = devm_clk_hw_register_divider(dev, p->name,
- p->parent_name, 0,
+ parent_name, 0,
clp->base + p->reg_offset,
p->div_shift, p->div_width,
- CLK_DIVIDER_ONE_BASED,
+ CLK_DIVIDER_ONE_BASED |
+ CLK_DIVIDER_ALLOW_ZERO,
&clp->clk_lock);
break;
case CLK_TYPE_GATE:
- hw = devm_clk_hw_register_gate(dev, p->name, p->parent_name, 0,
+ hw = devm_clk_hw_register_gate(dev, p->name, parent_name,
+ p->flags,
clp->base + p->reg_offset,
p->bit_idx, 0,
&clp->clk_lock);
break;
case CLK_TYPE_FIXED:
- hw = devm_clk_hw_register_fixed_rate_parent_data(dev, p->name, pdata,
- 0, p->fixed_rate);
+ hw = devm_clk_hw_register_fixed_rate(dev, p->name, parent_name,
+ 0, p->fixed_rate);
break;
default:
return dev_err_probe(dev, -EINVAL, "Invalid clk type\n");
@@ -357,6 +438,7 @@ static int loongson2_clk_probe(struct platform_device *pdev)
}
static const struct of_device_id loongson2_clk_match_table[] = {
+ { .compatible = "loongson,ls2k0300-clk", .data = &ls2k0300_clks },
{ .compatible = "loongson,ls2k0500-clk", .data = &ls2k0500_clks },
{ .compatible = "loongson,ls2k-clk", .data = &ls2k1000_clks },
{ .compatible = "loongson,ls2k2000-clk", .data = &ls2k2000_clks },
generated by cgit v1.2.3 (git 2.46.0) at 2025-10-09 16:10:43 +0000