diff options
Diffstat (limited to 'drivers/clk')
| -rw-r--r-- | drivers/clk/st/clkgen-mux.c | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/drivers/clk/st/clkgen-mux.c b/drivers/clk/st/clkgen-mux.c index 65d702c2df8d..7ccff620a2fe 100644 --- a/drivers/clk/st/clkgen-mux.c +++ b/drivers/clk/st/clkgen-mux.c @@ -18,6 +18,7 @@ #include <linux/clk-provider.h> static DEFINE_SPINLOCK(clkgena_divmux_lock); +static DEFINE_SPINLOCK(clkgenf_lock); static const char ** __init clkgen_mux_get_parents(struct device_node *np, int *num_parents) @@ -527,3 +528,274 @@ void __init st_of_clkgena_prediv_setup(struct device_node *np) return; } CLK_OF_DECLARE(clkgenaprediv, "st,clkgena-prediv", st_of_clkgena_prediv_setup); + +struct clkgen_mux_data { + u32 offset; + u8 shift; + u8 width; + spinlock_t *lock; + unsigned long clk_flags; + u8 mux_flags; +}; + +static struct clkgen_mux_data clkgen_mux_c_vcc_hd_416 = { + .offset = 0, + .shift = 0, + .width = 1, +}; + +static struct clkgen_mux_data clkgen_mux_f_vcc_fvdp_416 = { + .offset = 0, + .shift = 0, + .width = 1, +}; + +static struct clkgen_mux_data clkgen_mux_f_vcc_hva_416 = { + .offset = 0, + .shift = 0, + .width = 1, +}; + +static struct clkgen_mux_data clkgen_mux_f_vcc_hd_416 = { + .offset = 0, + .shift = 16, + .width = 1, + .lock = &clkgenf_lock, +}; + +static struct clkgen_mux_data clkgen_mux_c_vcc_sd_416 = { + .offset = 0, + .shift = 17, + .width = 1, + .lock = &clkgenf_lock, +}; + +static struct of_device_id mux_of_match[] = { + { + .compatible = "st,stih416-clkgenc-vcc-hd", + .data = &clkgen_mux_c_vcc_hd_416, + }, + { + .compatible = "st,stih416-clkgenf-vcc-fvdp", + .data = &clkgen_mux_f_vcc_fvdp_416, + }, + { + .compatible = "st,stih416-clkgenf-vcc-hva", + .data = &clkgen_mux_f_vcc_hva_416, + }, + { + .compatible = "st,stih416-clkgenf-vcc-hd", + .data = &clkgen_mux_f_vcc_hd_416, + }, + { + .compatible = "st,stih416-clkgenf-vcc-sd", + .data = &clkgen_mux_c_vcc_sd_416, + }, + {} +}; + +void __init st_of_clkgen_mux_setup(struct device_node *np) +{ + const struct of_device_id *match; + struct clk *clk; + void __iomem *reg; + const char **parents; + int num_parents; + struct clkgen_mux_data *data; + + match = of_match_node(mux_of_match, np); + if (!match) { + pr_err("%s: No matching data\n", __func__); + return; + } + + data = (struct clkgen_mux_data *)match->data; + + reg = of_iomap(np, 0); + if (!reg) { + pr_err("%s: Failed to get base address\n", __func__); + return; + } + + parents = clkgen_mux_get_parents(np, &num_parents); + if (IS_ERR(parents)) { + pr_err("%s: Failed to get parents (%ld)\n", + __func__, PTR_ERR(parents)); + return; + } + + clk = clk_register_mux(NULL, np->name, parents, num_parents, + data->clk_flags | CLK_SET_RATE_PARENT, + reg + data->offset, + data->shift, data->width, data->mux_flags, + data->lock); + if (IS_ERR(clk)) + goto err; + + pr_debug("%s: parent %s rate %u\n", + __clk_get_name(clk), + __clk_get_name(clk_get_parent(clk)), + (unsigned int)clk_get_rate(clk)); + + of_clk_add_provider(np, of_clk_src_simple_get, clk); + +err: + kfree(parents); + + return; +} +CLK_OF_DECLARE(clkgen_mux, "st,clkgen-mux", st_of_clkgen_mux_setup); + +#define VCC_MAX_CHANNELS 16 + +#define VCC_GATE_OFFSET 0x0 +#define VCC_MUX_OFFSET 0x4 +#define VCC_DIV_OFFSET 0x8 + +struct clkgen_vcc_data { + spinlock_t *lock; + unsigned long clk_flags; +}; + +static struct clkgen_vcc_data st_clkgenc_vcc_416 = { + .clk_flags = CLK_SET_RATE_PARENT, +}; + +static struct clkgen_vcc_data st_clkgenf_vcc_416 = { + .lock = &clkgenf_lock, +}; + +static struct of_device_id vcc_of_match[] = { + { .compatible = "st,stih416-clkgenc", .data = &st_clkgenc_vcc_416 }, + { .compatible = "st,stih416-clkgenf", .data = &st_clkgenf_vcc_416 }, + {} +}; + +void __init st_of_clkgen_vcc_setup(struct device_node *np) +{ + const struct of_device_id *match; + void __iomem *reg; + const char **parents; + int num_parents, i; + struct clk_onecell_data *clk_data; + struct clkgen_vcc_data *data; + + match = of_match_node(vcc_of_match, np); + if (WARN_ON(!match)) + return; + data = (struct clkgen_vcc_data *)match->data; + + reg = of_iomap(np, 0); + if (!reg) + return; + + parents = clkgen_mux_get_parents(np, &num_parents); + if (IS_ERR(parents)) + return; + + clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL); + if (!clk_data) + goto err; + + clk_data->clk_num = VCC_MAX_CHANNELS; + clk_data->clks = kzalloc(clk_data->clk_num * sizeof(struct clk *), + GFP_KERNEL); + + if (!clk_data->clks) + goto err; + + for (i = 0; i < clk_data->clk_num; i++) { + struct clk *clk; + const char *clk_name; + struct clk_gate *gate; + struct clk_divider *div; + struct clk_mux *mux; + + if (of_property_read_string_index(np, "clock-output-names", + i, &clk_name)) + break; + + /* + * If we read an empty clock name then the output is unused + */ + if (*clk_name == '\0') + continue; + + gate = kzalloc(sizeof(struct clk_gate), GFP_KERNEL); + if (!gate) + break; + + div = kzalloc(sizeof(struct clk_divider), GFP_KERNEL); + if (!div) { + kfree(gate); + break; + } + + mux = kzalloc(sizeof(struct clk_mux), GFP_KERNEL); + if (!mux) { + kfree(gate); + kfree(div); + break; + } + + gate->reg = reg + VCC_GATE_OFFSET; + gate->bit_idx = i; + gate->flags = CLK_GATE_SET_TO_DISABLE; + gate->lock = data->lock; + + div->reg = reg + VCC_DIV_OFFSET; + div->shift = 2 * i; + div->width = 2; + div->flags = CLK_DIVIDER_POWER_OF_TWO; + + mux->reg = reg + VCC_MUX_OFFSET; + mux->shift = 2 * i; + mux->mask = 0x3; + + clk = clk_register_composite(NULL, clk_name, parents, + num_parents, + &mux->hw, &clk_mux_ops, + &div->hw, &clk_divider_ops, + &gate->hw, &clk_gate_ops, + data->clk_flags); + if (IS_ERR(clk)) { + kfree(gate); + kfree(div); + kfree(mux); + goto err; + } + + pr_debug("%s: parent %s rate %u\n", + __clk_get_name(clk), + __clk_get_name(clk_get_parent(clk)), + (unsigned int)clk_get_rate(clk)); + + clk_data->clks[i] = clk; + } + + kfree(parents); + + of_clk_add_provider(np, of_clk_src_onecell_get, clk_data); + return; + +err: + for (i = 0; i < clk_data->clk_num; i++) { + struct clk_composite *composite; + + if (!clk_data->clks[i]) + continue; + + composite = container_of(__clk_get_hw(clk_data->clks[i]), + struct clk_composite, hw); + kfree(container_of(composite->gate_hw, struct clk_gate, hw)); + kfree(container_of(composite->rate_hw, struct clk_divider, hw)); + kfree(container_of(composite->mux_hw, struct clk_mux, hw)); + } + + if (clk_data) + kfree(clk_data->clks); + + kfree(clk_data); + kfree(parents); +} +CLK_OF_DECLARE(clkgen_vcc, "st,clkgen-vcc", st_of_clkgen_vcc_setup); |