diff options
Diffstat (limited to 'drivers/clk/renesas/clk-rcar-gen2.c')
| -rw-r--r-- | drivers/clk/renesas/clk-rcar-gen2.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/clk/renesas/clk-rcar-gen2.c b/drivers/clk/renesas/clk-rcar-gen2.c index 00e6aba4b9c0..3291fd430ad4 100644 --- a/drivers/clk/renesas/clk-rcar-gen2.c +++ b/drivers/clk/renesas/clk-rcar-gen2.c @@ -19,6 +19,7 @@ #include <linux/of_address.h> #include <linux/slab.h> #include <linux/spinlock.h> +#include <linux/soc/renesas/rcar-rst.h> struct rcar_gen2_cpg { struct clk_onecell_data data; @@ -364,6 +365,23 @@ rcar_gen2_cpg_register_clock(struct device_node *np, struct rcar_gen2_cpg *cpg, 4, 0, table, &cpg->lock); } +/* + * Reset register definitions. + */ +#define MODEMR 0xe6160060 + +static u32 __init rcar_gen2_read_mode_pins(void) +{ + void __iomem *modemr = ioremap_nocache(MODEMR, 4); + u32 mode; + + BUG_ON(!modemr); + mode = ioread32(modemr); + iounmap(modemr); + + return mode; +} + static void __init rcar_gen2_cpg_clocks_init(struct device_node *np) { const struct cpg_pll_config *config; @@ -372,6 +390,13 @@ static void __init rcar_gen2_cpg_clocks_init(struct device_node *np) unsigned int i; int num_clks; + if (rcar_rst_read_mode_pins(&cpg_mode)) { + /* Backward-compatibility with old DT */ + pr_warn("%s: failed to obtain mode pins from RST\n", + np->full_name); + cpg_mode = rcar_gen2_read_mode_pins(); + } + num_clks = of_property_count_strings(np, "clock-output-names"); if (num_clks < 0) { pr_err("%s: failed to count clocks\n", __func__); |