[PATCH/RFC v3 11/22] clk: renesas: r8a7778: Obtain mode pin values using R-Car RST driver
From: Geert Uytterhoeven <hidden>
Date: 2016-06-01 19:21:09
Also in:
linux-renesas-soc
Subsystem:
common clk framework, renesas clock drivers, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Geert Uytterhoeven, Linus Torvalds
Obtain the values of the mode pins from the R-Car RST driver, which relies on the presence in DT of a device node for the RESET/WDT module. Signed-off-by: Geert Uytterhoeven <redacted> --- v3: - New. --- drivers/clk/renesas/clk-r8a7778.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/drivers/clk/renesas/clk-r8a7778.c b/drivers/clk/renesas/clk-r8a7778.c
index 40e3a501a50e200f..07ea411098a75ad1 100644
--- a/drivers/clk/renesas/clk-r8a7778.c
+++ b/drivers/clk/renesas/clk-r8a7778.c@@ -12,6 +12,7 @@ #include <linux/clk/renesas.h> #include <linux/of_address.h> #include <linux/slab.h> +#include <linux/soc/renesas/rcar-rst.h> struct r8a7778_cpg { struct clk_onecell_data data;
@@ -83,6 +84,18 @@ static void __init r8a7778_cpg_clocks_init(struct device_node *np) struct clk **clks; unsigned int i; int num_clks; + u32 mode; + + if (rcar_rst_read_mode_pins(&mode)) + return; + + BUG_ON(!(mode & BIT(19))); + + cpg_mode_rates = (!!(mode & BIT(18)) << 2) | + (!!(mode & BIT(12)) << 1) | + (!!(mode & BIT(11))); + cpg_mode_divs = (!!(mode & BIT(2)) << 1) | + (!!(mode & BIT(1))); num_clks = of_property_count_strings(np, "clock-output-names"); if (num_clks < 0) {
--
1.9.1
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