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clk: renesas: r8a7778: Obtain mode pin values using R-Car RST driver

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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 <geert+renesas@glider.be>
Acked-by: Dirk Behme <dirk.behme@de.bosch.com>
This commit is contained in:
Geert Uytterhoeven 2016-06-01 14:46:01 +02:00
parent 65f922c78f
commit 578d601cbc
1 changed files with 13 additions and 0 deletions
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13
drivers/clk/renesas/clk-r8a7778.c
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@ -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) {