diff options
| author | Lee Jones <lee.jones@linaro.org> | 2013-07-22 14:13:01 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2013-09-26 11:05:35 +0200 |
| commit | b4bdc81b5b234beb876ffc70380e05b21f64c7ac (patch) | |
| tree | 4fa91bcb42d2ef2b6fc6b69b514b620ced8f01ab /drivers/clk/ux500 | |
| parent | clk: ux500: Provide u8500_clk with skeleton Device Tree support (diff) | |
| download | linux-b4bdc81b5b234beb876ffc70380e05b21f64c7ac.tar.xz linux-b4bdc81b5b234beb876ffc70380e05b21f64c7ac.zip | |
clk: ux500: Add a 2-cell Device Tree parser for obtaining PRCC clocks
PRCC (peripheral and kernel) clocks are specified using a property tuple
<&phandle base bit>, where 'base' is the peripheral (1, 2, 3, 5 or 6),
and bit is read-in value into that peripheral stipulated by the hardware
specification.
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/clk/ux500')
| -rw-r--r-- | drivers/clk/ux500/u8500_of_clk.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/clk/ux500/u8500_of_clk.c b/drivers/clk/ux500/u8500_of_clk.c index bfbe3cae72d7..b9b3317bdc2f 100644 --- a/drivers/clk/ux500/u8500_of_clk.c +++ b/drivers/clk/ux500/u8500_of_clk.c @@ -15,6 +15,28 @@ #include <linux/platform_data/clk-ux500.h> #include "clk.h" +#define PRCC_SHOW(clk, base, bit) \ + clk[(base * PRCC_PERIPHS_PER_CLUSTER) + bit] + +struct clk *ux500_twocell_get(struct of_phandle_args *clkspec, void *data) +{ + struct clk **clk_data = data; + unsigned int base, bit; + + if (clkspec->args_count != 2) + return ERR_PTR(-EINVAL); + + base = clkspec->args[0]; + bit = clkspec->args[1]; + + if (base != 1 && base != 2 && base != 3 && base != 5 && base != 6) { + pr_err("%s: invalid PRCC base %d\n", __func__, base); + return ERR_PTR(-EINVAL); + } + + return PRCC_SHOW(clk_data, base, bit); +} + static const struct of_device_id u8500_clk_of_match[] = { { .compatible = "stericsson,u8500-clks", }, { }, |