diff options
| author | Simon Glass <sjg@chromium.org> | 2016-01-21 19:43:41 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2016-01-21 20:42:34 -0700 |
| commit | 64b7faa7f9583d31e954c10de52275cdf2bf0ee1 (patch) | |
| tree | c8a905f1f6884fa420cd3ea993b4cf9b9422d0c8 /drivers/clk | |
| parent | 4f43673e5ac54c3c2486eee6f1c9cf5e51744f23 (diff) | |
| download | blackbird-obmc-uboot-64b7faa7f9583d31e954c10de52275cdf2bf0ee1.tar.gz blackbird-obmc-uboot-64b7faa7f9583d31e954c10de52275cdf2bf0ee1.zip | |
rockchip: clock: Add a function to find a clock by ID
The current approach of using uclass_get_device() is error-prone. Another
clock (for example a fixed-clock) may cause it to break. Add a function that
does a proper search.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/clk')
| -rw-r--r-- | drivers/clk/clk_rk3288.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/drivers/clk/clk_rk3288.c b/drivers/clk/clk_rk3288.c index df5c38cf72..fdc5347d0a 100644 --- a/drivers/clk/clk_rk3288.c +++ b/drivers/clk/clk_rk3288.c @@ -15,7 +15,9 @@ #include <asm/arch/grf_rk3288.h> #include <asm/arch/hardware.h> #include <dt-bindings/clock/rk3288-cru.h> +#include <dm/device-internal.h> #include <dm/lists.h> +#include <dm/uclass-internal.h> DECLARE_GLOBAL_DATA_PTR; @@ -139,6 +141,24 @@ static const struct pll_div apll_init_cfg = PLL_DIVISORS(APLL_HZ, 1, 1); static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 2, 2); static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 1, 2); +int rkclk_get_clk(enum rk_clk_id clk_id, struct udevice **devp) +{ + struct udevice *dev; + + for (uclass_find_first_device(UCLASS_CLK, &dev); + dev; + uclass_find_next_device(&dev)) { + struct rk3288_clk_plat *plat = dev_get_platdata(dev); + + if (plat->clk_id == clk_id) { + *devp = dev; + return device_probe(dev); + } + } + + return -ENODEV; +} + static int rkclk_set_pll(struct rk3288_cru *cru, enum rk_clk_id clk_id, const struct pll_div *div) { @@ -515,7 +535,7 @@ static ulong rk3288_get_periph_rate(struct udevice *dev, int periph) ulong new_rate, gclk_rate; int ret; - ret = uclass_get_device(UCLASS_CLK, CLK_GENERAL, &gclk); + ret = rkclk_get_clk(CLK_GENERAL, &gclk); if (ret) return ret; gclk_rate = clk_get_rate(gclk); @@ -551,7 +571,7 @@ static ulong rk3288_set_periph_rate(struct udevice *dev, int periph, ulong rate) ulong new_rate, gclk_rate; int ret; - ret = uclass_get_device(UCLASS_CLK, CLK_GENERAL, &gclk); + ret = rkclk_get_clk(CLK_GENERAL, &gclk); if (ret) return ret; gclk_rate = clk_get_rate(gclk); |
