diff options
| -rw-r--r-- | arch/arm/mach-imx/clk-imx51-imx53.c | 44 | ||||
| -rw-r--r-- | arch/arm/mach-imx/clk.c | 35 | ||||
| -rw-r--r-- | arch/arm/mach-imx/clk.h | 3 |
3 files changed, 46 insertions, 36 deletions
diff --git a/arch/arm/mach-imx/clk-imx51-imx53.c b/arch/arm/mach-imx/clk-imx51-imx53.c index 6fc486b6a3c6..929762742ee1 100644 --- a/arch/arm/mach-imx/clk-imx51-imx53.c +++ b/arch/arm/mach-imx/clk-imx51-imx53.c @@ -123,11 +123,13 @@ static void __init mx5_clocks_common_init(unsigned long rate_ckil, { int i; + of_clk_init(NULL); + clk[dummy] = imx_clk_fixed("dummy", 0); - clk[ckil] = imx_clk_fixed("ckil", rate_ckil); - clk[osc] = imx_clk_fixed("osc", rate_osc); - clk[ckih1] = imx_clk_fixed("ckih1", rate_ckih1); - clk[ckih2] = imx_clk_fixed("ckih2", rate_ckih2); + clk[ckil] = imx_obtain_fixed_clock("ckil", rate_ckil); + clk[osc] = imx_obtain_fixed_clock("osc", rate_osc); + clk[ckih1] = imx_obtain_fixed_clock("ckih1", rate_ckih1); + clk[ckih2] = imx_obtain_fixed_clock("ckih2", rate_ckih2); clk[lp_apm] = imx_clk_mux("lp_apm", MXC_CCM_CCSR, 9, 1, lp_apm_sel, ARRAY_SIZE(lp_apm_sel)); @@ -542,42 +544,12 @@ int __init mx53_clocks_init(unsigned long rate_ckil, unsigned long rate_osc, return 0; } -#ifdef CONFIG_OF -static void __init clk_get_freq_dt(unsigned long *ckil, unsigned long *osc, - unsigned long *ckih1, unsigned long *ckih2) -{ - struct device_node *np; - - /* retrieve the freqency of fixed clocks from device tree */ - for_each_compatible_node(np, NULL, "fixed-clock") { - u32 rate; - if (of_property_read_u32(np, "clock-frequency", &rate)) - continue; - - if (of_device_is_compatible(np, "fsl,imx-ckil")) - *ckil = rate; - else if (of_device_is_compatible(np, "fsl,imx-osc")) - *osc = rate; - else if (of_device_is_compatible(np, "fsl,imx-ckih1")) - *ckih1 = rate; - else if (of_device_is_compatible(np, "fsl,imx-ckih2")) - *ckih2 = rate; - } -} - int __init mx51_clocks_init_dt(void) { - unsigned long ckil, osc, ckih1, ckih2; - - clk_get_freq_dt(&ckil, &osc, &ckih1, &ckih2); - return mx51_clocks_init(ckil, osc, ckih1, ckih2); + return mx51_clocks_init(0, 0, 0, 0); } int __init mx53_clocks_init_dt(void) { - unsigned long ckil, osc, ckih1, ckih2; - - clk_get_freq_dt(&ckil, &osc, &ckih1, &ckih2); - return mx53_clocks_init(ckil, osc, ckih1, ckih2); + return mx53_clocks_init(0, 0, 0, 0); } -#endif diff --git a/arch/arm/mach-imx/clk.c b/arch/arm/mach-imx/clk.c index 37e884ed1cd4..53e8788b0d0f 100644 --- a/arch/arm/mach-imx/clk.c +++ b/arch/arm/mach-imx/clk.c @@ -1,4 +1,39 @@ +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/of.h> +#include <linux/slab.h> #include <linux/spinlock.h> #include "clk.h" DEFINE_SPINLOCK(imx_ccm_lock); + +static struct clk * __init imx_obtain_fixed_clock_from_dt(const char *name) +{ + struct of_phandle_args phandle = {0}; + struct clk *clk = ERR_PTR(-ENODEV); + char *path; + + path = kasprintf(GFP_KERNEL, "/clocks/%s", name); + if (!path) + return ERR_PTR(-ENOMEM); + + phandle.np = of_find_node_by_path(path); + kfree(path); + + if (phandle.np) { + clk = of_clk_get_from_provider(&phandle); + of_node_put(phandle.np); + } + return clk; +} + +struct clk * __init imx_obtain_fixed_clock( + const char *name, unsigned long rate) +{ + struct clk *clk; + + clk = imx_obtain_fixed_clock_from_dt(name); + if (IS_ERR(clk)) + clk = imx_clk_fixed(name, rate); + return clk; +} diff --git a/arch/arm/mach-imx/clk.h b/arch/arm/mach-imx/clk.h index d9d9d9c66dff..a2432c6960db 100644 --- a/arch/arm/mach-imx/clk.h +++ b/arch/arm/mach-imx/clk.h @@ -29,6 +29,9 @@ struct clk *clk_register_gate2(struct device *dev, const char *name, void __iomem *reg, u8 bit_idx, u8 clk_gate_flags, spinlock_t *lock); +struct clk * imx_obtain_fixed_clock( + const char *name, unsigned long rate); + static inline struct clk *imx_clk_gate2(const char *name, const char *parent, void __iomem *reg, u8 shift) { |