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clk: qoriq: Add support for the platform PLL 

Change-Id: Iac11ed95f274485a86d2c11f32a3dc502bcd020f
Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com>
Acked-by: Tang Yuantian <Yuantian.Tang@freescale.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
hifive-unleashed-5.1
Emil Medve 2015-01-21 04:03:31 -06:00 committed by Michael Turquette
parent 8f0ab1e141
commit a513b72cc3
1 changed files with 83 additions and 0 deletions
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83
drivers/clk/clk-qoriq.c
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@ -271,9 +271,92 @@ static void __init sysclk_init(struct device_node *node)
if (!IS_ERR(clk))
of_clk_add_provider(np, of_clk_src_simple_get, clk);
}
static void __init pltfrm_pll_init(struct device_node *np)
{
void __iomem *base;
uint32_t mult;
const char *parent_name, *clk_name;
int i, _errno;
struct clk_onecell_data *cod;
base = of_iomap(np, 0);
if (!base) {
pr_err("%s(): %s: of_iomap() failed\n", __func__, np->name);
return;
}
/* Get the multiple of PLL */
mult = ioread32be(base);
iounmap(base);
/* Check if this PLL is disabled */
if (mult & PLL_KILL) {
pr_debug("%s(): %s: Disabled\n", __func__, np->name);
return;
}
mult = (mult & GENMASK(6, 1)) >> 1;
parent_name = of_clk_get_parent_name(np, 0);
if (!parent_name) {
pr_err("%s(): %s: of_clk_get_parent_name() failed\n",
__func__, np->name);
return;
}
i = of_property_count_strings(np, "clock-output-names");
if (i < 0) {
pr_err("%s(): %s: of_property_count_strings(clock-output-names) = %d\n",
__func__, np->name, i);
return;
}
cod = kmalloc(sizeof(*cod) + i * sizeof(struct clk *), GFP_KERNEL);
if (!cod)
return;
cod->clks = (struct clk **)(cod + 1);
cod->clk_num = i;
for (i = 0; i < cod->clk_num; i++) {
_errno = of_property_read_string_index(np, "clock-output-names",
i, &clk_name);
if (_errno < 0) {
pr_err("%s(): %s: of_property_read_string_index(clock-output-names) = %d\n",
__func__, np->name, _errno);
goto return_clk_unregister;
}
cod->clks[i] = clk_register_fixed_factor(NULL, clk_name,
parent_name, 0, mult, 1 + i);
if (IS_ERR(cod->clks[i])) {
pr_err("%s(): %s: clk_register_fixed_factor(%s) = %ld\n",
__func__, np->name,
clk_name, PTR_ERR(cod->clks[i]));
goto return_clk_unregister;
}
}
_errno = of_clk_add_provider(np, of_clk_src_onecell_get, cod);
if (_errno < 0) {
pr_err("%s(): %s: of_clk_add_provider() = %d\n",
__func__, np->name, _errno);
goto return_clk_unregister;
}
return;
return_clk_unregister:
while (--i >= 0)
clk_unregister(cod->clks[i]);
kfree(cod);
}
CLK_OF_DECLARE(qoriq_sysclk_1, "fsl,qoriq-sysclk-1.0", sysclk_init);
CLK_OF_DECLARE(qoriq_sysclk_2, "fsl,qoriq-sysclk-2.0", sysclk_init);
CLK_OF_DECLARE(qoriq_core_pll_1, "fsl,qoriq-core-pll-1.0", core_pll_init);
CLK_OF_DECLARE(qoriq_core_pll_2, "fsl,qoriq-core-pll-2.0", core_pll_init);
CLK_OF_DECLARE(qoriq_core_mux_1, "fsl,qoriq-core-mux-1.0", core_mux_init);
CLK_OF_DECLARE(qoriq_core_mux_2, "fsl,qoriq-core-mux-2.0", core_mux_init);
CLK_OF_DECLARE(qoriq_pltfrm_pll_1, "fsl,qoriq-platform-pll-1.0", pltfrm_pll_init);
CLK_OF_DECLARE(qoriq_pltfrm_pll_2, "fsl,qoriq-platform-pll-2.0", pltfrm_pll_init);