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>

diff --git a/drivers/clk/clk-qoriq.c b/drivers/clk/clk-qoriq.c
index 07bdfc5375ea245f01578ff91a7c9ae4160287ab..cda90a971e39b9388838fb3a35264c9c98b26083 100644 (file)
--- a/drivers/clk/clk-qoriq.c
+++ b/drivers/clk/clk-qoriq.c
@@ -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);