ARM: OMAP2: clock: add DT boot support for cpufreq_ck

The clock and clkdev for this are added manually.

Signed-off-by: Tero Kristo <t-kristo@ti.com>

3 files changed, 56 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c b/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c
index b935ed2922d8..85e0b0c06718 100644
--- a/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c
+++ b/arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c
@@ -208,3 +208,56 @@ void omap2xxx_clkt_vps_late_init(void)
                 clk_put(c);
         }
 }
+
+#ifdef CONFIG_OF
+#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
+
+static const struct clk_ops virt_prcm_set_ops = {
+        .recalc_rate    = &omap2_table_mpu_recalc,
+        .set_rate       = &omap2_select_table_rate,
+        .round_rate     = &omap2_round_to_table_rate,
+};
+
+/**
+ * omap2xxx_clkt_vps_init - initialize virt_prcm_set clock
+ *
+ * Does a manual init for the virtual prcm DVFS clock for OMAP2. This
+ * function is called only from omap2 DT clock init, as the virtual
+ * node is not modelled in the DT clock data.
+ */
+void omap2xxx_clkt_vps_init(void)
+{
+        struct clk_init_data init = { NULL };
+        struct clk_hw_omap *hw = NULL;
+        struct clk *clk;
+        const char *parent_name = "mpu_ck";
+        struct clk_lookup *lookup = NULL;
+
+        omap2xxx_clkt_vps_late_init();
+        omap2xxx_clkt_vps_check_bootloader_rates();
+
+        hw = kzalloc(sizeof(*hw), GFP_KERNEL);
+        lookup = kzalloc(sizeof(*lookup), GFP_KERNEL);
+        if (!hw || !lookup)
+                goto cleanup;
+        init.name = "virt_prcm_set";
+        init.ops = &virt_prcm_set_ops;
+        init.parent_names = &parent_name;
+        init.num_parents = 1;
+
+        hw->hw.init = &init;
+
+        clk = clk_register(NULL, &hw->hw);
+
+        lookup->dev_id = NULL;
+        lookup->con_id = "cpufreq_ck";
+        lookup->clk = clk;
+
+        clkdev_add(lookup);
+        return;
+cleanup:
+        kfree(hw);
+        kfree(lookup);
+}
+#endif
diff --git a/drivers/clk/ti/clk-2xxx.c b/drivers/clk/ti/clk-2xxx.c
index f6400fb5ee3e..c808ab3d2bb2 100644
--- a/drivers/clk/ti/clk-2xxx.c
+++ b/drivers/clk/ti/clk-2xxx.c
@@ -229,6 +229,8 @@ static int __init omap2xxx_dt_clk_init(int soc_type)
         else
                 ti_dt_clocks_register(omap2430_clks);
 
+        omap2xxx_clkt_vps_init();
+
         omap2_clk_disable_autoidle_all();
 
         omap2_clk_enable_init_clocks(enable_init_clks,
diff --git a/include/linux/clk/ti.h b/include/linux/clk/ti.h
index 188f0cbb26c2..4231c41bed51 100644
--- a/include/linux/clk/ti.h
+++ b/include/linux/clk/ti.h
@@ -283,6 +283,7 @@ unsigned long omap2_dpllcore_recalc(struct clk_hw *hw,
 int omap2_reprogram_dpllcore(struct clk_hw *clk, unsigned long rate,
                              unsigned long parent_rate);
 void omap2xxx_clkt_dpllcore_init(struct clk_hw *hw);
+void omap2xxx_clkt_vps_init(void);
 
 void __iomem *ti_clk_get_reg_addr(struct device_node *node, int index);
 void ti_dt_clocks_register(struct ti_dt_clk *oclks);