sh: Add SuperH Mobile MSTPCR bits to clock framework

[platform/kernel/linux-starfive.git] / arch / sh / kernel / cpu / sh4a / clock-sh7722.c

diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7722.c b/arch/sh/kernel/cpu/sh4a/clock-sh7722.c
index d7b1466..2f50f8a 100644 (file)
--- a/arch/sh/kernel/cpu/sh4a/clock-sh7722.c
+++ b/arch/sh/kernel/cpu/sh4a/clock-sh7722.c
@@ -14,6 +14,7 @@
 #include <linux/kernel.h>
 #include <linux/io.h>
 #include <linux/errno.h>
+#include <linux/stringify.h>
 #include <asm/clock.h>
 #include <asm/freq.h>
 
@@ -558,6 +559,115 @@ static struct clk sh7722_video_clock = {
        .ops = &sh7722_video_clk_ops,
 };
 
+static int sh7722_mstpcr_start_stop(struct clk *clk, unsigned long reg,
+                                   int enable)
+{
+       unsigned long bit = clk->arch_flags;
+       unsigned long r;
+
+       r = ctrl_inl(reg);
+
+       if (enable)
+               r &= ~(1 << bit);
+       else
+               r |= (1 << bit);
+
+       ctrl_outl(r, reg);
+       return 0;
+}
+
+static void sh7722_mstpcr0_enable(struct clk *clk)
+{
+       sh7722_mstpcr_start_stop(clk, MSTPCR0, 1);
+}
+
+static void sh7722_mstpcr0_disable(struct clk *clk)
+{
+       sh7722_mstpcr_start_stop(clk, MSTPCR0, 0);
+}
+
+static void sh7722_mstpcr1_enable(struct clk *clk)
+{
+       sh7722_mstpcr_start_stop(clk, MSTPCR1, 1);
+}
+
+static void sh7722_mstpcr1_disable(struct clk *clk)
+{
+       sh7722_mstpcr_start_stop(clk, MSTPCR1, 0);
+}
+
+static void sh7722_mstpcr2_enable(struct clk *clk)
+{
+       sh7722_mstpcr_start_stop(clk, MSTPCR2, 1);
+}
+
+static void sh7722_mstpcr2_disable(struct clk *clk)
+{
+       sh7722_mstpcr_start_stop(clk, MSTPCR2, 0);
+}
+
+static struct clk_ops sh7722_mstpcr0_clk_ops = {
+       .enable = sh7722_mstpcr0_enable,
+       .disable = sh7722_mstpcr0_disable,
+};
+
+static struct clk_ops sh7722_mstpcr1_clk_ops = {
+       .enable = sh7722_mstpcr1_enable,
+       .disable = sh7722_mstpcr1_disable,
+};
+
+static struct clk_ops sh7722_mstpcr2_clk_ops = {
+       .enable = sh7722_mstpcr2_enable,
+       .disable = sh7722_mstpcr2_disable,
+};
+
+#define DECLARE_MSTPCRN(regnr, bitnr, bitstr)          \
+{                                                      \
+       .name = "mstp" __stringify(regnr) bitstr,       \
+       .arch_flags = bitnr,                            \
+       .ops = &sh7722_mstpcr ## regnr ## _clk_ops,     \
+}
+
+#define DECLARE_MSTPCR(regnr) \
+       DECLARE_MSTPCRN(regnr, 31, "31"), \
+       DECLARE_MSTPCRN(regnr, 30, "30"), \
+       DECLARE_MSTPCRN(regnr, 29, "29"), \
+       DECLARE_MSTPCRN(regnr, 28, "28"), \
+       DECLARE_MSTPCRN(regnr, 27, "27"), \
+       DECLARE_MSTPCRN(regnr, 26, "26"), \
+       DECLARE_MSTPCRN(regnr, 25, "25"), \
+       DECLARE_MSTPCRN(regnr, 24, "24"), \
+       DECLARE_MSTPCRN(regnr, 23, "23"), \
+       DECLARE_MSTPCRN(regnr, 22, "22"), \
+       DECLARE_MSTPCRN(regnr, 21, "21"), \
+       DECLARE_MSTPCRN(regnr, 20, "20"), \
+       DECLARE_MSTPCRN(regnr, 19, "19"), \
+       DECLARE_MSTPCRN(regnr, 18, "18"), \
+       DECLARE_MSTPCRN(regnr, 17, "17"), \
+       DECLARE_MSTPCRN(regnr, 16, "16"), \
+       DECLARE_MSTPCRN(regnr, 15, "15"), \
+       DECLARE_MSTPCRN(regnr, 14, "14"), \
+       DECLARE_MSTPCRN(regnr, 13, "13"), \
+       DECLARE_MSTPCRN(regnr, 12, "12"), \
+       DECLARE_MSTPCRN(regnr, 11, "11"), \
+       DECLARE_MSTPCRN(regnr, 10, "10"), \
+       DECLARE_MSTPCRN(regnr, 9, "09"), \
+       DECLARE_MSTPCRN(regnr, 8, "08"), \
+       DECLARE_MSTPCRN(regnr, 7, "07"), \
+       DECLARE_MSTPCRN(regnr, 6, "06"), \
+       DECLARE_MSTPCRN(regnr, 5, "05"), \
+       DECLARE_MSTPCRN(regnr, 4, "04"), \
+       DECLARE_MSTPCRN(regnr, 3, "03"), \
+       DECLARE_MSTPCRN(regnr, 2, "02"), \
+       DECLARE_MSTPCRN(regnr, 1, "01"), \
+       DECLARE_MSTPCRN(regnr, 0, "00")
+
+static struct clk sh7722_mstpcr[] = {
+       DECLARE_MSTPCR(0),
+       DECLARE_MSTPCR(1),
+       DECLARE_MSTPCR(2),
+};
+
 static struct clk *sh7722_clocks[] = {
        &sh7722_umem_clock,
        &sh7722_sh_clock,
@@ -600,5 +710,11 @@ int __init arch_clk_init(void)
                clk_register(sh7722_clocks[i]);
        }
        clk_put(master);
+
+       for (i = 0; i < ARRAY_SIZE(sh7722_mstpcr); i++) {
+               pr_debug( "Registering mstpcr '%s'\n", sh7722_mstpcr[i].name);
+               clk_register(&sh7722_mstpcr[i]);
+       }
+
        return 0;
 }