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authorKuninori Morimoto <kuninori.morimoto.gx@renesas.com>2013-04-04 21:21:39 -0700
committerSimon Horman <horms+renesas@verge.net.au>2013-06-07 14:24:45 +0900
commit0c3091ad45ac975244a7c0570e10b645743bb01c (patch)
treeca54c43dd78987b2c95be0c893202a4fb5003ed0 /arch/arm/mach-shmobile/clock-r8a73a4.c
parent5e634d98635a135016d77e03de2cecbaba8d9d56 (diff)
ARM: shmobile: r8a73a4: add pll clocks
PLL clocks are basis clock for other clock. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Diffstat (limited to 'arch/arm/mach-shmobile/clock-r8a73a4.c')
-rw-r--r--arch/arm/mach-shmobile/clock-r8a73a4.c101
1 files changed, 101 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/clock-r8a73a4.c b/arch/arm/mach-shmobile/clock-r8a73a4.c
index 42942b4359dc..2be592f6dbc0 100644
--- a/arch/arm/mach-shmobile/clock-r8a73a4.c
+++ b/arch/arm/mach-shmobile/clock-r8a73a4.c
@@ -33,6 +33,14 @@
#define SMSTPCR5 0xe6150144
#define CKSCR 0xE61500C0
+#define PLLECR 0xE61500D0
+#define PLL1CR 0xE6150028
+#define PLL2CR 0xE615002C
+#define PLL2SCR 0xE61501F4
+#define PLL2HCR 0xE61501E4
+
+
+#define CPG_MAP(o) ((o - CPG_BASE) + cpg_mapping.base)
static struct clk_mapping cpg_mapping = {
.phys = CPG_BASE,
@@ -71,6 +79,86 @@ SH_FIXED_RATIO_CLK(extal1_div2_clk, extal1_clk, div2);
SH_FIXED_RATIO_CLK(extal2_div2_clk, extal2_clk, div2);
SH_FIXED_RATIO_CLK(extal2_div4_clk, extal2_clk, div4);
+/*
+ * PLL clocks
+ */
+static struct clk *pll_parent_main[] = {
+ [0] = &main_clk,
+ [1] = &main_div2_clk
+};
+
+static struct clk *pll_parent_main_extal[8] = {
+ [0] = &main_div2_clk,
+ [1] = &extal2_div2_clk,
+ [3] = &extal2_div4_clk,
+ [4] = &main_clk,
+ [5] = &extal2_clk,
+};
+
+static unsigned long pll_recalc(struct clk *clk)
+{
+ unsigned long mult = 1;
+
+ if (ioread32(CPG_MAP(PLLECR)) & (1 << clk->enable_bit))
+ mult = (((ioread32(clk->mapped_reg) >> 24) & 0x7f) + 1);
+
+ return clk->parent->rate * mult;
+}
+
+static int pll_set_parent(struct clk *clk, struct clk *parent)
+{
+ u32 val;
+ int i, ret;
+
+ if (!clk->parent_table || !clk->parent_num)
+ return -EINVAL;
+
+ /* Search the parent */
+ for (i = 0; i < clk->parent_num; i++)
+ if (clk->parent_table[i] == parent)
+ break;
+
+ if (i == clk->parent_num)
+ return -ENODEV;
+
+ ret = clk_reparent(clk, parent);
+ if (ret < 0)
+ return ret;
+
+ val = ioread32(clk->mapped_reg) &
+ ~(((1 << clk->src_width) - 1) << clk->src_shift);
+
+ iowrite32(val | i << clk->src_shift, clk->mapped_reg);
+
+ return 0;
+}
+
+static struct sh_clk_ops pll_clk_ops = {
+ .recalc = pll_recalc,
+ .set_parent = pll_set_parent,
+};
+
+#define PLL_CLOCK(name, p, pt, w, s, reg, e) \
+ static struct clk name = { \
+ .ops = &pll_clk_ops, \
+ .flags = CLK_ENABLE_ON_INIT, \
+ .parent = p, \
+ .parent_table = pt, \
+ .parent_num = ARRAY_SIZE(pt), \
+ .src_width = w, \
+ .src_shift = s, \
+ .enable_reg = (void __iomem *)reg, \
+ .enable_bit = e, \
+ .mapping = &cpg_mapping, \
+ }
+
+PLL_CLOCK(pll1_clk, &main_clk, pll_parent_main, 1, 7, PLL1CR, 1);
+PLL_CLOCK(pll2_clk, &main_div2_clk, pll_parent_main_extal, 3, 5, PLL2CR, 2);
+PLL_CLOCK(pll2s_clk, &main_div2_clk, pll_parent_main_extal, 3, 5, PLL2SCR, 4);
+PLL_CLOCK(pll2h_clk, &main_div2_clk, pll_parent_main_extal, 3, 5, PLL2HCR, 5);
+
+SH_FIXED_RATIO_CLK(pll1_div2_clk, pll1_clk, div2);
+
static struct clk *main_clks[] = {
&extalr_clk,
&extal1_clk,
@@ -80,6 +168,11 @@ static struct clk *main_clks[] = {
&extal2_div4_clk,
&main_clk,
&main_div2_clk,
+ &pll1_clk,
+ &pll1_div2_clk,
+ &pll2_clk,
+ &pll2s_clk,
+ &pll2h_clk,
};
enum {
@@ -106,6 +199,14 @@ static struct clk_lookup lookups[] = {
CLKDEV_CON_ID("extal2_div2", &extal2_div2_clk),
CLKDEV_CON_ID("extal2_div4", &extal2_div4_clk),
+ /* pll clock */
+ CLKDEV_CON_ID("pll1", &pll1_clk),
+ CLKDEV_CON_ID("pll1_div2", &pll1_div2_clk),
+ CLKDEV_CON_ID("pll2", &pll2_clk),
+ CLKDEV_CON_ID("pll2s", &pll2s_clk),
+ CLKDEV_CON_ID("pll2h", &pll2h_clk),
+
+ /* MSTP */
CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP204]),
CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP203]),
CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP206]),