[PATCH 14/23] ARM: shmobile: r8a7790: add main clock
Simon Horman
horms+renesas at verge.net.au
Thu Jun 6 03:28:27 EDT 2013
From: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
Almost all clock needs main clock which is basis clock on r8a7790.
This patch adds it, and, set its parent/ratio via MD pin.
It is based on v0.05 datasheet
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
Signed-off-by: Simon Horman <horms+renesas at verge.net.au>
---
arch/arm/mach-shmobile/clock-r8a7790.c | 161 ++++++++++++++++++++++++++++++++-
1 file changed, 156 insertions(+), 5 deletions(-)
diff --git a/arch/arm/mach-shmobile/clock-r8a7790.c b/arch/arm/mach-shmobile/clock-r8a7790.c
index bad9bf2..850e47f 100644
--- a/arch/arm/mach-shmobile/clock-r8a7790.c
+++ b/arch/arm/mach-shmobile/clock-r8a7790.c
@@ -22,32 +22,113 @@
#include <linux/kernel.h>
#include <linux/sh_clk.h>
#include <linux/clkdev.h>
+#include <mach/clock.h>
#include <mach/common.h>
+/*
+ * MD EXTAL PLL0 PLL1 PLL3
+ * 14 13 19 (MHz) *1 *1
+ *---------------------------------------------------
+ * 0 0 0 15 x 1 x172/2 x208/2 x106
+ * 0 0 1 15 x 1 x172/2 x208/2 x88
+ * 0 1 0 20 x 1 x130/2 x156/2 x80
+ * 0 1 1 20 x 1 x130/2 x156/2 x66
+ * 1 0 0 26 / 2 x200/2 x240/2 x122
+ * 1 0 1 26 / 2 x200/2 x240/2 x102
+ * 1 1 0 30 / 2 x172/2 x208/2 x106
+ * 1 1 1 30 / 2 x172/2 x208/2 x88
+ *
+ * *1 : Table 7.6 indicates VCO ouput (PLLx = VCO/2)
+ * see "p1 / 2" on R8A7790_CLOCK_ROOT() below
+ */
+
+#define MD(nr) (1 << nr)
+
#define CPG_BASE 0xe6150000
#define CPG_LEN 0x1000
#define SMSTPCR2 0xe6150138
#define SMSTPCR7 0xe615014c
+#define MODEMR 0xE6160060
+
static struct clk_mapping cpg_mapping = {
.phys = CPG_BASE,
.len = CPG_LEN,
};
-static struct clk p_clk = {
- .rate = 65000000, /* shortcut for now */
+static struct clk extal_clk = {
+ /* .rate will be updated on r8a7790_clock_init() */
.mapping = &cpg_mapping,
};
-static struct clk mp_clk = {
- .rate = 52000000, /* shortcut for now */
- .mapping = &cpg_mapping,
+static struct sh_clk_ops followparent_clk_ops = {
+ .recalc = followparent_recalc,
};
+static struct clk main_clk = {
+ /* .parent will be set r8a73a4_clock_init */
+ .ops = &followparent_clk_ops,
+};
+
+/*
+ * clock ratio of these clock will be updated
+ * on r8a7790_clock_init()
+ */
+SH_FIXED_RATIO_CLK_SET(pll1_clk, main_clk, 1, 1);
+SH_FIXED_RATIO_CLK_SET(pll3_clk, main_clk, 1, 1);
+SH_FIXED_RATIO_CLK_SET(lb_clk, pll1_clk, 1, 1);
+SH_FIXED_RATIO_CLK_SET(qspi_clk, pll1_clk, 1, 1);
+
+/* fixed ratio clock */
+SH_FIXED_RATIO_CLK_SET(extal_div2_clk, extal_clk, 1, 2);
+SH_FIXED_RATIO_CLK_SET(cp_clk, extal_clk, 1, 2);
+
+SH_FIXED_RATIO_CLK_SET(pll1_div2_clk, pll1_clk, 1, 2);
+SH_FIXED_RATIO_CLK_SET(zg_clk, pll1_clk, 1, 3);
+SH_FIXED_RATIO_CLK_SET(zx_clk, pll1_clk, 1, 3);
+SH_FIXED_RATIO_CLK_SET(zs_clk, pll1_clk, 1, 6);
+SH_FIXED_RATIO_CLK_SET(hp_clk, pll1_clk, 1, 12);
+SH_FIXED_RATIO_CLK_SET(i_clk, pll1_clk, 1, 2);
+SH_FIXED_RATIO_CLK_SET(b_clk, pll1_clk, 1, 12);
+SH_FIXED_RATIO_CLK_SET(p_clk, pll1_clk, 1, 24);
+SH_FIXED_RATIO_CLK_SET(cl_clk, pll1_clk, 1, 48);
+SH_FIXED_RATIO_CLK_SET(m2_clk, pll1_clk, 1, 8);
+SH_FIXED_RATIO_CLK_SET(imp_clk, pll1_clk, 1, 4);
+SH_FIXED_RATIO_CLK_SET(rclk_clk, pll1_clk, 1, (48 * 1024));
+SH_FIXED_RATIO_CLK_SET(oscclk_clk, pll1_clk, 1, (12 * 1024));
+
+SH_FIXED_RATIO_CLK_SET(zb3_clk, pll3_clk, 1, 4);
+SH_FIXED_RATIO_CLK_SET(zb3d2_clk, pll3_clk, 1, 8);
+SH_FIXED_RATIO_CLK_SET(ddr_clk, pll3_clk, 1, 8);
+SH_FIXED_RATIO_CLK_SET(mp_clk, pll1_div2_clk, 1, 15);
+
static struct clk *main_clks[] = {
+ &extal_clk,
+ &extal_div2_clk,
+ &main_clk,
+ &pll1_clk,
+ &pll1_div2_clk,
+ &pll3_clk,
+ &lb_clk,
+ &qspi_clk,
+ &zg_clk,
+ &zx_clk,
+ &zs_clk,
+ &hp_clk,
+ &i_clk,
+ &b_clk,
&p_clk,
+ &cl_clk,
+ &m2_clk,
+ &imp_clk,
+ &rclk_clk,
+ &oscclk_clk,
+ &zb3_clk,
+ &zb3d2_clk,
+ &ddr_clk,
&mp_clk,
+ &cp_clk,
};
enum { MSTP721, MSTP720,
@@ -64,6 +145,35 @@ static struct clk mstp_clks[MSTP_NR] = {
};
static struct clk_lookup lookups[] = {
+
+ /* main clocks */
+ CLKDEV_CON_ID("extal", &extal_clk),
+ CLKDEV_CON_ID("extal_div2", &extal_div2_clk),
+ CLKDEV_CON_ID("main", &main_clk),
+ CLKDEV_CON_ID("pll1", &pll1_clk),
+ CLKDEV_CON_ID("pll1_div2", &pll1_div2_clk),
+ CLKDEV_CON_ID("pll3", &pll3_clk),
+ CLKDEV_CON_ID("zg", &zg_clk),
+ CLKDEV_CON_ID("zx", &zx_clk),
+ CLKDEV_CON_ID("zs", &zs_clk),
+ CLKDEV_CON_ID("hp", &hp_clk),
+ CLKDEV_CON_ID("i", &i_clk),
+ CLKDEV_CON_ID("b", &b_clk),
+ CLKDEV_CON_ID("lb", &lb_clk),
+ CLKDEV_CON_ID("p", &p_clk),
+ CLKDEV_CON_ID("cl", &cl_clk),
+ CLKDEV_CON_ID("m2", &m2_clk),
+ CLKDEV_CON_ID("imp", &imp_clk),
+ CLKDEV_CON_ID("rclk", &rclk_clk),
+ CLKDEV_CON_ID("oscclk", &oscclk_clk),
+ CLKDEV_CON_ID("zb3", &zb3_clk),
+ CLKDEV_CON_ID("zb3d2", &zb3d2_clk),
+ CLKDEV_CON_ID("ddr", &ddr_clk),
+ CLKDEV_CON_ID("mp", &mp_clk),
+ CLKDEV_CON_ID("qspi", &qspi_clk),
+ CLKDEV_CON_ID("cp", &cp_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]),
@@ -74,10 +184,51 @@ static struct clk_lookup lookups[] = {
CLKDEV_DEV_ID("sh-sci.7", &mstp_clks[MSTP720]),
};
+#define R8A7790_CLOCK_ROOT(e, m, p0, p1, p30, p31) \
+ extal_clk.rate = e * 1000 * 1000; \
+ main_clk.parent = m; \
+ SH_CLK_SET_RATIO(&pll1_clk_ratio, p1 / 2, 1); \
+ if (mode & MD(19)) \
+ SH_CLK_SET_RATIO(&pll3_clk_ratio, p31, 1); \
+ else \
+ SH_CLK_SET_RATIO(&pll3_clk_ratio, p30, 1)
+
+
void __init r8a7790_clock_init(void)
{
+ void __iomem *modemr = ioremap_nocache(MODEMR, PAGE_SIZE);
+ u32 mode;
int k, ret = 0;
+ BUG_ON(!modemr);
+ mode = ioread32(modemr);
+ iounmap(modemr);
+
+ switch (mode & (MD(14) | MD(13))) {
+ case 0:
+ R8A7790_CLOCK_ROOT(15, &extal_clk, 172, 208, 106, 88);
+ break;
+ case MD(13):
+ R8A7790_CLOCK_ROOT(20, &extal_clk, 130, 156, 80, 66);
+ break;
+ case MD(14):
+ R8A7790_CLOCK_ROOT(26, &extal_div2_clk, 200, 240, 122, 102);
+ break;
+ case MD(13) | MD(14):
+ R8A7790_CLOCK_ROOT(30, &extal_div2_clk, 172, 208, 106, 88);
+ break;
+ }
+
+ if (mode & (MD(18)))
+ SH_CLK_SET_RATIO(&lb_clk_ratio, 1, 36);
+ else
+ SH_CLK_SET_RATIO(&lb_clk_ratio, 1, 24);
+
+ if ((mode & (MD(3) | MD(2) | MD(1))) == MD(2))
+ SH_CLK_SET_RATIO(&qspi_clk_ratio, 1, 16);
+ else
+ SH_CLK_SET_RATIO(&qspi_clk_ratio, 1, 20);
+
for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
ret = clk_register(main_clks[k]);
--
1.8.2.1
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