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author | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2013-04-12 00:42:22 -0700 |
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committer | Simon Horman <horms+renesas@verge.net.au> | 2013-06-07 14:24:48 +0900 |
commit | 8d100c0454a9960c9bf0b67e07225db5d32cca83 (patch) | |
tree | a24c2beb4c889dc295826b553cb63b98c35ad3d5 /arch/arm/mach-shmobile | |
parent | dab581139c475719caa29356727b930c0245e2af (diff) | |
download | blackbird-op-linux-8d100c0454a9960c9bf0b67e07225db5d32cca83.tar.gz blackbird-op-linux-8d100c0454a9960c9bf0b67e07225db5d32cca83.zip |
ARM: shmobile: r8a7790: add main clock
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@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Diffstat (limited to 'arch/arm/mach-shmobile')
-rw-r--r-- | arch/arm/mach-shmobile/clock-r8a7790.c | 161 |
1 files changed, 156 insertions, 5 deletions
diff --git a/arch/arm/mach-shmobile/clock-r8a7790.c b/arch/arm/mach-shmobile/clock-r8a7790.c index bad9bf2e34d6..850e47f7da48 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]); |