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ARM: mach-shmobile: clock-r8a7779: add DIV4 clock support 

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Kuninori Morimoto 2011-12-20 00:52:06 -08:00 committed by Paul Mundt
parent db5eb994d3
commit b5813c7386
1 changed files with 59 additions and 17 deletions
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76
arch/arm/mach-shmobile/clock-r8a7779.c
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@ -45,36 +45,75 @@ static struct clk_mapping cpg_mapping = {
.len = 0x80, .len = 0x80,
}; };
static struct clk clkp = { /*
.rate = 62500000, /* FIXME: shortcut */ * Default rate for the root input clock, reset this with clk_set_rate()
.flags = CLK_ENABLE_ON_INIT, * from the platform code.
.mapping = &cpg_mapping, */
static struct clk plla_clk = {
.rate = 1500000000,
.mapping = &cpg_mapping,
}; };
static struct clk *main_clks[] = { static struct clk *main_clks[] = {
&clkp, &plla_clk,
};
static int divisors[] = { 0, 0, 0, 6, 8, 12, 16, 0, 24, 32, 36, 0, 0, 0, 0, 0 };
static struct clk_div_mult_table div4_div_mult_table = {
.divisors = divisors,
.nr_divisors = ARRAY_SIZE(divisors),
};
static struct clk_div4_table div4_table = {
.div_mult_table = &div4_div_mult_table,
};
enum { DIV4_S, DIV4_OUT, DIV4_S4, DIV4_S3, DIV4_S1, DIV4_P, DIV4_NR };
static struct clk div4_clks[DIV4_NR] = {
[DIV4_S] = SH_CLK_DIV4(&plla_clk, FRQMR, 20,
0x0018, CLK_ENABLE_ON_INIT),
[DIV4_OUT] = SH_CLK_DIV4(&plla_clk, FRQMR, 16,
0x0700, CLK_ENABLE_ON_INIT),
[DIV4_S4] = SH_CLK_DIV4(&plla_clk, FRQMR, 12,
0x0040, CLK_ENABLE_ON_INIT),
[DIV4_S3] = SH_CLK_DIV4(&plla_clk, FRQMR, 8,
0x0010, CLK_ENABLE_ON_INIT),
[DIV4_S1] = SH_CLK_DIV4(&plla_clk, FRQMR, 4,
0x0060, CLK_ENABLE_ON_INIT),
[DIV4_P] = SH_CLK_DIV4(&plla_clk, FRQMR, 0,
0x0300, CLK_ENABLE_ON_INIT),
}; };
enum { MSTP026, MSTP025, MSTP024, MSTP023, MSTP022, MSTP021, enum { MSTP026, MSTP025, MSTP024, MSTP023, MSTP022, MSTP021,
MSTP016, MSTP015, MSTP014, MSTP016, MSTP015, MSTP014,
MSTP_NR }; MSTP_NR };
#define MSTP(_parent, _reg, _bit, _flags) \
SH_CLK_MSTP32(_parent, _reg, _bit, _flags)
static struct clk mstp_clks[MSTP_NR] = { static struct clk mstp_clks[MSTP_NR] = {
[MSTP026] = MSTP(&clkp, MSTPCR0, 26, 0), /* SCIF0 */ [MSTP026] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 26, 0), /* SCIF0 */
[MSTP025] = MSTP(&clkp, MSTPCR0, 25, 0), /* SCIF1 */ [MSTP025] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 25, 0), /* SCIF1 */
[MSTP024] = MSTP(&clkp, MSTPCR0, 24, 0), /* SCIF2 */ [MSTP024] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 24, 0), /* SCIF2 */
[MSTP023] = MSTP(&clkp, MSTPCR0, 23, 0), /* SCIF3 */ [MSTP023] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 23, 0), /* SCIF3 */
[MSTP022] = MSTP(&clkp, MSTPCR0, 22, 0), /* SCIF4 */ [MSTP022] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 22, 0), /* SCIF4 */
[MSTP021] = MSTP(&clkp, MSTPCR0, 21, 0), /* SCIF5 */ [MSTP021] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 21, 0), /* SCIF5 */
[MSTP016] = MSTP(&clkp, MSTPCR0, 16, 0), /* TMU0 */ [MSTP016] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 16, 0), /* TMU0 */
[MSTP015] = MSTP(&clkp, MSTPCR0, 15, 0), /* TMU1 */ [MSTP015] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 15, 0), /* TMU1 */
[MSTP014] = MSTP(&clkp, MSTPCR0, 14, 0), /* TMU2 */ [MSTP014] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 14, 0), /* TMU2 */
}; };
static struct clk_lookup lookups[] = { static struct clk_lookup lookups[] = {
/* main clocks */
CLKDEV_CON_ID("plla_clk", &plla_clk),
/* DIV4 clocks */
CLKDEV_CON_ID("shyway_clk", &div4_clks[DIV4_S]),
CLKDEV_CON_ID("bus_clk", &div4_clks[DIV4_OUT]),
CLKDEV_CON_ID("shyway4_clk", &div4_clks[DIV4_S4]),
CLKDEV_CON_ID("shyway3_clk", &div4_clks[DIV4_S3]),
CLKDEV_CON_ID("shyway1_clk", &div4_clks[DIV4_S1]),
CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]),
/* MSTP32 clocks */ /* MSTP32 clocks */
CLKDEV_DEV_ID("sh_tmu.0", &mstp_clks[MSTP016]), /* TMU00 */ CLKDEV_DEV_ID("sh_tmu.0", &mstp_clks[MSTP016]), /* TMU00 */
CLKDEV_DEV_ID("sh_tmu.1", &mstp_clks[MSTP016]), /* TMU01 */ CLKDEV_DEV_ID("sh_tmu.1", &mstp_clks[MSTP016]), /* TMU01 */
@ -93,6 +132,9 @@ void __init r8a7779_clock_init(void)
for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++) for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
ret = clk_register(main_clks[k]); ret = clk_register(main_clks[k]);
if (!ret)
ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);
if (!ret) if (!ret)
ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR); ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR);