diff options
author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2010-07-21 10:13:14 +0000 |
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committer | Paul Mundt <lethal@linux-sh.org> | 2010-08-04 16:12:06 +0900 |
commit | b90884c886696a67a4c7832b4e627f341a860b3d (patch) | |
tree | badcea9298541009150fff8abc278980b542ae4c | |
parent | b3dd51a8a6ce2e618e8a1be8fa0e7d3d4733c300 (diff) | |
download | linux-stable-b90884c886696a67a4c7832b4e627f341a860b3d.tar.gz linux-stable-b90884c886696a67a4c7832b4e627f341a860b3d.tar.bz2 linux-stable-b90884c886696a67a4c7832b4e627f341a860b3d.zip |
ARM: mach-shmobile: extend clock definitions on sh7372
Add definitions for DV_CLKI and HDMI clocks, extend support for PLLC2 and some
other clocks.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
-rw-r--r-- | arch/arm/mach-shmobile/clock-sh7372.c | 171 | ||||
-rw-r--r-- | arch/arm/mach-shmobile/include/mach/sh7372.h | 6 |
2 files changed, 172 insertions, 5 deletions
diff --git a/arch/arm/mach-shmobile/clock-sh7372.c b/arch/arm/mach-shmobile/clock-sh7372.c index 26521a737735..a653d12a11a7 100644 --- a/arch/arm/mach-shmobile/clock-sh7372.c +++ b/arch/arm/mach-shmobile/clock-sh7372.c @@ -50,6 +50,10 @@ #define SMSTPCR3 0xe615013c #define SMSTPCR4 0xe6150140 +/* Platforms must set frequency on their DV_CLKI pin */ +struct clk dv_clki_clk = { +}; + /* Fixed 32 KHz root clock from EXTALR pin */ static struct clk r_clk = { .rate = 32768, @@ -81,6 +85,12 @@ static struct clk_ops div2_clk_ops = { .recalc = div2_recalc, }; +/* Divide dv_clki by two */ +struct clk dv_clki_div2_clk = { + .ops = &div2_clk_ops, + .parent = &dv_clki_clk, +}; + /* Divide extal1 by two */ static struct clk extal1_div2_clk = { .ops = &div2_clk_ops, @@ -135,30 +145,160 @@ static struct clk pllc1_div2_clk = { }; /* PLLC2 */ + +/* Indices are important - they are the actual src selecting values */ +static struct clk *pllc2_parent[] = { + [0] = &extal1_div2_clk, + [1] = &extal2_div2_clk, + [2] = &dv_clki_div2_clk, +}; + +/* Only multipliers 20 * 2 to 46 * 2 are valid, last entry for CPUFREQ_TABLE_END */ +static struct cpufreq_frequency_table pllc2_freq_table[29]; + +static void pllc2_table_rebuild(struct clk *clk) +{ + int i; + + /* Initialise PLLC2 frequency table */ + for (i = 0; i < ARRAY_SIZE(pllc2_freq_table) - 2; i++) { + pllc2_freq_table[i].frequency = clk->parent->rate * (i + 20) * 2; + pllc2_freq_table[i].index = i; + } + + /* This is a special entry - switching PLL off makes it a repeater */ + pllc2_freq_table[i].frequency = clk->parent->rate; + pllc2_freq_table[i].index = i; + + pllc2_freq_table[++i].frequency = CPUFREQ_TABLE_END; + pllc2_freq_table[i].index = i; +} + static unsigned long pllc2_recalc(struct clk *clk) { unsigned long mult = 1; + pllc2_table_rebuild(clk); + + /* + * If the PLL is off, mult == 1, clk->rate will be updated in + * pllc2_enable(). + */ if (__raw_readl(PLLC2CR) & (1 << 31)) mult = (((__raw_readl(PLLC2CR) >> 24) & 0x3f) + 1) * 2; return clk->parent->rate * mult; } +static long pllc2_round_rate(struct clk *clk, unsigned long rate) +{ + return clk_rate_table_round(clk, clk->freq_table, rate); +} + +static int pllc2_enable(struct clk *clk) +{ + int i; + + __raw_writel(__raw_readl(PLLC2CR) | 0x80000000, PLLC2CR); + + for (i = 0; i < 100; i++) + if (__raw_readl(PLLC2CR) & 0x80000000) { + clk->rate = pllc2_recalc(clk); + return 0; + } + + pr_err("%s(): timeout!\n", __func__); + + return -ETIMEDOUT; +} + +static void pllc2_disable(struct clk *clk) +{ + __raw_writel(__raw_readl(PLLC2CR) & ~0x80000000, PLLC2CR); +} + +static int pllc2_set_rate(struct clk *clk, + unsigned long rate, int algo_id) +{ + unsigned long value; + int idx; + + idx = clk_rate_table_find(clk, clk->freq_table, rate); + if (idx < 0) + return idx; + + if (rate == clk->parent->rate) { + pllc2_disable(clk); + return 0; + } + + value = __raw_readl(PLLC2CR) & ~(0x3f << 24); + + if (value & 0x80000000) + pllc2_disable(clk); + + __raw_writel((value & ~0x80000000) | ((idx + 19) << 24), PLLC2CR); + + if (value & 0x80000000) + return pllc2_enable(clk); + + return 0; +} + +static int pllc2_set_parent(struct clk *clk, struct clk *parent) +{ + u32 value; + int ret, i; + + 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; + + value = __raw_readl(PLLC2CR) & ~(3 << 6); + + __raw_writel(value | (i << 6), PLLC2CR); + + /* Rebiuld the frequency table */ + pllc2_table_rebuild(clk); + + return 0; +} + static struct clk_ops pllc2_clk_ops = { .recalc = pllc2_recalc, + .round_rate = pllc2_round_rate, + .set_rate = pllc2_set_rate, + .enable = pllc2_enable, + .disable = pllc2_disable, + .set_parent = pllc2_set_parent, }; -static struct clk pllc2_clk = { +struct clk pllc2_clk = { .ops = &pllc2_clk_ops, .flags = CLK_ENABLE_ON_INIT, .parent = &extal1_div2_clk, + .freq_table = pllc2_freq_table, + .parent_table = pllc2_parent, + .parent_num = ARRAY_SIZE(pllc2_parent), }; static struct clk *main_clks[] = { + &dv_clki_clk, &r_clk, &sh7372_extal1_clk, &sh7372_extal2_clk, + &dv_clki_div2_clk, &extal1_div2_clk, &extal2_div2_clk, &extal2_div4_clk, @@ -219,7 +359,7 @@ static struct clk div4_clks[DIV4_NR] = { enum { DIV6_VCK1, DIV6_VCK2, DIV6_VCK3, DIV6_FMSI, DIV6_FMSO, DIV6_FSIA, DIV6_FSIB, DIV6_SUB, DIV6_SPU, - DIV6_VOU, DIV6_HDMI, DIV6_DSIT, DIV6_DSI0P, DIV6_DSI1P, + DIV6_VOU, DIV6_DSIT, DIV6_DSI0P, DIV6_DSI1P, DIV6_NR }; static struct clk div6_clks[DIV6_NR] = { @@ -233,12 +373,26 @@ static struct clk div6_clks[DIV6_NR] = { [DIV6_SUB] = SH_CLK_DIV6(&sh7372_extal2_clk, SUBCKCR, 0), [DIV6_SPU] = SH_CLK_DIV6(&pllc1_div2_clk, SPUCKCR, 0), [DIV6_VOU] = SH_CLK_DIV6(&pllc1_div2_clk, VOUCKCR, 0), - [DIV6_HDMI] = SH_CLK_DIV6(&pllc1_div2_clk, HDMICKCR, 0), [DIV6_DSIT] = SH_CLK_DIV6(&pllc1_div2_clk, DSITCKCR, 0), [DIV6_DSI0P] = SH_CLK_DIV6(&pllc1_div2_clk, DSI0PCKCR, 0), [DIV6_DSI1P] = SH_CLK_DIV6(&pllc1_div2_clk, DSI1PCKCR, 0), }; +enum { DIV6_HDMI, DIV6_REPARENT_NR }; + +/* Indices are important - they are the actual src selecting values */ +static struct clk *hdmi_parent[] = { + [0] = &pllc1_div2_clk, + [1] = &pllc2_clk, + [2] = &dv_clki_clk, + [3] = NULL, /* pllc2_div4 not implemented yet */ +}; + +static struct clk div6_reparent_clks[DIV6_REPARENT_NR] = { + [DIV6_HDMI] = SH_CLK_DIV6_EXT(&pllc1_div2_clk, HDMICKCR, 0, + hdmi_parent, ARRAY_SIZE(hdmi_parent), 6, 2), +}; + enum { MSTP001, MSTP131, MSTP130, MSTP129, MSTP128, @@ -247,7 +401,7 @@ enum { MSTP001, MSTP223, MSTP207, MSTP206, MSTP204, MSTP203, MSTP202, MSTP201, MSTP200, MSTP329, MSTP328, MSTP323, MSTP322, MSTP314, MSTP313, MSTP312, - MSTP415, MSTP410, MSTP411, MSTP406, MSTP403, + MSTP415, MSTP413, MSTP411, MSTP410, MSTP406, MSTP403, MSTP_NR }; #define MSTP(_parent, _reg, _bit, _flags) \ @@ -281,6 +435,7 @@ static struct clk mstp_clks[MSTP_NR] = { [MSTP313] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 13, 0), /* SDHI1 */ [MSTP312] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 12, 0), /* MMC */ [MSTP415] = MSTP(&div4_clks[DIV4_HP], SMSTPCR4, 15, 0), /* SDHI2 */ + [MSTP413] = MSTP(&pllc1_div2_clk, SMSTPCR4, 13, 0), /* HDMI */ [MSTP411] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR4, 11, 0), /* IIC3 */ [MSTP410] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR4, 10, 0), /* IIC4 */ [MSTP406] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR4, 6, 0), /* USB1 */ @@ -292,6 +447,7 @@ static struct clk mstp_clks[MSTP_NR] = { static struct clk_lookup lookups[] = { /* main clocks */ + CLKDEV_CON_ID("dv_clki_div2_clk", &dv_clki_div2_clk), CLKDEV_CON_ID("r_clk", &r_clk), CLKDEV_CON_ID("extal1", &sh7372_extal1_clk), CLKDEV_CON_ID("extal2", &sh7372_extal2_clk), @@ -331,7 +487,7 @@ static struct clk_lookup lookups[] = { CLKDEV_CON_ID("sub_clk", &div6_clks[DIV6_SUB]), CLKDEV_CON_ID("spu_clk", &div6_clks[DIV6_SPU]), CLKDEV_CON_ID("vou_clk", &div6_clks[DIV6_VOU]), - CLKDEV_CON_ID("hdmi_clk", &div6_clks[DIV6_HDMI]), + CLKDEV_CON_ID("hdmi_clk", &div6_reparent_clks[DIV6_HDMI]), CLKDEV_CON_ID("dsit_clk", &div6_clks[DIV6_DSIT]), CLKDEV_CON_ID("dsi0p_clk", &div6_clks[DIV6_DSI0P]), CLKDEV_CON_ID("dsi1p_clk", &div6_clks[DIV6_DSI1P]), @@ -366,11 +522,13 @@ static struct clk_lookup lookups[] = { CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[MSTP313]), /* SDHI1 */ CLKDEV_DEV_ID("sh_mmcif.0", &mstp_clks[MSTP312]), /* MMC */ CLKDEV_DEV_ID("sh_mobile_sdhi.2", &mstp_clks[MSTP415]), /* SDHI2 */ + CLKDEV_DEV_ID("sh-mobile-hdmi", &mstp_clks[MSTP413]), /* HDMI */ CLKDEV_DEV_ID("i2c-sh_mobile.3", &mstp_clks[MSTP411]), /* IIC3 */ CLKDEV_DEV_ID("i2c-sh_mobile.4", &mstp_clks[MSTP410]), /* IIC4 */ CLKDEV_DEV_ID("r8a66597_hcd.1", &mstp_clks[MSTP406]), /* USB1 */ CLKDEV_DEV_ID("r8a66597_udc.1", &mstp_clks[MSTP406]), /* USB1 */ CLKDEV_DEV_ID("sh_keysc.0", &mstp_clks[MSTP403]), /* KEYSC */ + {.con_id = "ick", .dev_id = "sh-mobile-hdmi", .clk = &div6_reparent_clks[DIV6_HDMI]}, }; void __init sh7372_clock_init(void) @@ -387,6 +545,9 @@ void __init sh7372_clock_init(void) ret = sh_clk_div6_register(div6_clks, DIV6_NR); if (!ret) + ret = sh_clk_div6_reparent_register(div6_reparent_clks, DIV6_NR); + + if (!ret) ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR); clkdev_add_table(lookups, ARRAY_SIZE(lookups)); diff --git a/arch/arm/mach-shmobile/include/mach/sh7372.h b/arch/arm/mach-shmobile/include/mach/sh7372.h index c2d2d811059c..33e9700ded7e 100644 --- a/arch/arm/mach-shmobile/include/mach/sh7372.h +++ b/arch/arm/mach-shmobile/include/mach/sh7372.h @@ -11,6 +11,8 @@ #ifndef __ASM_SH7372_H__ #define __ASM_SH7372_H__ +#include <linux/sh_clk.h> + /* * Pin Function Controller: * GPIO_FN_xx - GPIO used to select pin function @@ -455,4 +457,8 @@ enum { SHDMA_SLAVE_SDHI2_TX, }; +extern struct clk dv_clki_clk; +extern struct clk dv_clki_div2_clk; +extern struct clk pllc2_clk; + #endif /* __ASM_SH7372_H__ */ |