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author | Sascha Hauer <s.hauer@pengutronix.de> | 2010-12-06 09:13:21 +0100 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2011-01-03 16:30:56 +0100 |
commit | b848169b37f71c494ea59b260ba665290c23c350 (patch) | |
tree | f12c9815603bb94af5e5b08df3ea8244319f55b0 /arch/arm/mach-mx5/clock-mx51-mx53.c | |
parent | c67a3e09a5316bb34a14e2751cee719339934235 (diff) | |
download | op-kernel-dev-b848169b37f71c494ea59b260ba665290c23c350.zip op-kernel-dev-b848169b37f71c494ea59b260ba665290c23c350.tar.gz |
ARM i.MX51: Add ipu clock support
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/mach-mx5/clock-mx51-mx53.c')
-rw-r--r-- | arch/arm/mach-mx5/clock-mx51-mx53.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/arch/arm/mach-mx5/clock-mx51-mx53.c b/arch/arm/mach-mx5/clock-mx51-mx53.c index 2f9eae2..ba9432c 100644 --- a/arch/arm/mach-mx5/clock-mx51-mx53.c +++ b/arch/arm/mach-mx5/clock-mx51-mx53.c @@ -39,6 +39,9 @@ static struct clk periph_apm_clk; static struct clk ahb_clk; static struct clk ipg_clk; static struct clk usboh3_clk; +static struct clk emi_fast_clk; +static struct clk ipu_clk; +static struct clk mipi_hsc1_clk; #define MAX_DPLL_WAIT_TRIES 1000 /* 1000 * udelay(1) = 1ms */ @@ -688,6 +691,19 @@ static unsigned long clk_emi_slow_get_rate(struct clk *clk) return clk_get_rate(clk->parent) / div; } +static unsigned long _clk_ddr_hf_get_rate(struct clk *clk) +{ + unsigned long rate; + u32 reg, div; + + reg = __raw_readl(MXC_CCM_CBCDR); + div = ((reg & MXC_CCM_CBCDR_DDR_PODF_MASK) >> + MXC_CCM_CBCDR_DDR_PODF_OFFSET) + 1; + rate = clk_get_rate(clk->parent) / div; + + return rate; +} + /* External high frequency clock */ static struct clk ckih_clk = { .get_rate = get_high_reference_clock_rate, @@ -846,6 +862,109 @@ static struct clk emi_slow_clk = { .get_rate = clk_emi_slow_get_rate, }; +static int clk_ipu_enable(struct clk *clk) +{ + u32 reg; + + _clk_ccgr_enable(clk); + + /* Enable handshake with IPU when certain clock rates are changed */ + reg = __raw_readl(MXC_CCM_CCDR); + reg &= ~MXC_CCM_CCDR_IPU_HS_MASK; + __raw_writel(reg, MXC_CCM_CCDR); + + /* Enable handshake with IPU when LPM is entered */ + reg = __raw_readl(MXC_CCM_CLPCR); + reg &= ~MXC_CCM_CLPCR_BYPASS_IPU_LPM_HS; + __raw_writel(reg, MXC_CCM_CLPCR); + + return 0; +} + +static void clk_ipu_disable(struct clk *clk) +{ + u32 reg; + + _clk_ccgr_disable(clk); + + /* Disable handshake with IPU whe dividers are changed */ + reg = __raw_readl(MXC_CCM_CCDR); + reg |= MXC_CCM_CCDR_IPU_HS_MASK; + __raw_writel(reg, MXC_CCM_CCDR); + + /* Disable handshake with IPU when LPM is entered */ + reg = __raw_readl(MXC_CCM_CLPCR); + reg |= MXC_CCM_CLPCR_BYPASS_IPU_LPM_HS; + __raw_writel(reg, MXC_CCM_CLPCR); +} + +static struct clk ahbmux1_clk = { + .parent = &ahb_clk, + .secondary = &ahb_max_clk, + .enable_reg = MXC_CCM_CCGR0, + .enable_shift = MXC_CCM_CCGRx_CG8_OFFSET, + .enable = _clk_ccgr_enable, + .disable = _clk_ccgr_disable_inwait, +}; + +static struct clk ipu_sec_clk = { + .parent = &emi_fast_clk, + .secondary = &ahbmux1_clk, +}; + +static struct clk ddr_hf_clk = { + .parent = &pll1_sw_clk, + .get_rate = _clk_ddr_hf_get_rate, +}; + +static struct clk ddr_clk = { + .parent = &ddr_hf_clk, +}; + +/* clock definitions for MIPI HSC unit which has been removed + * from documentation, but not from hardware + */ +static int _clk_hsc_enable(struct clk *clk) +{ + u32 reg; + + _clk_ccgr_enable(clk); + /* Handshake with IPU when certain clock rates are changed. */ + reg = __raw_readl(MXC_CCM_CCDR); + reg &= ~MXC_CCM_CCDR_HSC_HS_MASK; + __raw_writel(reg, MXC_CCM_CCDR); + + reg = __raw_readl(MXC_CCM_CLPCR); + reg &= ~MXC_CCM_CLPCR_BYPASS_HSC_LPM_HS; + __raw_writel(reg, MXC_CCM_CLPCR); + + return 0; +} + +static void _clk_hsc_disable(struct clk *clk) +{ + u32 reg; + + _clk_ccgr_disable(clk); + /* No handshake with HSC as its not enabled. */ + reg = __raw_readl(MXC_CCM_CCDR); + reg |= MXC_CCM_CCDR_HSC_HS_MASK; + __raw_writel(reg, MXC_CCM_CCDR); + + reg = __raw_readl(MXC_CCM_CLPCR); + reg |= MXC_CCM_CLPCR_BYPASS_HSC_LPM_HS; + __raw_writel(reg, MXC_CCM_CLPCR); +} + +static struct clk mipi_hsp_clk = { + .parent = &ipu_clk, + .enable_reg = MXC_CCM_CCGR4, + .enable_shift = MXC_CCM_CCGRx_CG6_OFFSET, + .enable = _clk_hsc_enable, + .disable = _clk_hsc_disable, + .secondary = &mipi_hsc1_clk, +}; + #define DEFINE_CLOCK_CCGR(name, i, er, es, pfx, p, s) \ static struct clk name = { \ .id = i, \ @@ -1112,6 +1231,23 @@ DEFINE_CLOCK_FULL(esdhc2_ipg_clk, 1, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG2_OFFSET, DEFINE_CLOCK_MAX(esdhc2_clk, 1, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG3_OFFSET, clk_esdhc2, &pll2_sw_clk, &esdhc2_ipg_clk); +DEFINE_CLOCK(mipi_esc_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG5_OFFSET, NULL, NULL, NULL, &pll2_sw_clk); +DEFINE_CLOCK(mipi_hsc2_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG4_OFFSET, NULL, NULL, &mipi_esc_clk, &pll2_sw_clk); +DEFINE_CLOCK(mipi_hsc1_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG3_OFFSET, NULL, NULL, &mipi_hsc2_clk, &pll2_sw_clk); + +/* IPU */ +DEFINE_CLOCK_FULL(ipu_clk, 0, MXC_CCM_CCGR5, MXC_CCM_CCGRx_CG5_OFFSET, + NULL, NULL, clk_ipu_enable, clk_ipu_disable, &ahb_clk, &ipu_sec_clk); + +DEFINE_CLOCK_FULL(emi_fast_clk, 0, MXC_CCM_CCGR5, MXC_CCM_CCGRx_CG7_OFFSET, + NULL, NULL, _clk_ccgr_enable, _clk_ccgr_disable_inwait, + &ddr_clk, NULL); + +DEFINE_CLOCK(ipu_di0_clk, 0, MXC_CCM_CCGR6, MXC_CCM_CCGRx_CG5_OFFSET, + NULL, NULL, &pll3_sw_clk, NULL); +DEFINE_CLOCK(ipu_di1_clk, 0, MXC_CCM_CCGR6, MXC_CCM_CCGRx_CG6_OFFSET, + NULL, NULL, &pll3_sw_clk, NULL); + #define _REGISTER_CLOCK(d, n, c) \ { \ .dev_id = d, \ @@ -1155,6 +1291,10 @@ static struct clk_lookup mx51_lookups[] = { _REGISTER_CLOCK(NULL, "iim_clk", iim_clk) _REGISTER_CLOCK("imx2-wdt.0", NULL, dummy_clk) _REGISTER_CLOCK("imx2-wdt.1", NULL, dummy_clk) + _REGISTER_CLOCK(NULL, "mipi_hsp", mipi_hsp_clk) + _REGISTER_CLOCK("imx-ipuv3", NULL, ipu_clk) + _REGISTER_CLOCK("imx-ipuv3", "di0", ipu_di0_clk) + _REGISTER_CLOCK("imx-ipuv3", "di1", ipu_di1_clk) }; static struct clk_lookup mx53_lookups[] = { |