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Message-Id: <1292842127-21406-2-git-send-email-s.hauer@pengutronix.de>
Date: Mon, 20 Dec 2010 11:48:39 +0100
From: Sascha Hauer <s.hauer@...gutronix.de>
To: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org, Samuel Ortiz <sameo@...ux.intel.com>,
liu.y.victor@...il.com, B02280@...escale.com,
Sascha Hauer <s.hauer@...gutronix.de>
Subject: [PATCH 1/9] ARM i.MX51: Add ipu clock support
Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
---
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 9fc65bb..f550d02 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, \
@@ -1077,6 +1196,23 @@ 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, \
@@ -1117,6 +1253,10 @@ 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[] = {
--
1.7.2.3
--
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