[PATCH 2/6] i.MX5/clock: add eCSPI and CSPI clock definitions
Jason Wang
jason77.wang at gmail.com
Thu Sep 2 03:52:00 EDT 2010
i.MX51 has two eCSPI and one CSPI controllers, now add clock
definitions and registrations for these controllers.
Signed-off-by: Jason Wang <jason77.wang at gmail.com>
---
arch/arm/mach-mx5/clock-mx51.c | 79 ++++++++++++++++++++++++++++++++++++++++
1 files changed, 79 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-mx5/clock-mx51.c b/arch/arm/mach-mx5/clock-mx51.c
index 6af69de..217c3f3 100644
--- a/arch/arm/mach-mx5/clock-mx51.c
+++ b/arch/arm/mach-mx5/clock-mx51.c
@@ -38,6 +38,7 @@ static struct clk periph_apm_clk;
static struct clk ahb_clk;
static struct clk ipg_clk;
static struct clk usboh3_clk;
+static struct clk spba_clk;
#define MAX_DPLL_WAIT_TRIES 1000 /* 1000 * udelay(1) = 1ms */
@@ -52,6 +53,18 @@ static int _clk_ccgr_enable(struct clk *clk)
return 0;
}
+static int _clk_ccgr_enable_inrun(struct clk *clk)
+{
+ u32 reg;
+
+ reg = __raw_readl(clk->enable_reg);
+ reg &= ~(MXC_CCM_CCGRx_CG_MASK << clk->enable_shift);
+ reg |= MXC_CCM_CCGRx_MOD_IDLE << clk->enable_shift;
+ __raw_writel(reg, clk->enable_reg);
+
+ return 0;
+}
+
static void _clk_ccgr_disable(struct clk *clk)
{
u32 reg;
@@ -762,6 +775,61 @@ static struct clk kpp_clk = {
.id = 0,
};
+/* eCSPI */
+static unsigned long _clk_ecspi_getrate(struct clk *clk)
+{
+ u32 reg, prediv, podf;
+ unsigned long ret;
+
+ reg = __raw_readl(MXC_CCM_CSCDR2);
+ prediv = ((reg & MXC_CCM_CSCDR2_CSPI_CLK_PRED_MASK) >>
+ MXC_CCM_CSCDR2_CSPI_CLK_PRED_OFFSET) + 1;
+ if (prediv == 1)
+ BUG();
+ podf = ((reg & MXC_CCM_CSCDR2_CSPI_CLK_PODF_MASK) >>
+ MXC_CCM_CSCDR2_CSPI_CLK_PODF_OFFSET) + 1;
+
+ ret = clk_get_rate(clk->parent) / (prediv * podf);
+ return ret;
+}
+
+static int _clk_ecspi_set_parent(struct clk *clk, struct clk *parent)
+{
+ u32 reg, mux;
+
+ mux = _get_mux(parent, &pll1_sw_clk, &pll2_sw_clk, &pll3_sw_clk,
+ &lp_apm_clk);
+ reg = __raw_readl(MXC_CCM_CSCMR1) & ~MXC_CCM_CSCMR1_CSPI_CLK_SEL_MASK;
+ reg |= mux << MXC_CCM_CSCMR1_CSPI_CLK_SEL_OFFSET;
+ __raw_writel(reg, MXC_CCM_CSCMR1);
+
+ return 0;
+}
+
+static struct clk ecspi_main_clk = {
+ .parent = &pll3_sw_clk,
+ .get_rate = _clk_ecspi_getrate,
+ .set_parent = _clk_ecspi_set_parent,
+};
+
+static struct clk ecspi1_ipg_clk = {
+ .parent = &ipg_clk,
+ .secondary = &spba_clk,
+ .enable_reg = MXC_CCM_CCGR4,
+ .enable_shift = MXC_CCM_CCGRx_CG9_OFFSET,
+ .enable = _clk_ccgr_enable_inrun,
+ .disable = _clk_ccgr_disable,
+};
+
+static struct clk ecspi2_ipg_clk = {
+ .parent = &ipg_clk,
+ .secondary = &aips_tz2_clk,
+ .enable_reg = MXC_CCM_CCGR4,
+ .enable_shift = MXC_CCM_CCGRx_CG11_OFFSET,
+ .enable = _clk_ccgr_enable_inrun,
+ .disable = _clk_ccgr_disable,
+};
+
#define DEFINE_CLOCK(name, i, er, es, gr, sr, p, s) \
static struct clk name = { \
.id = i, \
@@ -814,6 +882,14 @@ DEFINE_CLOCK(hsi2c_clk, 0, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG11_OFFSET,
DEFINE_CLOCK(fec_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG12_OFFSET,
NULL, NULL, &ipg_clk, NULL);
+/* eCSPI & CSPI */
+DEFINE_CLOCK(cspi1_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG10_OFFSET,
+ NULL, NULL, &ecspi_main_clk, &ecspi1_ipg_clk);
+DEFINE_CLOCK(cspi2_clk, 1, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG12_OFFSET,
+ NULL, NULL, &ecspi_main_clk, &ecspi2_ipg_clk);
+DEFINE_CLOCK(cspi3_clk, 2, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG13_OFFSET,
+ NULL, NULL, &ipg_clk, NULL);
+
#define _REGISTER_CLOCK(d, n, c) \
{ \
.dev_id = d, \
@@ -837,6 +913,9 @@ static struct clk_lookup lookups[] = {
_REGISTER_CLOCK("fsl-usb2-udc", "usb", usboh3_clk)
_REGISTER_CLOCK("fsl-usb2-udc", "usb_ahb", ahb_clk)
_REGISTER_CLOCK("imx-keypad.0", NULL, kpp_clk)
+ _REGISTER_CLOCK("spi_imx.0", NULL, cspi1_clk)
+ _REGISTER_CLOCK("spi_imx.1", NULL, cspi2_clk)
+ _REGISTER_CLOCK("spi_imx.2", NULL, cspi3_clk)
};
static void clk_tree_init(void)
--
1.5.6.5
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