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clock-mx51: factorize clk_set_parent and clk_get_rate 

Signed-off-by: Eric Bénard <eric@eukrea.com>
This commit is contained in:
Eric Bénard 2010-10-11 21:55:24 +02:00 committed by Sascha Hauer
parent c0550c4bf1
commit 0076232d54
1 changed files with 52 additions and 98 deletions
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150
arch/arm/mach-mx5/clock-mx51.c
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@ -544,35 +544,6 @@ static int _clk_ipg_per_set_parent(struct clk *clk, struct clk *parent)
return 0;
}
static unsigned long clk_uart_get_rate(struct clk *clk)
{
u32 reg, prediv, podf;
unsigned long parent_rate;
parent_rate = clk_get_rate(clk->parent);
reg = __raw_readl(MXC_CCM_CSCDR1);
prediv = ((reg & MXC_CCM_CSCDR1_UART_CLK_PRED_MASK) >>
MXC_CCM_CSCDR1_UART_CLK_PRED_OFFSET) + 1;
podf = ((reg & MXC_CCM_CSCDR1_UART_CLK_PODF_MASK) >>
MXC_CCM_CSCDR1_UART_CLK_PODF_OFFSET) + 1;
return parent_rate / (prediv * podf);
}
static int _clk_uart_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_UART_CLK_SEL_MASK;
reg |= mux << MXC_CCM_CSCMR1_UART_CLK_SEL_OFFSET;
__raw_writel(reg, MXC_CCM_CSCMR1);
return 0;
}
#define clk_nfc_set_parent NULL
static unsigned long clk_nfc_get_rate(struct clk *clk)
@ -631,35 +602,6 @@ static int clk_nfc_set_rate(struct clk *clk, unsigned long rate)
return 0;
}
static unsigned long clk_usboh3_get_rate(struct clk *clk)
{
u32 reg, prediv, podf;
unsigned long parent_rate;
parent_rate = clk_get_rate(clk->parent);
reg = __raw_readl(MXC_CCM_CSCDR1);
prediv = ((reg & MXC_CCM_CSCDR1_USBOH3_CLK_PRED_MASK) >>
MXC_CCM_CSCDR1_USBOH3_CLK_PRED_OFFSET) + 1;
podf = ((reg & MXC_CCM_CSCDR1_USBOH3_CLK_PODF_MASK) >>
MXC_CCM_CSCDR1_USBOH3_CLK_PODF_OFFSET) + 1;
return parent_rate / (prediv * podf);
}
static int _clk_usboh3_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_USBOH3_CLK_SEL_MASK;
reg |= mux << MXC_CCM_CSCMR1_USBOH3_CLK_SEL_OFFSET;
__raw_writel(reg, MXC_CCM_CSCMR1);
return 0;
}
static unsigned long get_high_reference_clock_rate(struct clk *clk)
{
return external_high_reference;
@ -786,18 +728,6 @@ static struct clk ipg_perclk = {
.set_parent = _clk_ipg_per_set_parent,
};
static struct clk uart_root_clk = {
.parent = &pll2_sw_clk,
.get_rate = clk_uart_get_rate,
.set_parent = _clk_uart_set_parent,
};
static struct clk usboh3_clk = {
.parent = &pll2_sw_clk,
.get_rate = clk_usboh3_get_rate,
.set_parent = _clk_usboh3_set_parent,
};
static struct clk ahb_max_clk = {
.parent = &ahb_clk,
.enable_reg = MXC_CCM_CCGR0,
@ -857,35 +787,59 @@ static struct clk emi_slow_clk = {
.secondary = s, \
}
#define CLK_GET_RATE(name, nr, bitsname) \
static unsigned long clk_##name##_get_rate(struct clk *clk) \
{ \
u32 reg, pred, podf; \
\
reg = __raw_readl(MXC_CCM_CSCDR##nr); \
pred = (reg & MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PRED_MASK) \
>> MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PRED_OFFSET; \
podf = (reg & MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PODF_MASK) \
>> MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PODF_OFFSET; \
\
return DIV_ROUND_CLOSEST(clk_get_rate(clk->parent), \
(pred + 1) * (podf + 1)); \
}
#define CLK_SET_PARENT(name, nr, bitsname) \
static int clk_##name##_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_CSCMR##nr) & \
~MXC_CCM_CSCMR##nr##_##bitsname##_CLK_SEL_MASK; \
reg |= mux << MXC_CCM_CSCMR##nr##_##bitsname##_CLK_SEL_OFFSET; \
__raw_writel(reg, MXC_CCM_CSCMR##nr); \
\
return 0; \
}
/* UART */
CLK_GET_RATE(uart, 1, UART)
CLK_SET_PARENT(uart, 1, UART)
static struct clk uart_root_clk = {
.parent = &pll2_sw_clk,
.get_rate = clk_uart_get_rate,
.set_parent = clk_uart_set_parent,
};
/* USBOH3 */
CLK_GET_RATE(usboh3, 1, USBOH3)
CLK_SET_PARENT(usboh3, 1, USBOH3)
static struct clk usboh3_clk = {
.parent = &pll2_sw_clk,
.get_rate = clk_usboh3_get_rate,
.set_parent = clk_usboh3_set_parent,
};
/* eCSPI */
static unsigned long clk_ecspi_get_rate(struct clk *clk)
{
u32 reg, pred, podf;
reg = __raw_readl(MXC_CCM_CSCDR2);
pred = (reg & MXC_CCM_CSCDR2_CSPI_CLK_PRED_MASK) >>
MXC_CCM_CSCDR2_CSPI_CLK_PRED_OFFSET;
podf = (reg & MXC_CCM_CSCDR2_CSPI_CLK_PODF_MASK) >>
MXC_CCM_CSCDR2_CSPI_CLK_PODF_OFFSET;
return DIV_ROUND_CLOSEST(clk_get_rate(clk->parent),
(pred + 1) * (podf + 1));
}
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;
}
CLK_GET_RATE(ecspi, 2, CSPI)
CLK_SET_PARENT(ecspi, 1, CSPI)
static struct clk ecspi_main_clk = {
.parent = &pll3_sw_clk,