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ARM: mx5: Add Nand clock support

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Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2010-08-03 11:59:07 +02:00
parent f781bc8aa4
commit 2b82e64d78
1 changed files with 98 additions and 0 deletions
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98
arch/arm/mach-mx5/clock-mx51.c
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@ -573,6 +573,64 @@ static int _clk_uart_set_parent(struct clk *clk, struct clk *parent)
return 0;
}
#define clk_nfc_set_parent NULL
static unsigned long clk_nfc_get_rate(struct clk *clk)
{
unsigned long rate;
u32 reg, div;
reg = __raw_readl(MXC_CCM_CBCDR);
div = ((reg & MXC_CCM_CBCDR_NFC_PODF_MASK) >>
MXC_CCM_CBCDR_NFC_PODF_OFFSET) + 1;
rate = clk_get_rate(clk->parent) / div;
WARN_ON(rate == 0);
return rate;
}
static unsigned long clk_nfc_round_rate(struct clk *clk,
unsigned long rate)
{
u32 div;
unsigned long parent_rate = clk_get_rate(clk->parent);
if (!rate)
return -EINVAL;
div = parent_rate / rate;
if (parent_rate % rate)
div++;
if (div > 8)
return -EINVAL;
return parent_rate / div;
}
static int clk_nfc_set_rate(struct clk *clk, unsigned long rate)
{
u32 reg, div;
div = clk_get_rate(clk->parent) / rate;
if (div == 0)
div++;
if (((clk_get_rate(clk->parent) / div) != rate) || (div > 8))
return -EINVAL;
reg = __raw_readl(MXC_CCM_CBCDR);
reg &= ~MXC_CCM_CBCDR_NFC_PODF_MASK;
reg |= (div - 1) << MXC_CCM_CBCDR_NFC_PODF_OFFSET;
__raw_writel(reg, MXC_CCM_CBCDR);
while (__raw_readl(MXC_CCM_CDHIPR) &
MXC_CCM_CDHIPR_NFC_IPG_INT_MEM_PODF_BUSY){
}
return 0;
}
static unsigned long clk_usboh3_get_rate(struct clk *clk)
{
u32 reg, prediv, podf;
@ -622,6 +680,17 @@ static unsigned long get_ckih2_reference_clock_rate(struct clk *clk)
return ckih2_reference;
}
static unsigned long clk_emi_slow_get_rate(struct clk *clk)
{
u32 reg, div;
reg = __raw_readl(MXC_CCM_CBCDR);
div = ((reg & MXC_CCM_CBCDR_EMI_PODF_MASK) >>
MXC_CCM_CBCDR_EMI_PODF_OFFSET) + 1;
return clk_get_rate(clk->parent) / div;
}
/* External high frequency clock */
static struct clk ckih_clk = {
.get_rate = get_high_reference_clock_rate,
@ -764,6 +833,30 @@ static struct clk kpp_clk = {
.id = 0,
};
static struct clk emi_slow_clk = {
.parent = &pll2_sw_clk,
.enable_reg = MXC_CCM_CCGR5,
.enable_shift = MXC_CCM_CCGRx_CG8_OFFSET,
.enable = _clk_ccgr_enable,
.disable = _clk_ccgr_disable_inwait,
.get_rate = clk_emi_slow_get_rate,
};
#define DEFINE_CLOCK1(name, i, er, es, pfx, p, s) \
static struct clk name = { \
.id = i, \
.enable_reg = er, \
.enable_shift = es, \
.get_rate = pfx##_get_rate, \
.set_rate = pfx##_set_rate, \
.round_rate = pfx##_round_rate, \
.set_parent = pfx##_set_parent, \
.enable = _clk_ccgr_enable, \
.disable = _clk_ccgr_disable, \
.parent = p, \
.secondary = s, \
}
/* eCSPI */
static unsigned long clk_ecspi_get_rate(struct clk *clk)
{
@ -852,6 +945,10 @@ 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);
/* NFC */
DEFINE_CLOCK1(nfc_clk, 0, MXC_CCM_CCGR5, MXC_CCM_CCGRx_CG10_OFFSET,
clk_nfc, &emi_slow_clk, NULL);
/* eCSPI */
DEFINE_CLOCK_FULL(ecspi1_ipg_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG9_OFFSET,
NULL, NULL, _clk_ccgr_enable_inrun, _clk_ccgr_disable,
@ -893,6 +990,7 @@ 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("mxc_nand", NULL, nfc_clk)
_REGISTER_CLOCK("imx51-ecspi.0", NULL, ecspi1_clk)
_REGISTER_CLOCK("imx51-ecspi.1", NULL, ecspi2_clk)
_REGISTER_CLOCK("imx51-cspi.0", NULL, cspi_clk)