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clk: agilex: Additional membus writes for HPS PLL

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Add additional membus writes to configure main and peripheral PLL
for Agilex's clock manager.

Signed-off-by: Chee Hong Ang <chee.hong.ang@intel.com>
Reviewed-by: Ley Foon Tan <ley.foon.tan@intel.com>
This commit is contained in:
Chee Hong Ang
2020-07-10 20:55:23 +08:00
committed by Ley Foon Tan
parent 35d847ed90
commit d24f2bc148
1 changed files with 78 additions and 16 deletions
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94
drivers/clk/altera/clk-agilex.c
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@@ -47,8 +47,66 @@ static void clk_write_ctrl(struct socfpga_clk_platdata *plat, u32 val)
#define MEMBUS_MAINPLL 0
#define MEMBUS_PERPLL 1
#define MEMBUS_TIMEOUT 1000
#define MEMBUS_ADDR_CLKSLICE 0x27
#define MEMBUS_CLKSLICE_SYNC_MODE_EN 0x80
#define MEMBUS_CLKSLICE_REG 0x27
#define MEMBUS_SYNTHCALFOSC_INIT_CENTERFREQ_REG 0xb3
#define MEMBUS_SYNTHPPM_WATCHDOGTMR_VF01_REG 0xe6
#define MEMBUS_CALCLKSLICE0_DUTY_LOCOVR_REG 0x03
#define MEMBUS_CALCLKSLICE1_DUTY_LOCOVR_REG 0x07
static const struct {
u32 reg;
u32 val;
u32 mask;
} membus_pll[] = {
{
MEMBUS_CLKSLICE_REG,
/*
* BIT[7:7]
* Enable source synchronous mode
*/
BIT(7),
BIT(7)
},
{
MEMBUS_SYNTHCALFOSC_INIT_CENTERFREQ_REG,
/*
* BIT[0:0]
* Sets synthcalfosc_init_centerfreq=1 to limit overshoot
* frequency during lock
*/
BIT(0),
BIT(0)
},
{
MEMBUS_SYNTHPPM_WATCHDOGTMR_VF01_REG,
/*
* BIT[0:0]
* Sets synthppm_watchdogtmr_vf0=1 to give the pll more time
* to settle before lock is asserted.
*/
BIT(0),
BIT(0)
},
{
MEMBUS_CALCLKSLICE0_DUTY_LOCOVR_REG,
/*
* BIT[6:0]
* Centering duty cycle for clkslice0 output
*/
0x4a,
GENMASK(6, 0)
},
{
MEMBUS_CALCLKSLICE1_DUTY_LOCOVR_REG,
/*
* BIT[6:0]
* Centering duty cycle for clkslice1 output
*/
0x4a,
GENMASK(6, 0)
},
};
static int membus_wait_for_req(struct socfpga_clk_platdata *plat, u32 pll,
int timeout)
@@ -126,6 +184,20 @@ static int membus_read_pll(struct socfpga_clk_platdata *plat, u32 pll,
return 0;
}
static void membus_pll_configs(struct socfpga_clk_platdata *plat, u32 pll)
{
int i;
u32 rdata;
for (i = 0; i < ARRAY_SIZE(membus_pll); i++) {
membus_read_pll(plat, pll, membus_pll[i].reg,
&rdata, MEMBUS_TIMEOUT);
membus_write_pll(plat, pll, membus_pll[i].reg,
((rdata & ~membus_pll[i].mask) | membus_pll[i].val),
MEMBUS_TIMEOUT);
}
}
static u32 calc_vocalib_pll(u32 pllm, u32 pllglob)
{
u32 mdiv, refclkdiv, arefclkdiv, drefclkdiv, mscnt, hscnt, vcocalib;
@@ -166,7 +238,6 @@ static void clk_basic_init(struct udevice *dev,
{
struct socfpga_clk_platdata *plat = dev_get_platdata(dev);
u32 vcocalib;
u32 rdata;
if (!cfg)
return;
@@ -226,19 +297,10 @@ static void clk_basic_init(struct udevice *dev,
CM_REG_SETBITS(plat, CLKMGR_PERPLL_PLLGLOB,
CLKMGR_PLLGLOB_PD_MASK | CLKMGR_PLLGLOB_RST_MASK);
/* Membus programming to set mainpll and perripll to
* source synchronous mode
*/
membus_read_pll(plat, MEMBUS_MAINPLL, MEMBUS_ADDR_CLKSLICE, &rdata,
MEMBUS_TIMEOUT);
membus_write_pll(plat, MEMBUS_MAINPLL, MEMBUS_ADDR_CLKSLICE,
(rdata | MEMBUS_CLKSLICE_SYNC_MODE_EN),
MEMBUS_TIMEOUT);
membus_read_pll(plat, MEMBUS_PERPLL, MEMBUS_ADDR_CLKSLICE, &rdata,
MEMBUS_TIMEOUT);
membus_write_pll(plat, MEMBUS_PERPLL, MEMBUS_ADDR_CLKSLICE,
(rdata | MEMBUS_CLKSLICE_SYNC_MODE_EN),
MEMBUS_TIMEOUT);
/* Membus programming for mainpll */
membus_pll_configs(plat, MEMBUS_MAINPLL);
/* Membus programming for peripll */
membus_pll_configs(plat, MEMBUS_PERPLL);
cm_wait_for_lock(CLKMGR_STAT_ALLPLL_LOCKED_MASK);