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clk: rockchip: rk3568: support ebc clk setting/getting rate 

Change-Id: Iecac8e56b2b5615b54c8969767053b6282fe6fb8
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
This commit is contained in:
Elaine Zhang 2020-11-12 17:03:13 +08:00 committed by Jianhong Chen
parent d181efcb77
commit fdd74c3220
3 changed files with 64 additions and 0 deletions
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11
arch/arm/include/asm/arch-rockchip/cru_rk3568.h
View File

@ -349,6 +349,13 @@ enum {
DCLK2_VOP_DIV_SHIFT = 0,
DCLK2_VOP_DIV_MASK = 0xff << DCLK2_VOP_DIV_SHIFT,
/* CRU_CLK_SEL43_CON */
DCLK_EBC_SEL_SHIFT = 6,
DCLK_EBC_SEL_MASK = 3 << DCLK_EBC_SEL_SHIFT,
DCLK_EBC_SEL_GPLL_400M = 0,
DCLK_EBC_SEL_CPLL_333M,
DCLK_EBC_SEL_GPLL_200M,
/* CRU_CLK_SEL50_CON */
PCLK_BUS_SEL_SHIFT = 4,
PCLK_BUS_SEL_MASK = 3 << PCLK_BUS_SEL_SHIFT,
@ -429,5 +436,9 @@ enum {
ACLK_TOP_HIGH_SEL_400M,
ACLK_TOP_HIGH_SEL_300M,
ACLK_TOP_HIGH_SEL_24M,
/* CRU_CLK_SEL79_CON */
CPLL_333M_DIV_SHIFT = 0,
CPLL_333M_DIV_MASK = 0x1f << CPLL_333M_DIV_SHIFT,
};
#endif

52
drivers/clk/rockchip/clk_rk3568.c
View File

@ -1900,6 +1900,50 @@ static ulong rk3568_gmac_tx_rx_set_clk(struct rk3568_clk_priv *priv,
return 0;
}
static ulong rk3568_ebc_get_clk(struct rk3568_clk_priv *priv, ulong clk_id)
{
struct rk3568_cru *cru = priv->cru;
u32 con, div, p_rate;
con = readl(&cru->clksel_con[79]);
div = (con & CPLL_333M_DIV_MASK) >> CPLL_333M_DIV_SHIFT;
p_rate = DIV_TO_RATE(priv->cpll_hz, div);
if (clk_id == CPLL_333M)
return p_rate;
con = readl(&cru->clksel_con[43]);
div = (con & DCLK_EBC_SEL_MASK) >> DCLK_EBC_SEL_SHIFT;
switch (div) {
case DCLK_EBC_SEL_GPLL_400M:
return 400 * MHz;
case DCLK_EBC_SEL_CPLL_333M:
return p_rate;
case DCLK_EBC_SEL_GPLL_200M:
return 200 * MHz;
default:
return -ENOENT;
}
}
static ulong rk3568_ebc_set_clk(struct rk3568_clk_priv *priv,
ulong clk_id, ulong rate)
{
struct rk3568_cru *cru = priv->cru;
int src_clk_div;
src_clk_div = DIV_ROUND_UP(priv->cpll_hz, rate);
assert(src_clk_div - 1 <= 31);
rk_clrsetreg(&cru->clksel_con[79],
CPLL_333M_DIV_MASK,
(src_clk_div - 1) << CPLL_333M_DIV_SHIFT);
if (clk_id == DCLK_EBC)
rk_clrsetreg(&cru->clksel_con[43],
DCLK_EBC_SEL_MASK,
DCLK_EBC_SEL_CPLL_333M << DCLK_EBC_SEL_SHIFT);
return rk3568_ebc_get_clk(priv, clk_id);
}
static ulong rk3568_clk_get_rate(struct clk *clk)
{
struct rk3568_clk_priv *priv = dev_get_priv(clk->dev);
@ -2017,6 +2061,10 @@ static ulong rk3568_clk_get_rate(struct clk *clk)
case CLK_GMAC1_PTP_REF:
rate = rk3568_gmac_ptp_ref_get_clk(priv, 1);
break;
case CPLL_333M:
case DCLK_EBC:
rate = rk3568_ebc_get_clk(priv, clk->id);
break;
case ACLK_SECURE_FLASH:
case ACLK_CRYPTO_NS:
case HCLK_SECURE_FLASH:
@ -2153,6 +2201,10 @@ static ulong rk3568_clk_set_rate(struct clk *clk, ulong rate)
case CLK_GMAC1_PTP_REF:
rate = rk3568_gmac_ptp_ref_set_clk(priv, 1, rate);
break;
case CPLL_333M:
case DCLK_EBC:
rate = rk3568_ebc_set_clk(priv, clk->id, rate);
break;
case ACLK_SECURE_FLASH:
case ACLK_CRYPTO_NS:
case HCLK_SECURE_FLASH:

1
include/dt-bindings/clock/rk3568-cru.h
View File

@ -73,6 +73,7 @@
#define PLL_NPLL 6
/* cru clocks */
#define CPLL_333M 9
#define ARMCLK 10
#define USB480M 11
#define ACLK_CORE_NIU2BUS 18