[PATCH 1/3] drivers: clk: rockchip: clk_rk3328: Add SPI support

Johannes Krottmayer
2020-07-08T21:57:38Z

Add SPI support for the RK3328 clock driver

Signed-off-by: Johannes Krottmayer <krjdev@gmail.com>
Cc: Kever Yang <kever.yang@rock-chips.com>
Cc: Jagan Teki <jagan@amarulasolutions.com>
---
drivers/clk/rockchip/clk_rk3328.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)

diff --git a/drivers/clk/rockchip/clk_rk3328.c b/drivers/clk/rockchip/clk_rk3328.c
index 02d3b08efa..bf4f1069ea 100644
--- a/drivers/clk/rockchip/clk_rk3328.c
+++ b/drivers/clk/rockchip/clk_rk3328.c
@@ -555,6 +555,31 @@ static ulong rk3328_saradc_set_clk(struct rk3328_cru *cru, uint hz)
return rk3328_saradc_get_clk(cru);
}

+static ulong rk3328_spi_get_clk(struct rk3328_cru *cru)
+{
+ u32 div, val;
+
+ val = readl(&cru->clksel_con[24]);
+ div = (val & CLK_SPI_DIV_CON_MASK) >> CLK_SPI_DIV_CON_SHIFT;
+
+ return DIV_TO_RATE(OSC_HZ, div);
+}
+
+static ulong rk3328_spi_set_clk(struct rk3328_cru *cru, uint hz)
+{
+ u32 src_clk_div;
+
+ src_clk_div = GPLL_HZ / hz;
+ assert(src_clk_div < 128);
+
+ rk_clrsetreg(&cru->clksel_con[24],
+ CLK_PWM_PLL_SEL_MASK | CLK_PWM_DIV_CON_MASK,
+ CLK_PWM_PLL_SEL_GPLL << CLK_PWM_PLL_SEL_SHIFT |
+ (src_clk_div - 1) << CLK_PWM_DIV_CON_SHIFT);
+
+ return rk3328_spi_get_clk(cru);
+}
+
static ulong rk3328_clk_get_rate(struct clk *clk)
{
struct rk3328_clk_priv *priv = dev_get_priv(clk->dev);
@@ -581,6 +606,9 @@ static ulong rk3328_clk_get_rate(struct clk *clk)
case SCLK_SARADC:
rate = rk3328_saradc_get_clk(priv->cru);
break;
+ case SCLK_SPI:
+ rate = rk3328_spi_get_clk(priv->cru);
+ break;
default:
return -ENOENT;
}
@@ -617,6 +645,9 @@ static ulong rk3328_clk_set_rate(struct clk *clk, ulong rate)
case SCLK_SARADC:
ret = rk3328_saradc_set_clk(priv->cru, rate);
break;
+ case SCLK_SPI:
+ ret = rk3328_spi_set_clk(priv->cru, rate);
+ break;
case DCLK_LCDC:
case SCLK_PDM:
case SCLK_RTC32K:
--
2.26.2