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clk: RK808: Add RK809 and RK817 support. 

RK809 and RK817 are power management IC chips for multimedia products.
most of their functions and registers are same, including the clkout
funciton.

Signed-off-by: Tony Xie <tony.xie@rock-chips.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Tony Xie 2019-06-21 06:34:55 -04:00 committed by Lee Jones
parent dc79054a64
commit 8ed1440197
2 changed files with 67 additions and 6 deletions
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9
drivers/clk/Kconfig
View File

@ -53,13 +53,12 @@ config COMMON_CLK_MAX9485
This driver supports Maxim 9485 Programmable Audio Clock Generator
config COMMON_CLK_RK808
tristate "Clock driver for RK805/RK808/RK818"
tristate "Clock driver for RK805/RK808/RK809/RK817/RK818"
depends on MFD_RK808
---help---
This driver supports RK805, RK808 and RK818 crystal oscillator clock. These
multi-function devices have two fixed-rate oscillators,
clocked at 32KHz each. Clkout1 is always on, Clkout2 can off
by control register.
This driver supports RK805, RK809 and RK817, RK808 and RK818 crystal oscillator clock.
These multi-function devices have two fixed-rate oscillators, clocked at 32KHz each.
Clkout1 is always on, Clkout2 can off by control register.
config COMMON_CLK_HI655X
tristate "Clock driver for Hi655x" if EXPERT

64
drivers/clk/clk-rk808.c
View File

@ -96,6 +96,68 @@ of_clk_rk808_get(struct of_phandle_args *clkspec, void *data)
return idx ? &rk808_clkout->clkout2_hw : &rk808_clkout->clkout1_hw;
}
static int rk817_clkout2_enable(struct clk_hw *hw, bool enable)
{
struct rk808_clkout *rk808_clkout = container_of(hw,
struct rk808_clkout,
clkout2_hw);
struct rk808 *rk808 = rk808_clkout->rk808;
return regmap_update_bits(rk808->regmap, RK817_SYS_CFG(1),
RK817_CLK32KOUT2_EN,
enable ? RK817_CLK32KOUT2_EN : 0);
}
static int rk817_clkout2_prepare(struct clk_hw *hw)
{
return rk817_clkout2_enable(hw, true);
}
static void rk817_clkout2_unprepare(struct clk_hw *hw)
{
rk817_clkout2_enable(hw, false);
}
static int rk817_clkout2_is_prepared(struct clk_hw *hw)
{
struct rk808_clkout *rk808_clkout = container_of(hw,
struct rk808_clkout,
clkout2_hw);
struct rk808 *rk808 = rk808_clkout->rk808;
unsigned int val;
int ret = regmap_read(rk808->regmap, RK817_SYS_CFG(1), &val);
if (ret < 0)
return 0;
return (val & RK817_CLK32KOUT2_EN) ? 1 : 0;
}
static const struct clk_ops rk817_clkout2_ops = {
.prepare = rk817_clkout2_prepare,
.unprepare = rk817_clkout2_unprepare,
.is_prepared = rk817_clkout2_is_prepared,
.recalc_rate = rk808_clkout_recalc_rate,
};
static const struct clk_ops *rkpmic_get_ops(long variant)
{
switch (variant) {
case RK809_ID:
case RK817_ID:
return &rk817_clkout2_ops;
/*
* For the default case, it match the following PMIC type.
* RK805_ID
* RK808_ID
* RK818_ID
*/
default:
return &rk808_clkout2_ops;
}
}
static int rk808_clkout_probe(struct platform_device *pdev)
{
struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
@ -127,7 +189,7 @@ static int rk808_clkout_probe(struct platform_device *pdev)
return ret;
init.name = "rk808-clkout2";
init.ops = &rk808_clkout2_ops;
init.ops = rkpmic_get_ops(rk808->variant);
rk808_clkout->clkout2_hw.init = &init;
/* optional override of the clockname */