lkml.org 
[lkml]   [2019]   [Jan]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v7 6/6] clk: RK808: add RK809 and RK817 support.
Date
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>
---
drivers/clk/Kconfig | 9 +++---
drivers/clk/clk-rk808.c | 64 ++++++++++++++++++++++++++++++++++++++++-
2 files changed, 67 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index e5b2fe80eab4..532ab112fa8a 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -52,13 +52,12 @@ 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
diff --git a/drivers/clk/clk-rk808.c b/drivers/clk/clk-rk808.c
index 8d90bdf5b946..75f2cf0dfc9f 100644
--- a/drivers/clk/clk-rk808.c
+++ b/drivers/clk/clk-rk808.c
@@ -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 */
--
2.17.1


\
 
 \ /
  Last update: 2019-01-02 11:29    [W:0.115 / U:0.268 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site