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clk: convert API to match reset/mailbox style

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The following changes are made to the clock API:
* The concept of "clocks" and "peripheral clocks" are unified; each clock
  provider now implements a single set of clocks. This provides a simpler
  conceptual interface to clients, and better aligns with device tree
  clock bindings.
* Clocks are now identified with a single "struct clk", rather than
  requiring clients to store the clock provider device and clock identity
  values separately. For simple clock consumers, this isolates clients
  from internal details of the clock API.
* clk.h is split so it only contains the client/consumer API, whereas
  clk-uclass.h contains the provider API. This aligns with the recently
  added reset and mailbox APIs.
* clk_ops .of_xlate(), .request(), and .free() are added so providers
  can customize these operations if needed. This also aligns with the
  recently added reset and mailbox APIs.
* clk_disable() is added.
* All users of the current clock APIs are updated.
* Sandbox clock tests are updated to exercise clock lookup via DT, and
  clock enable/disable.
* rkclk_get_clk() is removed and replaced with standard APIs.

Buildman shows no clock-related errors for any board for which buildman
can download a toolchain.

test/py passes for sandbox (which invokes the dm clk test amongst
others).

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Stephen Warren
2016-06-17 09:44:00 -06:00
committed by Simon Glass
parent 4581b717b1
commit 135aa95002
37 changed files with 1009 additions and 594 deletions
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6
drivers/i2c/rk_i2c.c
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@@ -29,10 +29,9 @@ DECLARE_GLOBAL_DATA_PTR;
#define RK_I2C_FIFO_SIZE 32
struct rk_i2c {
struct udevice *clk;
struct clk clk;
struct i2c_regs *regs;
unsigned int speed;
int clk_id;
};
static inline void rk_i2c_get_div(int div, int *divh, int *divl)
@@ -55,7 +54,7 @@ static void rk_i2c_set_clk(struct rk_i2c *i2c, uint32_t scl_rate)
int div, divl, divh;
/* First get i2c rate from pclk */
i2c_rate = clk_get_periph_rate(i2c->clk, i2c->clk_id);
i2c_rate = clk_get_rate(&i2c->clk);
div = DIV_ROUND_UP(i2c_rate, scl_rate * 8) - 2;
divh = 0;
@@ -362,7 +361,6 @@ static int rockchip_i2c_ofdata_to_platdata(struct udevice *bus)
bus->name, ret);
return ret;
}
priv->clk_id = ret;
return 0;
}