[Patch v8] driver/clk/clk-si5338: Add common clock framework driver for si5338

York Sun
2016-08-23T22:38:53Z

From: York Sun <yorksun@freescale.com>

SI5338 is a programmable clock generator. It has 4 sets of inputs,
PLL, multisynth and dividers to make 4 outputs. This driver splits
them into multiple clocks to comply with common clock framework.

See Documentation/devicetree/bindings/clock/silabs,si5338.txt for
details.

Signed-off-by: York Sun <yorksun@freescale.com>
CC: Mike Turquette <mturquette@baylibre.com>
CC: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
CC: Guenter Roeck <linux@roeck-us.net>
CC: Andrey Filippov <andrey@elphel.com>
CC: Paul Bolle <pebolle@tiscali.nl>

---
Change log:
v8: Rebase to clk-next (v4.8.0-rc1)
v7: Rebase to clk-next (v4.3.0-rc3)
Removed unneeded header file inclusion
Add static to local array
Remove unneeded casting
Update document according to changes
Add more checks to catch divided by zero
Use devm_clk_get instead of of_clk_get
Move devm_clk_get to probe function, only called when needed
Remove clk pointers from platform data structure

v6: Fix multiline comments style
Add msleep in loop of polling registers
Deal with function return error consistently
Remove unnecessary memset calls
Fix calling strncat
Use IS_ERR_OR_NULL when applicable
Add a local function devm_of_clk_get()
Remove clk_put in remove function
Use clkout name in device tree and platform data if set
Add warning if name is too long for clkdev
s/if (a == 0)/if (!a)
s/if (a != 0)/if (a)
Remove "if (a) a = 1" and alike
Add dealing with -EPROBE_DEFER for of_clk_get()
Prepare the clocks before calling post init as required by HW
Update module license to GPL v2 be consistent with header

v5: Rebase to v4.2
Move clk-si5338.h file into clk-si5338.c
Drop unused macros
Add macro HWDATA to replace container_of
Collapse functions for using bsearch
Use return inside switch {}
Separate hardware setting from recalc
Rename variable ms and p123
Remove casting for returns and write_reg
Change device_attr to S_IRUGO
Drop sysfs, use debugfs for output status
Drop exporting __clk_is_prepared
Add "enabled" in device tree binding if the clocks need to be
enabled when driver is loaded
Add enable/disable ops for clock output

v4: Add binding silabs,pll-vco
Set pll rate initial value
Separate COMMON_CLK change from this patch

v3: Add calling unprepare upon removal
Add registering to clkdev so the clk can be acquired when device
tree is not in use
Add a dev_info message when driver is removed
Add missing "static" to two functions in clk-si5338.c
Cosmatic fix in dt-bindings.clock/clk-si5338.h

v2: Fix handling name prefix if the driver is unloaded and loaded again
---
.../devicetree/bindings/clock/silabs,si5338.txt | 192 +
drivers/clk/Kconfig | 12 +
drivers/clk/Makefile | 1 +
drivers/clk/clk-si5338.c | 3802 ++++++++++++++++++++
include/dt-bindings/clock/clk-si5338.h | 68 +
include/linux/platform_data/si5338.h | 48 +
6 files changed, 4123 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/silabs,si5338.txt
create mode 100644 drivers/clk/clk-si5338.c
create mode 100644 include/dt-bindings/clock/clk-si5338.h
create mode 100644 include/linux/platform_data/si5338.h

diff --git a/Documentation/devicetree/bindings/clock/silabs,si5338.txt b/Documentation/devicetree/bindings/clock/silabs,si5338.txt
new file mode 100644
index 0000000..cc7ae8e
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/silabs,si5338.txt
@@ -0,0 +1,192 @@
+Binding for Silicon Labs Si5338 programmable i2c clock generator.
+
+Reference
+[1] Si5338 Data Sheet
+ http://www.silabs.com/Support%20Documents/TechnicalDocs/Si5338.pdf
+
+The Si5338 is a programmable i2c clock generators with up to 4 output
+clocks. It has 4 sets of possible input clocks
+
+IN1/IN2: differential
+IN3: single-ended
+IN4: single-ended
+IN5/IN6: differential
+
+Additionally, IN1/IN2 can be used as XTAL with different setting.
+The clock tree looks like below (without support of zero-delay)
+
+
+ IN1/IN2 IN3 IN4 IN5/IN6
+ | | | |
+ ------| | | |
+ | | | | |
+ | \ / \ /
+ | \ / \ /
+ | \ / \ /
+ XTAL REFCLK FBCLK
+ | | \ / |
+ | | \ / |
+ | | DIVREFCLK DIVFBCLK |
+ | | \ / |
+ | | \ / |
+ | | \ / |
+ | | PLL |
+ | | / | | \ |
+ | | / / \ \ |
+ | | / / \ \ |
+ | | / | | \ |
+ | | | | | | |
+ | | MS0 MS1 MS2 MS3 |
+ | | | | | | |
+
+ OUT0 OUT1 OUT2 OUT3
+
+The output clock can choose from any of the above clock as its source, with
+exceptions: MS1 can only be used for OUT1, MS2 can only be used for OUT2, MS3
+can only be used for OUT3.
+
+==I2C device node==
+
+Required properties:
+- compatible: shall be "silabs,si5338".
+- reg: i2c device address, shall be 0x60, 0x61, 0x70, or 0x71
+- #clock-cells: shall be set to 1 for multiple outputs
+- clocks: list of parent clocks in the order of <xtal>, <in1/2>, <in3>, <in4>,
+ <in5/6>.
+ Note, xtal and in1/2 are mutually exclusive. Only one can be set.
+- clock-names: The name of the clocks in the same order.
+- #address-cells: shall be set to 1.
+- #size-cells: shall be set to 0.
+- silabs,pll-master: If PLL is used, pick one MS (0, 1, 2, or 3) to allow
+ chaning PLL rate. This is arbitrary since MS0/1/2/3 share one PLL.
+ PLL can be calculated backward to satisfy MS. This node is not
+ required if PLL is not used, or if silabs,pll-vco is set.
+
+Optional properties if not set by platform driver:
+- silab,name-prefix: name prefix for si5338
+ If multiple si5338 chips exist, use name-prefix to form unique names.
+ If omitted, i2c bus name will be used as the prefix.
+- silab,ref-source: source of refclk, valid value is defined as
+ #define SI5338_REF_SRC_CLKIN12 0
+ #define SI5338_REF_SRC_CLKIN3 1
+ #define SI5338_REF_SRC_XTAL 4
+- silab,fb-source: source of fbclk, valid value is defined as
+ #define SI5338_FB_SRC_CLKIN4 2
+ #define SI5338_FB_SRC_CLKIN56 3
+ #define SI5338_FB_SRC_NOCLK 5
+- silabs,pll-source: source of pll, valid value is defined as
+ #define SI5338_PFD_IN_REF_REFCLK 0
+ #define SI5338_PFD_IN_REF_FBCLK 1
+ #define SI5338_PFD_IN_REF_DIVREFCLK 2
+ #define SI5338_PFD_IN_REF_DIVFBCLK 3
+ #define SI5338_PFD_IN_REF_XOCLK 4
+ #define SI5338_PFD_IN_REF_NOCLK 5
+- silabs,pll-vco: Specify VCO frequency for optimal ratios for all outputs.
+ If specified, silabs,pll-master is ignored.
+
+==Child nodes==
+
+Each of the clock outputs can be configured individually by
+using a child node to the I2C device node. If a child node for a clock
+output is not set, platform driver has to set up.
+
+Required child node properties:
+- name: name for the child node
+ It has to be unique. The name prefix is ignored.
+ If using platform data and the name is not specificed,
+ clkout0/1/2/3 will be used with name prefix.
+- reg: number of clock output.
+
+Optional child node properties:
+- silabs,drive-config: the configuration of output driver
+ The valid value list is long. Please refer to soruce code.
+- silabs,clock-source: source clock of the output divider
+ #define SI5338_OUT_MUX_FBCLK 0
+ #define SI5338_OUT_MUX_REFCLK 1
+ #deinfe SI5338_OUT_MUX_DIVFBCLK 2
+ #deinfe SI5338_OUT_MUX_DIVREFCLK 3
+ #deinfe SI5338_OUT_MUX_XOCLK 4
+ #deinfe SI5338_OUT_MUX_MS0 5
+ #deinfe SI5338_OUT_MUX_MSN 6 /* MS0/1/2/3 */
+ #deinfe SI5338_OUT_MUX_NOCLK 7
+- silabs,disable-state : clock output disable state, shall be
+ #define SI5338_OUT_DIS_HIZ 0
+ #define SI5338_OUT_DIS_LOW 1
+ #define SI5338_OUT_DIS_HI 2
+ #define SI5338_OUT_DIS_ALWAYS_ON 3
+- enabled: the output is enabled by default
+ The existence of this node enables the output when the driver is loaded
+ otherwise the clock is only enabled when used
+
+==Example==
+
+/* 25MHz reference crystal */
+ref25: ref25M {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <25000000>;
+};
+clkin56: ref100M {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <100000000>;
+};
+i2c-master-node {
+ si5338: clock-generator@70 {
+ compatible = "silabs,si5338";
+ reg = <0x70>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ #clock-cells = <1>;
+
+ /* connect xtal to 25MHz, in5/in6 to 100MHz */
+ clocks = <&ref25>, <0>, <0>, <0>, <&clkin56>;
+ clock-names = "xtal", "in12", "in3", "in4", "in56";
+
+ /* connect xtal as source of refclk */
+ silab,ref-source = <SI5338_REF_SRC_XTAL>;
+
+ /* connect in5/in6 as source of fbclk */
+ silab,fb-source = <SI5338_FB_SRC_CLKIN56>;
+
+ /* connect divrefclk as source of pll */
+ silab,pll-source = <SI5338_PFD_IN_REF_DIVREFCLK>;
+
+ /* Choose one MS for pll master */
+ silabs,pll-master = <0>;
+
+ /* Specify pll-vco frequency. pll-master is ignored. */
+ silabs,pll-vco = <2450000000>;
+
+ /* output */
+ clkout0 {
+ reg = <0>;
+ silabs,drive-config = "1V8_LVDS";
+ silabs,clock-source = <SI5338_OUT_MUX_MS0>;
+ silabs,disable-state = <SI5338_OUT_DIS_HIZ>;
+ clock-frequency = <125000000>;
+ };
+ clkout1 {
+ reg = <1>;
+ silabs,drive-config = "1V8_LVDS";
+ silabs,clock-source = <SI5338_OUT_MUX_MSN>;
+ silabs,disable-state = <SI5338_OUT_DIS_HIZ>;
+ clock-frequency = <125000000>;
+ };
+ clkout2 {
+ reg = <2>;
+ silabs,drive-config = "1V8_LVDS";
+ silabs,clock-source = <SI5338_OUT_MUX_MSN>;
+ silabs,disable-state = <SI5338_OUT_DIS_HIZ>;
+ clock-frequency = <125000000>;
+ };
+ clkout3 {
+ reg = <3>;
+ silabs,drive-config = "1V8_LVDS";
+ silabs,clock-source = <SI5338_OUT_MUX_MSN>;
+ silabs,disable-state = <SI5338_OUT_DIS_HIZ>;
+ clock-frequency = <125000000>;
+ };
+
+ };
+};
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index bf7d540..2a185fa 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -57,6 +57,18 @@ config COMMON_CLK_SCPI
This driver uses SCPI Message Protocol to interact with the
firmware providing all the clock controls.

+config COMMON_CLK_SI5338
+ tristate "Clock driver for SiLabs 5338"
+ depends on I2C
+ select REGMAP_I2C
+ select RATIONAL
+ ---help---
+ This driver supports Silicon Labs 5338 programmable clock generators,
+ using common clock framework. It needs parent clock as input(s).
+ Internal clocks are registered with unique names in case multiple
+ devices exist. See devicetree/bindings/clock/silabs,si5338.txt
+ under Documentation for details.
+
config COMMON_CLK_SI5351
tristate "Clock driver for SiLabs 5351A/B/C"
depends on I2C
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index e775a83..e2e129c 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -39,6 +39,7 @@ obj-$(CONFIG_CLK_QORIQ) += clk-qoriq.o
obj-$(CONFIG_COMMON_CLK_RK808) += clk-rk808.o
obj-$(CONFIG_COMMON_CLK_S2MPS11) += clk-s2mps11.o
obj-$(CONFIG_COMMON_CLK_SCPI) += clk-scpi.o
+obj-$(CONFIG_COMMON_CLK_SI5338) += clk-si5338.o
obj-$(CONFIG_COMMON_CLK_SI5351) += clk-si5351.o
obj-$(CONFIG_COMMON_CLK_SI514) += clk-si514.o
obj-$(CONFIG_COMMON_CLK_SI570) += clk-si570.o
diff --git a/drivers/clk/clk-si5338.c b/drivers/clk/clk-si5338.c
new file mode 100644
index 0000000..78e9696
--- /dev/null
+++ b/drivers/clk/clk-si5338.c
@@ -0,0 +1,3802 @@
+/*
+ * clk-si5338.c: Silicon Labs Si5338 I2C Clock Generator
+ *
+ * Copyright 2015 Freescale Semiconductor
+ * York Sun <yorksun@freescale.com>
+ *
+ * Some code is taken from si5338.c by Andrey Filippov <andrey@elphel.com>
+ * Copyright 2013 Elphel, Inc.
+ *
+ * SI5338 has several blocks, including
+ * Inputs (IN1/IN2, IN3, IN4, IN5/IN6, XTAL)
+ * PLL (Synthesis stage 1)
+ * MultiSynth (Synthesis state 2)
+ * Outputs (OUT0/1/2/3)
+ * Each block is registered as a clock device to form a tree structure.
+ * See Documentation/devicetree/bindings/clock/silabs,si5338.txt for details.
+ *
+ * This driver uses regmap to cache register values to reduce transactions
+ * on I2C bus. Volatile registers are specified.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <dt-bindings/clock/clk-si5338.h>
+#include <linux/bsearch.h>
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/i2c.h>
+#include <linux/math64.h>
+#include <linux/module.h>
+#include <linux/platform_data/si5338.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+
+#define REG5338_PAGE 255
+#define REG5338_PAGE_MASK 1
+#define REG5338_DEV_CONFIG2 2
+#define REG5338_DEV_CONFIG2_MASK 0x3f
+#define REG5338_DEV_CONFIG2_VAL 38 /* last 2 digits of part number */
+#define LAST_REG 347
+
+#define FVCOMIN 2200000000LL
+#define FVCOMAX 2840000000LL
+#define XTAL_FREQMIN 8000000LL
+#define XTAL_FREQMAX 30000000LL
+#define INFREQMIN 5000000LL
+#define INFREQMAX 710000000LL
+#define INFREQMAX34 200000000LL
+#define INFREQDIV 40000000LL /* divide input frequency if above */
+
+#define MSINT_MIN 4 /* need to exclude 5, 7 in the code */
+#define MSINT_MAX 567
+
+#define AWE_INT_MASK 0x061d
+
+#define AWE_IN_MUX 0x1d18
+#define AWE_IN_MUX1 0x1c1c
+#define AWE_FB_MUX 0x1e18
+#define AWE_FB_MUX1 0x1c20
+
+#define AWE_XTAL_FREQ 0x1c03
+#define AWE_PFD_REF 0x1de0
+#define AWE_PFD_FB 0x1ee0
+#define AWE_P1DIV 0x1d07
+#define AWE_P2DIV 0x1e07
+#define AWE_DRV0_PDN 0x1f01
+#define AWE_MS0_PDN 0x1f02
+#define AWE_R0DIV 0x1f1c
+#define AWE_R0DIV_IN 0x1fe0
+#define AWE_DRV1_PDN 0x2001
+#define AWE_MS1_PDN 0x2002
+#define AWE_R1DIV 0x201c
+#define AWE_R1DIV_IN 0x20e0
+#define AWE_DRV2_PDN 0x2101
+#define AWE_MS2_PDN 0x2102
+#define AWE_R2DIV 0x211c
+#define AWE_R2DIV_IN 0x21e0
+#define AWE_DRV3_PDN 0x2201
+#define AWE_MS3_PDN 0x2202
+#define AWE_R3DIV 0x221c
+#define AWE_R3DIV_IN 0x22e0
+
+#define AWE_DRV0_VDDO 0x2303
+#define AWE_DRV1_VDDO 0x230c
+#define AWE_DRV2_VDDO 0x2330
+#define AWE_DRV3_VDDO 0x23c0
+#define AWE_DRV0_FMT 0x2407
+#define AWE_DRV0_INV 0x2418
+#define AWE_DRV1_FMT 0x2507
+#define AWE_DRV1_INV 0x2518
+#define AWE_DRV2_FMT 0x2607
+#define AWE_DRV2_INV 0x2618
+#define AWE_DRV3_FMT 0x2707
+#define AWE_DRV3_INV 0x2718
+
+#define AWE_DRV0_TRIM 0x281f
+#define AWE_DRV1_TRIM_A 0x28e0
+#define AWE_DRV1_TRIM_B 0x2903
+#define AWE_DRV2_TRIM 0x297c
+#define AWE_DRV3_TRIM 0x2a1f
+
+#define AWE_FCAL_OVRD_07_00 0x2dff
+#define AWE_FCAL_OVRD_15_08 0x2eff
+#define AWE_FCAL_OVRD_17_15 0x2f03
+#define AWE_REG47_72 0x2ffc
+#define AWE_PFD_EXTFB 0x3080
+#define AWE_PLL_KPHI 0x307f
+#define AWE_FCAL_OVRD_EN 0x3180
+#define AWE_VCO_GAIN 0x3170
+#define AWE_RSEL 0x310c
+#define AWE_BWSEL 0x3103
+#define AWE_VCO_GAIN_RSEL_BWSEL 0x317f
+
+#define AWE_PLL_EN 0x32c0
+#define AWE_MSCAL 0x323f
+#define AWE_MS3_HS 0x3380
+#define AWE_MS2_HS 0x3340
+#define AWE_MS1_HS 0x3320
+#define AWE_MS0_HS 0x3310
+#define AWE_MS_PEC 0x3307
+
+#define AWE_MS0_P1_07_00 0x35ff
+#define AWE_MS0_P1_15_08 0x36ff
+#define AWE_MS0_P1_17_16 0x3703
+#define AWE_MS0_P2_05_00 0x37fc
+#define AWE_MS0_P2_13_06 0x38ff
+#define AWE_MS0_P2_21_14 0x39ff
+#define AWE_MS0_P2_29_22 0x3aff
+#define AWE_MS0_P3_07_00 0x3bff
+#define AWE_MS0_P3_15_08 0x3cff
+#define AWE_MS0_P3_23_16 0x3dff
+#define AWE_MS0_P3_29_24 0x3e3f
+
+#define AWE_MS1_P1_07_00 0x40ff
+#define AWE_MS1_P1_15_08 0x41ff
+#define AWE_MS1_P1_17_16 0x4203
+#define AWE_MS1_P2_05_00 0x42fc
+#define AWE_MS1_P2_13_06 0x43ff
+#define AWE_MS1_P2_21_14 0x44ff
+#define AWE_MS1_P2_29_22 0x45ff
+#define AWE_MS1_P3_07_00 0x46ff
+#define AWE_MS1_P3_15_08 0x47ff
+#define AWE_MS1_P3_23_16 0x48ff
+#define AWE_MS1_P3_29_24 0x493f
+
+#define AWE_MS2_P1_07_00 0x4bff
+#define AWE_MS2_P1_15_08 0x4cff
+#define AWE_MS2_P1_17_16 0x4d03
+#define AWE_MS2_P2_05_00 0x4dfc
+#define AWE_MS2_P2_13_06 0x4eff
+#define AWE_MS2_P2_21_14 0x4fff
+#define AWE_MS2_P2_29_22 0x50ff
+#define AWE_MS2_P3_07_00 0x51ff
+#define AWE_MS2_P3_15_08 0x52ff
+#define AWE_MS2_P3_23_16 0x53ff
+#define AWE_MS2_P3_29_24 0x543f
+
+#define AWE_MS3_P1_07_00 0x56ff
+#define AWE_MS3_P1_15_08 0x57ff
+#define AWE_MS3_P1_17_16 0x5803
+#define AWE_MS3_P2_05_00 0x58fc
+#define AWE_MS3_P2_13_06 0x59ff
+#define AWE_MS3_P2_21_14 0x5aff
+#define AWE_MS3_P2_29_22 0x5bff
+#define AWE_MS3_P3_07_00 0x5cff
+#define AWE_MS3_P3_15_08 0x5dff
+#define AWE_MS3_P3_23_16 0x5eff
+#define AWE_MS3_P3_29_24 0x5f3f
+
+#define AWE_MSN_P1_07_00 0x61ff
+#define AWE_MSN_P1_15_08 0x62ff
+#define AWE_MSN_P1_17_16 0x6303
+#define AWE_MSN_P2_05_00 0x63fc
+#define AWE_MSN_P2_13_06 0x64ff
+#define AWE_MSN_P2_21_14 0x65ff
+#define AWE_MSN_P2_29_22 0x66ff
+#define AWE_MSN_P3_07_00 0x67ff
+#define AWE_MSN_P3_15_08 0x68ff
+#define AWE_MSN_P3_23_16 0x69ff
+#define AWE_MSN_P3_29_24 0x6a3f
+
+#define AWE_OUT0_DIS_STATE 0x6ec0
+#define AWE_OUT1_DIS_STATE 0x72c0
+#define AWE_OUT2_DIS_STATE 0x76c0
+#define AWE_OUT3_DIS_STATE 0x7ac0
+
+#define AWE_STATUS 0xdaff
+#define AWE_STATUS_PLL_LOL 0xda10
+#define AWE_STATUS_PLL_LOS_FDBK 0xda08
+#define AWE_STATUS_PLL_LOS_CLKIN 0xda04
+#define AWE_STATUS_PLL_SYS_CAL 0xda01
+
+#define AWE_MS_RESET 0xe204
+
+#define AWE_OUT0_DIS 0xe601
+#define AWE_OUT1_DIS 0xe602
+#define AWE_OUT2_DIS 0xe604
+#define AWE_OUT3_DIS 0xe608
+#define AWE_OUT_ALL_DIS 0xe610
+
+#define AWE_FCAL_07_00 0xebff
+#define AWE_FCAL_15_08 0xecff
+#define AWE_FCAL_17_16 0xed03
+
+#define AWE_DIS_LOS 0xf180
+#define AWE_REG241 0xf1ff
+
+#define AWE_SOFT_RESET 0xf602
+
+#define AWE_MISC_47 0x2ffc /* write 0x5 */
+#define AWE_MISC_106 0x6a80 /* write 0x1 */
+#define AWE_MISC_116 0x7480 /* write 0x1 */
+#define AWE_MISC_42 0x2a20 /* write 0x1 */
+#define AWE_MISC_06A 0x06e0 /* write 0x0 */
+#define AWE_MISC_06B 0x0602 /* write 0x0 */
+#define AWE_MISC_28 0x1cc0 /* write 0x0 */
+
+#define MS_POWER_DOWN 1
+#define MS_POWER_UP 0
+#define OUT_DISABLE 1
+#define OUT_ENABLE 0
+#define DRV_POWERDOWN 1
+#define DRV_POWERUP 0
+
+struct si5338_drv_t {
+ const char *description;
+ u8 fmt;
+ u8 vdd;
+ u8 trim;
+ /* bits [1:0} data,
+ * [3:2] - don't care ([3]==1 - [1] - any, [2]==1 - [0] - any
+ */
+ u8 invert;
+};
+
+#define MAX_NAME_PREFIX 30 /* max 30 characters for the name_prefix */
+#define MAX_NAME_LENGTH 40 /* max 40 charactors for the internal names */
+
+struct si5338_driver_data;
+
+/*
+ * Internal parameters used by PLL and MS
+ * They are used in recalc rate functions before being
+ * written to the device.
+ */
+struct si5338_parameters {
+ u32 p[3];
+ bool valid;
+};
+
+/*
+ * This structure saves params and num variable for clocks
+ * Internal clocks with parameters of multiple input/output
+ * use this structure.
+ */
+struct si5338_hw_data {
+ struct clk_hw hw;
+ struct si5338_driver_data *drvdata;
+ /* params is only used for PLL and multisynth clocks */
+ struct si5338_parameters params;
+ /*
+ * For clkin, clkout, multisynth: index of itself
+ * For refclk, fbclk, pll: index of its source
+ */
+ u8 num;
+};
+#define HWDATA(x) \
+ ((struct si5338_hw_data *)container_of(x, struct si5338_hw_data, hw))
+
+struct si5338_driver_data {
+ struct i2c_client *client;
+ struct regmap *regmap;
+ struct clk_onecell_data onecell;
+
+ /*
+ * The structure of clocks are
+ * Input clocks: pclkin12 - IN1/2
+ * pclkin3 - IN3
+ * pclkin4 - IN4
+ * pclkin56 - IN5/6
+ * pxtal - IN1/2 XTAL
+ * Internal clocks:
+ * xoclk - from pxtal
+ * refclk - from one of IN1/2, IN3, XTAL
+ * divrefclk - from refclk with divider
+ * fbclk - from IN4 or IN5/6
+ * divfbclk - from fbclk
+ * MS0/1/2/3 - from one of xoclk, refclk
+ * diverefclk, fbclk, divfbclk
+ * Output clocks:
+ * clkout0/1/2/3 - from one of internal clocks
+ */
+ /* parent clocks */
+ struct clk *pxtal;
+ const char *pxtal_name;
+ struct clk *pclkin[4];
+ const char *pclkin_name[4];
+
+ /* internal and output clocks */
+ char name_prefix[MAX_NAME_PREFIX];
+ struct clk_hw xtal;
+ struct si5338_hw_data clkin[4];
+ struct si5338_hw_data refclk;
+ struct clk_hw divrefclk;
+ struct si5338_hw_data fbclk;
+ struct clk_hw divfbclk;
+ struct si5338_hw_data pll;
+ struct si5338_hw_data *msynth;
+ struct si5338_hw_data *clkout;
+ struct clk_lookup *lookup[4];
+};
+
+static const char * const si5338_input_names[] = {
+ "in1/in2", "in3", "in4", "in5/in6", "xtal", "noclk"
+};
+
+static const char * const si5338_pll_src_names[] = {
+ "refclk", "fbclk", "divrefclk", "divfbclk", "xtal", "noclk"
+};
+
+static const char * const si5338_msynth_src_names[] = {
+ "pll"
+};
+
+static const char * const si5338_msynth_names[] = {
+ "ms0", "ms1", "ms2", "ms3"
+};
+static const char * const si5338_clkout_names[] = {
+ "clkout0", "clkout1", "clkout2", "clkout3"
+};
+static const char * const si5338_clkout_src_names[] = {
+ "fbclk", "refclk", "divfbclk", "divrefclk", "xtal",
+ "ms0",
+ "msn", /* it is actually ms0, ms1, ms2, ms3 dependings on clkout */
+ "noclk",
+};
+
+/*
+ * This array is used to determine if a register is writable. The mask is
+ * not used in this driver. The data is in format of 0xAAAMM where AAA is
+ * address, MM is bit mask. 1 means the corresponding bit is writable.
+ * Created from SiLabs ClockBuilder output.
+ * Note: Register 226, 230, 241, 246, 255 are not included in header file
+ * from ClockBuilder v2.7 or later. Manually added here.
+ */
+static const u32 register_masks[] = {
+ 0x61d, 0x1b80, 0x1cff, 0x1dff, 0x1eff, 0x1fff, 0x20ff, 0x21ff,
+ 0x22ff, 0x23ff, 0x241f, 0x251f, 0x261f, 0x271f, 0x28ff, 0x297f,
+ 0x2a3f, 0x2dff, 0x2eff, 0x2f3f, 0x30ff, 0x31ff, 0x32ff, 0x33ff,
+ 0x34ff, 0x35ff, 0x36ff, 0x37ff, 0x38ff, 0x39ff, 0x3aff, 0x3bff,
+ 0x3cff, 0x3dff, 0x3e3f, 0x3fff, 0x40ff, 0x41ff, 0x42ff, 0x43ff,
+ 0x44ff, 0x45ff, 0x46ff, 0x47ff, 0x48ff, 0x493f, 0x4aff, 0x4bff,
+ 0x4cff, 0x4dff, 0x4eff, 0x4fff, 0x50ff, 0x51ff, 0x52ff, 0x53ff,
+ 0x543f, 0x55ff, 0x56ff, 0x57ff, 0x58ff, 0x59ff, 0x5aff, 0x5bff,
+ 0x5cff, 0x5dff, 0x5eff, 0x5f3f, 0x61ff, 0x62ff, 0x63ff, 0x64ff,
+ 0x65ff, 0x66ff, 0x67ff, 0x68ff, 0x69ff, 0x6abf, 0x6bff, 0x6cff,
+ 0x6dff, 0x6eff, 0x6fff, 0x70ff, 0x71ff, 0x72ff, 0x73ff, 0x74ff,
+ 0x75ff, 0x76ff, 0x77ff, 0x78ff, 0x79ff, 0x7aff, 0x7bff, 0x7cff,
+ 0x7dff, 0x7eff, 0x7fff, 0x80ff, 0x810f, 0x820f, 0x83ff, 0x84ff,
+ 0x85ff, 0x86ff, 0x87ff, 0x88ff, 0x89ff, 0x8aff, 0x8bff, 0x8cff,
+ 0x8dff, 0x8eff, 0x8fff, 0x90ff, 0x98ff, 0x99ff, 0x9aff, 0x9bff,
+ 0x9cff, 0x9dff, 0x9e0f, 0x9f0f, 0xa0ff, 0xa1ff, 0xa2ff, 0xa3ff,
+ 0xa4ff, 0xa5ff, 0xa6ff, 0xa7ff, 0xa8ff, 0xa9ff, 0xaaff, 0xabff,
+ 0xacff, 0xadff, 0xaeff, 0xafff, 0xb0ff, 0xb1ff, 0xb2ff, 0xb3ff,
+ 0xb4ff, 0xb50f, 0xb6ff, 0xb7ff, 0xb8ff, 0xb9ff, 0xbaff, 0xbbff,
+ 0xbcff, 0xbdff, 0xbeff, 0xbfff, 0xc0ff, 0xc1ff, 0xc2ff, 0xc3ff,
+ 0xc4ff, 0xc5ff, 0xc6ff, 0xc7ff, 0xc8ff, 0xc9ff, 0xcaff, 0xcb0f,
+ 0xccff, 0xcdff, 0xceff, 0xcfff, 0xd0ff, 0xd1ff, 0xd2ff, 0xd3ff,
+ 0xd4ff, 0xd5ff, 0xd6ff, 0xd7ff, 0xd8ff, 0xd9ff, 0xe204, 0xe6ff,
+ 0xf1ff, 0xf202, 0xf6ff, 0xffff, 0x11fff,
+ 0x120ff, 0x121ff, 0x122ff, 0x123ff, 0x124ff, 0x125ff, 0x126ff, 0x127ff,
+ 0x128ff, 0x129ff, 0x12aff, 0x12b0f, 0x12fff, 0x130ff, 0x131ff, 0x132ff,
+ 0x133ff, 0x134ff, 0x135ff, 0x136ff, 0x137ff, 0x138ff, 0x139ff, 0x13aff,
+ 0x13b0f, 0x13fff, 0x140ff, 0x141ff, 0x142ff, 0x143ff, 0x144ff, 0x145ff,
+ 0x146ff, 0x147ff, 0x148ff, 0x149ff, 0x14aff, 0x14b0f, 0x14fff, 0x150ff,
+ 0x151ff, 0x152ff, 0x153ff, 0x154ff, 0x155ff, 0x156ff, 0x157ff, 0x158ff,
+ 0x159ff, 0x15aff, 0x15b0f
+};
+
+/*
+ * Si5338 i2c regmap
+ */
+static inline u8 si5338_reg_read(struct si5338_driver_data *drvdata,
+ u16 reg, u8 *data)
+{
+ u32 val;
+ int ret;
+
+ ret = regmap_read(drvdata->regmap, reg, &val);
+ *data = (u8)val; /* si5338 has u8 value */
+
+ return ret;
+}
+
+static inline int si5338_reg_write(struct si5338_driver_data *drvdata,
+ u16 reg, u8 val, u8 mask)
+{
+ if (mask != 0xff)
+ return regmap_update_bits(drvdata->regmap, reg, mask, val);
+
+ return regmap_write(drvdata->regmap, reg, val);
+}
+
+static int write_field(struct si5338_driver_data *drvdata, u8 data, u32 awe)
+{
+ int rc, nshift;
+ u8 mask, reg_data;
+ u16 reg;
+
+ reg = awe >> 8;
+ mask = awe & 0xff;
+ if (mask) {
+ nshift = 0;
+ while (!((1 << nshift) & mask))
+ nshift++;
+ reg_data = (data & 0xff) << nshift;
+ rc = si5338_reg_write(drvdata, reg, reg_data, mask);
+ if (rc < 0)
+ return rc;
+ }
+
+ return 0;
+}
+
+static int write_multireg64(struct si5338_driver_data *drvdata,
+ u64 data, const u32 *awe)
+{
+ int i, rc, nshift, nbits;
+ u8 mask, reg_data;
+ u16 reg;
+
+ for (i = 0; awe[i]; i++) {
+ reg = awe[i] >> 8;
+ mask = awe[i] & 0xff;
+ if (mask) {
+ nshift = 0;
+ nbits = 1;
+ while (!((1 << nshift) & mask))
+ nshift++;
+ while ((1 << (nshift + nbits)) & mask)
+ nbits++;
+ /*
+ * may have some garbage in high bits,
+ * will be cut of by mask
+ */
+ reg_data = (data & 0xff) << nshift;
+ data >>= nbits;
+ rc = si5338_reg_write(drvdata, reg, reg_data, mask);
+ if (rc < 0)
+ return rc;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * The function forms a 64-bit value from multiple registers.
+ * The lastest value used by si5338 is 48-bit.
+ */
+static int read_multireg64(struct si5338_driver_data *drvdata,
+ const u32 *awe, u64 *data)
+{
+ int i, rc, nshift, nbits, full_shift = 0;
+ u8 val, mask;
+ u16 reg;
+
+ *data = 0;
+
+ for (i = 0; awe[i]; i++) {
+ reg = awe[i] >> 8;
+ mask = awe[i] & 0xff;
+ if (mask) {
+ nshift = 0;
+ nbits = 1;
+ while (!((1 << nshift) & mask))
+ nshift++;
+ while ((1 << (nshift + nbits)) & mask)
+ nbits++;
+ rc = si5338_reg_read(drvdata, reg, &val);
+ if (rc < 0)
+ return rc;
+
+ *data |= (((s64)val & mask) >> nshift) << full_shift;
+ full_shift += nbits;
+ }
+ }
+
+ return 0;
+}
+
+static int read_field(struct si5338_driver_data *drvdata, u32 awe)
+{
+ int rc, nshift;
+ u8 val, mask;
+ u16 reg;
+
+ reg = awe >> 8;
+ mask = awe & 0xff;
+
+ if (mask) {
+ nshift = 0;
+ while (!((1 << nshift) & mask))
+ nshift++;
+ rc = si5338_reg_read(drvdata, reg, &val);
+ if (rc < 0)
+ return rc;
+
+ return (val & mask) >> nshift;
+ }
+
+ return 0;
+}
+
+static int si5338_find_mask(const void *key, const void *elt)
+{
+ const u32 *reg = key;
+ const u32 *register_mask = elt;
+
+ if (*reg > *register_mask >> 8)
+ return 1;
+ if (*reg < *register_mask >> 8)
+ return -1;
+
+ return 0;
+}
+
+static bool si5338_regmap_is_writeable(struct device *dev, unsigned int reg)
+{
+ return bsearch(&reg, register_masks, ARRAY_SIZE(register_masks),
+ sizeof(u32), si5338_find_mask) != NULL;
+}
+
+static bool si5338_regmap_is_volatile(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case (AWE_STATUS >> 8):
+ case (AWE_SOFT_RESET >> 8):
+ case (AWE_FCAL_07_00 >> 8):
+ case (AWE_FCAL_15_08 >> 8):
+ case (AWE_FCAL_17_16 >> 8):
+ return true;
+ }
+
+ return false;
+}
+static const struct regmap_range_cfg si5338_regmap_range[] = {
+ {
+ .selector_reg = REG5338_PAGE, /* 255 */
+ .selector_mask = REG5338_PAGE_MASK, /* 1 */
+ .selector_shift = 0,
+ .window_start = 0,
+ .window_len = 256,
+ .range_min = 0,
+ .range_max = 347,
+ },
+};
+
+static const struct regmap_config si5338_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .cache_type = REGCACHE_RBTREE,
+ .max_register = 347,
+ .ranges = si5338_regmap_range,
+ .num_ranges = ARRAY_SIZE(si5338_regmap_range),
+ .writeable_reg = si5338_regmap_is_writeable,
+ .volatile_reg = si5338_regmap_is_volatile,
+};
+
+/*
+ * SI5338 register access
+ */
+static int _verify_output_channel(int chn)
+{
+ if (chn < 0 || chn > 3) {
+ pr_err("Invalid output channel: %d (only 0..3 are allowed)\n",
+ chn);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int set_in_mux(struct si5338_driver_data *drvdata, int data)
+{
+ int data1, rc;
+
+ switch (data) {
+ case 0:
+ data1 = 0;
+ break;
+ case 1:
+ data1 = 2;
+ break;
+ case 2:
+ data1 = 5;
+ break;
+ default:
+ dev_err(&drvdata->client->dev,
+ "Invalid value for input multiplexer %d\n", data);
+ return -EINVAL;
+ }
+ rc = write_field(drvdata, data, AWE_IN_MUX);
+ if (rc < 0)
+ return rc;
+
+ rc = write_field(drvdata, data1, AWE_IN_MUX1);
+ if (rc < 0)
+ return rc;
+
+ return 0;
+}
+
+static int set_fb_mux(struct si5338_driver_data *drvdata, int data)
+{
+ int data1, rc;
+
+ switch (data) {
+ case 0:
+ data1 = 0;
+ break;
+ case 1:
+ data1 = 1;
+ break;
+ case 2:
+ data1 = 0;
+ break;
+ default:
+ dev_err(&drvdata->client->dev,
+ "Invalid value for feedback multiplexer %d\n", data);
+ return -EINVAL;
+ }
+ rc = write_field(drvdata, data, AWE_FB_MUX);
+ if (rc < 0)
+ return rc;
+
+ rc = write_field(drvdata, data1, AWE_FB_MUX1);
+ if (rc < 0)
+ return rc;
+
+ return 0;
+}
+
+/*
+ * PLL has two inputs, each has multiple sources
+ * 0 - pfd_in_ref
+ * 1 - pfd_in_fb
+ */
+static int get_in_pfd_ref_fb(struct si5338_driver_data *drvdata, int chn)
+{
+ return read_field(drvdata, chn ? AWE_PFD_FB : AWE_PFD_REF);
+}
+
+static int set_in_pfd_ref_fb(struct si5338_driver_data *drvdata,
+ u8 val, int chn)
+{
+ int rc;
+
+ if (val > SI5338_PFD_IN_REF_NOCLK) {
+ dev_err(&drvdata->client->dev,
+ "Invalid value for input pfd selector: %d\n", val);
+ return -EINVAL;
+ }
+ rc = write_field(drvdata, val, chn ? AWE_PFD_FB : AWE_PFD_REF);
+ if (rc < 0)
+ return rc;
+
+ return 0;
+}
+
+/*
+ * Set div for the two dividers
+ * 0 - p1div
+ * 1 - p2div
+ * The dividers have value of 1, 2, 4, 8, 16, 32
+ */
+static int set_in_pdiv(struct si5338_driver_data *drvdata, int div, int chn)
+{
+ u8 val;
+ u32 awe = chn ? AWE_P2DIV : AWE_P1DIV;
+
+ for (val = 0; val < 6; val++) {
+ if ((1 << val) == div)
+ return write_field(drvdata, val, awe);
+ }
+ dev_err(&drvdata->client->dev,
+ "Invalid value for input divider: %d\n", div);
+
+ return -EINVAL;
+}
+
+/*
+ * Si5338 xtal clock input
+ * The clock needs to be within [8MHz .. 30MHz]
+ */
+static int si5338_xtal_prepare(struct clk_hw *hw)
+{
+ struct si5338_driver_data *drvdata =
+ container_of(hw, struct si5338_driver_data, xtal);
+ unsigned long rate = clk_hw_get_rate(hw);
+ int xtal_mode;
+
+ if (rate < XTAL_FREQMIN) {
+ dev_err(&drvdata->client->dev,
+ "Xtal input frequency too low: %lu < %llu\n",
+ rate, XTAL_FREQMIN);
+ return -EINVAL;
+ }
+ if (rate > XTAL_FREQMAX) {
+ dev_err(&drvdata->client->dev,
+ "Xtal input frequency too high: %lu > %llu\n",
+ rate, XTAL_FREQMAX);
+ return -EINVAL;
+ }
+
+ if (rate > 26000000ll)
+ xtal_mode = 3;
+ else if (rate > 19000000ll)
+ xtal_mode = 2;
+ else if (rate > 11000000ll)
+ xtal_mode = 1;
+ else
+ xtal_mode = 0;
+
+ return write_field(drvdata, xtal_mode, AWE_XTAL_FREQ);
+}
+
+static const struct clk_ops si5338_xtal_ops = {
+ .prepare = si5338_xtal_prepare,
+};
+
+static unsigned long si5338_clkin_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+ unsigned long max_rate;
+
+ max_rate = (hwdata->num == SI5338_INPUT_CLK12 ||
+ hwdata->num == SI5338_INPUT_CLK56) ?
+ INFREQMAX : INFREQMAX34;
+ if (parent_rate < INFREQMIN) {
+ dev_err(&drvdata->client->dev,
+ "Input frequency too low: %lu < %llu\n",
+ parent_rate, INFREQMIN);
+ return -EINVAL;
+ }
+ if (parent_rate > max_rate) {
+ dev_err(&drvdata->client->dev,
+ "Input frequency too high: %lu > %lu\n",
+ parent_rate, max_rate);
+ return -EINVAL;
+ }
+
+ return parent_rate;
+}
+
+static const struct clk_ops si5338_clkin_ops = {
+ .recalc_rate = si5338_clkin_recalc_rate,
+};
+
+/*
+ * Si5338 refclk inputs
+ * Input frequency range
+ * IN1/IN2 differential clock [5MHz..710MHz]
+ * IN3 single-ended clock [5MHz..200MHz]
+ * Enforced by si5338_clkin_recalc_rate
+ */
+static int si5338_refclk_reparent(struct si5338_driver_data *drvdata, u8 index)
+{
+ struct si5338_hw_data *hwdata = &drvdata->refclk;
+
+ hwdata->num = SI5338_FB_SRC_NOCLK;
+ switch (index) {
+ case SI5338_REF_SRC_XTAL:
+ /* in mux to XO */
+ hwdata->num = 2;
+ return set_in_mux(drvdata, 2);
+ case SI5338_REF_SRC_CLKIN12:
+ /* in mux to IN12 */
+ hwdata->num = 0;
+ return set_in_mux(drvdata, 0);
+ case SI5338_REF_SRC_CLKIN3:
+ hwdata->num = 1;
+ return set_in_mux(drvdata, 1);
+ }
+ dev_err(&drvdata->client->dev,
+ "Invalid parent (%d) for refclk\n", index);
+
+ return -EINVAL;
+}
+
+/*
+ * refclk's parent
+ * 0 - IN1/IN2
+ * 1 - IN3
+ * 2 - XTAL
+ */
+static int si5338_refclk_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+
+ switch (index) {
+ case 0:
+ return si5338_refclk_reparent(drvdata, SI5338_REF_SRC_CLKIN12);
+ case 1:
+ return si5338_refclk_reparent(drvdata, SI5338_REF_SRC_CLKIN3);
+ case 2:
+ return si5338_refclk_reparent(drvdata, SI5338_REF_SRC_XTAL);
+ }
+ dev_err(&drvdata->client->dev,
+ "Invalid parent index for refclk: %d\n", index);
+
+ return -EINVAL;
+}
+
+static u8 si5338_refclk_get_parent(struct clk_hw *hw)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+
+ /* get input mux */
+ return read_field(drvdata, AWE_IN_MUX);
+}
+
+static const struct clk_ops si5338_refclk_ops = {
+ .set_parent = si5338_refclk_set_parent,
+ .get_parent = si5338_refclk_get_parent,
+};
+
+/*
+ * divrefclk's parent is refclk
+ */
+static int si5338_divrefclk_prepare(struct clk_hw *hw)
+{
+ struct si5338_driver_data *drvdata =
+ container_of(hw, struct si5338_driver_data, divrefclk);
+ int idiv;
+ unsigned long parent_rate = clk_hw_get_rate(clk_hw_get_parent(hw));
+
+ /*
+ * Calculate the lowest ratio to divide the input frequency to 40MHz
+ * or less
+ */
+ for (idiv = 0; idiv < 5; idiv++) {
+ if ((parent_rate >> idiv) <= INFREQDIV)
+ break;
+ }
+
+ return set_in_pdiv(drvdata, 1 << idiv, 0);
+}
+
+static unsigned long si5338_divrefclk_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ int idiv;
+
+ /*
+ * Calculate the lowest ratio to divide the input frequency to 40MHz
+ * or less
+ */
+ for (idiv = 0; idiv < 5; idiv++) {
+ if ((parent_rate >> idiv) <= INFREQDIV)
+ break;
+ }
+
+ return parent_rate >> idiv;
+}
+
+static const struct clk_ops si5338_divrefclk_ops = {
+ .recalc_rate = si5338_divrefclk_recalc_rate,
+ .prepare = si5338_divrefclk_prepare,
+};
+
+/*
+ * Si5338 fbclk inputs
+ * Input frequency range
+ * IN4 single-ended clock [5MHz..200MHz]
+ * IN5/IN6 differential clock [5MHz..710MHz]
+ * Enforced by si5338_clkin_recalc_rate
+ */
+static int si5338_fbclk_reparent(struct si5338_driver_data *drvdata, u8 index)
+{
+ struct si5338_hw_data *hwdata = &drvdata->fbclk;
+
+ hwdata->num = SI5338_FB_SRC_NOCLK;
+ switch (index) {
+ case SI5338_FB_SRC_CLKIN4:
+ /* in mux to IN4 */
+ hwdata->num = 0;
+ return set_fb_mux(drvdata, 1);
+ case SI5338_FB_SRC_CLKIN56:
+ /* in mux to IN56 */
+ hwdata->num = 1;
+ return set_fb_mux(drvdata, 0);
+ case SI5338_FB_SRC_NOCLK:
+ hwdata->num = 2;
+ return set_fb_mux(drvdata, 2);
+ }
+ dev_err(&drvdata->client->dev,
+ "Invalid parent (%d) for fbclk\n", index);
+
+ return -EINVAL;
+}
+
+/*
+ * fbclk's parent can be
+ * 0 - IN4
+ * 1 - IN5/IN6
+ * 2 - NOCLK
+ */
+static int si5338_fbclk_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+
+ switch (index) {
+ case 0:
+ return si5338_fbclk_reparent(drvdata, SI5338_FB_SRC_CLKIN4);
+ case 1:
+ return si5338_fbclk_reparent(drvdata, SI5338_FB_SRC_CLKIN56);
+ case 2:
+ return si5338_fbclk_reparent(drvdata, SI5338_FB_SRC_NOCLK);
+ }
+ dev_err(&drvdata->client->dev,
+ "Invalid parent index for fbclk\n");
+
+ return -EINVAL;
+}
+
+static u8 si5338_fbclk_get_parent(struct clk_hw *hw)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+ int rc;
+
+ /* Return value 0: IN5/IN6
+ * 1: IN4
+ * 2: noclk
+ */
+ rc = read_field(drvdata, AWE_FB_MUX);
+ switch (rc) {
+ case 0:
+ return 1;
+ case 1:
+ return 0;
+ case 2:
+ return 2;
+ default:
+ break;
+ }
+
+ return rc;
+}
+
+static const struct clk_ops si5338_fbclk_ops = {
+ .set_parent = si5338_fbclk_set_parent,
+ .get_parent = si5338_fbclk_get_parent,
+};
+
+/*
+ * divfbclk's parent is fbclk
+ */
+static int si5338_divfbclk_prepare(struct clk_hw *hw)
+{
+ struct si5338_driver_data *drvdata =
+ container_of(hw, struct si5338_driver_data, divfbclk);
+ int idiv;
+ unsigned long parent_rate = clk_hw_get_rate(clk_hw_get_parent(hw));
+
+ for (idiv = 0; idiv < 5; idiv++) {
+ if ((parent_rate >> idiv) <= INFREQDIV)
+ break;
+ }
+
+ return set_in_pdiv(drvdata, 1 << idiv, 1);
+}
+
+static unsigned long si5338_divfbclk_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ int idiv;
+
+ for (idiv = 0; idiv < 5; idiv++) {
+ if ((parent_rate >> idiv) <= INFREQDIV)
+ break;
+ }
+
+ return parent_rate >> idiv;
+}
+
+static const struct clk_ops si5338_divfbclk_ops = {
+ .recalc_rate = si5338_divfbclk_recalc_rate,
+ .prepare = si5338_divfbclk_prepare,
+};
+
+/*
+ * PLL and MultiSynth
+ */
+static int remove_common_factor(u64 *num_denom)
+{
+ u64 a, b, r;
+
+ if (!num_denom[1])
+ return -1; /* zero denominator */
+
+ if (!num_denom[0]) {
+ num_denom[1] = 1;
+ return 1;
+ }
+
+ a = max(num_denom[0], num_denom[1]);
+ b = min(num_denom[0], num_denom[1]);
+ r = b;
+ while (r > 1) {
+ r = a - b * div64_u64(a, b);
+ if (!r) {
+ num_denom[0] = div64_u64(num_denom[0], b);
+ num_denom[1] = div64_u64(num_denom[1], b);
+ return 1;
+ }
+ a = b;
+ b = r;
+ }
+
+ return 0; /* nothing done */
+}
+
+static const u32 awe_msx[5][3][5] = {
+ {
+ {
+ AWE_MS0_P1_07_00,
+ AWE_MS0_P1_15_08,
+ AWE_MS0_P1_17_16,
+ 0,
+ 0
+ },
+ {
+ AWE_MS0_P2_05_00,
+ AWE_MS0_P2_13_06,
+ AWE_MS0_P2_21_14,
+ AWE_MS0_P2_29_22,
+ 0
+ },
+ {
+ AWE_MS0_P3_07_00,
+ AWE_MS0_P3_15_08,
+ AWE_MS0_P3_23_16,
+ AWE_MS0_P3_29_24,
+ 0
+ }
+ },
+ {
+ {
+ AWE_MS1_P1_07_00,
+ AWE_MS1_P1_15_08,
+ AWE_MS1_P1_17_16,
+ 0,
+ 0
+ },
+ {
+ AWE_MS1_P2_05_00,
+ AWE_MS1_P2_13_06,
+ AWE_MS1_P2_21_14,
+ AWE_MS1_P2_29_22,
+ 0
+ },
+ {
+ AWE_MS1_P3_07_00,
+ AWE_MS1_P3_15_08,
+ AWE_MS1_P3_23_16,
+ AWE_MS1_P3_29_24,
+ 0
+ }
+ },
+ {
+ {
+ AWE_MS2_P1_07_00,
+ AWE_MS2_P1_15_08,
+ AWE_MS2_P1_17_16,
+ 0,
+ 0
+ },
+ {
+ AWE_MS2_P2_05_00,
+ AWE_MS2_P2_13_06,
+ AWE_MS2_P2_21_14,
+ AWE_MS2_P2_29_22,
+ 0
+ },
+ {
+ AWE_MS2_P3_07_00,
+ AWE_MS2_P3_15_08,
+ AWE_MS2_P3_23_16,
+ AWE_MS2_P3_29_24,
+ 0
+ }
+ },
+ {
+ {
+ AWE_MS3_P1_07_00,
+ AWE_MS3_P1_15_08,
+ AWE_MS3_P1_17_16,
+ 0,
+ 0
+ },
+ {
+ AWE_MS3_P2_05_00,
+ AWE_MS3_P2_13_06,
+ AWE_MS3_P2_21_14,
+ AWE_MS3_P2_29_22,
+ 0
+ },
+ {
+ AWE_MS3_P3_07_00,
+ AWE_MS3_P3_15_08,
+ AWE_MS3_P3_23_16,
+ AWE_MS3_P3_29_24,
+ 0
+ }
+ },
+ {
+ {
+ AWE_MSN_P1_07_00,
+ AWE_MSN_P1_15_08,
+ AWE_MSN_P1_17_16,
+ 0,
+ 0
+ },
+ {
+ AWE_MSN_P2_05_00,
+ AWE_MSN_P2_13_06,
+ AWE_MSN_P2_21_14,
+ AWE_MSN_P2_29_22,
+ 0
+ },
+ {
+ AWE_MSN_P3_07_00,
+ AWE_MSN_P3_15_08,
+ AWE_MSN_P3_23_16,
+ AWE_MSN_P3_29_24,
+ 0
+ }
+ }
+};
+
+static int _verify_ms_channel(struct device *dev, int chn)
+{
+ if (chn < 0 || chn > 4) {
+ dev_err(dev,
+ "Invalid channel %d. Only 0,1,2,3 and 4 (for MSN) are supported\n",
+ chn);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ * Read parameters of
+ * 0 - MS0
+ * 1 - MS1
+ * 2 - MS2
+ * 3 - MS3
+ * 4 - MSN (PLL)
+ */
+static int get_ms_p(struct si5338_driver_data *drvdata, u32 *p, int chn)
+{
+ int i, rc;
+ u64 data;
+
+ rc = _verify_ms_channel(&drvdata->client->dev, chn);
+ if (rc < 0)
+ return rc;
+
+ for (i = 0; i < 3; i++) {
+ rc = read_multireg64(drvdata, awe_msx[chn][i], &data);
+ if (rc < 0)
+ return rc;
+
+ p[i] = (u32)data; /* only use up to 30 bit here */
+ }
+
+ return 0;
+}
+
+/*
+ * Calculte MS ratio from parameters
+ * ms = a + b / c, where
+ * a = ms[0], b = ms[1], c = ms[2]
+ * SI5338 RM states the formula of parameters as:
+ * p1 = floor(((a * c + b) * 128) / c - 512)
+ * p2 = mod((b * 128), c)
+ * p3 = c
+ * To reverse the formula, we have
+ * b * 128 = k * c + p2; k < 128, p2 < c
+ * p1 = floor(((a * c + b) * 128) / c - 512)
+ * = a * 128 + floor((b * 128) / c) - 512
+ * = a * 128 + k - 512
+ * k = mod(p1, 128) = p1 & 0x7f
+ * c = p3
+ * b = (k * c + p2) / 128 = ((p1 & 0x7f) * p3 + p2) >> 7
+ * a = (p1 + 512) >> 7 = (p1 >> 7) + 4
+ */
+static int p_to_ms(u64 *ms, u32 *p)
+{
+ if (!p[0] && !p[1] && !p[2]) {
+ /* uninitialized parameters in device */
+ ms[0] = 0;
+ ms[1] = 0;
+ ms[2] = 1;
+ } else {
+ /* c = p3 */
+ ms[2] = p[2];
+ /* b = (c * (p1 & 0x7f) + p2) >> 7 */
+ ms[1] = (ms[2] * (p[0] & 0x7f) + p[1]) >> 7;
+ /* a = (p1 >> 7) + 4 */
+ ms[0] = (p[0] >> 7) + 4;
+ }
+ pr_debug("ms[]=%llu + %llu/%llu, p=%u %u %u\n",
+ ms[0], ms[1], ms[2], p[0], p[1], p[2]);
+
+ return 0;
+}
+
+static const u32 awe_ms_hs[] = {
+ AWE_MS0_HS,
+ AWE_MS1_HS,
+ AWE_MS2_HS,
+ AWE_MS3_HS
+};
+
+/*
+ * Read parameters of
+ * 0 - MS0
+ * 1 - MS1
+ * 2 - MS2
+ * 3 - MS3
+ * 4 - MSN (PLL)
+ */
+static int set_ms_p(struct si5338_driver_data *drvdata,
+ u32 *p, int chn)
+{
+ int i, rc, hs = 0;
+
+ rc = _verify_ms_channel(&drvdata->client->dev, chn);
+ if (rc < 0)
+ return rc;
+
+ /* high speed bit programming */
+ if (p[0] < 512) { /* div less than 8 */
+ if (p[0] < 128)
+ p[0] = 0;
+ else
+ p[0] = 256;
+ p[1] = 0;
+ p[2] = 1;
+ hs = 1;
+ dev_dbg(&drvdata->client->dev,
+ "Using high speed divider option on ms%d",
+ chn);
+ }
+
+ rc = write_field(drvdata, hs, awe_ms_hs[chn]);
+ if (rc < 0)
+ return rc;
+
+ for (i = 0; i < 3; i++) {
+ rc = write_multireg64(drvdata, (u64)p[i],
+ awe_msx[chn][i]);
+ if (rc < 0)
+ return rc;
+ }
+
+ return 0;
+}
+
+/*
+ * Calculate parameters
+ * ms = ms[0] + ms[1] / ms[2]
+ *
+ * SI5338 RM stats the fomula of parameters as
+ * p[0] = floor(((ms[0] * ms[2] + ms[1]) * 128) / ms[2] - 512)
+ * p[1] = mod((ms[1] * 128), ms[2])
+ * p[2] = ms[2]
+ */
+static int ms_to_p(u64 *ms, u32 *p)
+{
+ u64 d;
+ u64 ms_denom = ms[2], ms_num = ms[1], ms_int = ms[0];
+
+ while (ms_denom >= (1 << 30) || !((ms_denom | ms_num) & 1)) {
+ ms_denom >>= 1;
+ ms_num >>= 1;
+ }
+ if (!ms_num || !ms_denom) {
+ ms_denom = 1;
+ ms_num = 0;
+ }
+ d = (ms_int * ms_denom + ms_num) << 7;
+ p[0] = (u32)(div64_u64(d, ms_denom) - 512);
+ d = div64_u64((ms_num << 7), ms_denom);
+ p[1] = (u32)((ms_num << 7) - d * ms_denom);
+ p[2] = ms_denom;
+ pr_debug("ms[]=%llu + %llu/%llu Hz, ms_int=%llu, ms_num=%llu, ms_denom=%llu p=%u %u %u\n",
+ ms[0], ms[1], ms[2], ms_int, ms_num, ms_denom,
+ p[0], p[1], p[2]);
+
+ return 0;
+}
+
+/*
+ * Calculate MultiSynth divider (MS0..MS3) for specified output frequency
+ */
+static void cal_ms_p(unsigned long numerator,
+ unsigned long denominator,
+ u32 *p)
+{
+ u64 ms[3];
+
+ ms[1] = numerator;
+ ms[2] = denominator;
+ ms[0] = div64_u64(ms[1], ms[2]);
+ ms[1] -= ms[0] * ms[2];
+ while (ms[2] >= (1 << 30)) { /* trim */
+ ms[2] >>= 1;
+ ms[1] >>= 1;
+ }
+ remove_common_factor(&ms[1]);
+
+ if (ms[0] < MSINT_MIN) {
+ pr_warn("Calculated MSN ratio is too low: %llu < %u\n",
+ ms[0], MSINT_MIN);
+ ms[0] = MSINT_MIN;
+ } else if (ms[0] == 5 || ms[0] == 7) {
+ pr_warn("MSN ratio %llu is invalid\n", ms[0]);
+ ms[0] += 1;
+ } else if (ms[0] > MSINT_MAX) {
+ pr_warn("Calculated MSN ratio is too high: %llu > %u\n",
+ ms[0], MSINT_MAX);
+ ms[0] = MSINT_MAX;
+ }
+ pr_debug("MS divider: %llu+%llu/%llu\n", ms[0], ms[1], ms[2]);
+
+ ms_to_p(ms, p);
+}
+
+/*
+ * Si5338 pll section
+ */
+static int si5338_pll_prepare(struct clk_hw *hw)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+ int rc;
+ s64 pll_in_freq;
+ s64 K, Q, kphi_num, kphi_denom, fvco_mhz, fpfd_mhz;
+ int rsel, bwsel, vco_gain, pll_kphi, mscal, ms_pec;
+ u8 vco_gain_rsel_bwsel;
+
+ pll_in_freq = clk_hw_get_rate(clk_hw_get_parent(hw));
+ if (!pll_in_freq) {
+ dev_err(&drvdata->client->dev, "Invalid input clock for pll\n");
+ return -EINVAL;
+ }
+ if (!clk_get_rate(hw->clk)) {
+ dev_err(&drvdata->client->dev, "Invalid clock rate for pll\n");
+ return -EINVAL;
+ }
+
+ fvco_mhz = div64_u64(clk_hw_get_rate(hw), 1000000ll);
+ fpfd_mhz = div64_u64(pll_in_freq, 1000000ll);
+ if (fpfd_mhz >= 15) {
+ K = 925;
+ rsel = 0;
+ bwsel = 0;
+ } else if (fpfd_mhz >= 8) {
+ K = 325;
+ rsel = 1;
+ bwsel = 1;
+ } else {
+ K = 185;
+ rsel = 3;
+ bwsel = 2;
+ }
+ if (fvco_mhz > 2425) {
+ Q = 3;
+ vco_gain = 0;
+ } else {
+ Q = 4;
+ vco_gain = 1;
+ }
+ kphi_num = K * 2500LL * 2500LL * 2500LL;
+ kphi_denom = 533LL * Q * fpfd_mhz * fvco_mhz * fvco_mhz;
+ pll_kphi = (int)div64_u64(kphi_num + (kphi_denom >> 1), kphi_denom);
+ if (pll_kphi < 1 || pll_kphi > 127) {
+ dev_warn(&drvdata->client->dev,
+ "Calculated PLL_KPHI does not fit 1<=%d<=127\n",
+ pll_kphi);
+ if (pll_kphi < 1)
+ pll_kphi = 1;
+ else if (pll_kphi > 127)
+ pll_kphi = 127;
+ }
+ mscal = (int)div64_u64(2067000 - 667 * fvco_mhz + 50000, 100000ll);
+ if (mscal < 0 || mscal > 63) {
+ dev_warn(&drvdata->client->dev,
+ "Calculated MSCAL does not fit 0<=%d<=63\n",
+ mscal);
+ if (mscal < 0)
+ mscal = 0;
+ else if (mscal > 63)
+ mscal = 63;
+ }
+ ms_pec = 7;
+ dev_dbg(&drvdata->client->dev,
+ "Calculated values: PLL_KPHI=%d K=%lld RSEL=%d BWSEL=%d VCO_GAIN=%d MSCAL=%d MS_PEC=%d\n",
+ pll_kphi, K, rsel, bwsel, vco_gain, mscal, ms_pec);
+
+ /* setting actual registers */
+ rc = write_field(drvdata, pll_kphi, AWE_PLL_KPHI);
+ if (rc < 0)
+ return rc;
+
+ vco_gain_rsel_bwsel = (vco_gain & 7) << 4;
+ vco_gain_rsel_bwsel |= (rsel & 3) << 2;
+ vco_gain_rsel_bwsel |= bwsel & 3;
+ rc = write_field(drvdata, vco_gain_rsel_bwsel, AWE_VCO_GAIN_RSEL_BWSEL);
+ if (rc < 0)
+ return rc;
+
+ rc = write_field(drvdata, mscal, AWE_MSCAL);
+ if (rc < 0)
+ return rc;
+
+ rc = write_field(drvdata, ms_pec, AWE_MS_PEC);
+ if (rc < 0)
+ return rc;
+
+ rc = write_field(drvdata, 3, AWE_PLL_EN);
+ if (rc < 0)
+ return rc; /* enable PLL */
+
+ return 0;
+}
+
+static int si5338_pll_reparent(struct si5338_driver_data *drvdata,
+ u8 index)
+{
+ struct si5338_hw_data *hwdata = &drvdata->pll;
+ int rc = -EINVAL;
+
+ hwdata->num = SI5338_PFD_IN_REF_NOCLK;
+ switch (index) {
+ case SI5338_PFD_IN_REF_REFCLK:
+ case SI5338_PFD_IN_REF_FBCLK:
+ case SI5338_PFD_IN_REF_DIVREFCLK:
+ case SI5338_PFD_IN_REF_DIVFBCLK:
+ case SI5338_PFD_IN_REF_XOCLK:
+ case SI5338_PFD_IN_REF_NOCLK:
+ /* pfd_in_ref mux */
+ rc = set_in_pfd_ref_fb(drvdata, index, 0);
+ break;
+ default:
+ dev_err(&drvdata->client->dev,
+ "Invalid pfd_in_ref mux selection %d\n",
+ index);
+ break;
+ }
+
+ if (!rc)
+ hwdata->num = index; /* record the source of pll */
+
+ return rc;
+}
+
+static unsigned char si5338_pll_get_parent(struct clk_hw *hw)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+ int pfd_in_ref;
+
+ /* Get pfd_in_ref mux value */
+ pfd_in_ref = get_in_pfd_ref_fb(drvdata, 0);
+ if (pfd_in_ref < 0) {
+ dev_err(&drvdata->client->dev,
+ "Error getting pfd_in_ref mux\n");
+ /* In case reading register fails, set to 0 */
+ pfd_in_ref = 0;
+ }
+ hwdata->num = pfd_in_ref;
+
+ return pfd_in_ref;
+}
+
+static int si5338_pll_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+
+ return si5338_pll_reparent(hwdata->drvdata, index);
+}
+
+static unsigned long si5338_pll_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+ int rc;
+ u64 rate[3], ms[3], ms_scaled;
+
+ if (!hwdata->params.valid) {
+ rc = get_ms_p(drvdata, hwdata->params.p, 4);
+ if (rc < 0) {
+ dev_err(&drvdata->client->dev,
+ "Error reading ms register\n");
+ return 0;
+ }
+ hwdata->params.valid = true;
+ }
+
+ p_to_ms(ms, hwdata->params.p);
+ if (unlikely(!ms[2])) {
+ /*
+ * This should not happen. Instead of crashing the system,
+ * set divisor to 1 and let the calculation continue.
+ */
+ dev_warn(&drvdata->client->dev,
+ "Error %s calculating pll\n", __func__);
+ ms[2] = 1;
+ }
+ ms_scaled = ms[0] * ms[2] + ms[1];
+ if (!ms_scaled) /* uninitialzied */
+ return 0;
+
+ rate[2] = ms[2];
+ rate[1] = parent_rate * ms_scaled;
+ rate[0] = div64_u64(rate[1], rate[2]);
+ rate[1] -= rate[0] * rate[2];
+ remove_common_factor(&rate[1]);
+ dev_dbg(&drvdata->client->dev,
+ "PLL output frequency: %llu+%llu/%llu Hz\n",
+ rate[0], rate[1], rate[2]);
+
+ return rate[0];
+}
+
+static long si5338_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+ u64 ms[] = {0, 0, 1};
+ u64 new_rate[3], ms_scaled;
+
+ if (unlikely(rate < FVCOMIN))
+ rate = FVCOMIN;
+ else if (unlikely(rate > FVCOMAX))
+ rate = FVCOMAX;
+
+ cal_ms_p(rate, *parent_rate, hwdata->params.p);
+ hwdata->params.valid = true;
+
+ p_to_ms(ms, hwdata->params.p);
+ ms_scaled = ms[0] * ms[2] + ms[1];
+
+ new_rate[2] = ms[2];
+ new_rate[1] = *parent_rate * ms_scaled;
+ new_rate[0] = div64_u64(new_rate[1], new_rate[2]);
+ new_rate[1] -= new_rate[0] * new_rate[2];
+ remove_common_factor(&new_rate[1]);
+ dev_dbg(&drvdata->client->dev,
+ "PLL output frequency: %llu+%llu/%llu Hz\n",
+ new_rate[0], new_rate[1], new_rate[2]);
+
+ return new_rate[0];
+}
+
+static int si5338_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+
+ if (unlikely(rate < FVCOMIN))
+ rate = FVCOMIN;
+ else if (unlikely(rate > FVCOMAX))
+ rate = FVCOMAX;
+ cal_ms_p(rate, parent_rate, hwdata->params.p);
+ hwdata->params.valid = true;
+
+ return set_ms_p(drvdata, hwdata->params.p, 4);
+}
+
+static const struct clk_ops si5338_pll_ops = {
+ .prepare = si5338_pll_prepare,
+ .set_parent = si5338_pll_set_parent,
+ .get_parent = si5338_pll_get_parent,
+ .recalc_rate = si5338_pll_recalc_rate,
+ .round_rate = si5338_pll_round_rate,
+ .set_rate = si5338_pll_set_rate,
+};
+
+/*
+ * Si5338 multisynth divider
+ */
+
+static const u32 awe_ms_powerdown[] = {
+ AWE_MS0_PDN,
+ AWE_MS1_PDN,
+ AWE_MS2_PDN,
+ AWE_MS3_PDN
+};
+
+static int set_ms_powerdown(struct si5338_driver_data *drvdata,
+ int down, int chn)
+{
+ if (chn < 0 || chn > 3)
+ return -EINVAL;
+
+ return write_field(drvdata, down, awe_ms_powerdown[chn]);
+}
+
+static int si5338_msynth_prepare(struct clk_hw *hw)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+
+ return set_ms_powerdown(drvdata, MS_POWER_UP, hwdata->num);
+}
+
+static void si5338_msynth_unprepare(struct clk_hw *hw)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+
+ set_ms_powerdown(drvdata, MS_POWER_DOWN, hwdata->num);
+}
+
+static unsigned long si5338_msynth_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+ int rc;
+ u64 rate[3], ms[3], ms_scaled;
+
+ if (!hwdata->params.valid) {
+ rc = get_ms_p(drvdata, hwdata->params.p, hwdata->num);
+ if (rc < 0)
+ return 0;
+ hwdata->params.valid = true;
+ }
+
+ p_to_ms(ms, hwdata->params.p);
+ if (unlikely(!ms[2])) {
+ /* This should not happen */
+ dev_warn(&drvdata->client->dev,
+ "Error %s calculating MS%d\n", __func__, hwdata->num);
+ ms[2] = 1;
+ }
+ /* trim MS divider fraction */
+ while (ms[2] >= 0x1000) {
+ ms[1] >>= 1;
+ ms[2] >>= 1;
+ }
+ ms_scaled = ms[0] * ms[2] + ms[1];
+ if (!ms_scaled) /* uninitialized */
+ return 0;
+
+ rate[2] = ms_scaled;
+ rate[1] = parent_rate * ms[2];
+ rate[0] = div64_u64(rate[1], rate[2]);
+ rate[1] -= rate[0] * rate[2];
+ remove_common_factor(&rate[1]);
+ dev_dbg(&drvdata->client->dev,
+ "MS%d output frequency: %llu+%llu/%llu Hz\n",
+ hwdata->num, rate[0], rate[1], rate[2]);
+
+ return rate[0];
+}
+
+/*
+ * Based on PLL input clock, estimate best ratio for desired output
+ * if pll vco is not specified.
+ */
+static long si5338_msynth_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+ s64 rate_scaled, pll_in_freq;
+ s64 center, center_diff, best_center_diff = 0;
+ s64 out_div, best_out_div = 1;
+ s64 d, in_div, best_in_div;
+ s64 err, best_err = 0;
+ s64 synth_out;
+ u64 ms[3];
+
+ if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
+ /*
+ * Get rate of the parent of PLL
+ * (could be refclk, fbclk, etc.)
+ */
+ pll_in_freq = clk_hw_get_rate(
+ clk_hw_get_parent(clk_hw_get_parent(hw)));
+ if (!pll_in_freq) {
+ dev_err(&drvdata->client->dev,
+ "Invalid input clock for MS%d\n",
+ hwdata->num);
+ return -EINVAL;
+ }
+
+ center = (FVCOMAX + FVCOMIN) >> 1;
+
+ best_in_div = 0;
+ for (out_div = 4; out_div <= MSINT_MAX; out_div++) {
+ if (out_div == 5 || out_div == 7)
+ continue;
+
+ /* here scaled by denominator */
+ rate_scaled = rate * out_div;
+ if (rate_scaled < FVCOMIN || rate_scaled > FVCOMAX)
+ continue;
+
+ in_div = div64_u64(rate_scaled +
+ (pll_in_freq >> 1),
+ pll_in_freq); /* round */
+
+ /* actual pll frequency scaled by out_denom */
+ d = pll_in_freq * in_div;
+ synth_out = div64_u64(d + (out_div >> 1), out_div);
+ center_diff = d - center;
+ if (center_diff < 0)
+ center_diff = -center_diff;
+ err = synth_out - rate;
+ if (err < 0)
+ err = -err;
+ if (!best_in_div || err < best_err ||
+ (err == best_err &&
+ center_diff < best_center_diff)) {
+ dev_dbg(&drvdata->client->dev,
+ "synth_out: %lld center: %lld rate:%lu err: %lld (%lld) center_diff:%lld(%lld)\n",
+ synth_out, center, rate, err, best_err,
+ center_diff, best_center_diff);
+ best_err = err;
+ best_in_div = in_div;
+ best_out_div = out_div;
+ best_center_diff = center_diff;
+ }
+ }
+ if (!best_in_div) {
+ dev_warn(&drvdata->client->dev,
+ "Failed to find suitable integer coefficients for pll input %lld Hz\n",
+ pll_in_freq);
+ }
+ *parent_rate = pll_in_freq * best_in_div;
+ rate = *parent_rate / (unsigned long)best_out_div;
+ dev_dbg(&drvdata->client->dev,
+ "Best MS output frequency: %lu Hz, MS input divider: %lld, MS output divider: %lld\n",
+ rate, best_in_div, best_out_div);
+ } else {
+ ms[1] = *parent_rate;
+ ms[2] = rate;
+ if (!rate) {
+ dev_err(&drvdata->client->dev,
+ "Invalid rate for MS%d\n", hwdata->num);
+ return -EINVAL;
+ }
+ ms[0] = div64_u64(ms[1], ms[2]);
+ ms[1] -= ms[0] * ms[2];
+ remove_common_factor(&ms[1]);
+ if (ms[0] == 5 || ms[0] == 7)
+ out_div++;
+ rate = div64_u64(*parent_rate * ms[2], ms[1] + ms[0] * ms[2]);
+ dev_dbg(&drvdata->client->dev,
+ "Cloest MS output frequency: %lu Hz, output divider %llu+%llu/%llu\n",
+ rate, ms[0], ms[1], ms[2]);
+ }
+
+ cal_ms_p(*parent_rate, rate, hwdata->params.p);
+ hwdata->params.valid = true;
+
+ return rate;
+}
+
+/*
+ * multisynth's parent is PLL
+ */
+static int si5338_msynth_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+
+ if (!rate)
+ rate = div64_u64(parent_rate + MSINT_MAX - 1, MSINT_MAX);
+
+ cal_ms_p(parent_rate, rate, hwdata->params.p);
+ hwdata->params.valid = true;
+
+ return set_ms_p(drvdata, hwdata->params.p, hwdata->num);
+}
+
+static const struct clk_ops si5338_msynth_ops = {
+ .prepare = si5338_msynth_prepare,
+ .unprepare = si5338_msynth_unprepare,
+ .recalc_rate = si5338_msynth_recalc_rate,
+ .round_rate = si5338_msynth_round_rate,
+ .set_rate = si5338_msynth_set_rate,
+};
+
+/*
+ * Si5338 clkout
+ */
+
+static const u32 awe_out_disable[] = {
+ AWE_OUT0_DIS,
+ AWE_OUT1_DIS,
+ AWE_OUT2_DIS,
+ AWE_OUT3_DIS,
+ AWE_OUT_ALL_DIS
+};
+
+static int set_out_disable(struct si5338_driver_data *drvdata,
+ int dis, int chn)
+{
+ int rc;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ return write_field(drvdata, dis, awe_out_disable[chn]);
+}
+
+static const u32 awe_drv_dis_state[] = {
+ AWE_OUT0_DIS_STATE,
+ AWE_OUT1_DIS_STATE,
+ AWE_OUT2_DIS_STATE,
+ AWE_OUT3_DIS_STATE
+};
+
+static int si5338_clkout_set_disable_state(struct si5338_driver_data *drvdata,
+ int chn, int typ)
+{
+ int rc;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ if (typ < 0 || typ > 3) {
+ dev_err(&drvdata->client->dev,
+ "Invalid disabled state %d. Only 0..3 are supported\n",
+ typ);
+ return -EINVAL;
+ }
+
+ return write_field(drvdata, typ, awe_drv_dis_state[chn]);
+}
+
+static const u32 awe_rdiv_in[] = {
+ AWE_R0DIV_IN,
+ AWE_R1DIV_IN,
+ AWE_R2DIV_IN,
+ AWE_R3DIV_IN
+};
+
+/*
+ * src 0: fbclk
+ * 1: refclk
+ * 2: divfbclk
+ * 3: divrefclk
+ * 4: xoclk
+ * 5: MS0
+ * 6: MS1/2/3 respetivelly
+ */
+static int set_out_mux(struct si5338_driver_data *drvdata, int chn, int src)
+{
+ int rc;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ if (src < 0 || src > 7) {
+ dev_err(&drvdata->client->dev,
+ "Invalid source %d. Only 0...7 are supported\n",
+ src);
+ return -EINVAL;
+ }
+
+ return write_field(drvdata, src, awe_rdiv_in[chn]);
+}
+
+static int get_out_mux(struct si5338_driver_data *drvdata, int chn)
+{
+ int rc;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ return read_field(drvdata, awe_rdiv_in[chn]);
+}
+
+static const u32 awe_drv_fmt[] = {
+ AWE_DRV0_FMT,
+ AWE_DRV1_FMT,
+ AWE_DRV2_FMT,
+ AWE_DRV3_FMT
+};
+
+static int set_drv_type(struct si5338_driver_data *drvdata, int typ, int chn)
+{
+ int rc;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ if (typ < 0 || typ > 7) {
+ dev_err(&drvdata->client->dev,
+ "Invalid output type %d. Only 0..7 are supported\n",
+ typ);
+ return -EINVAL;
+ }
+
+ return write_field(drvdata, typ, awe_drv_fmt[chn]);
+}
+
+static const u32 awe_drv_vddo[] = {
+ AWE_DRV0_VDDO,
+ AWE_DRV1_VDDO,
+ AWE_DRV2_VDDO,
+ AWE_DRV3_VDDO
+};
+
+static int set_drv_vdd(struct si5338_driver_data *drvdata, int vdd, int chn)
+{
+ int rc;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ if (vdd < 0 || vdd > 7) {
+ dev_err(&drvdata->client->dev,
+ "Invalid output type %d. Only 0..3 are supported\n",
+ vdd);
+ return -EINVAL;
+ }
+
+ return write_field(drvdata, vdd, awe_drv_vddo[chn]);
+}
+
+static const u32 awe_drv_trim[][3] = {
+ { AWE_DRV0_TRIM, 0, 0 },
+ { AWE_DRV1_TRIM_A, AWE_DRV1_TRIM_B, 0},
+ { AWE_DRV2_TRIM, 0, 0},
+ { AWE_DRV3_TRIM, 0, 0}
+};
+
+static int set_drv_trim_any(struct si5338_driver_data *drvdata,
+ int trim, int chn)
+{
+ int rc;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ if (trim < 0 || trim > 31) {
+ dev_err(&drvdata->client->dev,
+ "Invalid output type %d. Only 0..31 are supported\n",
+ trim);
+ return -EINVAL;
+ }
+
+ return write_multireg64(drvdata, trim, awe_drv_trim[chn]);
+}
+
+static const u32 awe_drv_invert[] = {
+ AWE_DRV0_INV,
+ AWE_DRV1_INV,
+ AWE_DRV2_INV,
+ AWE_DRV3_INV
+};
+
+static int set_drv_invert(struct si5338_driver_data *drvdata, int typ, int chn)
+{
+ int rc;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ if (typ < 0 || typ > 3) {
+ dev_err(&drvdata->client->dev,
+ "Invalid invert drivers %d. Only 0..3 are supported\n",
+ typ);
+ return -EINVAL;
+ }
+
+ return write_field(drvdata, typ, awe_drv_invert[chn]);
+}
+
+static const u32 awe_drv_powerdown[] = {
+ AWE_DRV0_PDN,
+ AWE_DRV1_PDN,
+ AWE_DRV2_PDN,
+ AWE_DRV3_PDN
+};
+
+static int set_drv_powerdown(struct si5338_driver_data *drvdata,
+ int typ, int chn)
+{
+ int rc;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ return write_field(drvdata, typ, awe_drv_powerdown[chn]);
+}
+
+static const struct si5338_drv_t const drv_configs[] = {
+ {"3V3_CMOS_A+", 0x1, 0x0, 0x17, 0x8}, /* bX0 */
+ {"3V3_CMOS_A-", 0x1, 0x0, 0x17, 0x9}, /* bX1 */
+ {"3V3_CMOS_B+", 0x2, 0x0, 0x17, 0x4}, /* b0X */
+ {"3V3_CMOS_B-", 0x2, 0x0, 0x17, 0x6}, /* b1X */
+ {"3V3_CMOS_A+B+", 0x3, 0x0, 0x17, 0x8},
+ {"3V3_CMOS_A-B+", 0x3, 0x0, 0x17, 0x9},
+ {"3V3_CMOS_A+B-", 0x3, 0x0, 0x17, 0x4},
+ {"3V3_CMOS_A-B-", 0x3, 0x0, 0x17, 0x6},
+
+ {"2V5_CMOS_A+", 0x1, 0x1, 0x13, 0x8},
+ {"2V5_CMOS_A-", 0x1, 0x1, 0x13, 0x9},
+ {"2V5_CMOS_B+", 0x2, 0x1, 0x13, 0x4},
+ {"2V5_CMOS_B-", 0x2, 0x1, 0x13, 0x6},
+ {"2V5_CMOS_A+B+", 0x3, 0x1, 0x13, 0x8},
+ {"2V5_CMOS_A-B+", 0x3, 0x1, 0x13, 0x9},
+ {"2V5_CMOS_A+B-", 0x3, 0x1, 0x13, 0x4},
+ {"2V5_CMOS_A-B-", 0x3, 0x1, 0x13, 0x6},
+
+ {"1V8_CMOS_A+", 0x1, 0x2, 0x15, 0x8},
+ {"1V8_CMOS_A-", 0x1, 0x2, 0x15, 0x9},
+ {"1V8_CMOS_B+", 0x2, 0x2, 0x15, 0x4},
+ {"1V8_CMOS_B-", 0x2, 0x2, 0x15, 0x6},
+ {"1V8_CMOS_A+B+", 0x3, 0x2, 0x15, 0x8},
+ {"1V8_CMOS_A-B+", 0x3, 0x2, 0x15, 0x9},
+ {"1V8_CMOS_A+B-", 0x3, 0x2, 0x15, 0x4},
+ {"1V8_CMOS_A-B-", 0x3, 0x2, 0x15, 0x6},
+
+ {"1V5_HSTL_A+", 0x1, 0x3, 0x1f, 0x8},
+ {"1V5_HSTL_A-", 0x1, 0x3, 0x1f, 0x9},
+ {"1V5_HSTL_B+", 0x2, 0x3, 0x1f, 0x4},
+ {"1V5_HSTL_B-", 0x2, 0x3, 0x1f, 0x6},
+ {"1V5_HSTL_A+B+", 0x3, 0x3, 0x1f, 0x8},
+ {"1V5_HSTL_A-B+", 0x3, 0x3, 0x1f, 0x9},
+ {"1V5_HSTL_A+B-", 0x3, 0x3, 0x1f, 0x4},
+ {"1V5_HSTL_A-B-", 0x3, 0x3, 0x1f, 0x6},
+
+ {"3V3_SSTL_A+", 0x1, 0x0, 0x04, 0x8},
+ {"3V3_SSTL_A-", 0x1, 0x0, 0x04, 0x9},
+ {"3V3_SSTL_B+", 0x2, 0x0, 0x04, 0x4},
+ {"3V3_SSTL_B-", 0x2, 0x0, 0x04, 0x6},
+ {"3V3_SSTL_A+B+", 0x3, 0x0, 0x04, 0x8},
+ {"3V3_SSTL_A-B+", 0x3, 0x0, 0x04, 0x9},
+ {"3V3_SSTL_A+B-", 0x3, 0x0, 0x04, 0x5},
+ {"3V3_SSTL_A-B-", 0x3, 0x0, 0x04, 0x6},
+
+ {"2V5_SSTL_A+", 0x1, 0x1, 0x0d, 0x8},
+ {"2V5_SSTL_A-", 0x1, 0x1, 0x0d, 0x9},
+ {"2V5_SSTL_B+", 0x2, 0x1, 0x0d, 0x4},
+ {"2V5_SSTL_B-", 0x2, 0x1, 0x0d, 0x6},
+ {"2V5_SSTL_A+B+", 0x3, 0x1, 0x0d, 0x8},
+ {"2V5_SSTL_A-B+", 0x3, 0x1, 0x0d, 0x9},
+ {"2V5_SSTL_A+B-", 0x3, 0x1, 0x0d, 0x5},
+ {"2V5_SSTL_A-B-", 0x3, 0x1, 0x0d, 0x6},
+
+ {"1V8_SSTL_A+", 0x1, 0x2, 0x17, 0x8},
+ {"1V8_SSTL_A-", 0x1, 0x2, 0x17, 0x9},
+ {"1V8_SSTL_B+", 0x2, 0x2, 0x17, 0x4},
+ {"1V8_SSTL_B-", 0x2, 0x2, 0x17, 0x6},
+ {"1V8_SSTL_A+B+", 0x3, 0x2, 0x17, 0x8},
+ {"1V8_SSTL_A-B+", 0x3, 0x2, 0x17, 0x9},
+ {"1V8_SSTL_A+B-", 0x3, 0x2, 0x17, 0x4},
+ {"1V8_SSTL_A-B-", 0x3, 0x2, 0x17, 0x6},
+
+ {"3V3_LVPECL", 0x4, 0x0, 0x0f, 0xc},
+ {"2V5_LVPECL", 0x4, 0x1, 0x10, 0xc},
+ {"3V3_LVDS", 0x6, 0x0, 0x03, 0xc},
+ {"2V5_LVDS", 0x6, 0x1, 0x04, 0xc},
+ {"1V8_LVDS", 0x6, 0x2, 0x04, 0xc},
+
+ {},
+};
+
+static int find_drive_config(const char *name)
+{
+ int i;
+
+ for (i = 0; drv_configs[i].description; i++) {
+ if (!strcmp(name, drv_configs[i].description))
+ return i;
+ }
+
+ return -EINVAL;
+}
+
+static int si5338_clkout_set_drive_config(struct si5338_driver_data *drvdata,
+ int chn, const char *name)
+{
+ int i, rc;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ i = find_drive_config(name);
+ if (i < 0) {
+ dev_err(&drvdata->client->dev,
+ "Invalid driver configuration\n");
+ return -EINVAL;
+ }
+
+ rc = set_drv_type(drvdata, drv_configs[i].fmt, chn);
+ if (rc < 0)
+ return rc;
+
+ rc = set_drv_vdd(drvdata, drv_configs[i].vdd, chn);
+ if (rc < 0)
+ return rc;
+
+ rc = set_drv_trim_any(drvdata, drv_configs[i].trim, chn);
+ if (rc < 0)
+ return rc;
+
+ rc = set_drv_invert(drvdata,
+ drv_configs[i].invert & 3, chn);
+ if (rc < 0)
+ return rc;
+
+ return 0;
+}
+
+static const u32 awe_rdiv_k[] = {
+ AWE_R0DIV,
+ AWE_R1DIV,
+ AWE_R2DIV,
+ AWE_R3DIV
+};
+
+static const u8 out_div_values[] = {
+ 1, 2, 4, 8, 16, 32
+};
+
+static int get_out_div(struct si5338_driver_data *drvdata, int chn)
+{
+ int rc;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ rc = read_field(drvdata, awe_rdiv_k[chn]);
+ if (rc < 0)
+ return rc;
+
+ if (rc >= ARRAY_SIZE(out_div_values)) {
+ dev_err(&drvdata->client->dev,
+ "Invalid value for output divider: %d\n",
+ rc);
+ return -EINVAL;
+ }
+
+ return out_div_values[rc];
+}
+
+static int set_out_div(struct si5338_driver_data *drvdata, int div, int chn)
+{
+ int rc;
+ u8 val;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ for (val = 0; val < ARRAY_SIZE(out_div_values); val++) {
+ if (out_div_values[val] == div) {
+ rc = write_field(drvdata, val, awe_rdiv_k[chn]);
+ if (rc < 0)
+ return rc;
+
+ return 0;
+ }
+ }
+ dev_err(&drvdata->client->dev,
+ "Invalid value for output divider: %d\n",
+ div);
+
+ return -EINVAL;
+}
+
+static int get_status(struct si5338_driver_data *drvdata)
+{
+ return read_field(drvdata, AWE_STATUS);
+}
+
+static int power_up_down_needed_ms(struct si5338_driver_data *drvdata)
+{
+ int rc, chn, out_src;
+ int ms_used = 0;
+
+ for (chn = 0; chn < 4; chn++) {
+ out_src = get_out_mux(drvdata, chn);
+ if (out_src < 0)
+ return out_src;
+
+ switch (out_src) {
+ case 5:
+ ms_used |= 1;
+ break;
+ case 6:
+ ms_used |= (1 << chn);
+ break;
+ }
+ }
+ for (chn = 0; chn < 4; chn++) {
+ rc = set_ms_powerdown(drvdata,
+ (ms_used & (1 << chn)) ? MS_POWER_UP :
+ MS_POWER_DOWN,
+ chn);
+ if (rc < 0)
+ return rc;
+ }
+
+ return 0;
+}
+
+static const u32 awe_fcal[] = {
+ AWE_FCAL_07_00,
+ AWE_FCAL_15_08,
+ AWE_FCAL_17_16,
+ 0
+};
+
+static const u32 awe_fcal_ovrd[] = {
+ AWE_FCAL_OVRD_07_00,
+ AWE_FCAL_OVRD_15_08,
+ AWE_FCAL_OVRD_17_15,
+ 0
+};
+
+static int reset_ms(struct si5338_driver_data *drvdata)
+{
+ int rc;
+
+ dev_dbg(&drvdata->client->dev, "Resetting MS dividers");
+ /* SET MS RESET = 1 */
+ rc = write_field(drvdata, 1, AWE_MS_RESET);
+ if (rc)
+ return rc;
+
+ /* Wait for 20ms */
+ msleep(20);
+
+ /* SET MS RESET = 0 */
+ rc = write_field(drvdata, 0, AWE_MS_RESET);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+static int set_misc_registers(struct si5338_driver_data *drvdata)
+{
+ /* ST52238 Reference Manual R1.2 p.28 */
+ int rc;
+
+ rc = write_field(drvdata, 0x5, AWE_MISC_47);
+ if (rc)
+ return rc;
+
+ rc = write_field(drvdata, 0x1, AWE_MISC_106);
+ if (rc)
+ return rc;
+
+ rc = write_field(drvdata, 0x1, AWE_MISC_116);
+ if (rc)
+ return rc;
+
+ rc = write_field(drvdata, 0x1, AWE_MISC_42);
+ if (rc)
+ return rc;
+
+ rc = write_field(drvdata, 0x0, AWE_MISC_06A);
+ if (rc)
+ return rc;
+
+ rc = write_field(drvdata, 0x0, AWE_MISC_06B);
+ if (rc)
+ return rc;
+
+ rc = write_field(drvdata, 0x0, AWE_MISC_28);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+/* Disable interrupt, all outputs */
+static int pre_init(struct si5338_driver_data *drvdata)
+{
+ int rc, chn;
+
+ /* Disable interrupts */
+ rc = write_field(drvdata, 0x1d, AWE_INT_MASK);
+ if (rc)
+ return rc;
+
+ /* setup miscelalneous registers */
+ rc = set_misc_registers(drvdata);
+ if (rc)
+ return rc;
+
+ /* disable all outputs */
+ rc = write_field(drvdata, 1, AWE_OUT_ALL_DIS);
+ if (rc)
+ return rc;
+
+ /* pause LOL */
+ rc = write_field(drvdata, 1, AWE_DIS_LOS);
+ if (rc)
+ return rc;
+
+ /* clears outputs pll input/fb muxes to be set later */
+ for (chn = 0; chn < 4; chn++) {
+ rc = set_ms_powerdown(drvdata, MS_POWER_DOWN, chn);
+ if (rc)
+ return rc;
+ rc = set_out_disable(drvdata, OUT_DISABLE, chn);
+ if (rc)
+ return rc;
+ }
+ /* to be explicitly enabled if needed */
+ rc = set_in_pfd_ref_fb(drvdata, 5, 0); /* noclk */
+ if (rc)
+ return rc;
+
+ rc = set_in_pfd_ref_fb(drvdata, 5, 1); /* noclk */
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+#define INIT_TIMEOUT 10 /* max 10 loops */
+
+/* See SI5338 RM for programming procedure */
+static int post_init(struct si5338_driver_data *drvdata)
+{
+ int rc = 0, i, in_src, fb_src, ext_fb, check_los = 0;
+ int timeout = INIT_TIMEOUT;
+ u64 fcal;
+
+ /* validate input clock status */
+ in_src = get_in_pfd_ref_fb(drvdata, 0);
+ if (in_src < 0)
+ return in_src;
+
+ switch (in_src) {
+ case SI5338_PFD_IN_REF_REFCLK:
+ case SI5338_PFD_IN_REF_DIVREFCLK:
+ case SI5338_PFD_IN_REF_XOCLK:
+ check_los |= AWE_STATUS_PLL_LOS_CLKIN;
+ break;
+ case SI5338_PFD_IN_REF_FBCLK:
+ case SI5338_PFD_IN_REF_DIVFBCLK:
+ check_los |= AWE_STATUS_PLL_LOS_FDBK;
+ break;
+ }
+ ext_fb = read_field(drvdata, AWE_PFD_EXTFB);
+ if (ext_fb < 0)
+ return ext_fb;
+
+ if (ext_fb) {
+ fb_src = get_in_pfd_ref_fb(drvdata, 1);
+ if (fb_src < 0)
+ return fb_src;
+
+ switch (in_src) {
+ case SI5338_PFD_IN_FB_REFCLK:
+ case SI5338_PFD_IN_FB_DIVREFCLK:
+ check_los |= AWE_STATUS_PLL_LOS_CLKIN;
+ break;
+ case SI5338_PFD_IN_FB_FBCLK:
+ case SI5338_PFD_IN_FB_DIVFBCLK:
+ check_los |= AWE_STATUS_PLL_LOS_FDBK;
+ break;
+ }
+ }
+ check_los &= 0xf;
+ for (i = 0; i < timeout; i++) {
+ rc = get_status(drvdata);
+ if (rc < 0)
+ return rc;
+
+ if (!(rc & check_los))
+ break; /* inputs OK */
+ msleep(100); /* wait for 100ms before polling */
+ }
+
+ if (i >= timeout) {
+ dev_err(&drvdata->client->dev,
+ "Timeout waiting for input clocks, status=0x%x, mask=0x%x\n",
+ rc, check_los);
+ return -ETIMEDOUT;
+ }
+ dev_dbg(&drvdata->client->dev,
+ "Validated input clocks, t=%d cycles (timeout= %d cycles), status =0x%x, mask=0x%x\n",
+ i, timeout, rc, check_los);
+
+ /* Configure PLL for locking, set FCAL_OVRD_EN = 0 */
+ rc = write_field(drvdata, 0, AWE_FCAL_OVRD_EN);
+ if (rc < 0)
+ return rc;
+
+ /* Configure PLL for locking, set SOFT_RESET = 1 (ignore i2c error) */
+ write_field(drvdata, 1, AWE_SOFT_RESET);
+ msleep(25);
+
+ /* re-enable LOL, set reg 241 = 0x65 */
+ rc = write_field(drvdata, 0x65, AWE_REG241);
+ if (rc < 0)
+ return rc;
+
+ check_los |= AWE_STATUS_PLL_LOL | AWE_STATUS_PLL_SYS_CAL;
+ check_los &= 0xf;
+ for (i = 0; i < timeout; i++) {
+ rc = get_status(drvdata);
+ if (rc < 0)
+ return rc;
+
+ if (!(rc & check_los))
+ break; /* alarms not set OK */
+ msleep(100); /* wait for 100ms before polling */
+ }
+ if (i >= timeout) {
+ dev_err(&drvdata->client->dev,
+ "Timeout (%d) waiting for PLL lock, status=0x%x, mask=0x%x\n",
+ i, rc, check_los);
+ return -ETIMEDOUT;
+ }
+ dev_dbg(&drvdata->client->dev,
+ "Validated PLL locked, t=%d cycles (timeout= %d cycles), status =0x%x, mask=0x%x\n",
+ i, timeout, rc, check_los);
+
+ /* copy FCAL values to active registers */
+ rc = read_multireg64(drvdata, awe_fcal, &fcal);
+ if (rc)
+ return rc;
+
+ rc = write_multireg64(drvdata, fcal, awe_fcal_ovrd);
+ if (rc)
+ return rc;
+
+ dev_dbg(&drvdata->client->dev, "Copied FCAL data 0x%llx\n", fcal);
+ /* Set 47[7:2] to 000101b */
+ rc = write_field(drvdata, 5, AWE_REG47_72);
+ if (rc)
+ return rc;
+
+ /* SET PLL to use FCAL values, set FCAL_OVRD_EN=1 */
+ rc = write_field(drvdata, 1, AWE_FCAL_OVRD_EN);
+ if (rc)
+ return rc;
+
+ /* only needed if using down-spread. Won't hurt to do anyway */
+ rc = reset_ms(drvdata);
+ if (rc)
+ return rc;
+
+ /* Enable all (enabled individually) outputs */
+ rc = write_field(drvdata, 0, AWE_OUT_ALL_DIS);
+ if (rc)
+ return rc;
+
+ /* Clearing */
+ write_field(drvdata, 0, AWE_SOFT_RESET);
+
+ /* Power up MS if used, otherwise power down */
+ rc = power_up_down_needed_ms(drvdata);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+static int si5338_clkout_prepare(struct clk_hw *hw)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+ int rc;
+
+ rc = set_drv_powerdown(drvdata, DRV_POWERUP, hwdata->num);
+ if (rc) {
+ dev_err(&drvdata->client->dev,
+ "Error power up clkout%d\n", hwdata->num);
+ }
+ dev_dbg(&drvdata->client->dev, "Clkout%d prepared\n", hwdata->num);
+
+ return rc;
+}
+
+static int si5338_clkout_enable(struct clk_hw *hw)
+{
+
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+ int rc;
+
+ rc = set_out_disable(drvdata, OUT_ENABLE, hwdata->num);
+ if (rc) {
+ dev_err(&drvdata->client->dev,
+ "Error enabling clkout%d\n", hwdata->num);
+ }
+ dev_dbg(&drvdata->client->dev, "Clkout%d enabled\n", hwdata->num);
+
+ return rc;
+}
+
+static void si5338_clkout_disable(struct clk_hw *hw)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+
+ set_out_disable(drvdata, OUT_DISABLE, hwdata->num);
+ dev_dbg(&drvdata->client->dev, "Clkout%d disable\n", hwdata->num);
+}
+
+static void si5338_clkout_unprepare(struct clk_hw *hw)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+
+ set_drv_powerdown(drvdata, DRV_POWERDOWN, hwdata->num);
+ dev_dbg(&drvdata->client->dev, "Clkout%d unprepared\n", hwdata->num);
+}
+
+static int si5338_clkout_reparent(struct si5338_driver_data *drvdata,
+ int num, u8 parent)
+{
+ return set_out_mux(drvdata, num, parent);
+}
+
+static u8 si5338_clkout_get_parent(struct clk_hw *hw)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+
+ return get_out_mux(drvdata, hwdata->num);
+}
+
+static int si5338_clkout_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+
+ return si5338_clkout_reparent(drvdata, hwdata->num, index);
+}
+
+static unsigned long si5338_clkout_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+ unsigned long rate = parent_rate;
+ int rc;
+
+ rc = get_out_div(drvdata, hwdata->num);
+ if (rc <= 0) {
+ rate = 0;
+ dev_warn(&drvdata->client->dev,
+ "Error recalculating rate for clk%d\n", hwdata->num);
+ } else {
+ rate /= rc;
+ }
+ dev_dbg(&drvdata->client->dev, "Recalculated clkout%d rate %lu\n",
+ hwdata->num, rate);
+
+ return rate;
+}
+
+static long si5338_clkout_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+ u64 out_freq_scaled, scaled_max;
+ unsigned long err, new_rate, new_err;
+ u8 r_div = 1;
+
+ out_freq_scaled = rate;
+ /* Request frequency if multisynth master */
+ if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
+ scaled_max = div64_u64(FVCOMAX, MSINT_MAX);
+ while (r_div < 32 && out_freq_scaled < scaled_max) {
+ out_freq_scaled <<= 1;
+ r_div <<= 1;
+ }
+ if (out_freq_scaled < scaled_max) {
+ dev_warn(&drvdata->client->dev,
+ "Specified output frequency is too low: %lu < %lld\n",
+ rate, scaled_max >> 5);
+ r_div = 32;
+ *parent_rate = scaled_max;
+ } else {
+ *parent_rate = out_freq_scaled;
+ }
+ } else {
+ /* round to closest r_div */
+ new_rate = *parent_rate;
+ new_err = abs(new_rate - rate);
+ do {
+ err = new_err;
+ new_rate >>= 1;
+ r_div <<= 1;
+ new_err = abs(new_rate - rate);
+ } while (new_err < err && r_div < 32);
+ r_div >>= 1;
+ }
+ rate = *parent_rate / r_div;
+
+ dev_dbg(&drvdata->client->dev,
+ "%s - %s: r_div = %u, rate = %lu, requesting parent_rate = %lu\n",
+ __func__, __clk_get_name(hwdata->hw.clk), r_div,
+ rate, *parent_rate);
+
+ return rate;
+}
+
+static int si5338_clkout_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct si5338_hw_data *hwdata = HWDATA(hw);
+ struct si5338_driver_data *drvdata = hwdata->drvdata;
+ unsigned long err, new_rate, new_err;
+ int r_div = 1;
+
+ /* round to closest r_div */
+ new_rate = parent_rate;
+ new_err = abs(new_rate - rate);
+ do {
+ err = new_err;
+ new_rate >>= 1;
+ r_div <<= 1;
+ new_err = abs(new_rate - rate);
+ } while (new_err < err && r_div < 32);
+ r_div >>= 1;
+
+ dev_dbg(&drvdata->client->dev,
+ "%s - %s: r_div = %u, parent_rate = %lu, rate = %lu\n",
+ __func__, __clk_get_name(hwdata->hw.clk), r_div,
+ parent_rate, rate);
+
+ return set_out_div(drvdata, r_div, hwdata->num);
+}
+
+static const struct clk_ops si5338_clkout_ops = {
+ .prepare = si5338_clkout_prepare,
+ .unprepare = si5338_clkout_unprepare,
+ .enable = si5338_clkout_enable,
+ .disable = si5338_clkout_disable,
+ .set_parent = si5338_clkout_set_parent,
+ .get_parent = si5338_clkout_get_parent,
+ .recalc_rate = si5338_clkout_recalc_rate,
+ .round_rate = si5338_clkout_round_rate,
+ .set_rate = si5338_clkout_set_rate,
+};
+
+#ifdef CONFIG_DEBUG_FS
+
+static int get_ms_powerdown(struct si5338_driver_data *drvdata, int chn)
+{
+ int rc;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ return read_field(drvdata, awe_ms_powerdown[chn]);
+}
+
+static int get_out_disable(struct si5338_driver_data *drvdata, int chn)
+{
+ int rc;
+
+ rc = _verify_output_channel(chn);
+ if (chn != 4 && rc < 0)
+ return rc;
+
+ return read_field(drvdata, awe_out_disable[chn]);
+}
+
+static int get_drv_disabled_state(struct si5338_driver_data *drvdata, int chn)
+{
+ int rc;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ return read_field(drvdata, awe_drv_dis_state[chn]);
+}
+
+static int get_drv_type(struct si5338_driver_data *drvdata, int chn)
+{
+ int rc;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ return read_field(drvdata, awe_drv_fmt[chn]);
+}
+
+static int get_drv_vdd(struct si5338_driver_data *drvdata, int chn)
+{
+ int rc;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ return read_field(drvdata, awe_drv_vddo[chn]);
+}
+
+static int get_drv_trim(struct si5338_driver_data *drvdata, int chn)
+{
+ int rc;
+ u64 data;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ rc = read_multireg64(drvdata, awe_drv_trim[chn], &data);
+ if (rc < 0)
+ return rc;
+
+ return data; /* 5-bit data */
+}
+
+static int get_drv_invert(struct si5338_driver_data *drvdata, int chn)
+{
+ int rc;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ return read_field(drvdata, awe_drv_invert[chn]);
+}
+
+static int get_drv_powerdown(struct si5338_driver_data *drvdata, int chn)
+{
+ int rc;
+
+ rc = _verify_output_channel(chn);
+ if (rc < 0)
+ return rc;
+
+ return read_field(drvdata, awe_drv_powerdown[chn]);
+}
+
+/*
+ * Create debugfs files for status for each si5338 clkout
+ */
+
+static int clkout_status_show(struct seq_file *s, void *data)
+{
+ struct si5338_hw_data *clkout = s->private;
+ struct si5338_driver_data *drvdata = clkout->drvdata;
+ int i, j, match = 0;
+ int drv_type, drv_vdd, drv_trim, drv_invert;
+ int out_src, src_group = 0, src = 0;
+ const int in_numbers[] = {
+ 12, 3, 4, 56
+ };
+
+ i = clkout->num;
+ seq_printf(s, "%d: ", i);
+ if (get_out_disable(drvdata, i)) {
+ seq_puts(s, "disabled");
+ switch (get_drv_disabled_state(drvdata, i)) {
+ case SI5338_OUT_DIS_HIZ:
+ seq_puts(s, " (high-Z)\n");
+ break;
+ case SI5338_OUT_DIS_LOW:
+ seq_puts(s, " (low)\n");
+ break;
+ case SI5338_OUT_DIS_HI:
+ seq_puts(s, " (high)\n");
+ break;
+ case SI5338_OUT_DIS_ALWAYS_ON:
+ seq_puts(s, " (always on)\n");
+ break;
+ }
+ return 0;
+ }
+
+ seq_puts(s, "enabled ");
+ drv_type = get_drv_type(drvdata, i);
+ if (drv_type < 0)
+ return drv_type;
+
+ drv_vdd = get_drv_vdd(drvdata, i);
+ if (drv_vdd < 0)
+ return drv_vdd;
+
+ drv_trim = get_drv_trim(drvdata, i);
+ if (drv_trim < 0)
+ return drv_trim;
+
+ drv_invert = get_drv_invert(drvdata, i);
+ if (drv_invert < 0)
+ return drv_invert;
+
+ for (j = 0; drv_configs[j].description; j++) {
+ if (drv_configs[j].fmt == drv_type &&
+ drv_configs[j].vdd == drv_vdd &&
+ drv_configs[j].trim == drv_trim &&
+ (drv_invert | (drv_configs[j].invert >> 2)) ==
+ ((drv_configs[j].invert & 3) |
+ (drv_configs[j].invert>>2)))
+ seq_puts(s, drv_configs[j].description);
+ match = 1;
+ }
+
+ if (!match) {
+ seq_printf(s, "Invalid output configuration: type = %d, vdd=%d, trim=%d, invert=%d\n",
+ drv_type, drv_vdd, drv_trim, drv_invert);
+ }
+
+ seq_printf(s, ", R%d and out %d power %s", i, i,
+ get_drv_powerdown(drvdata, i) ? "down" : "up");
+ seq_puts(s, ", Output route ");
+
+ out_src = get_out_mux(drvdata, i);
+ if (out_src < 0)
+ return out_src;
+
+ switch (out_src) {
+ case 0: /* p2div in */
+ case 2: /* p2div out */
+ src = read_field(drvdata, AWE_FB_MUX);
+ if (src < 0)
+ return src;
+
+ src_group = 0;
+ src = src ? 2 : 3; /* mod src: 0 - IN56, 1 - IN4 */
+ break;
+ case 1: /* p1div in */
+ case 3: /* p1div out */
+ src = read_field(drvdata, AWE_IN_MUX);
+ if (src < 0)
+ return src;
+
+ if (src == 2) {
+ src_group = 1;
+ src = 0;
+ } else {
+ src_group = 0; /* keep src: 0 - IN12, 1 - IN3 */
+ }
+ break;
+ case 4:
+ src_group = 1;
+ break;
+ case 5:
+ src_group = 2;
+ src = 0;
+ break;
+ case 6:
+ src_group = 2;
+ src = i;
+ break;
+ case 7:
+ src_group = 3;
+ break;
+ }
+ switch (src_group) {
+ case 0:
+ seq_printf(s, "IN%d", in_numbers[src]);
+ break;
+ case 1:
+ seq_puts(s, "XO");
+ break;
+ case 2:
+ seq_printf(s, "MS%d", src);
+ break;
+ case 3:
+ seq_puts(s, "No clock");
+ break;
+ }
+
+ if (out_src == 5 || out_src == 6) {
+ seq_printf(s, " power %s",
+ get_ms_powerdown(drvdata, i) ? "down" : "up");
+ }
+
+ seq_puts(s, "\n");
+
+ return 0;
+}
+
+static int clkout_status_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, clkout_status_show, inode->i_private);
+}
+
+static const struct file_operations clkout_status_fops = {
+ .open = clkout_status_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int register_debugfs_status(struct si5338_hw_data *clkout)
+{
+ struct dentry *d;
+
+ d = clk_debugfs_add_file(&clkout->hw, "output_status", S_IRUGO,
+ clkout, &clkout_status_fops);
+ if (!d)
+ return -ENOMEM;
+
+ return 0;
+}
+
+#else
+static int register_debugfs_status(struct si5338_hw_data *clkout)
+{
+ return 0;
+}
+#endif /* CONFIG_DEBUG_FS */
+
+/*
+ * Si5351 i2c probe and device tree parsing
+ */
+#ifdef CONFIG_OF
+static const struct of_device_id si5338_dt_ids[] = {
+ { .compatible = "silabs,si5338" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, si5338_dt_ids);
+
+static int si5338_dt_parse(struct i2c_client *client)
+{
+ struct device_node *child, *np = client->dev.of_node;
+ struct si5338_platform_data *pdata;
+ u32 val, num;
+
+ if (np == NULL)
+ return 0;
+
+ pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+
+ /* property silab,name-prefix */
+ of_property_read_string(np, "silab,name-prefix", &pdata->name_prefix);
+
+ /* property silab,ref-source */
+ if (!of_property_read_u32(np, "silab,ref-source", &val)) {
+ switch (val) {
+ case SI5338_REF_SRC_CLKIN12:
+ case SI5338_REF_SRC_CLKIN3:
+ case SI5338_REF_SRC_XTAL:
+ pdata->ref_src = val;
+ dev_dbg(&client->dev, "ref-source = %d\n", val);
+ break;
+ default:
+ dev_err(&client->dev,
+ "Invalid source for refclk %u\n", val);
+ return -EINVAL;
+ }
+ }
+
+ /* property silab,fb-source */
+ if (!of_property_read_u32(np, "silab,fb-source", &val)) {
+ switch (val) {
+ case SI5338_FB_SRC_CLKIN4:
+ case SI5338_FB_SRC_CLKIN56:
+ case SI5338_FB_SRC_NOCLK:
+ pdata->fb_src = val;
+ dev_dbg(&client->dev, "fb-source = %d\n", val);
+ break;
+ default:
+ dev_err(&client->dev,
+ "Invalid source for fbclk %u\n", val);
+ return -EINVAL;
+ }
+ }
+
+ /* property silab,pll-source */
+ if (!of_property_read_u32(np, "silab,pll-source", &val)) {
+ switch (val) {
+ case SI5338_PFD_IN_REF_REFCLK:
+ case SI5338_PFD_IN_REF_FBCLK:
+ case SI5338_PFD_IN_REF_DIVREFCLK:
+ case SI5338_PFD_IN_REF_DIVFBCLK:
+ case SI5338_PFD_IN_REF_XOCLK:
+ case SI5338_PFD_IN_REF_NOCLK:
+ pdata->pll_src = val;
+ dev_dbg(&client->dev, "pll-source = %d\n", val);
+ break;
+ default:
+ dev_err(&client->dev,
+ "Invalid source for pll %u\n", val);
+ return -EINVAL;
+ }
+ }
+
+ /* property silab,pll-vco */
+ if (!of_property_read_u32(np, "silab,pll-vco", &val)) {
+ if (val < FVCOMIN || val > FVCOMAX) {
+ dev_err(&client->dev,
+ "pll-vco out of range [%lldu..%lldu]\n",
+ FVCOMIN, FVCOMAX);
+ return -EINVAL;
+ }
+ pdata->pll_vco = val;
+ }
+
+ if (!of_property_read_u32(np, "silab,pll-master", &val)) {
+ if (val > 3) {
+ dev_err(&client->dev,
+ "Invalid pll-master %u\n", val);
+ return -EINVAL;
+ }
+ pdata->pll_master = val;
+ dev_dbg(&client->dev, "pll-master = %d\n", val);
+ }
+
+ /* per clock out */
+ for_each_child_of_node(np, child) {
+ if (of_property_read_u32(child, "reg", &num)) {
+ dev_err(&client->dev, "Missing reg property of %s\n",
+ child->name);
+ return -EINVAL;
+ }
+ if (num > 4) {
+ dev_err(&client->dev, "Invalid clkout %u\n", num);
+ return -EINVAL;
+ }
+
+ of_property_read_string(child, "name",
+ &pdata->clkout[num].name);
+
+ if (!of_property_read_u32(child, "silabs,clock-source", &val)) {
+ switch (val) {
+ case SI5338_OUT_MUX_FBCLK:
+ case SI5338_OUT_MUX_REFCLK:
+ case SI5338_OUT_MUX_DIVFBCLK:
+ case SI5338_OUT_MUX_DIVREFCLK:
+ case SI5338_OUT_MUX_XOCLK:
+ case SI5338_OUT_MUX_MS0:
+ case SI5338_OUT_MUX_MSN:
+ case SI5338_OUT_MUX_NOCLK:
+ pdata->clkout[num].clkout_src = val;
+ dev_dbg(&client->dev, "clkout_src = %d\n", val);
+ break;
+ default:
+ dev_err(&client->dev,
+ "Invalid source for output %u\n", num);
+ return -EINVAL;
+ }
+ }
+ if (!of_property_read_string(child, "silabs,drive-config",
+ &pdata->clkout[num].drive)) {
+ if (find_drive_config(pdata->clkout[num].drive) < 0) {
+ dev_err(&client->dev,
+ "Invalid drive config for output %u\n",
+ num);
+ return -EINVAL;
+ }
+ dev_dbg(&client->dev, "drive-config = %s\n",
+ pdata->clkout[num].drive);
+ }
+ if (!of_property_read_u32(child,
+ "silabs,disable-state",
+ &val)) {
+ switch (val) {
+ case SI5338_OUT_DIS_HIZ:
+ case SI5338_OUT_DIS_LOW:
+ case SI5338_OUT_DIS_HI:
+ case SI5338_OUT_DIS_ALWAYS_ON:
+ pdata->clkout[num].disable_state = val;
+ dev_dbg(&client->dev,
+ "disable-state = %d\n", val);
+ break;
+ default:
+ dev_err(&client->dev,
+ "Invalid disable state for output %u\n",
+ num);
+ return -EINVAL;
+ }
+ }
+ if (!of_property_read_u32(child, "clock-frequency", &val)) {
+ pdata->clkout[num].rate = val;
+ dev_dbg(&client->dev, "clock-frequency = %d\n", val);
+ }
+ if (of_find_property(child, "enabled", NULL))
+ pdata->clkout[num].enabled = true;
+ }
+ /* Replace platform data with device tree */
+ client->dev.platform_data = pdata;
+
+ return 0;
+}
+#else
+static int si5338_dt_parse(struct i2c_client *client)
+{
+ return 0;
+}
+#endif /* CONFIG_OF */
+
+/*
+ * Returns the clk registered, or an error code. If successful, the clk pointer
+ * is also save in hw->clk.
+ */
+static struct clk *si5338_register_clock(struct device *dev,
+ struct clk_hw *hw,
+ const char *name,
+ const char **parent_names,
+ u8 num_parents,
+ const struct clk_ops *ops,
+ unsigned long flags)
+{
+ struct clk *clk;
+ struct clk_init_data init;
+
+ memset(&init, 0, sizeof(init));
+ init.name = name;
+ init.ops = ops;
+ init.flags = flags;
+ init.parent_names = parent_names;
+ init.num_parents = num_parents;
+ hw->init = &init;
+ dev_dbg(dev, "Registering %s\n", name);
+ clk = devm_clk_register(dev, hw);
+
+ if (IS_ERR(clk))
+ dev_err(dev, "unable to register %s\n", name);
+
+ return clk;
+}
+
+#define STRNCAT_LENGTH (MAX_NAME_LENGTH - name_prefix_length)
+static int si5338_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct si5338_platform_data *pdata;
+ struct si5338_driver_data *drvdata;
+ struct clk *clk = NULL;
+ char name_buf[8][MAX_NAME_LENGTH];
+ char register_name[MAX_NAME_LENGTH];
+ const char *pclkin[4] = {"in12", "in3", "in4", "in56"};
+ const char *parent_names[8] = {
+ name_buf[0], name_buf[1], name_buf[2], name_buf[3],
+ name_buf[4], name_buf[5], name_buf[6], name_buf[7]
+ };
+ int ret, n, name_prefix_length;
+ bool require_xtal = false;
+ bool require_ref = false;
+ bool require_fb = false;
+ bool require_pll = false;
+ unsigned long flags;
+
+ ret = si5338_dt_parse(client);
+ if (ret)
+ return ret;
+
+ pdata = client->dev.platform_data;
+ if (!pdata)
+ return -EINVAL;
+
+ drvdata = devm_kzalloc(&client->dev, sizeof(*drvdata), GFP_KERNEL);
+ if (drvdata == NULL)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, drvdata);
+ drvdata->client = client;
+ if (!pdata->name_prefix) {
+ strlcpy(drvdata->name_prefix,
+ dev_name(&client->dev), MAX_NAME_PREFIX - 2);
+ strncat(drvdata->name_prefix, "-", 1);
+ } else {
+ strlcpy(drvdata->name_prefix,
+ pdata->name_prefix, MAX_NAME_PREFIX);
+ }
+ name_prefix_length = strlen(drvdata->name_prefix);
+
+ /* Check if clkout config is valid */
+ for (n = 0; n < 4; n++) {
+ /* check clkout source config */
+ switch (pdata->clkout[n].clkout_src) {
+ case SI5338_OUT_MUX_NOCLK:
+ if (pdata->clkout[n].rate)
+ pdata->clkout[n].rate = 0;
+ break;
+ case SI5338_OUT_MUX_REFCLK:
+ case SI5338_OUT_MUX_DIVREFCLK:
+ require_ref = true;
+ break;
+ case SI5338_OUT_MUX_FBCLK:
+ case SI5338_OUT_MUX_DIVFBCLK:
+ require_fb = true;
+ break;
+ case SI5338_OUT_MUX_XOCLK:
+ require_xtal = true;
+ break;
+ case SI5338_OUT_MUX_MS0:
+ case SI5338_OUT_MUX_MSN:
+ require_pll = true;
+ break;
+ default:
+ dev_err(&client->dev, "Invalid clkout source\n");
+ return -EINVAL;
+ }
+
+ /* check clkout drive config */
+ if (find_drive_config(pdata->clkout[n].drive) < 0) {
+ dev_err(&client->dev,
+ "Invalid drive config for output %u\n", n);
+ return -EINVAL;
+ }
+
+ /* check clkout disable state config */
+ switch (pdata->clkout[n].disable_state) {
+ case SI5338_OUT_DIS_HIZ:
+ case SI5338_OUT_DIS_LOW:
+ case SI5338_OUT_DIS_HI:
+ case SI5338_OUT_DIS_ALWAYS_ON:
+ break;
+ default:
+ dev_err(&client->dev,
+ "Invalid disable state for output %u\n", n);
+ return -EINVAL;
+ }
+
+ }
+ /* check pll source */
+ if (require_pll) {
+ switch (pdata->pll_src) {
+ case SI5338_PFD_IN_REF_XOCLK:
+ require_xtal = true;
+ break;
+ case SI5338_PFD_IN_REF_REFCLK:
+ case SI5338_PFD_IN_REF_DIVREFCLK:
+ require_ref = true;
+ break;
+ case SI5338_PFD_IN_REF_FBCLK:
+ case SI5338_PFD_IN_REF_DIVFBCLK:
+ require_fb = true;
+ break;
+ case SI5338_PFD_IN_REF_NOCLK:
+ default:
+ dev_err(&client->dev, "Invalid pll source\n");
+ return -EINVAL;
+ }
+ }
+ /* check refclk source */
+ if (require_ref) {
+ switch (pdata->ref_src) {
+ case SI5338_REF_SRC_CLKIN12:
+ if (require_xtal) {
+ dev_err(&client->dev,
+ "Error in configuration: IN1/IN2 and XTAL are mutually exclusive\n");
+ return -EINVAL;
+ }
+ drvdata->pclkin[0] = devm_clk_get(&client->dev,
+ pclkin[0]);
+ if (PTR_ERR(drvdata->pclkin[0]) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ if (IS_ERR_OR_NULL(drvdata->pclkin[0])) {
+ dev_err(&client->dev,
+ "IN1/IN2 doesn't a have source\n");
+ return -EINVAL;
+ }
+ break;
+ case SI5338_REF_SRC_CLKIN3:
+ drvdata->pclkin[1] = devm_clk_get(&client->dev,
+ pclkin[1]);
+ if (PTR_ERR(drvdata->pclkin[1]) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ if (IS_ERR_OR_NULL(drvdata->pclkin[1])) {
+ dev_err(&client->dev,
+ "IN3 doesn't have a source\n");
+ return -EINVAL;
+ }
+ break;
+ default:
+ dev_err(&client->dev,
+ "Invalid source for refclk\n");
+ return -EINVAL;
+ }
+ }
+ /* check fbclk source */
+ if (require_fb) {
+ switch (pdata->fb_src) {
+ case SI5338_FB_SRC_CLKIN4:
+ drvdata->pclkin[2] = devm_clk_get(&client->dev,
+ pclkin[2]);
+ if (PTR_ERR(drvdata->pclkin[2]) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ if (IS_ERR_OR_NULL(drvdata->pclkin[2])) {
+ dev_err(&client->dev,
+ "IN4 doesn't have a source\n");
+ return -EINVAL;
+ }
+ break;
+ case SI5338_FB_SRC_CLKIN56:
+ drvdata->pclkin[3] = devm_clk_get(&client->dev,
+ pclkin[3]);
+ if (PTR_ERR(drvdata->pclkin[3]) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ if (IS_ERR_OR_NULL(drvdata->pclkin[3])) {
+ dev_err(&client->dev,
+ "IN5/IN6 doesn't have a source\n");
+ return -EINVAL;
+ }
+ break;
+ case SI5338_FB_SRC_NOCLK:
+ default:
+ dev_err(&client->dev,
+ "Invalid source for fbclk\n");
+ return -EINVAL;
+ }
+ }
+ /* check xtal */
+ if (require_xtal) {
+ drvdata->pxtal = devm_clk_get(&client->dev, "xtal");
+ if (PTR_ERR(drvdata->pxtal) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ if (IS_ERR_OR_NULL(drvdata->pxtal)) {
+ dev_err(&client->dev,
+ "XTAL doesn't have a source\n");
+ return -EINVAL;
+ }
+ }
+
+ /* Register regmap */
+ drvdata->regmap = devm_regmap_init_i2c(client, &si5338_regmap_config);
+ if (IS_ERR(drvdata->regmap)) {
+ dev_err(&client->dev, "failed to allocate register map\n");
+ return PTR_ERR(drvdata->regmap);
+ }
+
+ ret = regmap_read(drvdata->regmap, REG5338_DEV_CONFIG2, &n);
+ if (ret) {
+ dev_err(&client->dev, "Failed to access regmap\n");
+ return ret;
+ }
+
+ /* Check if si5338 exists */
+ if ((n & REG5338_DEV_CONFIG2_MASK) != REG5338_DEV_CONFIG2_VAL) {
+ dev_err(&client->dev,
+ "Chip returned unexpected value from reg 0x%x: 0x%x, expected 0x%x. It is not %s\n",
+ REG5338_DEV_CONFIG2, n, REG5338_DEV_CONFIG2_VAL,
+ id->name);
+ return -ENODEV;
+ }
+
+ dev_dbg(&client->dev, "Chip %s is found\n", id->name);
+
+ ret = pre_init(drvdata); /* Disable all */
+ if (ret)
+ return ret;
+
+ /*
+ * Set up clock structure
+ * These clocks have fixed parent
+ * xtal => xoclk
+ * refclk => divrefclk
+ * fbclk => divfbclk
+ * pll => multisynth
+ */
+
+ /* setup refclk parent */
+ ret = si5338_refclk_reparent(drvdata, pdata->ref_src);
+ if (ret) {
+ dev_err(&client->dev,
+ "failed to reparent refclk to %d\n", pdata->ref_src);
+ return ret;
+ }
+
+ /* setup fbclk parent */
+ ret = si5338_fbclk_reparent(drvdata, pdata->fb_src);
+ if (ret) {
+ dev_err(&client->dev,
+ "failed to reparent fbclk to %d\n", pdata->fb_src);
+ return ret;
+ }
+
+ /* setup pll parent */
+ ret = si5338_pll_reparent(drvdata, pdata->pll_src);
+ if (ret) {
+ dev_err(&client->dev,
+ "failed to reparent pll %d to %d\n",
+ n, pdata->pll_src);
+ return ret;
+ }
+
+ for (n = 0; n < 4; n++) {
+ ret = si5338_clkout_reparent(drvdata, n,
+ pdata->clkout[n].clkout_src);
+ if (ret) {
+ dev_err(&client->dev,
+ "failed to reparent clkout %d to %d\n",
+ n, pdata->clkout[n].clkout_src);
+ return ret;
+ }
+
+ ret = si5338_clkout_set_drive_config(drvdata, n,
+ pdata->clkout[n].drive);
+ if (ret) {
+ dev_err(&client->dev,
+ "failed set drive config of clkout%d to %s\n",
+ n, pdata->clkout[n].drive);
+ return ret;
+ }
+
+ ret = si5338_clkout_set_disable_state(drvdata, n,
+ pdata->clkout[n].disable_state);
+ if (ret) {
+ dev_err(&client->dev,
+ "failed set disable state of clkout%d to %d\n",
+ n, pdata->clkout[n].disable_state);
+ return ret;
+ }
+ }
+
+ /*
+ * To form clock names, concatentate name prefix with each name.
+ * The result string is up to MAX_NAME_LENGTH including termination.
+ */
+
+ /* Register xtal input clock */
+ if (!IS_ERR_OR_NULL(drvdata->pxtal)) {
+ strlcpy(register_name, drvdata->name_prefix, MAX_NAME_PREFIX);
+ strncat(register_name, si5338_input_names[4], STRNCAT_LENGTH);
+ drvdata->pxtal_name = __clk_get_name(drvdata->pxtal);
+ clk = si5338_register_clock(&client->dev, &drvdata->xtal,
+ register_name, &drvdata->pxtal_name, 1,
+ &si5338_xtal_ops, 0);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+ }
+
+ /* Register clkin input clock */
+ for (n = 0; n < 4; n++) {
+ if (IS_ERR_OR_NULL(drvdata->pclkin[n]))
+ continue;
+
+ drvdata->clkin[n].drvdata = drvdata;
+ drvdata->clkin[n].num = n;
+ strlcpy(register_name, drvdata->name_prefix, MAX_NAME_PREFIX);
+ strncat(register_name, si5338_input_names[n], STRNCAT_LENGTH);
+ drvdata->pclkin_name[n] = __clk_get_name(drvdata->pclkin[n]);
+
+ clk = si5338_register_clock(&client->dev,
+ &drvdata->clkin[n].hw,
+ register_name,
+ &drvdata->pclkin_name[n],
+ 1,
+ &si5338_clkin_ops,
+ 0);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+ }
+
+ /*
+ * Create unique internal names in case multiple devices exist
+ *
+ * Register refclk, parents can be in1/in2, in3, xtal, noclk
+ */
+ drvdata->refclk.drvdata = drvdata;
+ strlcpy(name_buf[0], drvdata->name_prefix, MAX_NAME_PREFIX);
+ strlcpy(name_buf[1], drvdata->name_prefix, MAX_NAME_PREFIX);
+ strlcpy(name_buf[2], drvdata->name_prefix, MAX_NAME_PREFIX);
+ strlcpy(name_buf[3], drvdata->name_prefix, MAX_NAME_PREFIX);
+ strncat(name_buf[0], si5338_input_names[0], STRNCAT_LENGTH);
+ strncat(name_buf[1], si5338_input_names[1], STRNCAT_LENGTH);
+ strncat(name_buf[2], si5338_input_names[4], STRNCAT_LENGTH);
+ strncat(name_buf[3], si5338_input_names[5], STRNCAT_LENGTH);
+ strlcpy(register_name, drvdata->name_prefix, MAX_NAME_PREFIX);
+ strncat(register_name, si5338_pll_src_names[0], STRNCAT_LENGTH);
+
+ clk = si5338_register_clock(&client->dev, &drvdata->refclk.hw,
+ register_name, parent_names, 4,
+ &si5338_refclk_ops, 0);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ /* Register divrefclk, parent is refclk */
+ strlcpy(name_buf[0], drvdata->name_prefix, MAX_NAME_PREFIX);
+ strncat(name_buf[0], si5338_pll_src_names[0], STRNCAT_LENGTH);
+ strlcpy(register_name, drvdata->name_prefix, MAX_NAME_PREFIX);
+ strncat(register_name, si5338_pll_src_names[2], STRNCAT_LENGTH);
+
+ clk = si5338_register_clock(&client->dev, &drvdata->divrefclk,
+ register_name, parent_names, 1,
+ &si5338_divrefclk_ops, 0);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ /* Register fbclk, parents can be in4, in5/in6, noclk */
+ drvdata->fbclk.drvdata = drvdata;
+ strlcpy(name_buf[0], drvdata->name_prefix, MAX_NAME_PREFIX);
+ strlcpy(name_buf[1], drvdata->name_prefix, MAX_NAME_PREFIX);
+ strlcpy(name_buf[2], drvdata->name_prefix, MAX_NAME_PREFIX);
+ strncat(name_buf[0], si5338_input_names[2], STRNCAT_LENGTH);
+ strncat(name_buf[1], si5338_input_names[3], STRNCAT_LENGTH);
+ strncat(name_buf[2], si5338_input_names[5], STRNCAT_LENGTH);
+ strlcpy(register_name, drvdata->name_prefix, MAX_NAME_PREFIX);
+ strncat(register_name, si5338_pll_src_names[1], STRNCAT_LENGTH);
+
+ clk = si5338_register_clock(&client->dev, &drvdata->fbclk.hw,
+ register_name, parent_names, 3,
+ &si5338_fbclk_ops, 0);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ /* Register divfbclk, parent is fbclk */
+ strlcpy(name_buf[0], drvdata->name_prefix, MAX_NAME_PREFIX);
+ strncat(name_buf[0], si5338_pll_src_names[1], STRNCAT_LENGTH);
+ strlcpy(register_name, drvdata->name_prefix, MAX_NAME_PREFIX);
+ strncat(register_name, si5338_pll_src_names[3], STRNCAT_LENGTH);
+
+ clk = si5338_register_clock(&client->dev, &drvdata->divfbclk,
+ register_name, parent_names, 1,
+ &si5338_divfbclk_ops, 0);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ /* register PLL */
+ drvdata->pll.drvdata = drvdata;
+ for (n = 0; n < ARRAY_SIZE(si5338_pll_src_names); n++) {
+ strlcpy(name_buf[n], drvdata->name_prefix, MAX_NAME_PREFIX);
+ strncat(name_buf[n], si5338_pll_src_names[n], STRNCAT_LENGTH);
+ }
+ strlcpy(register_name, drvdata->name_prefix, MAX_NAME_PREFIX);
+ strncat(register_name, si5338_msynth_src_names[0], STRNCAT_LENGTH);
+ clk = si5338_register_clock(&client->dev, &drvdata->pll.hw,
+ register_name, parent_names, 5,
+ &si5338_pll_ops, 0);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ /* If pll_vco is specified, always use it to set pll clock */
+ if (require_pll && pdata->pll_vco) {
+ if (pdata->pll_vco > FVCOMIN && pdata->pll_vco < FVCOMAX) {
+ dev_dbg(&client->dev, "Setting pll vco rate to %u\n",
+ pdata->pll_vco);
+ ret = clk_set_rate(clk, pdata->pll_vco);
+ if (ret) {
+ dev_err(&client->dev, "Cannot set pll vco rate : %d\n",
+ ret);
+ return ret;
+ }
+ } else {
+ pdata->pll_vco = 0;
+ }
+ }
+
+ /* register clk multisync and clk out divider */
+ drvdata->msynth = devm_kzalloc(&client->dev, 4 *
+ sizeof(*drvdata->msynth), GFP_KERNEL);
+ if (!drvdata->msynth)
+ return -ENOMEM;
+
+ drvdata->clkout = devm_kzalloc(&client->dev, 4 *
+ sizeof(*drvdata->clkout), GFP_KERNEL);
+ if (!drvdata->clkout)
+ return -ENOMEM;
+
+ drvdata->onecell.clk_num = 4;
+ drvdata->onecell.clks = devm_kzalloc(&client->dev,
+ 4 * sizeof(*drvdata->onecell.clks), GFP_KERNEL);
+
+ if (!drvdata->onecell.clks)
+ return -ENOMEM;
+
+ for (n = 0; n < 4; n++) {
+ drvdata->msynth[n].num = n;
+ drvdata->msynth[n].drvdata = drvdata;
+ strlcpy(name_buf[0], drvdata->name_prefix, MAX_NAME_PREFIX);
+ strncat(name_buf[0], si5338_msynth_src_names[0],
+ STRNCAT_LENGTH);
+ strlcpy(register_name, drvdata->name_prefix, MAX_NAME_PREFIX);
+ strncat(register_name, si5338_msynth_names[n], STRNCAT_LENGTH);
+ flags = (!pdata->pll_vco && n == pdata->pll_master) ?
+ CLK_SET_RATE_PARENT : 0;
+
+ clk = si5338_register_clock(&client->dev,
+ &drvdata->msynth[n].hw,
+ register_name,
+ parent_names,
+ 1,
+ &si5338_msynth_ops,
+ flags);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ }
+
+ /*
+ * ms0 is available for all clkout
+ * ms0/ms1/ms2/ms3 is available for each clkout respectivelly
+ */
+ for (n = 0; n < 8; n++) {
+ strlcpy(name_buf[n], drvdata->name_prefix, MAX_NAME_PREFIX);
+ strncat(name_buf[n], si5338_clkout_src_names[n],
+ STRNCAT_LENGTH);
+ }
+
+ for (n = 0; n < 4; n++) {
+ drvdata->clkout[n].num = n;
+ drvdata->clkout[n].drvdata = drvdata;
+ /*
+ * Update source
+ * ms0 for clkout0
+ * ms1 for clkout1
+ * ms2 for clkout2
+ * ms3 for clkout3
+ */
+ strlcpy(name_buf[6], drvdata->name_prefix, MAX_NAME_PREFIX);
+ strncat(name_buf[6], si5338_msynth_names[n], STRNCAT_LENGTH);
+ /*
+ * Use clkout_name from device tree or platform data ignoring
+ * name_prefix. The clkout_name must be unique for each clock.
+ */
+ if (pdata->clkout[n].name) {
+ if (strlen(pdata->clkout[n].name) >= MAX_NAME_LENGTH) {
+ dev_warn(&client->dev,
+ "clkout[%d] name %s too long\n",
+ n, pdata->clkout[n].name);
+ }
+ strlcpy(register_name, pdata->clkout[n].name,
+ MAX_NAME_LENGTH);
+ } else {
+ strlcpy(register_name, drvdata->name_prefix,
+ MAX_NAME_PREFIX);
+ strncat(register_name, si5338_clkout_names[n],
+ STRNCAT_LENGTH);
+ }
+
+ clk = si5338_register_clock(&client->dev,
+ &drvdata->clkout[n].hw,
+ register_name,
+ parent_names,
+ 8,
+ &si5338_clkout_ops,
+ CLK_SET_RATE_PARENT);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ if (register_debugfs_status(&drvdata->clkout[n])) {
+ dev_warn(&client->dev,
+ "Failed to register clkout status in debugfs\n");
+ }
+
+ drvdata->onecell.clks[n] = clk;
+
+ /* set initial clkout rate */
+ if (pdata->clkout[n].rate) {
+ dev_dbg(&client->dev, "Setting clkout%d rate to %lu\n",
+ n, pdata->clkout[n].rate);
+ ret = clk_set_rate(clk, pdata->clkout[n].rate);
+ if (ret) {
+ dev_err(&client->dev,
+ "Cannot set rate for clkout%d: %d\n",
+ n, ret);
+ return ret;
+ }
+ /* clocks need to be prepared before post init */
+ ret = clk_prepare(clk);
+ if (ret) {
+ dev_err(&client->dev,
+ "Cannot prepare clk%d\n", n);
+ return ret;
+ }
+ }
+ }
+
+ /*
+ * Important: Go through the procedure to check PLL locking
+ * and other steps required by si5338 reference manual.
+ */
+ ret = post_init(drvdata);
+ if (ret)
+ return ret;
+
+ for (n = 0; n < 4; n++) {
+ if (pdata->clkout[n].rate) {
+ if (pdata->clkout[n].enabled) {
+ ret = clk_enable(drvdata->onecell.clks[n]);
+ if (ret)
+ return ret;
+ } else {
+ clk_unprepare(drvdata->onecell.clks[n]);
+ }
+ }
+ }
+
+ dev_dbg(&client->dev, "%s clocks are registered\n", id->name);
+
+#ifdef CONFIG_OF
+ ret = of_clk_add_provider(client->dev.of_node,
+ of_clk_src_onecell_get,
+ &drvdata->onecell);
+ if (ret) {
+ dev_err(&client->dev, "unable to add clk provider\n");
+ return ret;
+ }
+#endif
+ for (n = 0; n < 4; n++) {
+ clk = drvdata->clkout[n].hw.clk;
+ drvdata->lookup[n] = clkdev_alloc(clk,
+ __clk_get_name(clk),
+ NULL);
+ if (!drvdata->lookup[n]) {
+ dev_warn(&client->dev,
+ "Unable to add clkout%d to clkdev\n", n);
+ continue;
+ }
+ if (strlen(drvdata->lookup[n]->con_id) !=
+ strlen(__clk_get_name(clk))) {
+ dev_warn(&client->dev,
+ "Warning: clkdev doesn't support name longer than %zu\n",
+ strlen(drvdata->lookup[n]->con_id));
+ }
+ clkdev_add(drvdata->lookup[n]);
+ }
+
+ return 0;
+}
+
+static int si5338_i2c_remove(struct i2c_client *client)
+{
+ struct si5338_driver_data *drvdata = i2c_get_clientdata(client);
+ int n;
+
+#ifdef CONFIG_OF
+ of_clk_del_provider(client->dev.of_node);
+#endif
+
+ for (n = 0; n < 4; n++) {
+ if (drvdata->lookup[n])
+ clkdev_drop(drvdata->lookup[n]);
+ }
+
+ dev_dbg(&client->dev, "Removed\n");
+
+ return 0;
+}
+
+
+static const struct i2c_device_id si5338_i2c_ids[] = {
+ { "si5338", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, si5338_i2c_ids);
+
+static struct i2c_driver si5338_driver = {
+ .driver = {
+ .name = "si5338",
+ .of_match_table = of_match_ptr(si5338_dt_ids),
+ },
+ .probe = si5338_i2c_probe,
+ .remove = si5338_i2c_remove,
+ .id_table = si5338_i2c_ids,
+};
+module_i2c_driver(si5338_driver);
+
+MODULE_AUTHOR("York Sun <yorksun@freescale.com");
+MODULE_DESCRIPTION("Silicon Labs Si5338 clock generator driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/dt-bindings/clock/clk-si5338.h b/include/dt-bindings/clock/clk-si5338.h
new file mode 100644
index 0000000..545c80d
--- /dev/null
+++ b/include/dt-bindings/clock/clk-si5338.h
@@ -0,0 +1,68 @@
+/*
+ * This header provides constants for SI5338 I2C clock generator
+ *
+ * The constants defined in this header are used in dts files
+ *
+ * Copyright 2015 Freescale Semiconductor
+ *
+ * York Sun <yorksun@freescale.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _DT_BINDINGS_CLK_SI5338_H
+#define _DT_BINDINGS_CLK_SI5338_H
+
+/* Used to identify input clock */
+#define SI5338_INPUT_CLK12 0
+#define SI5338_INPUT_CLK3 1
+#define SI5338_INPUT_CLK4 2
+#define SI5338_INPUT_CLK56 3
+
+/* Used to identify the mux source */
+#define SI5338_REF_SRC_CLKIN12 0
+#define SI5338_REF_SRC_CLKIN3 1
+#define SI5338_FB_SRC_CLKIN4 2
+#define SI5338_FB_SRC_CLKIN56 3
+#define SI5338_REF_SRC_XTAL 4
+#define SI5338_FB_SRC_NOCLK 5
+
+/* Used to identify the pfd_in_ref mux source */
+#define SI5338_PFD_IN_REF_REFCLK 0
+#define SI5338_PFD_IN_REF_FBCLK 1
+#define SI5338_PFD_IN_REF_DIVREFCLK 2
+#define SI5338_PFD_IN_REF_DIVFBCLK 3
+#define SI5338_PFD_IN_REF_XOCLK 4
+#define SI5338_PFD_IN_REF_NOCLK 5
+
+/* Used to identify the pfd_in_fb mux source */
+#define SI5338_PFD_IN_FB_FBCLK 0
+#define SI5338_PFD_IN_FB_REFCLK 1
+#define SI5338_PFD_IN_FB_DIVFBCLK 2
+#define SI5338_PFD_IN_FB_DIVREFCLK 3
+#define SI5338_PFD_IN_FB_RESERVED 4
+#define SI5338_PFD_IN_FB_NOCLK 5
+
+/* Used to identify the mux source */
+#define SI5338_OUT_MUX_FBCLK 0
+#define SI5338_OUT_MUX_REFCLK 1
+#define SI5338_OUT_MUX_DIVFBCLK 2
+#define SI5338_OUT_MUX_DIVREFCLK 3
+#define SI5338_OUT_MUX_XOCLK 4
+#define SI5338_OUT_MUX_MS0 5
+#define SI5338_OUT_MUX_MSN 6 /* MS0/1/2/3 respectivelly */
+#define SI5338_OUT_MUX_NOCLK 7
+
+#define SI5338_OUT_DIS_HIZ 0
+#define SI5338_OUT_DIS_LOW 1
+#define SI5338_OUT_DIS_HI 2
+#define SI5338_OUT_DIS_ALWAYS_ON 3
+
+#endif /* _DT_BINDINGS_CLK_SI5338_H */
diff --git a/include/linux/platform_data/si5338.h b/include/linux/platform_data/si5338.h
new file mode 100644
index 0000000..5422955
--- /dev/null
+++ b/include/linux/platform_data/si5338.h
@@ -0,0 +1,48 @@
+/*
+ * Si5338A/B/C programmable clock generator platform_data.
+ */
+
+#ifndef __LINUX_PLATFORM_DATA_SI5338_H__
+#define __LINUX_PLATFORM_DATA_SI5338_H__
+
+struct clk;
+
+/*
+ * struct si5338_clkout_config - Si5338 clock output configuration
+ * @name: clkout name. If omitted, clkout0/1/2/3 with name_prefix will be used
+ * @clkout_src: clkout source clock
+ * @drive: output drive strength
+ * @rate: initial clkout rate, or default if 0
+ * @enabled: output enabled by default
+ */
+struct si5338_clkout_config {
+ const char *name;
+ u8 clkout_src;
+ const char *drive;
+ u8 disable_state;
+ unsigned long rate;
+ bool enabled;
+};
+
+/*
+ * struct si5338_platform_data - Platform data for the Si5338 clock driver
+ * @name_prefix: prefix to clock names
+ * In case multiple clock chips exist, each can have unique names
+ * @ref_src: reference clock source
+ * @fb_src: feedback clock source
+ * @pll_src: array of pll source clock setting
+ * @pll_master: index of MS (1 of 4) which can change pll clock
+ * @pll_vco: set pll vco clock. If this is set, pll_master is ignored
+ * @clkout: array of clkout configuration
+ */
+struct si5338_platform_data {
+ const char *name_prefix;
+ u8 ref_src;
+ u8 fb_src;
+ u8 pll_src;
+ u8 pll_master;
+ u32 pll_vco;
+ struct si5338_clkout_config clkout[4];
+};
+
+#endif
--
2.7.4