[PATCH 2/2] clk: Renesas versaclock7 ccf device driver

Alex Helms
2022-09-12T18:39:16Z

Renesas Versaclock7 is a family of configurable clock generator ICs
with fractional and integer dividers. This driver has basic support
for the RC21008A device, a clock synthesizer with a crystal input and
8 outputs. The supports changing the FOD and IOD rates, and each
output can be gated.

Signed-off-by: Alex Helms <alexander.helms.jy@renesas.com>
---
MAINTAINERS | 1 +
drivers/clk/Kconfig | 9 +
drivers/clk/Makefile | 1 +
drivers/clk/clk-versaclock7.c | 1292 +++++++++++++++++++++++++++++++++
4 files changed, 1303 insertions(+)
create mode 100755 drivers/clk/clk-versaclock7.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 8a23ea619..123e07900 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -16540,6 +16540,7 @@ RENESAS VERSACLOCK 7 CLOCK DRIVER
M: Alex Helms <alexander.helms.jy@renesas.com>
S: Maintained
F: Documentation/devicetree/bindings/clock/renesas,versaclock7.yaml
+F: drivers/clk/clk-versaclock7.c

RESET CONTROLLER FRAMEWORK
M: Philipp Zabel <p.zabel@pengutronix.de>
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index d4d67fbae..efb85eada 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -351,6 +351,15 @@ config COMMON_CLK_VC5
This driver supports the IDT VersaClock 5 and VersaClock 6
programmable clock generators.

+config COMMON_CLK_VC7
+ tristate "Clock driver for Renesas Versaclock 7 devices"
+ depends on I2C
+ depends on OF
+ select REGMAP_I2C
+ help
+ Renesas Versaclock7 is a family of configurable clock generator
+ and jitter attenuator ICs with fractional and integer dividers.
+
config COMMON_CLK_STM32MP157
def_bool COMMON_CLK && MACH_STM32MP157
help
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 16e588630..e749ae1df 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -68,6 +68,7 @@ obj-$(CONFIG_COMMON_CLK_TPS68470) += clk-tps68470.o
obj-$(CONFIG_CLK_TWL6040) += clk-twl6040.o
obj-$(CONFIG_ARCH_VT8500) += clk-vt8500.o
obj-$(CONFIG_COMMON_CLK_VC5) += clk-versaclock5.o
+obj-$(CONFIG_COMMON_CLK_VC7) += clk-versaclock7.o
obj-$(CONFIG_COMMON_CLK_WM831X) += clk-wm831x.o
obj-$(CONFIG_COMMON_CLK_XGENE) += clk-xgene.o

diff --git a/drivers/clk/clk-versaclock7.c b/drivers/clk/clk-versaclock7.c
new file mode 100755
index 000000000..6dd6cec41
--- /dev/null
+++ b/drivers/clk/clk-versaclock7.c
@@ -0,0 +1,1292 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Common clock framework driver for the Versaclock7 family of timing devices.
+ *
+ * Copyright (c) 2022 Renesas Electronics Corporation
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/i2c.h>
+#include <linux/math64.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/regmap.h>
+#include <linux/swab.h>
+
+/*
+ * 16-bit register address: the lower 8 bits of the register address come
+ * from the offset addr byte and the upper 8 bits come from the page register.
+ */
+#define VC7_PAGE_ADDR 0xFD
+#define VC7_PAGE_WINDOW 256
+#define VC7_MAX_REG 0x364
+
+/* Maximum number of banks supported by VC7 */
+#define VC7_NUM_BANKS 7
+
+/* Maximum number of FODs supported by VC7 */
+#define VC7_NUM_FOD 3
+
+/* Maximum number of IODs supported by VC7 */
+#define VC7_NUM_IOD 4
+
+/* Maximum number of outputs supported by VC7 */
+#define VC7_NUM_OUT 12
+
+/* VCO valid range is 9.5 GHz to 10.7 GHz */
+#define VC7_APLL_VCO_MIN 9500000000UL
+#define VC7_APLL_VCO_MAX 10700000000UL
+
+/* APLL denominator is fixed at 2^27 */
+#define VC7_APLL_DENOMINATOR_BITS 27
+
+/* FOD 1st stage denominator is fixed 2^34 */
+#define VC7_FOD_DENOMINATOR_BITS 34
+
+/* IOD can operate between 1kHz and 650MHz */
+#define VC7_IOD_RATE_MIN 1000UL
+#define VC7_IOD_RATE_MAX 650000000UL
+#define VC7_IOD_MIN_DIVISOR 14
+#define VC7_IOD_MAX_DIVISOR 0x1ffffff /* 25-bit */
+
+#define VC7_FOD_RATE_MIN 1000UL
+#define VC7_FOD_RATE_MAX 650000000UL
+#define VC7_FOD_1ST_STAGE_RATE_MIN 33000000UL /* 33 MHz */
+#define VC7_FOD_1ST_STAGE_RATE_MAX 650000000UL /* 650 MHz */
+#define VC7_FOD_1ST_INT_MAX 324
+#define VC7_FOD_2ND_INT_MIN 2
+#define VC7_FOD_2ND_INT_MAX 0x1ffff /* 17-bit */
+
+/* VC7 Registers */
+
+#define VC7_REG_XO_CNFG 0x2C
+#define VC7_REG_XO_CNFG_COUNT 4
+#define VC7_REG_XO_IB_H_DIV_SHIFT 24
+#define VC7_REG_XO_IB_H_DIV_MASK GENMASK(28, VC7_REG_XO_IB_H_DIV_SHIFT)
+
+#define VC7_REG_APLL_FB_DIV_FRAC 0x120
+#define VC7_REG_APLL_FB_DIV_FRAC_COUNT 4
+#define VC7_REG_APLL_FB_DIV_FRAC_MASK GENMASK(26, 0)
+
+#define VC7_REG_APLL_FB_DIV_INT 0x124
+#define VC7_REG_APLL_FB_DIV_INT_COUNT 2
+#define VC7_REG_APLL_FB_DIV_INT_MASK GENMASK(9, 0)
+
+#define VC7_REG_APLL_CNFG 0x127
+#define VC7_REG_APLL_EN_DOUBLER BIT(0)
+
+#define VC7_REG_OUT_BANK_CNFG(idx) (0x280 + (0x4 * (idx)))
+#define VC7_REG_OUTPUT_BANK_SRC_MASK GENMASK(2, 0)
+
+#define VC7_REG_FOD_INT_CNFG(idx) (0x1E0 + (0x10 * (idx)))
+#define VC7_REG_FOD_INT_CNFG_COUNT 8
+#define VC7_REG_FOD_1ST_INT_MASK GENMASK(8, 0)
+#define VC7_REG_FOD_2ND_INT_SHIFT 9
+#define VC7_REG_FOD_2ND_INT_MASK GENMASK(25, VC7_REG_FOD_2ND_INT_SHIFT)
+#define VC7_REG_FOD_FRAC_SHIFT 26
+#define VC7_REG_FOD_FRAC_MASK GENMASK_ULL(59, VC7_REG_FOD_FRAC_SHIFT)
+
+#define VC7_REG_IOD_INT_CNFG(idx) (0x1C0 + (0x8 * (idx)))
+#define VC7_REG_IOD_INT_CNFG_COUNT 4
+#define VC7_REG_IOD_INT_MASK GENMASK(24, 0)
+
+#define VC7_REG_ODRV_EN(idx) (0x240 + (0x4 * (idx)))
+#define VC7_REG_OUT_DIS BIT(0)
+
+struct vc7_driver_data;
+static const struct regmap_config vc7_regmap_config;
+
+/* Supported Renesas VC7 models */
+enum vc7_model {
+ VC7_RC21008A,
+};
+
+struct vc7_chip_info {
+ const enum vc7_model model;
+ const unsigned int banks[VC7_NUM_BANKS];
+ const unsigned int num_banks;
+ const unsigned int outputs[VC7_NUM_OUT];
+ const unsigned int num_outputs;
+};
+
+/*
+ * Changing the APLL frequency is currently not supported.
+ * The APLL will consist of an opaque block between the XO and FOD/IODs and
+ * its frequency will be computed based on the current state of the device.
+ */
+struct vc7_apll_data {
+ struct clk *clk;
+ struct vc7_driver_data *vc7;
+ u8 xo_ib_h_div;
+ u8 en_doubler;
+ u16 apll_fb_div_int;
+ u32 apll_fb_div_frac;
+};
+
+struct vc7_fod_data {
+ struct clk_hw hw;
+ struct vc7_driver_data *vc7;
+ unsigned int num;
+ u32 fod_1st_int;
+ u32 fod_2nd_int;
+ u64 fod_frac;
+};
+
+struct vc7_iod_data {
+ struct clk_hw hw;
+ struct vc7_driver_data *vc7;
+ unsigned int num;
+ u32 iod_int;
+};
+
+struct vc7_out_data {
+ struct clk_hw hw;
+ struct vc7_driver_data *vc7;
+ unsigned int num;
+ unsigned int out_dis;
+};
+
+struct vc7_driver_data {
+ struct i2c_client *client;
+ struct regmap *regmap;
+ const struct vc7_chip_info *chip_info;
+
+ struct clk *pin_xin;
+ struct vc7_apll_data clk_apll;
+ struct vc7_fod_data clk_fod[VC7_NUM_FOD];
+ struct vc7_iod_data clk_iod[VC7_NUM_IOD];
+ struct vc7_out_data clk_out[VC7_NUM_OUT];
+};
+
+struct vc7_bank_src_map {
+ enum vc7_bank_src_type {
+ VC7_FOD,
+ VC7_IOD,
+ } type;
+ union _divider {
+ struct vc7_iod_data *iod;
+ struct vc7_fod_data *fod;
+ } src;
+};
+
+static struct clk_hw *vc7_of_clk_get(struct of_phandle_args *clkspec,
+ void *data)
+{
+ struct vc7_driver_data *vc7 = data;
+ unsigned int idx = clkspec->args[0];
+
+ if (idx >= vc7->chip_info->num_outputs)
+ return ERR_PTR(-EINVAL);
+
+ return &vc7->clk_out[idx].hw;
+}
+
+static const unsigned int RC21008A_index_to_output_mapping[] = {
+ 1, 2, 3, 6, 7, 8, 10, 11
+};
+
+static int vc7_map_index_to_output(const enum vc7_model model, const unsigned int i)
+{
+ switch (model) {
+ case VC7_RC21008A:
+ return RC21008A_index_to_output_mapping[i];
+ default:
+ return i;
+ }
+}
+
+/* bank to output mapping, same across all variants */
+static const unsigned int output_bank_mapping[] = {
+ 0, /* Output 0 */
+ 1, /* Output 1 */
+ 2, /* Output 2 */
+ 2, /* Output 3 */
+ 3, /* Output 4 */
+ 3, /* Output 5 */
+ 3, /* Output 6 */
+ 3, /* Output 7 */
+ 4, /* Output 8 */
+ 4, /* Output 9 */
+ 5, /* Output 10 */
+ 6 /* Output 11 */
+};
+
+/**
+ * vc7_64_mul_64_to_128() - Multiply two u64 and return an unsigned 128-bit integer
+ * as an upper and lower part.
+ *
+ * @left: The left argument.
+ * @right: The right argument.
+ * @hi: The upper 64-bits of the 128-bit product.
+ * @lo: The lower 64-bits of the 128-bit product.
+ *
+ * From mul_64_64 in crypto/ecc.c:350 in the linux kernel, accessed in v5.17.2.
+ */
+static void vc7_64_mul_64_to_128(u64 left, u64 right, u64 *hi, u64 *lo)
+{
+ u64 a0 = left & 0xffffffffull;
+ u64 a1 = left >> 32;
+ u64 b0 = right & 0xffffffffull;
+ u64 b1 = right >> 32;
+ u64 m0 = a0 * b0;
+ u64 m1 = a0 * b1;
+ u64 m2 = a1 * b0;
+ u64 m3 = a1 * b1;
+
+ m2 += (m0 >> 32);
+ m2 += m1;
+
+ /* Overflow */
+ if (m2 < m1)
+ m3 += 0x100000000ull;
+
+ *lo = (m0 & 0xffffffffull) | (m2 << 32);
+ *hi = m3 + (m2 >> 32);
+}
+
+/**
+ * vc7_128_div_64_to_64() - Divides a 128-bit uint by a 64-bit divisor, return a 64-bit quotient.
+ *
+ * @numhi: The uppper 64-bits of the dividend.
+ * @numlo: The lower 64-bits of the dividend.
+ * @den: The denominator (divisor).
+ * @r: The remainder, pass NULL if the remainder is not needed.
+ *
+ * Originally from libdivide, modified to use kernel u64/u32 types.
+ *
+ * See https://github.com/ridiculousfish/libdivide/blob/master/libdivide.h#L471.
+ *
+ * Return: The 64-bit quotient of the division.
+ *
+ * In case of overflow of division by zero, max(u64) is returned.
+ */
+static u64 vc7_128_div_64_to_64(u64 numhi, u64 numlo, u64 den, u64 *r)
+{
+ // We work in base 2**32.
+ // A uint32 holds a single digit. A uint64 holds two digits.
+ // Our numerator is conceptually [num3, num2, num1, num0].
+ // Our denominator is [den1, den0].
+ const u64 b = ((u64)1 << 32);
+
+ // The high and low digits of our computed quotient.
+ u32 q1, q0;
+
+ // The normalization shift factor
+ int shift;
+
+ // The high and low digits of our denominator (after normalizing).
+ // Also the low 2 digits of our numerator (after normalizing).
+ u32 den1, den0, num1, num0;
+
+ // A partial remainder;
+ u64 rem;
+
+ // The estimated quotient, and its corresponding remainder (unrelated to true remainder).
+ u64 qhat, rhat;
+
+ // Variables used to correct the estimated quotient.
+ u64 c1, c2;
+
+ // Check for overflow and divide by 0.
+ if (numhi >= den) {
+ if (r)
+ *r = ~0ull;
+ return ~0ull;
+ }
+
+ // Determine the normalization factor. We multiply den by this, so that its leading digit
+ // is at least half b. In binary this means just shifting left by the number of leading
+ // zeros, so that there's a 1 in the MSB.
+ // We also shift numer by the same amount. This cannot overflow because numhi < den.
+ // The expression (-shift & 63) is the same as (64 - shift), except it avoids the UB of
+ // shifting by 64. The funny bitwise 'and' ensures that numlo does not get shifted into
+ // numhi if shift is 0. clang 11 has an x86 codegen bug here: see LLVM bug 50118.
+ // The sequence below avoids it.
+ shift = __builtin_clzll(den);
+ den <<= shift;
+ numhi <<= shift;
+ numhi |= (numlo >> (-shift & 63)) & (-(s64)shift >> 63);
+ numlo <<= shift;
+
+ // Extract the low digits of the numerator and both digits of the denominator.
+ num1 = (u32)(numlo >> 32);
+ num0 = (u32)(numlo & 0xFFFFFFFFu);
+ den1 = (u32)(den >> 32);
+ den0 = (u32)(den & 0xFFFFFFFFu);
+
+ // We wish to compute q1 = [n3 n2 n1] / [d1 d0].
+ // Estimate q1 as [n3 n2] / [d1], and then correct it.
+ // Note while qhat may be 2 digits, q1 is always 1 digit.
+ qhat = div64_u64_rem(numhi, den1, &rhat);
+ c1 = qhat * den0;
+ c2 = rhat * b + num1;
+ if (c1 > c2)
+ qhat -= (c1 - c2 > den) ? 2 : 1;
+ q1 = (u32)qhat;
+
+ // Compute the true (partial) remainder.
+ rem = numhi * b + num1 - q1 * den;
+
+ // We wish to compute q0 = [rem1 rem0 n0] / [d1 d0].
+ // Estimate q0 as [rem1 rem0] / [d1] and correct it.
+ qhat = div64_u64_rem(rem, den1, &rhat);
+ c1 = qhat * den0;
+ c2 = rhat * b + num0;
+ if (c1 > c2)
+ qhat -= (c1 - c2 > den) ? 2 : 1;
+ q0 = (u32)qhat;
+
+ // Return remainder if requested.
+ if (r)
+ *r = (rem * b + num0 - q0 * den) >> shift;
+ return ((u64)q1 << 32) | q0;
+}
+
+static int vc7_get_bank_clk(struct vc7_driver_data *vc7,
+ unsigned int bank_idx,
+ unsigned int output_bank_src,
+ struct vc7_bank_src_map *map)
+{
+ /* Mapping from Table 38 in datasheet */
+ if (bank_idx == 0 || bank_idx == 1) {
+ switch (output_bank_src) {
+ case 0:
+ map->type = VC7_IOD,
+ map->src.iod = &vc7->clk_iod[0];
+ return 0;
+ case 1:
+ map->type = VC7_IOD,
+ map->src.iod = &vc7->clk_iod[1];
+ return 0;
+ case 4:
+ map->type = VC7_FOD,
+ map->src.fod = &vc7->clk_fod[0];
+ return 0;
+ case 5:
+ map->type = VC7_FOD,
+ map->src.fod = &vc7->clk_fod[1];
+ return 0;
+ default:
+ break;
+ }
+ } else if (bank_idx == 2) {
+ switch (output_bank_src) {
+ case 1:
+ map->type = VC7_IOD,
+ map->src.iod = &vc7->clk_iod[1];
+ return 0;
+ case 4:
+ map->type = VC7_FOD,
+ map->src.fod = &vc7->clk_fod[0];
+ return 0;
+ case 5:
+ map->type = VC7_FOD,
+ map->src.fod = &vc7->clk_fod[1];
+ return 0;
+ default:
+ break;
+ }
+ } else if (bank_idx == 3) {
+ switch (output_bank_src) {
+ case 4:
+ map->type = VC7_FOD,
+ map->src.fod = &vc7->clk_fod[0];
+ return 0;
+ case 5:
+ map->type = VC7_FOD,
+ map->src.fod = &vc7->clk_fod[1];
+ return 0;
+ case 6:
+ map->type = VC7_FOD,
+ map->src.fod = &vc7->clk_fod[2];
+ return 0;
+ default:
+ break;
+ }
+ } else if (bank_idx == 4) {
+ switch (output_bank_src) {
+ case 0:
+ /* CLKIN1 not supported in this driver */
+ break;
+ case 2:
+ map->type = VC7_IOD,
+ map->src.iod = &vc7->clk_iod[2];
+ return 0;
+ case 5:
+ map->type = VC7_FOD,
+ map->src.fod = &vc7->clk_fod[1];
+ return 0;
+ case 6:
+ map->type = VC7_FOD,
+ map->src.fod = &vc7->clk_fod[2];
+ return 0;
+ case 7:
+ /* CLKIN0 not supported in this driver */
+ break;
+ default:
+ break;
+ }
+ } else if (bank_idx == 5) {
+ switch (output_bank_src) {
+ case 0:
+ /* CLKIN1 not supported in this driver */
+ break;
+ case 1:
+ /* XIN_REFIN not supported in this driver */
+ break;
+ case 2:
+ map->type = VC7_IOD,
+ map->src.iod = &vc7->clk_iod[2];
+ return 0;
+ case 3:
+ map->type = VC7_IOD,
+ map->src.iod = &vc7->clk_iod[3];
+ return 0;
+ case 5:
+ map->type = VC7_FOD,
+ map->src.fod = &vc7->clk_fod[1];
+ return 0;
+ case 6:
+ map->type = VC7_FOD,
+ map->src.fod = &vc7->clk_fod[2];
+ return 0;
+ case 7:
+ /* CLKIN0 not supported in this driver */
+ break;
+ default:
+ break;
+ }
+ } else if (bank_idx == 6) {
+ switch (output_bank_src) {
+ case 0:
+ /* CLKIN1 not supported in this driver */
+ break;
+ case 2:
+ map->type = VC7_IOD,
+ map->src.iod = &vc7->clk_iod[2];
+ return 0;
+ case 3:
+ map->type = VC7_IOD,
+ map->src.iod = &vc7->clk_iod[3];
+ return 0;
+ case 5:
+ map->type = VC7_FOD,
+ map->src.fod = &vc7->clk_fod[1];
+ return 0;
+ case 6:
+ map->type = VC7_FOD,
+ map->src.fod = &vc7->clk_fod[2];
+ return 0;
+ case 7:
+ /* CLKIN0 not supported in this driver */
+ break;
+ default:
+ break;
+ }
+ }
+
+ pr_warn("bank_src%d = %d is not supported\n", bank_idx, output_bank_src);
+ return -1;
+}
+
+static int vc7_read_apll(struct vc7_driver_data *vc7)
+{
+ int err;
+ u32 val32;
+ u16 val16;
+
+ err = regmap_bulk_read(vc7->regmap,
+ VC7_REG_XO_CNFG,
+ (u32 *)&val32,
+ VC7_REG_XO_CNFG_COUNT);
+ if (err) {
+ dev_err(&vc7->client->dev, "failed to read XO_CNFG\n");
+ return err;
+ }
+
+ vc7->clk_apll.xo_ib_h_div = (val32 & VC7_REG_XO_IB_H_DIV_MASK)
+ >> VC7_REG_XO_IB_H_DIV_SHIFT;
+
+ err = regmap_read(vc7->regmap,
+ VC7_REG_APLL_CNFG,
+ &val32);
+ if (err) {
+ dev_err(&vc7->client->dev, "failed to read APLL_CNFG\n");
+ return err;
+ }
+
+ vc7->clk_apll.en_doubler = val32 & VC7_REG_APLL_EN_DOUBLER;
+
+ err = regmap_bulk_read(vc7->regmap,
+ VC7_REG_APLL_FB_DIV_FRAC,
+ (u32 *)&val32,
+ VC7_REG_APLL_FB_DIV_FRAC_COUNT);
+ if (err) {
+ dev_err(&vc7->client->dev, "failed to read APLL_FB_DIV_FRAC\n");
+ return err;
+ }
+
+ vc7->clk_apll.apll_fb_div_frac = val32 & VC7_REG_APLL_FB_DIV_FRAC_MASK;
+
+ err = regmap_bulk_read(vc7->regmap,
+ VC7_REG_APLL_FB_DIV_INT,
+ (u16 *)&val16,
+ VC7_REG_APLL_FB_DIV_INT_COUNT);
+ if (err) {
+ dev_err(&vc7->client->dev, "failed to read APLL_FB_DIV_INT\n");
+ return err;
+ }
+
+ vc7->clk_apll.apll_fb_div_int = val16 & VC7_REG_APLL_FB_DIV_INT_MASK;
+
+ return 0;
+}
+
+static int vc7_read_fod(struct vc7_driver_data *vc7, unsigned int idx)
+{
+ int err;
+ u64 val;
+
+ err = regmap_bulk_read(vc7->regmap,
+ VC7_REG_FOD_INT_CNFG(idx),
+ (u64 *)&val,
+ VC7_REG_FOD_INT_CNFG_COUNT);
+ if (err) {
+ dev_err(&vc7->client->dev, "failed to read FOD%d\n", idx);
+ return err;
+ }
+
+ vc7->clk_fod[idx].fod_1st_int = (val & VC7_REG_FOD_1ST_INT_MASK);
+ vc7->clk_fod[idx].fod_2nd_int =
+ (val & VC7_REG_FOD_2ND_INT_MASK) >> VC7_REG_FOD_2ND_INT_SHIFT;
+ vc7->clk_fod[idx].fod_frac = (val & VC7_REG_FOD_FRAC_MASK)
+ >> VC7_REG_FOD_FRAC_SHIFT;
+
+ return 0;
+}
+
+static int vc7_write_fod(struct vc7_driver_data *vc7, unsigned int idx)
+{
+ int err;
+ u64 val;
+
+ /*
+ * FOD dividers are part of an atomic group where fod_1st_int,
+ * fod_2nd_int, and fod_frac must be written together. The new divider
+ * is applied when the MSB of fod_frac is written.
+ */
+
+ err = regmap_bulk_read(vc7->regmap,
+ VC7_REG_FOD_INT_CNFG(idx),
+ (u64 *)&val,
+ VC7_REG_FOD_INT_CNFG_COUNT);
+ if (err) {
+ dev_err(&vc7->client->dev, "failed to read FOD%d\n", idx);
+ return err;
+ }
+
+ val = u64_replace_bits(val,
+ vc7->clk_fod[idx].fod_1st_int,
+ VC7_REG_FOD_1ST_INT_MASK);
+ val = u64_replace_bits(val,
+ vc7->clk_fod[idx].fod_2nd_int,
+ VC7_REG_FOD_2ND_INT_MASK);
+ val = u64_replace_bits(val,
+ vc7->clk_fod[idx].fod_frac,
+ VC7_REG_FOD_FRAC_MASK);
+
+ err = regmap_bulk_write(vc7->regmap,
+ VC7_REG_FOD_INT_CNFG(idx),
+ (u64 *)&val,
+ sizeof(u64));
+ if (err) {
+ dev_err(&vc7->client->dev, "failed to write FOD%d\n", idx);
+ return err;
+ }
+
+ return 0;
+}
+
+static int vc7_read_iod(struct vc7_driver_data *vc7, unsigned int idx)
+{
+ int err;
+ u32 val;
+
+ err = regmap_bulk_read(vc7->regmap,
+ VC7_REG_IOD_INT_CNFG(idx),
+ (u32 *)&val,
+ VC7_REG_IOD_INT_CNFG_COUNT);
+ if (err) {
+ dev_err(&vc7->client->dev, "failed to read IOD%d\n", idx);
+ return err;
+ }
+
+ vc7->clk_iod[idx].iod_int = (val & VC7_REG_IOD_INT_MASK);
+
+ return 0;
+}
+
+static int vc7_write_iod(struct vc7_driver_data *vc7, unsigned int idx)
+{
+ int err;
+ u32 val;
+
+ /*
+ * IOD divider field is atomic and all bits must be written.
+ * The new divider is applied when the MSB of iod_int is written.
+ */
+
+ err = regmap_bulk_read(vc7->regmap,
+ VC7_REG_IOD_INT_CNFG(idx),
+ (u32 *)&val,
+ VC7_REG_IOD_INT_CNFG_COUNT);
+ if (err) {
+ dev_err(&vc7->client->dev, "failed to read IOD%d\n", idx);
+ return err;
+ }
+
+ val = u32_replace_bits(val,
+ vc7->clk_iod[idx].iod_int,
+ VC7_REG_IOD_INT_MASK);
+
+ err = regmap_bulk_write(vc7->regmap,
+ VC7_REG_IOD_INT_CNFG(idx),
+ (u32 *)&val,
+ sizeof(u32));
+ if (err) {
+ dev_err(&vc7->client->dev, "failed to write IOD%d\n", idx);
+ return err;
+ }
+
+ return 0;
+}
+
+static int vc7_read_output(struct vc7_driver_data *vc7, unsigned int idx)
+{
+ int err;
+ unsigned int val, out_num;
+
+ out_num = vc7_map_index_to_output(vc7->chip_info->model, idx);
+ err = regmap_read(vc7->regmap,
+ VC7_REG_ODRV_EN(out_num),
+ &val);
+ if (err) {
+ dev_err(&vc7->client->dev, "failed to read ODRV_EN[%d]\n", idx);
+ return err;
+ }
+
+ vc7->clk_out[idx].out_dis = val & VC7_REG_OUT_DIS;
+
+ return 0;
+}
+
+static int vc7_write_output(struct vc7_driver_data *vc7, unsigned int idx)
+{
+ int err;
+ unsigned int out_num;
+
+ out_num = vc7_map_index_to_output(vc7->chip_info->model, idx);
+ err = regmap_write_bits(vc7->regmap,
+ VC7_REG_ODRV_EN(out_num),
+ VC7_REG_OUT_DIS,
+ vc7->clk_out[idx].out_dis);
+
+ if (err) {
+ dev_err(&vc7->client->dev, "failed to write ODRV_EN[%d]\n", idx);
+ return err;
+ }
+
+ return 0;
+}
+
+static unsigned long vc7_get_apll_rate(struct vc7_driver_data *vc7)
+{
+ int err;
+ unsigned long xtal_rate;
+ u64 refin_div, apll_rate;
+
+ xtal_rate = clk_get_rate(vc7->pin_xin);
+ err = vc7_read_apll(vc7);
+ if (err) {
+ dev_err(&vc7->client->dev, "unable to read apll\n");
+ return err;
+ }
+
+ /* 0 is bypassed, 1 is reserved */
+ if (vc7->clk_apll.xo_ib_h_div < 2)
+ refin_div = xtal_rate;
+ else
+ refin_div = div64_u64(xtal_rate, vc7->clk_apll.xo_ib_h_div);
+
+ if (vc7->clk_apll.en_doubler)
+ refin_div *= 2;
+
+ /* divider = int + (frac / 2^27) */
+ apll_rate = (refin_div * vc7->clk_apll.apll_fb_div_int) +
+ ((refin_div * vc7->clk_apll.apll_fb_div_frac) >> VC7_APLL_DENOMINATOR_BITS);
+
+ pr_debug("%s - xo_ib_h_div: %u, apll_fb_div_int: %u, apll_fb_div_frac: %u\n",
+ __func__, vc7->clk_apll.xo_ib_h_div, vc7->clk_apll.apll_fb_div_int,
+ vc7->clk_apll.apll_fb_div_frac);
+ pr_debug("%s - refin_div: %llu, apll rate: %llu\n",
+ __func__, refin_div, apll_rate);
+
+ return apll_rate;
+}
+
+static void vc7_calc_iod_divider(unsigned long rate, unsigned long parent_rate,
+ u32 *divider)
+{
+ *divider = DIV_ROUND_UP(parent_rate, rate);
+ if (*divider < VC7_IOD_MIN_DIVISOR)
+ *divider = VC7_IOD_MIN_DIVISOR;
+ if (*divider > VC7_IOD_MAX_DIVISOR)
+ *divider = VC7_IOD_MAX_DIVISOR;
+}
+
+static void vc7_calc_fod_1st_stage(unsigned long rate, unsigned long parent_rate,
+ u32 *div_int, u64 *div_frac)
+{
+ u64 rem;
+
+ *div_int = (u32)div64_u64_rem(parent_rate, rate, &rem);
+ *div_frac = div64_u64(rem << VC7_FOD_DENOMINATOR_BITS, rate);
+}
+
+static unsigned long vc7_calc_fod_1st_stage_rate(unsigned long parent_rate,
+ u32 fod_1st_int, u64 fod_frac)
+{
+ u64 numer, denom, hi, lo, divisor;
+
+ numer = fod_frac;
+ denom = BIT_ULL(VC7_FOD_DENOMINATOR_BITS);
+
+ if (fod_frac) {
+ vc7_64_mul_64_to_128(parent_rate, denom, &hi, &lo);
+ divisor = ((u64)fod_1st_int * denom) + numer;
+ return vc7_128_div_64_to_64(hi, lo, divisor, NULL);
+ }
+
+ return div64_u64(parent_rate, fod_1st_int);
+}
+
+static unsigned long vc7_calc_fod_2nd_stage_rate(unsigned long parent_rate,
+ u32 fod_1st_int, u32 fod_2nd_int, u64 fod_frac)
+{
+ unsigned long fod_1st_stage_rate;
+
+ fod_1st_stage_rate = vc7_calc_fod_1st_stage_rate(parent_rate, fod_1st_int, fod_frac);
+
+ if (fod_2nd_int < 2)
+ return fod_1st_stage_rate;
+
+ /*
+ * There is a div-by-2 preceding the 2nd stage integer divider
+ * (not shown on block diagram) so the actual 2nd stage integer
+ * divisor is 2 * N.
+ */
+ return div64_u64(fod_1st_stage_rate >> 1, fod_2nd_int);
+}
+
+static void vc7_calc_fod_divider(unsigned long rate, unsigned long parent_rate,
+ u32 *fod_1st_int, u32 *fod_2nd_int, u64 *fod_frac)
+{
+ unsigned int allow_frac, i, best_frac_i;
+ unsigned long first_stage_rate;
+
+ vc7_calc_fod_1st_stage(rate, parent_rate, fod_1st_int, fod_frac);
+ first_stage_rate = vc7_calc_fod_1st_stage_rate(parent_rate, *fod_1st_int, *fod_frac);
+
+ *fod_2nd_int = 0;
+
+ /* Do we need the second stage integer divider? */
+ if (first_stage_rate < VC7_FOD_1ST_STAGE_RATE_MIN) {
+ allow_frac = 0;
+ best_frac_i = VC7_FOD_2ND_INT_MIN;
+
+ for (i = VC7_FOD_2ND_INT_MIN; i <= VC7_FOD_2ND_INT_MAX; i++) {
+ /*
+ * 1) There is a div-by-2 preceding the 2nd stage integer divider
+ * (not shown on block diagram) so the actual 2nd stage integer
+ * divisor is 2 * N.
+ * 2) Attempt to find an integer solution first. This means stepping
+ * through each 2nd stage integer and recalculating the 1st stage
+ * until the 1st stage frequency is out of bounds. If no integer
+ * solution is found, use the best fractional solution.
+ */
+ vc7_calc_fod_1st_stage(parent_rate, rate * 2 * i, fod_1st_int, fod_frac);
+ first_stage_rate = vc7_calc_fod_1st_stage_rate(parent_rate,
+ *fod_1st_int,
+ *fod_frac);
+
+ /* Remember the first viable fractional solution */
+ if (best_frac_i == VC7_FOD_2ND_INT_MIN &&
+ first_stage_rate > VC7_FOD_1ST_STAGE_RATE_MIN) {
+ best_frac_i = i;
+ }
+
+ /* Is the divider viable? Prefer integer solutions over fractional. */
+ if (*fod_1st_int < VC7_FOD_1ST_INT_MAX &&
+ first_stage_rate >= VC7_FOD_1ST_STAGE_RATE_MIN &&
+ (allow_frac || *fod_frac == 0)) {
+ *fod_2nd_int = i;
+ break;
+ }
+
+ /* Ran out of divisors or the 1st stage frequency is out of range */
+ if (i >= VC7_FOD_2ND_INT_MAX ||
+ first_stage_rate > VC7_FOD_1ST_STAGE_RATE_MAX) {
+ allow_frac = 1;
+ i = best_frac_i;
+
+ /* Restore the best frac and rerun the loop for the last time */
+ if (best_frac_i != VC7_FOD_2ND_INT_MIN)
+ i--;
+
+ continue;
+ }
+ }
+ }
+}
+
+static unsigned long vc7_fod_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
+{
+ struct vc7_fod_data *fod = container_of(hw, struct vc7_fod_data, hw);
+ struct vc7_driver_data *vc7 = fod->vc7;
+ int err;
+ unsigned long fod_rate;
+
+ err = vc7_read_fod(vc7, fod->num);
+ if (err) {
+ dev_err(&vc7->client->dev, "error reading registers for %s\n",
+ clk_hw_get_name(hw));
+ return err;
+ }
+
+ pr_debug("%s - %s: parent_rate: %lu\n", __func__, clk_hw_get_name(hw), parent_rate);
+
+ fod_rate = vc7_calc_fod_2nd_stage_rate(parent_rate, fod->fod_1st_int,
+ fod->fod_2nd_int, fod->fod_frac);
+
+ pr_debug("%s - %s: fod_1st_int: %u, fod_2nd_int: %u, fod_frac: %llu\n",
+ __func__, clk_hw_get_name(hw),
+ fod->fod_1st_int, fod->fod_2nd_int, fod->fod_frac);
+ pr_debug("%s - %s rate: %lu\n", __func__, clk_hw_get_name(hw), fod_rate);
+
+ return fod_rate;
+}
+
+static long vc7_fod_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *parent_rate)
+{
+ struct vc7_fod_data *fod = container_of(hw, struct vc7_fod_data, hw);
+ unsigned long fod_rate;
+
+ pr_debug("%s - %s: requested rate: %lu, parent_rate: %lu\n",
+ __func__, clk_hw_get_name(hw), rate, *parent_rate);
+
+ vc7_calc_fod_divider(rate, *parent_rate,
+ &fod->fod_1st_int, &fod->fod_2nd_int, &fod->fod_frac);
+ fod_rate = vc7_calc_fod_2nd_stage_rate(*parent_rate, fod->fod_1st_int,
+ fod->fod_2nd_int, fod->fod_frac);
+
+ pr_debug("%s - %s: fod_1st_int: %u, fod_2nd_int: %u, fod_frac: %llu\n",
+ __func__, clk_hw_get_name(hw),
+ fod->fod_1st_int, fod->fod_2nd_int, fod->fod_frac);
+ pr_debug("%s - %s rate: %lu\n", __func__, clk_hw_get_name(hw), fod_rate);
+
+ return fod_rate;
+}
+
+static int vc7_fod_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long parent_rate)
+{
+ struct vc7_fod_data *fod = container_of(hw, struct vc7_fod_data, hw);
+ struct vc7_driver_data *vc7 = fod->vc7;
+ unsigned long fod_rate;
+
+ pr_debug("%s - %s: rate: %lu, parent_rate: %lu\n",
+ __func__, clk_hw_get_name(hw), rate, parent_rate);
+
+ if (rate < VC7_FOD_RATE_MIN || rate > VC7_FOD_RATE_MAX) {
+ dev_err(&vc7->client->dev,
+ "requested frequency %lu Hz for %s is out of range\n",
+ rate, clk_hw_get_name(hw));
+ return -EINVAL;
+ }
+
+ vc7_write_fod(vc7, fod->num);
+
+ fod_rate = vc7_calc_fod_2nd_stage_rate(parent_rate, fod->fod_1st_int,
+ fod->fod_2nd_int, fod->fod_frac);
+
+ pr_debug("%s - %s: fod_1st_int: %u, fod_2nd_int: %u, fod_frac: %llu\n",
+ __func__, clk_hw_get_name(hw),
+ fod->fod_1st_int, fod->fod_2nd_int, fod->fod_frac);
+ pr_debug("%s - %s rate: %lu\n", __func__, clk_hw_get_name(hw), fod_rate);
+
+ return 0;
+}
+
+static const struct clk_ops vc7_fod_ops = {
+ .recalc_rate = vc7_fod_recalc_rate,
+ .round_rate = vc7_fod_round_rate,
+ .set_rate = vc7_fod_set_rate,
+};
+
+static unsigned long vc7_iod_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
+{
+ struct vc7_iod_data *iod = container_of(hw, struct vc7_iod_data, hw);
+ struct vc7_driver_data *vc7 = iod->vc7;
+ int err;
+ unsigned long iod_rate;
+
+ err = vc7_read_iod(vc7, iod->num);
+ if (err) {
+ dev_err(&vc7->client->dev, "error reading registers for %s\n",
+ clk_hw_get_name(hw));
+ return err;
+ }
+
+ iod_rate = div64_u64(parent_rate, iod->iod_int);
+
+ pr_debug("%s - %s: iod_int: %u\n", __func__, clk_hw_get_name(hw), iod->iod_int);
+ pr_debug("%s - %s rate: %lu\n", __func__, clk_hw_get_name(hw), iod_rate);
+
+ return iod_rate;
+}
+
+static long vc7_iod_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *parent_rate)
+{
+ struct vc7_iod_data *iod = container_of(hw, struct vc7_iod_data, hw);
+ unsigned long iod_rate;
+
+ pr_debug("%s - %s: requested rate: %lu, parent_rate: %lu\n",
+ __func__, clk_hw_get_name(hw), rate, *parent_rate);
+
+ vc7_calc_iod_divider(rate, *parent_rate, &iod->iod_int);
+ iod_rate = div64_u64(*parent_rate, iod->iod_int);
+
+ pr_debug("%s - %s: iod_int: %u\n", __func__, clk_hw_get_name(hw), iod->iod_int);
+ pr_debug("%s - %s rate: %ld\n", __func__, clk_hw_get_name(hw), iod_rate);
+
+ return iod_rate;
+}
+
+static int vc7_iod_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long parent_rate)
+{
+ struct vc7_iod_data *iod = container_of(hw, struct vc7_iod_data, hw);
+ struct vc7_driver_data *vc7 = iod->vc7;
+ unsigned long iod_rate;
+
+ pr_debug("%s - %s: rate: %lu, parent_rate: %lu\n",
+ __func__, clk_hw_get_name(hw), rate, parent_rate);
+
+ if (rate < VC7_IOD_RATE_MIN || rate > VC7_IOD_RATE_MAX) {
+ dev_err(&vc7->client->dev,
+ "requested frequency %lu Hz for %s is out of range\n",
+ rate, clk_hw_get_name(hw));
+ return -EINVAL;
+ }
+
+ vc7_write_iod(vc7, iod->num);
+
+ iod_rate = div64_u64(parent_rate, iod->iod_int);
+
+ pr_debug("%s - %s: iod_int: %u\n", __func__, clk_hw_get_name(hw), iod->iod_int);
+ pr_debug("%s - %s rate: %ld\n", __func__, clk_hw_get_name(hw), iod_rate);
+
+ return 0;
+}
+
+static const struct clk_ops vc7_iod_ops = {
+ .recalc_rate = vc7_iod_recalc_rate,
+ .round_rate = vc7_iod_round_rate,
+ .set_rate = vc7_iod_set_rate,
+};
+
+static int vc7_clk_out_prepare(struct clk_hw *hw)
+{
+ struct vc7_out_data *out = container_of(hw, struct vc7_out_data, hw);
+ struct vc7_driver_data *vc7 = out->vc7;
+ int err;
+
+ out->out_dis = 0;
+
+ err = vc7_write_output(vc7, out->num);
+ if (err) {
+ dev_err(&vc7->client->dev, "error writing registers for %s\n",
+ clk_hw_get_name(hw));
+ return err;
+ }
+
+ pr_debug("%s - %s: clk prepared\n", __func__, clk_hw_get_name(hw));
+
+ return 0;
+}
+
+static void vc7_clk_out_unprepare(struct clk_hw *hw)
+{
+ struct vc7_out_data *out = container_of(hw, struct vc7_out_data, hw);
+ struct vc7_driver_data *vc7 = out->vc7;
+ int err;
+
+ out->out_dis = 1;
+
+ err = vc7_write_output(vc7, out->num);
+ if (err) {
+ dev_err(&vc7->client->dev, "error writing registers for %s\n",
+ clk_hw_get_name(hw));
+ return;
+ }
+
+ pr_debug("%s - %s: clk unprepared\n", __func__, clk_hw_get_name(hw));
+}
+
+static int vc7_clk_out_is_enabled(struct clk_hw *hw)
+{
+ struct vc7_out_data *out = container_of(hw, struct vc7_out_data, hw);
+ struct vc7_driver_data *vc7 = out->vc7;
+ int err, is_enabled;
+
+ err = vc7_read_output(vc7, out->num);
+ if (err) {
+ dev_err(&vc7->client->dev, "error reading registers for %s\n",
+ clk_hw_get_name(hw));
+ return err;
+ }
+
+ is_enabled = !out->out_dis;
+
+ pr_debug("%s - %s: is_enabled=%d\n", __func__, clk_hw_get_name(hw), is_enabled);
+
+ return is_enabled;
+}
+
+static const struct clk_ops vc7_clk_out_ops = {
+ .prepare = vc7_clk_out_prepare,
+ .unprepare = vc7_clk_out_unprepare,
+ .is_enabled = vc7_clk_out_is_enabled,
+};
+
+static int vc7_probe(struct i2c_client *client)
+{
+ struct vc7_driver_data *vc7;
+ struct clk_init_data clk_init;
+ struct vc7_bank_src_map bank_src_map;
+ const char *node_name, *apll_name;
+ const char *parent_names[1];
+ unsigned int i, val, bank_idx, out_num;
+ unsigned long apll_rate;
+ int ret;
+
+ vc7 = devm_kzalloc(&client->dev, sizeof(*vc7), GFP_KERNEL);
+ if (!vc7)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, vc7);
+ vc7->client = client;
+ vc7->chip_info = of_device_get_match_data(&client->dev);
+
+ vc7->pin_xin = devm_clk_get(&client->dev, "xin");
+ if (PTR_ERR(vc7->pin_xin) == -EPROBE_DEFER) {
+ return dev_err_probe(&client->dev, -EPROBE_DEFER,
+ "xin not specified\n");
+ }
+
+ vc7->regmap = devm_regmap_init_i2c(client, &vc7_regmap_config);
+ if (IS_ERR(vc7->regmap)) {
+ return dev_err_probe(&client->dev, PTR_ERR(vc7->regmap),
+ "failed to allocate register map\n");
+ }
+
+ if (of_property_read_string(client->dev.of_node, "clock-output-names",
+ &node_name))
+ node_name = client->dev.of_node->name;
+
+ /* Register APLL */
+ apll_rate = vc7_get_apll_rate(vc7);
+ apll_name = kasprintf(GFP_KERNEL, "%s_apll", node_name);
+ vc7->clk_apll.clk = clk_register_fixed_rate(&client->dev, apll_name,
+ __clk_get_name(vc7->pin_xin),
+ 0, apll_rate);
+ kfree(apll_name); /* ccf made a copy of the name */
+ if (IS_ERR(vc7->clk_apll.clk)) {
+ return dev_err_probe(&client->dev, PTR_ERR(vc7->clk_apll.clk),
+ "failed to register apll\n");
+ }
+
+ /* Register FODs */
+ for (i = 0; i < VC7_NUM_FOD; i++) {
+ memset(&clk_init, 0, sizeof(clk_init));
+ clk_init.name = kasprintf(GFP_KERNEL, "%s_fod%d", node_name, i);
+ clk_init.ops = &vc7_fod_ops;
+ clk_init.parent_names = parent_names;
+ parent_names[0] = __clk_get_name(vc7->clk_apll.clk);
+ clk_init.num_parents = 1;
+ vc7->clk_fod[i].num = i;
+ vc7->clk_fod[i].vc7 = vc7;
+ vc7->clk_fod[i].hw.init = &clk_init;
+ ret = devm_clk_hw_register(&client->dev, &vc7->clk_fod[i].hw);
+ if (ret)
+ goto err_clk_register;
+ kfree(clk_init.name); /* ccf made a copy of the name */
+ }
+
+ /* Register IODs */
+ for (i = 0; i < VC7_NUM_IOD; i++) {
+ memset(&clk_init, 0, sizeof(clk_init));
+ clk_init.name = kasprintf(GFP_KERNEL, "%s_iod%d", node_name, i);
+ clk_init.ops = &vc7_iod_ops;
+ clk_init.parent_names = parent_names;
+ parent_names[0] = __clk_get_name(vc7->clk_apll.clk);
+ clk_init.num_parents = 1;
+ vc7->clk_iod[i].num = i;
+ vc7->clk_iod[i].vc7 = vc7;
+ vc7->clk_iod[i].hw.init = &clk_init;
+ ret = devm_clk_hw_register(&client->dev, &vc7->clk_iod[i].hw);
+ if (ret)
+ goto err_clk_register;
+ kfree(clk_init.name); /* ccf made a copy of the name */
+ }
+
+ /* Register outputs */
+ for (i = 0; i < vc7->chip_info->num_outputs; i++) {
+ out_num = vc7_map_index_to_output(vc7->chip_info->model, i);
+
+ /*
+ * This driver does not support remapping FOD/IOD to banks.
+ * The device state is read and the driver is setup to match
+ * the device's existing mapping.
+ */
+ bank_idx = output_bank_mapping[out_num];
+
+ regmap_read(vc7->regmap, VC7_REG_OUT_BANK_CNFG(bank_idx), &val);
+ val &= VC7_REG_OUTPUT_BANK_SRC_MASK;
+
+ memset(&bank_src_map, 0, sizeof(bank_src_map));
+ ret = vc7_get_bank_clk(vc7, bank_idx, val, &bank_src_map);
+ if (ret) {
+ dev_err_probe(&client->dev, ret,
+ "unable to register output %d\n", i);
+ return ret;
+ }
+
+ switch (bank_src_map.type) {
+ case VC7_FOD:
+ parent_names[0] = clk_hw_get_name(&bank_src_map.src.fod->hw);
+ break;
+ case VC7_IOD:
+ parent_names[0] = clk_hw_get_name(&bank_src_map.src.iod->hw);
+ break;
+ }
+
+ memset(&clk_init, 0, sizeof(clk_init));
+ clk_init.name = kasprintf(GFP_KERNEL, "%s_out%d", node_name, i);
+ clk_init.ops = &vc7_clk_out_ops;
+ clk_init.flags = CLK_SET_RATE_PARENT;
+ clk_init.parent_names = parent_names;
+ clk_init.num_parents = 1;
+ vc7->clk_out[i].num = i;
+ vc7->clk_out[i].vc7 = vc7;
+ vc7->clk_out[i].hw.init = &clk_init;
+ ret = devm_clk_hw_register(&client->dev, &vc7->clk_out[i].hw);
+ if (ret)
+ goto err_clk_register;
+ kfree(clk_init.name); /* ccf made a copy of the name */
+ }
+
+ ret = of_clk_add_hw_provider(client->dev.of_node, vc7_of_clk_get, vc7);
+ if (ret) {
+ dev_err_probe(&client->dev, ret, "unable to add clk provider\n");
+ goto err_clk;
+ }
+
+ return ret;
+
+err_clk_register:
+ dev_err_probe(&client->dev, ret,
+ "unable to register %s\n", clk_init.name);
+ kfree(clk_init.name); /* ccf made a copy of the name */
+err_clk:
+ clk_unregister_fixed_rate(vc7->clk_apll.clk);
+ return ret;
+}
+
+static int vc7_remove(struct i2c_client *client)
+{
+ struct vc7_driver_data *vc7 = i2c_get_clientdata(client);
+
+ of_clk_del_provider(client->dev.of_node);
+ clk_unregister_fixed_rate(vc7->clk_apll.clk);
+
+ return 0;
+}
+
+static bool vc7_volatile_reg(struct device *dev, unsigned int reg)
+{
+ if (reg == VC7_PAGE_ADDR)
+ return false;
+
+ return true;
+}
+
+static const struct vc7_chip_info vc7_rc21008a_info = {
+ .model = VC7_RC21008A,
+ .num_banks = 6,
+ .num_outputs = 8,
+};
+
+static struct regmap_range_cfg vc7_range_cfg[] = {
+{
+ .range_min = 0,
+ .range_max = VC7_MAX_REG,
+ .selector_reg = VC7_PAGE_ADDR,
+ .selector_mask = 0xFF,
+ .selector_shift = 0,
+ .window_start = 0,
+ .window_len = VC7_PAGE_WINDOW,
+}};
+
+static const struct regmap_config vc7_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = VC7_MAX_REG,
+ .ranges = vc7_range_cfg,
+ .num_ranges = ARRAY_SIZE(vc7_range_cfg),
+ .volatile_reg = vc7_volatile_reg,
+ .cache_type = REGCACHE_RBTREE,
+ .can_multi_write = true,
+ .reg_format_endian = REGMAP_ENDIAN_LITTLE,
+ .val_format_endian = REGMAP_ENDIAN_LITTLE,
+};
+
+static const struct i2c_device_id vc7_i2c_id[] = {
+ { "rc21008a", VC7_RC21008A },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, vc7_i2c_id);
+
+static const struct of_device_id vc7_of_match[] = {
+ { .compatible = "renesas,rc21008a", .data = &vc7_rc21008a_info },
+ {},
+};
+MODULE_DEVICE_TABLE(of, vc7_of_match);
+
+static struct i2c_driver vc7_i2c_driver = {
+ .driver = {
+ .name = "vc7",
+ .of_match_table = vc7_of_match,
+ },
+ .probe_new = vc7_probe,
+ .remove = vc7_remove,
+ .id_table = vc7_i2c_id,
+};
+module_i2c_driver(vc7_i2c_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Alex Helms <alexander.helms.jy@renesas.com");
+MODULE_DESCRIPTION("Renesas Versaclock7 common clock framework driver");
--
2.30.2