clk: exynos4: register clocks using common clock framework

The Exynos4 clocks are statically listed and registered using the
Samsung specific common clock helper functions. Both device tree
based clock lookup and clkdev based clock lookups are supported.
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Tested-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Tested-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

Documentation/devicetree/bindings/clock/exynos4-clock.txt

+* Samsung Exynos4 Clock Controller
+
+The Exynos4 clock controller generates and supplies clock to various controllers
+within the Exynos4 SoC. The clock binding described here is applicable to all
+SoC's in the Exynos4 family.
+
+Required Properties:
+
+- comptible: should be one of the following.
+  - "samsung,exynos4210-clock" - controller compatible with Exynos4210 SoC.
+  - "samsung,exynos4412-clock" - controller compatible with Exynos4412 SoC.
+
+- reg: physical base address of the controller and length of memory mapped
+  region.
+
+- #clock-cells: should be 1.
+
+The following is the list of clocks generated by the controller. Each clock is
+assigned an identifier and client nodes use this identifier to specify the
+clock which they consume. Some of the clocks are available only on a particular
+Exynos4 SoC and this is specified where applicable.
+
+
+		 [Core Clocks]
+
+  Clock               ID      SoC (if specific)
+  -----------------------------------------------
+
+  xxti                1
+  xusbxti             2
+  fin_pll             3
+  fout_apll           4
+  fout_mpll           5
+  fout_epll           6
+  fout_vpll           7
+  sclk_apll           8
+  sclk_mpll           9
+  sclk_epll           10
+  sclk_vpll           11
+  arm_clk             12
+  aclk200             13
+  aclk100             14
+  aclk160             15
+  aclk133             16
+
+
+            [Clock Gate for Special Clocks]
+
+  Clock               ID      SoC (if specific)
+  -----------------------------------------------
+
+  sclk_fimc0          128
+  sclk_fimc1          129
+  sclk_fimc2          130
+  sclk_fimc3          131
+  sclk_cam0           132
+  sclk_cam1           133
+  sclk_csis0          134
+  sclk_csis1          135
+  sclk_hdmi           136
+  sclk_mixer          137
+  sclk_dac            138
+  sclk_pixel          139
+  sclk_fimd0          140
+  sclk_mdnie0         141     Exynos4412
+  sclk_mdnie_pwm0 12  142     Exynos4412
+  sclk_mipi0          143
+  sclk_audio0         144
+  sclk_mmc0           145
+  sclk_mmc1           146
+  sclk_mmc2           147
+  sclk_mmc3           148
+  sclk_mmc4           149
+  sclk_sata           150     Exynos4210
+  sclk_uart0          151
+  sclk_uart1          152
+  sclk_uart2          153
+  sclk_uart3          154
+  sclk_uart4          155
+  sclk_audio1         156
+  sclk_audio2         157
+  sclk_spdif          158
+  sclk_spi0           159
+  sclk_spi1           160
+  sclk_spi2           161
+  sclk_slimbus        162
+  sclk_fimd1          163     Exynos4210
+  sclk_mipi1          164     Exynos4210
+  sclk_pcm1           165
+  sclk_pcm2           166
+  sclk_i2s1           167
+  sclk_i2s2           168
+  sclk_mipihsi        169     Exynos4412
+
+
+	      [Peripheral Clock Gates]
+
+  Clock               ID      SoC (if specific)
+  -----------------------------------------------
+
+  fimc0               256
+  fimc1               257
+  fimc2               258
+  fimc3               259
+  csis0               260
+  csis1               261
+  jpeg                262
+  smmu_fimc0          263
+  smmu_fimc1          264
+  smmu_fimc2          265
+  smmu_fimc3          266
+  smmu_jpeg           267
+  vp                  268
+  mixer               269
+  tvenc               270     Exynos4210
+  hdmi                271
+  smmu_tv             272
+  mfc                 273
+  smmu_mfcl           274
+  smmu_mfcr           275
+  g3d                 276
+  g2d                 277     Exynos4210
+  rotator             278     Exynos4210
+  mdma                279     Exynos4210
+  smmu_g2d            280     Exynos4210
+  smmu_rotator        281     Exynos4210
+  smmu_mdma           282     Exynos4210
+  fimd0               283
+  mie0                284
+  mdnie0              285     Exynos4412
+  dsim0               286
+  smmu_fimd0          287
+  fimd1               288     Exynos4210
+  mie1                289     Exynos4210
+  dsim1               290     Exynos4210
+  smmu_fimd1          291     Exynos4210
+  pdma0               292
+  pdma1               293
+  pcie_phy            294
+  sata_phy            295     Exynos4210
+  tsi                 296
+  sdmmc0              297
+  sdmmc1              298
+  sdmmc2              299
+  sdmmc3              300
+  sdmmc4              301
+  sata                302     Exynos4210
+  sromc               303
+  usb_host            304
+  usb_device          305
+  pcie                306
+  onenand             307
+  nfcon               308
+  smmu_pcie           309
+  gps                 310
+  smmu_gps            311
+  uart0               312
+  uart1               313
+  uart2               314
+  uart3               315
+  uart4               316
+  i2c0                317
+  i2c1                318
+  i2c2                319
+  i2c3                320
+  i2c4                321
+  i2c5                322
+  i2c6                323
+  i2c7                324
+  i2c_hdmi            325
+  tsadc               326
+  spi0                327
+  spi1                328
+  spi2                329
+  i2s1                330
+  i2s2                331
+  pcm0                332
+  i2s0                333
+  pcm1                334
+  pcm2                335
+  pwm                 336
+  slimbus             337
+  spdif               338
+  ac97                339
+  modemif             340
+  chipid              341
+  sysreg              342
+  hdmi_cec            343
+  mct                 344
+  wdt                 345
+  rtc                 346
+  keyif               347
+  audss               348
+  mipi_hsi            349     Exynos4210
+  mdma2               350     Exynos4210
+
+Example 1: An example of a clock controller node is listed below.
+
+	clock: clock-controller@0x10030000 {
+		compatible = "samsung,exynos4210-clock";
+		reg = <0x10030000 0x20000>;
+		#clock-cells = <1>;
+	};
+
+Example 2: UART controller node that consumes the clock generated by the clock
+	   controller. Refer to the standard clock bindings for information
+	   about 'clocks' and 'clock-names' property.
+
+	serial@13820000 {
+		compatible = "samsung,exynos4210-uart";
+		reg = <0x13820000 0x100>;
+		interrupts = <0 54 0>;
+		clocks = <&clock 314>, <&clock 153>;
+		clock-names = "uart", "clk_uart_baud0";
+	};

drivers/clk/samsung/Makefile

@@ -3,3 +3,4 @@
 #
 
 obj-$(CONFIG_COMMON_CLK)	+= clk.o clk-pll.o
+obj-$(CONFIG_ARCH_EXYNOS4)	+= clk-exynos4.o