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clk: gxbb: add the SAR ADC clocks and expose them

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The HHI_SAR_CLK_CNTL contains three SAR ADC specific clocks:
- a mux clock to choose between different ADC reference clocks (this is
  2-bit wide, but the datasheet only lists the parents for the first
  bit)
- a divider for the input/reference clock
- a gate which enables the ADC clock

Additionally this exposes the ADC core clock (CLKID_SAR_ADC) and
CLKID_SANA (which seems to enable the analog inputs, but unfortunately
there is no documentation for this - we just mimic what the vendor
driver does).

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Tested-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
This commit is contained in:
Martin Blumenstingl 2017-01-19 15:58:20 +01:00 committed by Kevin Hilman
parent 0264a88d61
commit 33d0fcdfe0
3 changed files with 58 additions and 3 deletions
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48
drivers/clk/meson/gxbb.c
View File

@ -564,6 +564,46 @@ static struct clk_gate gxbb_clk81 = {
},
};
static struct clk_mux gxbb_sar_adc_clk_sel = {
.reg = (void *)HHI_SAR_CLK_CNTL,
.mask = 0x3,
.shift = 9,
.lock = &clk_lock,
.hw.init = &(struct clk_init_data){
.name = "sar_adc_clk_sel",
.ops = &clk_mux_ops,
/* NOTE: The datasheet doesn't list the parents for bit 10 */
.parent_names = (const char *[]){ "xtal", "clk81", },
.num_parents = 2,
},
};
static struct clk_divider gxbb_sar_adc_clk_div = {
.reg = (void *)HHI_SAR_CLK_CNTL,
.shift = 0,
.width = 8,
.lock = &clk_lock,
.hw.init = &(struct clk_init_data){
.name = "sar_adc_clk_div",
.ops = &clk_divider_ops,
.parent_names = (const char *[]){ "sar_adc_clk_sel" },
.num_parents = 1,
},
};
static struct clk_gate gxbb_sar_adc_clk = {
.reg = (void *)HHI_SAR_CLK_CNTL,
.bit_idx = 8,
.lock = &clk_lock,
.hw.init = &(struct clk_init_data){
.name = "sar_adc_clk",
.ops = &clk_gate_ops,
.parent_names = (const char *[]){ "sar_adc_clk_div" },
.num_parents = 1,
.flags = CLK_SET_RATE_PARENT,
},
};
/* Everything Else (EE) domain gates */
static MESON_GATE(gxbb_ddr, HHI_GCLK_MPEG0, 0);
static MESON_GATE(gxbb_dos, HHI_GCLK_MPEG0, 1);
@ -754,6 +794,9 @@ static struct clk_hw_onecell_data gxbb_hw_onecell_data = {
[CLKID_SD_EMMC_A] = &gxbb_emmc_a.hw,
[CLKID_SD_EMMC_B] = &gxbb_emmc_b.hw,
[CLKID_SD_EMMC_C] = &gxbb_emmc_c.hw,
[CLKID_SAR_ADC_CLK] = &gxbb_sar_adc_clk.hw,
[CLKID_SAR_ADC_SEL] = &gxbb_sar_adc_clk_sel.hw,
[CLKID_SAR_ADC_DIV] = &gxbb_sar_adc_clk_div.hw,
},
.num = NR_CLKS,
};
@ -856,6 +899,7 @@ static struct clk_gate *gxbb_clk_gates[] = {
&gxbb_emmc_a,
&gxbb_emmc_b,
&gxbb_emmc_c,
&gxbb_sar_adc_clk,
};
static int gxbb_clkc_probe(struct platform_device *pdev)
@ -888,6 +932,10 @@ static int gxbb_clkc_probe(struct platform_device *pdev)
gxbb_mpeg_clk_sel.reg = clk_base + (u64)gxbb_mpeg_clk_sel.reg;
gxbb_mpeg_clk_div.reg = clk_base + (u64)gxbb_mpeg_clk_div.reg;
/* Populate the base address for the SAR ADC clks */
gxbb_sar_adc_clk_sel.reg = clk_base + (u64)gxbb_sar_adc_clk_sel.reg;
gxbb_sar_adc_clk_div.reg = clk_base + (u64)gxbb_sar_adc_clk_div.reg;
/* Populate base address for gates */
for (i = 0; i < ARRAY_SIZE(gxbb_clk_gates); i++)
gxbb_clk_gates[i]->reg = clk_base +

9
drivers/clk/meson/gxbb.h
View File

@ -191,7 +191,7 @@
#define CLKID_PERIPHS 20
#define CLKID_SPICC 21
/* CLKID_I2C */
#define CLKID_SAR_ADC 23
/* #define CLKID_SAR_ADC */
#define CLKID_SMART_CARD 24
#define CLKID_RNG0 25
#define CLKID_UART0 26
@ -237,7 +237,7 @@
#define CLKID_MMC_PCLK 66
#define CLKID_DVIN 67
#define CLKID_UART2 68
#define CLKID_SANA 69
/* #define CLKID_SANA */
#define CLKID_VPU_INTR 70
#define CLKID_SEC_AHB_AHB3_BRIDGE 71
#define CLKID_CLK81_A53 72
@ -265,8 +265,11 @@
/* CLKID_SD_EMMC_A */
/* CLKID_SD_EMMC_B */
/* CLKID_SD_EMMC_C */
/* CLKID_SAR_ADC_CLK */
/* CLKID_SAR_ADC_SEL */
#define CLKID_SAR_ADC_DIV 99
#define NR_CLKS 97
#define NR_CLKS 100
/* include the CLKIDs that have been made part of the stable DT binding */
#include <dt-bindings/clock/gxbb-clkc.h>

4
include/dt-bindings/clock/gxbb-clkc.h
View File

@ -14,6 +14,7 @@
#define CLKID_MPLL2 15
#define CLKID_SPI 34
#define CLKID_I2C 22
#define CLKID_SAR_ADC 23
#define CLKID_ETH 36
#define CLKID_USB0 50
#define CLKID_USB1 51
@ -21,10 +22,13 @@
#define CLKID_HDMI_PCLK 63
#define CLKID_USB1_DDR_BRIDGE 64
#define CLKID_USB0_DDR_BRIDGE 65
#define CLKID_SANA 69
#define CLKID_GCLK_VENCI_INT0 77
#define CLKID_AO_I2C 93
#define CLKID_SD_EMMC_A 94
#define CLKID_SD_EMMC_B 95
#define CLKID_SD_EMMC_C 96
#define CLKID_SAR_ADC_CLK 97
#define CLKID_SAR_ADC_SEL 98
#endif /* __GXBB_CLKC_H */