16 #include <linux/spi/spi.h>
39 static void slic_write(struct spi_device *spi, u16 addr,  in slic_write()  argument
50 	/* write spi addr and value */  in slic_write()
51 	spi_write(spi, &temp[0], SLIC_THREE_LEN);  in slic_write()
54 static u8 slic_read(struct spi_device *spi, u16 addr)  in slic_read()  argument
63 	spi_write_then_read(spi, &temp[0], SLIC_TWO_LEN, &data,  in slic_read()
70 static bool get_slic_product_code(struct spi_device *spi)  in get_slic_product_code()  argument
74 	device_id = slic_read(spi, DS26522_IDR_ADDR);  in get_slic_product_code()
81 static void ds26522_e1_spec_config(struct spi_device *spi)  in ds26522_e1_spec_config()  argument
84 	slic_write(spi, DS26522_RMMR_ADDR, DS26522_RMMR_E1);  in ds26522_e1_spec_config()
87 	slic_write(spi, DS26522_TMMR_ADDR, DS26522_TMMR_E1);  in ds26522_e1_spec_config()
90 	slic_write(spi, DS26522_RMMR_ADDR,  in ds26522_e1_spec_config()
91 		   slic_read(spi, DS26522_RMMR_ADDR) | DS26522_RMMR_FRM_EN);  in ds26522_e1_spec_config()
94 	slic_write(spi, DS26522_TMMR_ADDR,  in ds26522_e1_spec_config()
95 		   slic_read(spi, DS26522_TMMR_ADDR) | DS26522_TMMR_FRM_EN);  in ds26522_e1_spec_config()
98 	slic_write(spi, DS26522_RCR1_ADDR,  in ds26522_e1_spec_config()
102 	slic_write(spi, DS26522_RIOCR_ADDR,  in ds26522_e1_spec_config()
106 	slic_write(spi, DS26522_TCR1_ADDR, DS26522_TCR1_TB8ZS);  in ds26522_e1_spec_config()
109 	slic_write(spi, DS26522_TIOCR_ADDR,  in ds26522_e1_spec_config()
113 	slic_write(spi, DS26522_E1TAF_ADDR, DS26522_E1TAF_DEFAULT);  in ds26522_e1_spec_config()
116 	slic_write(spi, DS26522_E1TNAF_ADDR, DS26522_E1TNAF_DEFAULT);  in ds26522_e1_spec_config()
119 	slic_write(spi, DS26522_RMMR_ADDR, slic_read(spi, DS26522_RMMR_ADDR) |  in ds26522_e1_spec_config()
123 	slic_write(spi, DS26522_TMMR_ADDR, slic_read(spi, DS26522_TMMR_ADDR) |  in ds26522_e1_spec_config()
127 	slic_write(spi, DS26522_LTRCR_ADDR, DS26522_LTRCR_E1);  in ds26522_e1_spec_config()
130 	slic_write(spi, DS26522_LTITSR_ADDR,  in ds26522_e1_spec_config()
134 	slic_write(spi, DS26522_LRISMR_ADDR,  in ds26522_e1_spec_config()
138 	slic_write(spi, DS26522_LMCR_ADDR, DS26522_LMCR_TE);  in ds26522_e1_spec_config()
141 static int slic_ds26522_init_configure(struct spi_device *spi)  in slic_ds26522_init_configure()  argument
146 	slic_write(spi, DS26522_GTCCR_ADDR, DS26522_GTCCR_BPREFSEL_REFCLKIN |  in slic_ds26522_init_configure()
149 	slic_write(spi, DS26522_GTCR2_ADDR, DS26522_GTCR2_TSSYNCOUT);  in slic_ds26522_init_configure()
150 	slic_write(spi, DS26522_GFCR_ADDR, DS26522_GFCR_BPCLK_2048KHZ);  in slic_ds26522_init_configure()
153 	slic_write(spi, DS26522_GTCR1_ADDR, DS26522_GTCR1);  in slic_ds26522_init_configure()
156 	slic_write(spi, DS26522_GLSRR_ADDR, DS26522_GLSRR_RESET);  in slic_ds26522_init_configure()
159 	slic_write(spi, DS26522_GFSRR_ADDR, DS26522_GFSRR_RESET);  in slic_ds26522_init_configure()
163 	slic_write(spi, DS26522_GLSRR_ADDR, DS26522_GLSRR_NORMAL);  in slic_ds26522_init_configure()
164 	slic_write(spi, DS26522_GFSRR_ADDR, DS26522_GFSRR_NORMAL);  in slic_ds26522_init_configure()
167 	slic_write(spi, DS26522_RMMR_ADDR, DS26522_RMMR_SFTRST);  in slic_ds26522_init_configure()
170 	slic_write(spi, DS26522_TMMR_ADDR, DS26522_TMMR_SFTRST);  in slic_ds26522_init_configure()
177 		slic_write(spi, addr, 0);  in slic_ds26522_init_configure()
181 		slic_write(spi, addr, 0);  in slic_ds26522_init_configure()
185 		slic_write(spi, addr, 0);  in slic_ds26522_init_configure()
189 		slic_write(spi, addr, 0);  in slic_ds26522_init_configure()
192 	ds26522_e1_spec_config(spi);  in slic_ds26522_init_configure()
194 	slic_write(spi, DS26522_GTCR1_ADDR, 0x00);  in slic_ds26522_init_configure()
199 static int slic_ds26522_remove(struct spi_device *spi)  in slic_ds26522_remove()  argument
205 static int slic_ds26522_probe(struct spi_device *spi)  in slic_ds26522_probe()  argument
209 	g_spi = spi;  in slic_ds26522_probe()
210 	spi->bits_per_word = 8;  in slic_ds26522_probe()
212 	if (!get_slic_product_code(spi))  in slic_ds26522_probe()
215 	ret = slic_ds26522_init_configure(spi);  in slic_ds26522_probe()
217 		pr_info("DS26522 cs%d configured\n", spi->chip_select);  in slic_ds26522_probe()
226 MODULE_DEVICE_TABLE(spi, slic_ds26522_id);