95 static inline u32 sun6i_spi_read(struct sun6i_spi *sspi, u32 reg)  in sun6i_spi_read()  argument
97 	return readl(sspi->base_addr + reg);  in sun6i_spi_read()
100 static inline void sun6i_spi_write(struct sun6i_spi *sspi, u32 reg, u32 value)  in sun6i_spi_write()  argument
102 	writel(value, sspi->base_addr + reg);  in sun6i_spi_write()
105 static inline void sun6i_spi_drain_fifo(struct sun6i_spi *sspi, int len)  in sun6i_spi_drain_fifo()  argument
111 	reg = sun6i_spi_read(sspi, SUN6I_FIFO_STA_REG);  in sun6i_spi_drain_fifo()
119 		byte = readb(sspi->base_addr + SUN6I_RXDATA_REG);  in sun6i_spi_drain_fifo()
120 		if (sspi->rx_buf)  in sun6i_spi_drain_fifo()
121 			*sspi->rx_buf++ = byte;  in sun6i_spi_drain_fifo()
125 static inline void sun6i_spi_fill_fifo(struct sun6i_spi *sspi, int len)  in sun6i_spi_fill_fifo()  argument
129 	if (len > sspi->len)  in sun6i_spi_fill_fifo()
130 		len = sspi->len;  in sun6i_spi_fill_fifo()
133 		byte = sspi->tx_buf ? *sspi->tx_buf++ : 0;  in sun6i_spi_fill_fifo()
134 		writeb(byte, sspi->base_addr + SUN6I_TXDATA_REG);  in sun6i_spi_fill_fifo()
135 		sspi->len--;  in sun6i_spi_fill_fifo()
141 	struct sun6i_spi *sspi = spi_master_get_devdata(spi->master);  in sun6i_spi_set_cs()  local
144 	reg = sun6i_spi_read(sspi, SUN6I_TFR_CTL_REG);  in sun6i_spi_set_cs()
153 	sun6i_spi_write(sspi, SUN6I_TFR_CTL_REG, reg);  in sun6i_spi_set_cs()
161 	struct sun6i_spi *sspi = spi_master_get_devdata(master);  in sun6i_spi_transfer_one()  local
171 	reinit_completion(&sspi->done);  in sun6i_spi_transfer_one()
172 	sspi->tx_buf = tfr->tx_buf;  in sun6i_spi_transfer_one()
173 	sspi->rx_buf = tfr->rx_buf;  in sun6i_spi_transfer_one()
174 	sspi->len = tfr->len;  in sun6i_spi_transfer_one()
177 	sun6i_spi_write(sspi, SUN6I_INT_STA_REG, ~0);  in sun6i_spi_transfer_one()
180 	sun6i_spi_write(sspi, SUN6I_FIFO_CTL_REG,  in sun6i_spi_transfer_one()
187 	reg = sun6i_spi_read(sspi, SUN6I_TFR_CTL_REG);  in sun6i_spi_transfer_one()
208 	if (sspi->rx_buf)  in sun6i_spi_transfer_one()
216 	sun6i_spi_write(sspi, SUN6I_TFR_CTL_REG, reg);  in sun6i_spi_transfer_one()
219 	mclk_rate = clk_get_rate(sspi->mclk);  in sun6i_spi_transfer_one()
221 		clk_set_rate(sspi->mclk, 2 * spi->max_speed_hz);  in sun6i_spi_transfer_one()
222 		mclk_rate = clk_get_rate(sspi->mclk);  in sun6i_spi_transfer_one()
250 	sun6i_spi_write(sspi, SUN6I_CLK_CTL_REG, reg);  in sun6i_spi_transfer_one()
253 	if (sspi->tx_buf)  in sun6i_spi_transfer_one()
257 	sun6i_spi_write(sspi, SUN6I_BURST_CNT_REG, SUN6I_BURST_CNT(tfr->len));  in sun6i_spi_transfer_one()
258 	sun6i_spi_write(sspi, SUN6I_XMIT_CNT_REG, SUN6I_XMIT_CNT(tx_len));  in sun6i_spi_transfer_one()
259 	sun6i_spi_write(sspi, SUN6I_BURST_CTL_CNT_REG,  in sun6i_spi_transfer_one()
263 	sun6i_spi_fill_fifo(sspi, SUN6I_FIFO_DEPTH);  in sun6i_spi_transfer_one()
266 	sun6i_spi_write(sspi, SUN6I_INT_CTL_REG, SUN6I_INT_CTL_TC);  in sun6i_spi_transfer_one()
269 	reg = sun6i_spi_read(sspi, SUN6I_TFR_CTL_REG);  in sun6i_spi_transfer_one()
270 	sun6i_spi_write(sspi, SUN6I_TFR_CTL_REG, reg | SUN6I_TFR_CTL_XCH);  in sun6i_spi_transfer_one()
272 	timeout = wait_for_completion_timeout(&sspi->done,  in sun6i_spi_transfer_one()
279 	sun6i_spi_drain_fifo(sspi, SUN6I_FIFO_DEPTH);  in sun6i_spi_transfer_one()
282 	sun6i_spi_write(sspi, SUN6I_INT_CTL_REG, 0);  in sun6i_spi_transfer_one()
289 	struct sun6i_spi *sspi = dev_id;  in sun6i_spi_handler()  local
290 	u32 status = sun6i_spi_read(sspi, SUN6I_INT_STA_REG);  in sun6i_spi_handler()
294 		sun6i_spi_write(sspi, SUN6I_INT_STA_REG, SUN6I_INT_CTL_TC);  in sun6i_spi_handler()
295 		complete(&sspi->done);  in sun6i_spi_handler()
305 	struct sun6i_spi *sspi = spi_master_get_devdata(master);  in sun6i_spi_runtime_resume()  local
308 	ret = clk_prepare_enable(sspi->hclk);  in sun6i_spi_runtime_resume()
314 	ret = clk_prepare_enable(sspi->mclk);  in sun6i_spi_runtime_resume()
320 	ret = reset_control_deassert(sspi->rstc);  in sun6i_spi_runtime_resume()
326 	sun6i_spi_write(sspi, SUN6I_GBL_CTL_REG,  in sun6i_spi_runtime_resume()
332 	clk_disable_unprepare(sspi->mclk);  in sun6i_spi_runtime_resume()
334 	clk_disable_unprepare(sspi->hclk);  in sun6i_spi_runtime_resume()
342 	struct sun6i_spi *sspi = spi_master_get_devdata(master);  in sun6i_spi_runtime_suspend()  local
344 	reset_control_assert(sspi->rstc);  in sun6i_spi_runtime_suspend()
345 	clk_disable_unprepare(sspi->mclk);  in sun6i_spi_runtime_suspend()
346 	clk_disable_unprepare(sspi->hclk);  in sun6i_spi_runtime_suspend()
354 	struct sun6i_spi *sspi;  in sun6i_spi_probe()  local
365 	sspi = spi_master_get_devdata(master);  in sun6i_spi_probe()
368 	sspi->base_addr = devm_ioremap_resource(&pdev->dev, res);  in sun6i_spi_probe()
369 	if (IS_ERR(sspi->base_addr)) {  in sun6i_spi_probe()
370 		ret = PTR_ERR(sspi->base_addr);  in sun6i_spi_probe()
382 			       0, "sun6i-spi", sspi);  in sun6i_spi_probe()
388 	sspi->master = master;  in sun6i_spi_probe()
397 	sspi->hclk = devm_clk_get(&pdev->dev, "ahb");  in sun6i_spi_probe()
398 	if (IS_ERR(sspi->hclk)) {  in sun6i_spi_probe()
400 		ret = PTR_ERR(sspi->hclk);  in sun6i_spi_probe()
404 	sspi->mclk = devm_clk_get(&pdev->dev, "mod");  in sun6i_spi_probe()
405 	if (IS_ERR(sspi->mclk)) {  in sun6i_spi_probe()
407 		ret = PTR_ERR(sspi->mclk);  in sun6i_spi_probe()
411 	init_completion(&sspi->done);  in sun6i_spi_probe()
413 	sspi->rstc = devm_reset_control_get(&pdev->dev, NULL);  in sun6i_spi_probe()
414 	if (IS_ERR(sspi->rstc)) {  in sun6i_spi_probe()
416 		ret = PTR_ERR(sspi->rstc);  in sun6i_spi_probe()