Lines Matching refs:apb
71 static inline unsigned long bt1_apb_n_to_timeout_us(struct bt1_apb *apb, u32 n)
75 do_div(timeout, apb->rate);
81 static inline unsigned long bt1_apb_timeout_to_n_us(struct bt1_apb *apb,
84 u64 n = (u64)timeout * apb->rate;
94 struct bt1_apb *apb = data;
97 regmap_read(apb->regs, APB_EHB_ADDR, &addr);
99 dev_crit_ratelimited(apb->dev,
101 atomic_inc_return(&apb->count),
113 regmap_update_bits(apb->regs, APB_EHB_ISR, APB_EHB_ISR_PENDING, 0);
120 struct bt1_apb *apb = data;
121 struct platform_device *pdev = to_platform_device(apb->dev);
129 struct bt1_apb *apb;
132 apb = devm_kzalloc(dev, sizeof(*apb), GFP_KERNEL);
133 if (!apb)
136 ret = devm_add_action(dev, bt1_apb_clear_data, apb);
142 apb->dev = dev;
143 atomic_set(&apb->count, 0);
144 platform_set_drvdata(pdev, apb);
146 return apb;
149 static int bt1_apb_request_regs(struct bt1_apb *apb)
151 struct platform_device *pdev = to_platform_device(apb->dev);
156 dev_err(apb->dev, "Couldn't map APB EHB registers\n");
160 apb->regs = devm_regmap_init_mmio(apb->dev, regs, &bt1_apb_regmap_cfg);
161 if (IS_ERR(apb->regs)) {
162 dev_err(apb->dev, "Couldn't create APB EHB regmap\n");
163 return PTR_ERR(apb->regs);
166 apb->res = devm_platform_ioremap_resource_byname(pdev, "nodev");
167 if (IS_ERR(apb->res))
168 dev_err(apb->dev, "Couldn't map reserved region\n");
170 return PTR_ERR_OR_ZERO(apb->res);
173 static int bt1_apb_request_rst(struct bt1_apb *apb)
177 apb->prst = devm_reset_control_get_optional_exclusive(apb->dev, "prst");
178 if (IS_ERR(apb->prst)) {
179 dev_warn(apb->dev, "Couldn't get reset control line\n");
180 return PTR_ERR(apb->prst);
183 ret = reset_control_deassert(apb->prst);
185 dev_err(apb->dev, "Failed to deassert the reset line\n");
192 struct bt1_apb *apb = data;
194 clk_disable_unprepare(apb->pclk);
197 static int bt1_apb_request_clk(struct bt1_apb *apb)
201 apb->pclk = devm_clk_get(apb->dev, "pclk");
202 if (IS_ERR(apb->pclk)) {
203 dev_err(apb->dev, "Couldn't get APB clock descriptor\n");
204 return PTR_ERR(apb->pclk);
207 ret = clk_prepare_enable(apb->pclk);
209 dev_err(apb->dev, "Couldn't enable the APB clock\n");
213 ret = devm_add_action_or_reset(apb->dev, bt1_apb_disable_clk, apb);
215 dev_err(apb->dev, "Can't add APB EHB clocks disable action\n");
219 apb->rate = clk_get_rate(apb->pclk);
220 if (!apb->rate) {
221 dev_err(apb->dev, "Invalid clock rate\n");
230 struct bt1_apb *apb = data;
232 regmap_update_bits(apb->regs, APB_EHB_ISR, APB_EHB_ISR_MASK, 0);
235 static int bt1_apb_request_irq(struct bt1_apb *apb)
237 struct platform_device *pdev = to_platform_device(apb->dev);
240 apb->irq = platform_get_irq(pdev, 0);
241 if (apb->irq < 0)
242 return apb->irq;
244 ret = devm_request_irq(apb->dev, apb->irq, bt1_apb_isr, IRQF_SHARED,
245 "bt1-apb", apb);
247 dev_err(apb->dev, "Couldn't request APB EHB IRQ\n");
251 ret = devm_add_action(apb->dev, bt1_apb_clear_irq, apb);
253 dev_err(apb->dev, "Can't add APB EHB IRQs clear action\n");
258 regmap_update_bits(apb->regs, APB_EHB_ISR,
268 struct bt1_apb *apb = dev_get_drvdata(dev);
270 return scnprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&apb->count));
277 struct bt1_apb *apb = dev_get_drvdata(dev);
282 ret = regmap_read(apb->regs, APB_EHB_TIMEOUT, &n);
286 timeout = bt1_apb_n_to_timeout_us(apb, n);
295 struct bt1_apb *apb = dev_get_drvdata(dev);
303 n = bt1_apb_timeout_to_n_us(apb, timeout);
306 ret = regmap_write(apb->regs, APB_EHB_TIMEOUT, n);
322 struct bt1_apb *apb = dev_get_drvdata(dev);
329 readl(apb->res);
331 regmap_update_bits(apb->regs, APB_EHB_ISR, APB_EHB_ISR_PENDING,
350 struct bt1_apb *apb = data;
352 device_remove_groups(apb->dev, bt1_apb_sysfs_groups);
355 static int bt1_apb_init_sysfs(struct bt1_apb *apb)
359 ret = device_add_groups(apb->dev, bt1_apb_sysfs_groups);
361 dev_err(apb->dev, "Failed to create EHB APB sysfs nodes\n");
365 ret = devm_add_action_or_reset(apb->dev, bt1_apb_remove_sysfs, apb);
367 dev_err(apb->dev, "Can't add APB EHB sysfs remove action\n");
374 struct bt1_apb *apb;
377 apb = bt1_apb_create_data(pdev);
378 if (IS_ERR(apb))
379 return PTR_ERR(apb);
381 ret = bt1_apb_request_regs(apb);
385 ret = bt1_apb_request_rst(apb);
389 ret = bt1_apb_request_clk(apb);
393 ret = bt1_apb_request_irq(apb);
397 ret = bt1_apb_init_sysfs(apb);
405 { .compatible = "baikal,bt1-apb" },
413 .name = "bt1-apb",