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irqchip/qcom-pdc: Add support for v3.2 HW
Starting from HW version 3.2 the IRQ_ENABLE bit has moved to the IRQ_i_CFG register and requires a change of the driver to avoid writing into an undefined register address. Get the HW version from registers and set the IRQ_ENABLE bit to the correct register depending on the HW version. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Reviewed-by: Maulik Shah <quic_mkshah@quicinc.com> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> Acked-by: Konrad Dybcio <konrad.dybcio@linaro.org> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20230905-topic-sm8x50-upstream-pdc-ver-v4-1-fc633c7df84b@linaro.org
This commit is contained in:
parent
0bb80ecc33
commit
5873d380f4
1 changed files with 51 additions and 18 deletions
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@ -22,9 +22,20 @@
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#define PDC_MAX_GPIO_IRQS 256
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#define PDC_MAX_GPIO_IRQS 256
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/* Valid only on HW version < 3.2 */
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#define IRQ_ENABLE_BANK 0x10
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#define IRQ_ENABLE_BANK 0x10
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#define IRQ_i_CFG 0x110
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#define IRQ_i_CFG 0x110
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/* Valid only on HW version >= 3.2 */
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#define IRQ_i_CFG_IRQ_ENABLE 3
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#define IRQ_i_CFG_TYPE_MASK GENMASK(2, 0)
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#define PDC_VERSION_REG 0x1000
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/* Notable PDC versions */
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#define PDC_VERSION_3_2 0x30200
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struct pdc_pin_region {
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struct pdc_pin_region {
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u32 pin_base;
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u32 pin_base;
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u32 parent_base;
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u32 parent_base;
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@ -37,6 +48,7 @@ static DEFINE_RAW_SPINLOCK(pdc_lock);
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static void __iomem *pdc_base;
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static void __iomem *pdc_base;
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static struct pdc_pin_region *pdc_region;
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static struct pdc_pin_region *pdc_region;
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static int pdc_region_cnt;
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static int pdc_region_cnt;
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static unsigned int pdc_version;
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static void pdc_reg_write(int reg, u32 i, u32 val)
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static void pdc_reg_write(int reg, u32 i, u32 val)
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{
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{
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@ -48,20 +60,32 @@ static u32 pdc_reg_read(int reg, u32 i)
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return readl_relaxed(pdc_base + reg + i * sizeof(u32));
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return readl_relaxed(pdc_base + reg + i * sizeof(u32));
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}
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}
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static void pdc_enable_intr(struct irq_data *d, bool on)
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static void __pdc_enable_intr(int pin_out, bool on)
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{
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{
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int pin_out = d->hwirq;
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unsigned long enable;
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unsigned long enable;
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unsigned long flags;
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if (pdc_version < PDC_VERSION_3_2) {
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u32 index, mask;
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u32 index, mask;
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index = pin_out / 32;
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index = pin_out / 32;
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mask = pin_out % 32;
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mask = pin_out % 32;
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raw_spin_lock_irqsave(&pdc_lock, flags);
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enable = pdc_reg_read(IRQ_ENABLE_BANK, index);
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enable = pdc_reg_read(IRQ_ENABLE_BANK, index);
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__assign_bit(mask, &enable, on);
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__assign_bit(mask, &enable, on);
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pdc_reg_write(IRQ_ENABLE_BANK, index, enable);
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pdc_reg_write(IRQ_ENABLE_BANK, index, enable);
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} else {
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enable = pdc_reg_read(IRQ_i_CFG, pin_out);
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__assign_bit(IRQ_i_CFG_IRQ_ENABLE, &enable, on);
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pdc_reg_write(IRQ_i_CFG, pin_out, enable);
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}
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}
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static void pdc_enable_intr(struct irq_data *d, bool on)
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{
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unsigned long flags;
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raw_spin_lock_irqsave(&pdc_lock, flags);
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__pdc_enable_intr(d->hwirq, on);
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raw_spin_unlock_irqrestore(&pdc_lock, flags);
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raw_spin_unlock_irqrestore(&pdc_lock, flags);
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}
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}
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@ -142,6 +166,7 @@ static int qcom_pdc_gic_set_type(struct irq_data *d, unsigned int type)
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}
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}
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old_pdc_type = pdc_reg_read(IRQ_i_CFG, d->hwirq);
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old_pdc_type = pdc_reg_read(IRQ_i_CFG, d->hwirq);
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pdc_type |= (old_pdc_type & ~IRQ_i_CFG_TYPE_MASK);
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pdc_reg_write(IRQ_i_CFG, d->hwirq, pdc_type);
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pdc_reg_write(IRQ_i_CFG, d->hwirq, pdc_type);
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ret = irq_chip_set_type_parent(d, type);
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ret = irq_chip_set_type_parent(d, type);
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@ -246,7 +271,6 @@ static const struct irq_domain_ops qcom_pdc_ops = {
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static int pdc_setup_pin_mapping(struct device_node *np)
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static int pdc_setup_pin_mapping(struct device_node *np)
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{
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{
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int ret, n, i;
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int ret, n, i;
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u32 irq_index, reg_index, val;
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n = of_property_count_elems_of_size(np, "qcom,pdc-ranges", sizeof(u32));
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n = of_property_count_elems_of_size(np, "qcom,pdc-ranges", sizeof(u32));
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if (n <= 0 || n % 3)
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if (n <= 0 || n % 3)
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@ -276,29 +300,38 @@ static int pdc_setup_pin_mapping(struct device_node *np)
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if (ret)
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if (ret)
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return ret;
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return ret;
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for (i = 0; i < pdc_region[n].cnt; i++) {
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for (i = 0; i < pdc_region[n].cnt; i++)
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reg_index = (i + pdc_region[n].pin_base) >> 5;
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__pdc_enable_intr(i + pdc_region[n].pin_base, 0);
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irq_index = (i + pdc_region[n].pin_base) & 0x1f;
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val = pdc_reg_read(IRQ_ENABLE_BANK, reg_index);
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val &= ~BIT(irq_index);
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pdc_reg_write(IRQ_ENABLE_BANK, reg_index, val);
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}
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}
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}
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return 0;
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return 0;
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}
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}
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#define QCOM_PDC_SIZE 0x30000
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static int qcom_pdc_init(struct device_node *node, struct device_node *parent)
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static int qcom_pdc_init(struct device_node *node, struct device_node *parent)
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{
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{
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struct irq_domain *parent_domain, *pdc_domain;
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struct irq_domain *parent_domain, *pdc_domain;
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resource_size_t res_size;
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struct resource res;
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int ret;
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int ret;
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pdc_base = of_iomap(node, 0);
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/* compat with old sm8150 DT which had very small region for PDC */
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if (of_address_to_resource(node, 0, &res))
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return -EINVAL;
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res_size = max_t(resource_size_t, resource_size(&res), QCOM_PDC_SIZE);
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if (res_size > resource_size(&res))
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pr_warn("%pOF: invalid reg size, please fix DT\n", node);
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pdc_base = ioremap(res.start, res_size);
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if (!pdc_base) {
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if (!pdc_base) {
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pr_err("%pOF: unable to map PDC registers\n", node);
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pr_err("%pOF: unable to map PDC registers\n", node);
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return -ENXIO;
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return -ENXIO;
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}
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}
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pdc_version = pdc_reg_read(PDC_VERSION_REG, 0);
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parent_domain = irq_find_host(parent);
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parent_domain = irq_find_host(parent);
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if (!parent_domain) {
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if (!parent_domain) {
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pr_err("%pOF: unable to find PDC's parent domain\n", node);
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pr_err("%pOF: unable to find PDC's parent domain\n", node);
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